diff --git a/README.md b/README.md
index 33cd29f3c..fea705d18 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# lodash v4.4.3
+# lodash v4.5.0
 
 The [lodash](https://lodash.com/) library exported as [npm packages](https://www.npmjs.com/browse/keyword/lodash-modularized) per method.
 
diff --git a/lodash._baseclone/LICENSE b/lodash._baseclone/LICENSE
new file mode 100644
index 000000000..bcbe13d67
--- /dev/null
+++ b/lodash._baseclone/LICENSE
@@ -0,0 +1,23 @@
+The MIT License (MIT)
+
+Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
+Based on Underscore.js, copyright 2009-2016 Jeremy Ashkenas,
+DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/lodash._baseclone/README.md b/lodash._baseclone/README.md
new file mode 100644
index 000000000..68cb67aca
--- /dev/null
+++ b/lodash._baseclone/README.md
@@ -0,0 +1,18 @@
+# lodash._baseclone v4.5.0
+
+The internal [lodash](https://lodash.com/) function `baseClone` exported as a [Node.js](https://nodejs.org/) module.
+
+## Installation
+
+Using npm:
+```bash
+$ {sudo -H} npm i -g npm
+$ npm i --save lodash._baseclone
+```
+
+In Node.js:
+```js
+var baseClone = require('lodash._baseclone');
+```
+
+See the [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash._baseclone) for more details.
diff --git a/lodash._baseclone/index.js b/lodash._baseclone/index.js
new file mode 100644
index 000000000..ebc5a9d9a
--- /dev/null
+++ b/lodash._baseclone/index.js
@@ -0,0 +1,1657 @@
+/**
+ * lodash 4.5.0 (Custom Build) <https://lodash.com/>
+ * Build: `lodash modularize exports="npm" -o ./`
+ * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
+ * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
+ * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+ * Available under MIT license <https://lodash.com/license>
+ */
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used as references for various `Number` constants. */
+var MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match `RegExp` [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns). */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match `RegExp` flags from their coerced string values. */
+var reFlags = /\w*$/;
+
+/** Used to detect host constructors (Safari > 5). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values supported by `_.clone`. */
+var cloneableTags = {};
+cloneableTags[argsTag] = cloneableTags[arrayTag] =
+cloneableTags[arrayBufferTag] = cloneableTags[boolTag] =
+cloneableTags[dateTag] = cloneableTags[float32Tag] =
+cloneableTags[float64Tag] = cloneableTags[int8Tag] =
+cloneableTags[int16Tag] = cloneableTags[int32Tag] =
+cloneableTags[mapTag] = cloneableTags[numberTag] =
+cloneableTags[objectTag] = cloneableTags[regexpTag] =
+cloneableTags[setTag] = cloneableTags[stringTag] =
+cloneableTags[symbolTag] = cloneableTags[uint8Tag] =
+cloneableTags[uint8ClampedTag] = cloneableTags[uint16Tag] =
+cloneableTags[uint32Tag] = true;
+cloneableTags[errorTag] = cloneableTags[funcTag] =
+cloneableTags[weakMapTag] = false;
+
+/** Used to determine if values are of the language type `Object`. */
+var objectTypes = {
+  'function': true,
+  'object': true
+};
+
+/** Detect free variable `exports`. */
+var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType)
+  ? exports
+  : undefined;
+
+/** Detect free variable `module`. */
+var freeModule = (objectTypes[typeof module] && module && !module.nodeType)
+  ? module
+  : undefined;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = (freeModule && freeModule.exports === freeExports)
+  ? freeExports
+  : undefined;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = checkGlobal(freeExports && freeModule && typeof global == 'object' && global);
+
+/** Detect free variable `self`. */
+var freeSelf = checkGlobal(objectTypes[typeof self] && self);
+
+/** Detect free variable `window`. */
+var freeWindow = checkGlobal(objectTypes[typeof window] && window);
+
+/** Detect `this` as the global object. */
+var thisGlobal = checkGlobal(objectTypes[typeof this] && this);
+
+/**
+ * Used as a reference to the global object.
+ *
+ * The `this` value is used if it's the global object to avoid Greasemonkey's
+ * restricted `window` object, otherwise the `window` object is used.
+ */
+var root = freeGlobal ||
+  ((freeWindow !== (thisGlobal && thisGlobal.window)) && freeWindow) ||
+    freeSelf || thisGlobal || Function('return this')();
+
+/**
+ * Adds the key-value `pair` to `map`.
+ *
+ * @private
+ * @param {Object} map The map to modify.
+ * @param {Array} pair The key-value pair to add.
+ * @returns {Object} Returns `map`.
+ */
+function addMapEntry(map, pair) {
+  map.set(pair[0], pair[1]);
+  return map;
+}
+
+/**
+ * Adds `value` to `set`.
+ *
+ * @private
+ * @param {Object} set The set to modify.
+ * @param {*} value The value to add.
+ * @returns {Object} Returns `set`.
+ */
+function addSetEntry(set, value) {
+  set.add(value);
+  return set;
+}
+
+/**
+ * A specialized version of `_.forEach` for arrays without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns `array`.
+ */
+function arrayEach(array, iteratee) {
+  var index = -1,
+      length = array.length;
+
+  while (++index < length) {
+    if (iteratee(array[index], index, array) === false) {
+      break;
+    }
+  }
+  return array;
+}
+
+/**
+ * A specialized version of `_.reduce` for arrays without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {*} [accumulator] The initial value.
+ * @param {boolean} [initAccum] Specify using the first element of `array` as the initial value.
+ * @returns {*} Returns the accumulated value.
+ */
+function arrayReduce(array, iteratee, accumulator, initAccum) {
+  var index = -1,
+      length = array.length;
+
+  if (initAccum && length) {
+    accumulator = array[++index];
+  }
+  while (++index < length) {
+    accumulator = iteratee(accumulator, array[index], index, array);
+  }
+  return accumulator;
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * Checks if `value` is a global object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {null|Object} Returns `value` if it's a global object, else `null`.
+ */
+function checkGlobal(value) {
+  return (value && value.Object === Object) ? value : null;
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  value = (typeof value == 'number' || reIsUint.test(value)) ? +value : -1;
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return value > -1 && value % 1 == 0 && value < length;
+}
+
+/**
+ * Converts `map` to an array.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the converted array.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Converts `set` to an array.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the converted array.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Buffer = moduleExports ? root.Buffer : undefined,
+    Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    getPrototypeOf = Object.getPrototypeOf,
+    getOwnPropertySymbols = Object.getOwnPropertySymbols,
+    objectCreate = Object.create,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var mapCtorString = Map ? funcToString.call(Map) : '',
+    setCtorString = Set ? funcToString.call(Set) : '',
+    weakMapCtorString = WeakMap ? funcToString.call(WeakMap) : '';
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = Symbol ? symbolProto.valueOf : undefined;
+
+/**
+ * Creates an hash object.
+ *
+ * @private
+ * @constructor
+ * @returns {Object} Returns the new hash object.
+ */
+function Hash() {}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(hash, key) {
+  return hashHas(hash, key) && delete hash[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @param {Object} hash The hash to query.
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(hash, key) {
+  if (nativeCreate) {
+    var result = hash[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(hash, key) ? hash[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @param {Object} hash The hash to query.
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(hash, key) {
+  return nativeCreate ? hash[key] !== undefined : hasOwnProperty.call(hash, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ */
+function hashSet(hash, key, value) {
+  hash[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+}
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function MapCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = values[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': Map ? new Map : [],
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapDelete(key) {
+  var data = this.__data__;
+  if (isKeyable(key)) {
+    return hashDelete(typeof key == 'string' ? data.string : data.hash, key);
+  }
+  return Map ? data.map['delete'](key) : assocDelete(data.map, key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapGet(key) {
+  var data = this.__data__;
+  if (isKeyable(key)) {
+    return hashGet(typeof key == 'string' ? data.string : data.hash, key);
+  }
+  return Map ? data.map.get(key) : assocGet(data.map, key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapHas(key) {
+  var data = this.__data__;
+  if (isKeyable(key)) {
+    return hashHas(typeof key == 'string' ? data.string : data.hash, key);
+  }
+  return Map ? data.map.has(key) : assocHas(data.map, key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache object.
+ */
+function mapSet(key, value) {
+  var data = this.__data__;
+  if (isKeyable(key)) {
+    hashSet(typeof key == 'string' ? data.string : data.hash, key, value);
+  } else if (Map) {
+    data.map.set(key, value);
+  } else {
+    assocSet(data.map, key, value);
+  }
+  return this;
+}
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function Stack(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = values[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = { 'array': [], 'map': null };
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  var data = this.__data__,
+      array = data.array;
+
+  return array ? assocDelete(array, key) : data.map['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  var data = this.__data__,
+      array = data.array;
+
+  return array ? assocGet(array, key) : data.map.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  var data = this.__data__,
+      array = data.array;
+
+  return array ? assocHas(array, key) : data.map.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache object.
+ */
+function stackSet(key, value) {
+  var data = this.__data__,
+      array = data.array;
+
+  if (array) {
+    if (array.length < (LARGE_ARRAY_SIZE - 1)) {
+      assocSet(array, key, value);
+    } else {
+      data.array = null;
+      data.map = new MapCache(array);
+    }
+  }
+  var map = data.map;
+  if (map) {
+    map.set(key, value);
+  }
+  return this;
+}
+
+/**
+ * Removes `key` and its value from the associative array.
+ *
+ * @private
+ * @param {Array} array The array to query.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function assocDelete(array, key) {
+  var index = assocIndexOf(array, key);
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = array.length - 1;
+  if (index == lastIndex) {
+    array.pop();
+  } else {
+    splice.call(array, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the associative array value for `key`.
+ *
+ * @private
+ * @param {Array} array The array to query.
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function assocGet(array, key) {
+  var index = assocIndexOf(array, key);
+  return index < 0 ? undefined : array[index][1];
+}
+
+/**
+ * Checks if an associative array value for `key` exists.
+ *
+ * @private
+ * @param {Array} array The array to query.
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function assocHas(array, key) {
+  return assocIndexOf(array, key) > -1;
+}
+
+/**
+ * Gets the index at which the first occurrence of `key` is found in `array`
+ * of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * Sets the associative array `key` to `value`.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ */
+function assocSet(array, key, value) {
+  var index = assocIndexOf(array, key);
+  if (index < 0) {
+    array.push([key, value]);
+  } else {
+    array[index][1] = value;
+  }
+}
+
+/**
+ * Assigns `value` to `key` of `object` if the existing value is not equivalent
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * for equality comparisons.
+ *
+ * @private
+ * @param {Object} object The object to modify.
+ * @param {string} key The key of the property to assign.
+ * @param {*} value The value to assign.
+ */
+function assignValue(object, key, value) {
+  var objValue = object[key];
+  if ((!eq(objValue, value) ||
+        (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) ||
+      (value === undefined && !(key in object))) {
+    object[key] = value;
+  }
+}
+
+/**
+ * The base implementation of `_.assign` without support for multiple sources
+ * or `customizer` functions.
+ *
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @returns {Object} Returns `object`.
+ */
+function baseAssign(object, source) {
+  return object && copyObject(source, keys(source), object);
+}
+
+/**
+ * The base implementation of `_.clone` and `_.cloneDeep` which tracks
+ * traversed objects.
+ *
+ * @private
+ * @param {*} value The value to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @param {Function} [customizer] The function to customize cloning.
+ * @param {string} [key] The key of `value`.
+ * @param {Object} [object] The parent object of `value`.
+ * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
+ * @returns {*} Returns the cloned value.
+ */
+function baseClone(value, isDeep, customizer, key, object, stack) {
+  var result;
+  if (customizer) {
+    result = object ? customizer(value, key, object, stack) : customizer(value);
+  }
+  if (result !== undefined) {
+    return result;
+  }
+  if (!isObject(value)) {
+    return value;
+  }
+  var isArr = isArray(value);
+  if (isArr) {
+    result = initCloneArray(value);
+    if (!isDeep) {
+      return copyArray(value, result);
+    }
+  } else {
+    var tag = getTag(value),
+        isFunc = tag == funcTag || tag == genTag;
+
+    if (isBuffer(value)) {
+      return cloneBuffer(value, isDeep);
+    }
+    if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
+      if (isHostObject(value)) {
+        return object ? value : {};
+      }
+      result = initCloneObject(isFunc ? {} : value);
+      if (!isDeep) {
+        return copySymbols(value, baseAssign(result, value));
+      }
+    } else {
+      if (!cloneableTags[tag]) {
+        return object ? value : {};
+      }
+      result = initCloneByTag(value, tag, isDeep);
+    }
+  }
+  // Check for circular references and return its corresponding clone.
+  stack || (stack = new Stack);
+  var stacked = stack.get(value);
+  if (stacked) {
+    return stacked;
+  }
+  stack.set(value, result);
+
+  // Recursively populate clone (susceptible to call stack limits).
+  (isArr ? arrayEach : baseForOwn)(value, function(subValue, key) {
+    assignValue(result, key, baseClone(subValue, isDeep, customizer, key, value, stack));
+  });
+  return isArr ? result : copySymbols(value, result);
+}
+
+/**
+ * The base implementation of `_.create` without support for assigning
+ * properties to the created object.
+ *
+ * @private
+ * @param {Object} prototype The object to inherit from.
+ * @returns {Object} Returns the new object.
+ */
+function baseCreate(proto) {
+  return isObject(proto) ? objectCreate(proto) : {};
+}
+
+/**
+ * The base implementation of `baseForIn` and `baseForOwn` which iterates
+ * over `object` properties returned by `keysFunc` invoking `iteratee` for
+ * each property. Iteratee functions may exit iteration early by explicitly
+ * returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
+
+/**
+ * The base implementation of `_.forOwn` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+function baseForOwn(object, iteratee) {
+  return object && baseFor(object, iteratee, keys);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return hasOwnProperty.call(object, key) ||
+    (typeof object == 'object' && key in object && getPrototypeOf(object) === null);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+function baseKeys(object) {
+  return nativeKeys(Object(object));
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * Creates a clone of  `buffer`.
+ *
+ * @private
+ * @param {Buffer} buffer The buffer to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Buffer} Returns the cloned buffer.
+ */
+function cloneBuffer(buffer, isDeep) {
+  if (isDeep) {
+    return buffer.slice();
+  }
+  var Ctor = buffer.constructor,
+      result = new Ctor(buffer.length);
+
+  buffer.copy(result);
+  return result;
+}
+
+/**
+ * Creates a clone of `arrayBuffer`.
+ *
+ * @private
+ * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
+ * @returns {ArrayBuffer} Returns the cloned array buffer.
+ */
+function cloneArrayBuffer(arrayBuffer) {
+  var Ctor = arrayBuffer.constructor,
+      result = new Ctor(arrayBuffer.byteLength),
+      view = new Uint8Array(result);
+
+  view.set(new Uint8Array(arrayBuffer));
+  return result;
+}
+
+/**
+ * Creates a clone of `map`.
+ *
+ * @private
+ * @param {Object} map The map to clone.
+ * @returns {Object} Returns the cloned map.
+ */
+function cloneMap(map) {
+  var Ctor = map.constructor;
+  return arrayReduce(mapToArray(map), addMapEntry, new Ctor);
+}
+
+/**
+ * Creates a clone of `regexp`.
+ *
+ * @private
+ * @param {Object} regexp The regexp to clone.
+ * @returns {Object} Returns the cloned regexp.
+ */
+function cloneRegExp(regexp) {
+  var Ctor = regexp.constructor,
+      result = new Ctor(regexp.source, reFlags.exec(regexp));
+
+  result.lastIndex = regexp.lastIndex;
+  return result;
+}
+
+/**
+ * Creates a clone of `set`.
+ *
+ * @private
+ * @param {Object} set The set to clone.
+ * @returns {Object} Returns the cloned set.
+ */
+function cloneSet(set) {
+  var Ctor = set.constructor;
+  return arrayReduce(setToArray(set), addSetEntry, new Ctor);
+}
+
+/**
+ * Creates a clone of the `symbol` object.
+ *
+ * @private
+ * @param {Object} symbol The symbol object to clone.
+ * @returns {Object} Returns the cloned symbol object.
+ */
+function cloneSymbol(symbol) {
+  return Symbol ? Object(symbolValueOf.call(symbol)) : {};
+}
+
+/**
+ * Creates a clone of `typedArray`.
+ *
+ * @private
+ * @param {Object} typedArray The typed array to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned typed array.
+ */
+function cloneTypedArray(typedArray, isDeep) {
+  var arrayBuffer = typedArray.buffer,
+      buffer = isDeep ? cloneArrayBuffer(arrayBuffer) : arrayBuffer,
+      Ctor = typedArray.constructor;
+
+  return new Ctor(buffer, typedArray.byteOffset, typedArray.length);
+}
+
+/**
+ * Copies the values of `source` to `array`.
+ *
+ * @private
+ * @param {Array} source The array to copy values from.
+ * @param {Array} [array=[]] The array to copy values to.
+ * @returns {Array} Returns `array`.
+ */
+function copyArray(source, array) {
+  var index = -1,
+      length = source.length;
+
+  array || (array = Array(length));
+  while (++index < length) {
+    array[index] = source[index];
+  }
+  return array;
+}
+
+/**
+ * Copies properties of `source` to `object`.
+ *
+ * @private
+ * @param {Object} source The object to copy properties from.
+ * @param {Array} props The property names to copy.
+ * @param {Object} [object={}] The object to copy properties to.
+ * @returns {Object} Returns `object`.
+ */
+function copyObject(source, props, object) {
+  return copyObjectWith(source, props, object);
+}
+
+/**
+ * This function is like `copyObject` except that it accepts a function to
+ * customize copied values.
+ *
+ * @private
+ * @param {Object} source The object to copy properties from.
+ * @param {Array} props The property names to copy.
+ * @param {Object} [object={}] The object to copy properties to.
+ * @param {Function} [customizer] The function to customize copied values.
+ * @returns {Object} Returns `object`.
+ */
+function copyObjectWith(source, props, object, customizer) {
+  object || (object = {});
+
+  var index = -1,
+      length = props.length;
+
+  while (++index < length) {
+    var key = props[index];
+
+    var newValue = customizer
+      ? customizer(object[key], source[key], key, object, source)
+      : source[key];
+
+    assignValue(object, key, newValue);
+  }
+  return object;
+}
+
+/**
+ * Copies own symbol properties of `source` to `object`.
+ *
+ * @private
+ * @param {Object} source The object to copy symbols from.
+ * @param {Object} [object={}] The object to copy symbols to.
+ * @returns {Object} Returns `object`.
+ */
+function copySymbols(source, object) {
+  return copyObject(source, getSymbols(source), object);
+}
+
+/**
+ * Creates a base function for methods like `_.forIn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792)
+ * that affects Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = object == null ? undefined : object[key];
+  return isNative(value) ? value : undefined;
+}
+
+/**
+ * Creates an array of the own symbol properties of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of symbols.
+ */
+var getSymbols = getOwnPropertySymbols || function() {
+  return [];
+};
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function getTag(value) {
+  return objectToString.call(value);
+}
+
+// Fallback for IE 11 providing `toStringTag` values for maps, sets, and weakmaps.
+if ((Map && getTag(new Map) != mapTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : null,
+        ctorString = typeof Ctor == 'function' ? funcToString.call(Ctor) : '';
+
+    if (ctorString) {
+      switch (ctorString) {
+        case mapCtorString: return mapTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Initializes an array clone.
+ *
+ * @private
+ * @param {Array} array The array to clone.
+ * @returns {Array} Returns the initialized clone.
+ */
+function initCloneArray(array) {
+  var length = array.length,
+      result = array.constructor(length);
+
+  // Add properties assigned by `RegExp#exec`.
+  if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
+    result.index = array.index;
+    result.input = array.input;
+  }
+  return result;
+}
+
+/**
+ * Initializes an object clone.
+ *
+ * @private
+ * @param {Object} object The object to clone.
+ * @returns {Object} Returns the initialized clone.
+ */
+function initCloneObject(object) {
+  if (isPrototype(object)) {
+    return {};
+  }
+  var Ctor = object.constructor;
+  return baseCreate(isFunction(Ctor) ? Ctor.prototype : undefined);
+}
+
+/**
+ * Initializes an object clone based on its `toStringTag`.
+ *
+ * **Note:** This function only supports cloning values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to clone.
+ * @param {string} tag The `toStringTag` of the object to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the initialized clone.
+ */
+function initCloneByTag(object, tag, isDeep) {
+  var Ctor = object.constructor;
+  switch (tag) {
+    case arrayBufferTag:
+      return cloneArrayBuffer(object);
+
+    case boolTag:
+    case dateTag:
+      return new Ctor(+object);
+
+    case float32Tag: case float64Tag:
+    case int8Tag: case int16Tag: case int32Tag:
+    case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
+      return cloneTypedArray(object, isDeep);
+
+    case mapTag:
+      return cloneMap(object);
+
+    case numberTag:
+    case stringTag:
+      return new Ctor(object);
+
+    case regexpTag:
+      return cloneRegExp(object);
+
+    case setTag:
+      return cloneSet(object);
+
+    case symbolTag:
+      return cloneSymbol(object);
+  }
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return type == 'number' || type == 'boolean' ||
+    (type == 'string' && value != '__proto__') || value == null;
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Performs a [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'user': 'fred' };
+ * var other = { 'user': 'fred' };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @type {Function}
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null &&
+    !(typeof value == 'function' && isFunction(value)) && isLength(getLength(value));
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object, else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is a buffer.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
+ * @example
+ *
+ * _.isBuffer(new Buffer(2));
+ * // => true
+ *
+ * _.isBuffer(new Uint8Array(2));
+ * // => false
+ */
+var isBuffer = !Buffer ? constant(false) : function(value) {
+  return value instanceof Buffer;
+};
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array constructors, and
+  // PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the [language type](https://es5.github.io/#x8) of `Object`.
+ * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is a native function.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function, else `false`.
+ * @example
+ *
+ * _.isNative(Array.prototype.push);
+ * // => true
+ *
+ * _.isNative(_);
+ * // => false
+ */
+function isNative(value) {
+  if (value == null) {
+    return false;
+  }
+  if (isFunction(value)) {
+    return reIsNative.test(funcToString.call(value));
+  }
+  return isObjectLike(value) &&
+    (isHostObject(value) ? reIsNative : reIsHostCtor).test(value);
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * Creates a function that returns `value`.
+ *
+ * @static
+ * @memberOf _
+ * @category Util
+ * @param {*} value The value to return from the new function.
+ * @returns {Function} Returns the new function.
+ * @example
+ *
+ * var object = { 'user': 'fred' };
+ * var getter = _.constant(object);
+ *
+ * getter() === object;
+ * // => true
+ */
+function constant(value) {
+  return function() {
+    return value;
+  };
+}
+
+// Avoid inheriting from `Object.prototype` when possible.
+Hash.prototype = nativeCreate ? nativeCreate(null) : objectProto;
+
+// Add functions to the `MapCache`.
+MapCache.prototype.clear = mapClear;
+MapCache.prototype['delete'] = mapDelete;
+MapCache.prototype.get = mapGet;
+MapCache.prototype.has = mapHas;
+MapCache.prototype.set = mapSet;
+
+// Add functions to the `Stack` cache.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+module.exports = baseClone;
diff --git a/lodash._baseclone/package.json b/lodash._baseclone/package.json
new file mode 100644
index 000000000..1e9d711a8
--- /dev/null
+++ b/lodash._baseclone/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "lodash._baseclone",
+  "version": "4.5.0",
+  "description": "The internal lodash function `baseClone` exported as a module.",
+  "homepage": "https://lodash.com/",
+  "icon": "https://lodash.com/icon.svg",
+  "license": "MIT",
+  "author": "John-David Dalton <john.david.dalton@gmail.com> (http://allyoucanleet.com/)",
+  "contributors": [
+    "John-David Dalton <john.david.dalton@gmail.com> (http://allyoucanleet.com/)",
+    "Blaine Bublitz <blaine@iceddev.com> (https://github.com/phated)",
+    "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
+  ],
+  "repository": "lodash/lodash",
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
+}
diff --git a/lodash._basedifference/LICENSE b/lodash._basedifference/LICENSE
index bcbe13d67..e0c69d560 100644
--- a/lodash._basedifference/LICENSE
+++ b/lodash._basedifference/LICENSE
@@ -1,23 +1,47 @@
-The MIT License (MIT)
+Copyright jQuery Foundation and other contributors <https://jquery.org/>
 
-Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
-Based on Underscore.js, copyright 2009-2016 Jeremy Ashkenas,
+Based on Underscore.js, copyright Jeremy Ashkenas,
 DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
+This software consists of voluntary contributions made by many
+individuals. For exact contribution history, see the revision history
+available at https://github.com/lodash/lodash
 
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
+The following license applies to all parts of this software except as
+documented below:
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+====
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+====
+
+Copyright and related rights for sample code are waived via CC0. Sample
+code is defined as all source code displayed within the prose of the
+documentation.
+
+CC0: http://creativecommons.org/publicdomain/zero/1.0/
+
+====
+
+Files located in the node_modules and vendor directories are externally
+maintained libraries used by this software which have their own
+licenses; we recommend you read them, as their terms may differ from the
+terms above.
diff --git a/lodash._basedifference/README.md b/lodash._basedifference/README.md
index 0ff2f1660..7426607e9 100644
--- a/lodash._basedifference/README.md
+++ b/lodash._basedifference/README.md
@@ -1,4 +1,4 @@
-# lodash._basedifference v4.4.1
+# lodash._basedifference v4.5.0
 
 The internal [lodash](https://lodash.com/) function `baseDifference` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var baseDifference = require('lodash._basedifference');
 ```
 
-See the [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash._basedifference) for more details.
+See the [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash._basedifference) for more details.
diff --git a/lodash._basedifference/index.js b/lodash._basedifference/index.js
index b36d67226..39b916c9b 100644
--- a/lodash._basedifference/index.js
+++ b/lodash._basedifference/index.js
@@ -1,12 +1,12 @@
 /**
- * lodash 4.4.1 (Custom Build) <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
- * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
+ * Copyright jQuery Foundation and other contributors <https://jquery.org/>
+ * Released under MIT license <https://lodash.com/license>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
- * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
- * Available under MIT license <https://lodash.com/license>
+ * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var SetCache = require('lodash._setcache');
+var root = require('lodash._root');
 
 /** Used as the size to enable large array optimizations. */
 var LARGE_ARRAY_SIZE = 200;
@@ -14,6 +14,19 @@ var LARGE_ARRAY_SIZE = 200;
 /** Used to stand-in for `undefined` hash values. */
 var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
+/** `Object#toString` result references. */
+var funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]';
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
 /**
  * A specialized version of `_.includes` for arrays without support for
  * specifying an index to search from.
@@ -97,7 +110,7 @@ function baseIndexOf(array, value, fromIndex) {
  *
  * @private
  * @param {Function} func The function to cap arguments for.
- * @returns {Function} Returns the new function.
+ * @returns {Function} Returns the new capped function.
  */
 function baseUnary(func) {
   return function(value) {
@@ -105,6 +118,18 @@ function baseUnary(func) {
   };
 }
 
+/**
+ * Checks if a cache value for `key` exists.
+ *
+ * @private
+ * @param {Object} cache The cache to query.
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function cacheHas(cache, key) {
+  return cache.has(key);
+}
+
 /**
  * Gets the index at which the first occurrence of `NaN` is found in `array`.
  *
@@ -128,22 +153,424 @@ function indexOfNaN(array, fromIndex, fromRight) {
 }
 
 /**
- * Checks if `value` is in `cache`.
+ * Checks if `value` is a host object in IE < 9.
  *
  * @private
- * @param {Object} cache The set cache to search.
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var splice = arrayProto.splice;
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    nativeCreate = getNative(Object, 'create');
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
  * @param {*} value The value to search for.
  * @returns {number} Returns `true` if `value` is found, else `false`.
  */
-function cacheHas(cache, value) {
-  var map = cache.__data__;
-  if (isKeyable(value)) {
-    var data = map.__data__,
-        hash = typeof value == 'string' ? data.string : data.hash;
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
 
-    return hash[value] === HASH_UNDEFINED;
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
   }
-  return map.has(value);
+  return -1;
 }
 
 /**
@@ -185,6 +612,7 @@ function baseDifference(array, values, iteratee, comparator) {
     var value = array[index],
         computed = iteratee ? iteratee(value) : value;
 
+    value = (comparator || value !== 0) ? value : 0;
     if (isCommon && computed === computed) {
       var valuesIndex = valuesLength;
       while (valuesIndex--) {
@@ -201,6 +629,34 @@ function baseDifference(array, values, iteratee, comparator) {
   return result;
 }
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = object[key];
+  return isNative(value) ? value : undefined;
+}
+
 /**
  * Checks if `value` is suitable for use as unique object key.
  *
@@ -210,8 +666,146 @@ function baseDifference(array, values, iteratee, comparator) {
  */
 function isKeyable(value) {
   var type = typeof value;
-  return type == 'number' || type == 'boolean' ||
-    (type == 'string' && value != '__proto__') || value == null;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'user': 'fred' };
+ * var other = { 'user': 'fred' };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified,
+ *  else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is a native function.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ * @example
+ *
+ * _.isNative(Array.prototype.push);
+ * // => true
+ *
+ * _.isNative(_);
+ * // => false
+ */
+function isNative(value) {
+  if (!isObject(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
 }
 
 module.exports = baseDifference;
diff --git a/lodash._basedifference/package.json b/lodash._basedifference/package.json
index cb537ecbe..0acc13df3 100644
--- a/lodash._basedifference/package.json
+++ b/lodash._basedifference/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash._basedifference",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The internal lodash function `baseDifference` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -14,6 +14,6 @@
   "repository": "lodash/lodash",
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
-    "lodash._setcache": "~4.1.0"
+    "lodash._root": "~3.0.0"
   }
 }
diff --git a/lodash._baseintersection/LICENSE b/lodash._baseintersection/LICENSE
index bcbe13d67..e0c69d560 100644
--- a/lodash._baseintersection/LICENSE
+++ b/lodash._baseintersection/LICENSE
@@ -1,23 +1,47 @@
-The MIT License (MIT)
+Copyright jQuery Foundation and other contributors <https://jquery.org/>
 
-Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
-Based on Underscore.js, copyright 2009-2016 Jeremy Ashkenas,
+Based on Underscore.js, copyright Jeremy Ashkenas,
 DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
+This software consists of voluntary contributions made by many
+individuals. For exact contribution history, see the revision history
+available at https://github.com/lodash/lodash
 
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
+The following license applies to all parts of this software except as
+documented below:
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+====
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+====
+
+Copyright and related rights for sample code are waived via CC0. Sample
+code is defined as all source code displayed within the prose of the
+documentation.
+
+CC0: http://creativecommons.org/publicdomain/zero/1.0/
+
+====
+
+Files located in the node_modules and vendor directories are externally
+maintained libraries used by this software which have their own
+licenses; we recommend you read them, as their terms may differ from the
+terms above.
diff --git a/lodash._baseintersection/README.md b/lodash._baseintersection/README.md
index 282cd7b2d..da9fac953 100644
--- a/lodash._baseintersection/README.md
+++ b/lodash._baseintersection/README.md
@@ -1,4 +1,4 @@
-# lodash._baseintersection v4.4.2
+# lodash._baseintersection v4.5.0
 
 The internal [lodash](https://lodash.com/) function `baseIntersection` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var baseIntersection = require('lodash._baseintersection');
 ```
 
-See the [package source](https://github.com/lodash/lodash/blob/4.4.2-npm-packages/lodash._baseintersection) for more details.
+See the [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash._baseintersection) for more details.
diff --git a/lodash._baseintersection/index.js b/lodash._baseintersection/index.js
index 32854ab11..7c6e7c06b 100644
--- a/lodash._baseintersection/index.js
+++ b/lodash._baseintersection/index.js
@@ -1,16 +1,29 @@
 /**
- * lodash 4.4.2 (Custom Build) <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
- * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
+ * Copyright jQuery Foundation and other contributors <https://jquery.org/>
+ * Released under MIT license <https://lodash.com/license>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
- * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
- * Available under MIT license <https://lodash.com/license>
+ * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var SetCache = require('lodash._setcache');
+var root = require('lodash._root');
 
 /** Used to stand-in for `undefined` hash values. */
 var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
+/** `Object#toString` result references. */
+var funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]';
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
 /**
  * A specialized version of `_.includes` for arrays without support for
  * specifying an index to search from.
@@ -94,7 +107,7 @@ function baseIndexOf(array, value, fromIndex) {
  *
  * @private
  * @param {Function} func The function to cap arguments for.
- * @returns {Function} Returns the new function.
+ * @returns {Function} Returns the new capped function.
  */
 function baseUnary(func) {
   return function(value) {
@@ -102,6 +115,18 @@ function baseUnary(func) {
   };
 }
 
+/**
+ * Checks if a cache value for `key` exists.
+ *
+ * @private
+ * @param {Object} cache The cache to query.
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function cacheHas(cache, key) {
+  return cache.has(key);
+}
+
 /**
  * Gets the index at which the first occurrence of `NaN` is found in `array`.
  *
@@ -124,26 +149,428 @@ function indexOfNaN(array, fromIndex, fromRight) {
   return -1;
 }
 
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var splice = arrayProto.splice;
+
 /* Built-in method references for those with the same name as other `lodash` methods. */
 var nativeMin = Math.min;
 
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    nativeCreate = getNative(Object, 'create');
+
 /**
- * Checks if `value` is in `cache`.
+ * Creates a hash object.
  *
  * @private
- * @param {Object} cache The set cache to search.
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
  * @param {*} value The value to search for.
  * @returns {number} Returns `true` if `value` is found, else `false`.
  */
-function cacheHas(cache, value) {
-  var map = cache.__data__;
-  if (isKeyable(value)) {
-    var data = map.__data__,
-        hash = typeof value == 'string' ? data.string : data.hash;
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
 
-    return hash[value] === HASH_UNDEFINED;
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
   }
-  return map.has(value);
+  return -1;
 }
 
 /**
@@ -185,6 +612,7 @@ function baseIntersection(arrays, iteratee, comparator) {
     var value = array[index],
         computed = iteratee ? iteratee(value) : value;
 
+    value = (comparator || value !== 0) ? value : 0;
     if (!(seen
           ? cacheHas(seen, computed)
           : includes(result, computed, comparator)
@@ -208,6 +636,34 @@ function baseIntersection(arrays, iteratee, comparator) {
   return result;
 }
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = object[key];
+  return isNative(value) ? value : undefined;
+}
+
 /**
  * Checks if `value` is suitable for use as unique object key.
  *
@@ -217,8 +673,146 @@ function baseIntersection(arrays, iteratee, comparator) {
  */
 function isKeyable(value) {
   var type = typeof value;
-  return type == 'number' || type == 'boolean' ||
-    (type == 'string' && value != '__proto__') || value == null;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'user': 'fred' };
+ * var other = { 'user': 'fred' };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified,
+ *  else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is a native function.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ * @example
+ *
+ * _.isNative(Array.prototype.push);
+ * // => true
+ *
+ * _.isNative(_);
+ * // => false
+ */
+function isNative(value) {
+  if (!isObject(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
 }
 
 module.exports = baseIntersection;
diff --git a/lodash._baseintersection/package.json b/lodash._baseintersection/package.json
index f586f0380..94014c445 100644
--- a/lodash._baseintersection/package.json
+++ b/lodash._baseintersection/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash._baseintersection",
-  "version": "4.4.2",
+  "version": "4.5.0",
   "description": "The internal lodash function `baseIntersection` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -14,6 +14,6 @@
   "repository": "lodash/lodash",
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
-    "lodash._setcache": "~4.1.0"
+    "lodash._root": "~3.0.0"
   }
 }
diff --git a/lodash._baseiteratee/README.md b/lodash._baseiteratee/README.md
index c26cbd316..cd9d32fc6 100644
--- a/lodash._baseiteratee/README.md
+++ b/lodash._baseiteratee/README.md
@@ -1,4 +1,4 @@
-# lodash._baseiteratee v4.4.0
+# lodash._baseiteratee v4.5.0
 
 The internal [lodash](https://lodash.com/) function `baseIteratee` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var baseIteratee = require('lodash._baseiteratee');
 ```
 
-See the [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash._baseiteratee) for more details.
+See the [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash._baseiteratee) for more details.
diff --git a/lodash._baseiteratee/index.js b/lodash._baseiteratee/index.js
index a4947b718..ebf2bb479 100644
--- a/lodash._baseiteratee/index.js
+++ b/lodash._baseiteratee/index.js
@@ -1,22 +1,25 @@
 /**
- * lodash 4.4.0 (Custom Build) <https://lodash.com/>
+ * lodash 4.5.0 (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
  * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  * Available under MIT license <https://lodash.com/license>
  */
-var Stack = require('lodash._stack'),
-    baseSlice = require('lodash._baseslice'),
-    root = require('lodash._root'),
-    toString = require('lodash.tostring');
 
 /** Used to compose bitmasks for comparison styles. */
 var UNORDERED_COMPARE_FLAG = 1,
     PARTIAL_COMPARE_FLAG = 2;
 
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
 /** Used as references for various `Number` constants. */
-var MAX_SAFE_INTEGER = 9007199254740991;
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
 var argsTag = '[object Arguments]',
@@ -78,6 +81,44 @@ typedArrayTags[numberTag] = typedArrayTags[objectTag] =
 typedArrayTags[regexpTag] = typedArrayTags[setTag] =
 typedArrayTags[stringTag] = typedArrayTags[weakMapTag] = false;
 
+/** Used to determine if values are of the language type `Object`. */
+var objectTypes = {
+  'function': true,
+  'object': true
+};
+
+/** Detect free variable `exports`. */
+var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType)
+  ? exports
+  : undefined;
+
+/** Detect free variable `module`. */
+var freeModule = (objectTypes[typeof module] && module && !module.nodeType)
+  ? module
+  : undefined;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = checkGlobal(freeExports && freeModule && typeof global == 'object' && global);
+
+/** Detect free variable `self`. */
+var freeSelf = checkGlobal(objectTypes[typeof self] && self);
+
+/** Detect free variable `window`. */
+var freeWindow = checkGlobal(objectTypes[typeof window] && window);
+
+/** Detect `this` as the global object. */
+var thisGlobal = checkGlobal(objectTypes[typeof this] && this);
+
+/**
+ * Used as a reference to the global object.
+ *
+ * The `this` value is used if it's the global object to avoid Greasemonkey's
+ * restricted `window` object, otherwise the `window` object is used.
+ */
+var root = freeGlobal ||
+  ((freeWindow !== (thisGlobal && thisGlobal.window)) && freeWindow) ||
+    freeSelf || thisGlobal || Function('return this')();
+
 /**
  * A specialized version of `_.map` for arrays without support for iteratee
  * shorthands.
@@ -153,6 +194,17 @@ function baseToPairs(object, props) {
   });
 }
 
+/**
+ * Checks if `value` is a global object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {null|Object} Returns `value` if it's a global object, else `null`.
+ */
+function checkGlobal(value) {
+  return (value && value.Object === Object) ? value : null;
+}
+
 /**
  * Checks if `value` is a host object in IE < 9.
  *
@@ -221,7 +273,8 @@ function setToArray(set) {
 }
 
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
 
 /** Used to resolve the decompiled source of functions. */
 var funcToString = Function.prototype.toString;
@@ -245,7 +298,8 @@ var reIsNative = RegExp('^' +
 var Symbol = root.Symbol,
     Uint8Array = root.Uint8Array,
     getPrototypeOf = Object.getPrototypeOf,
-    propertyIsEnumerable = objectProto.propertyIsEnumerable;
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
 var nativeKeys = Object.keys;
@@ -253,7 +307,8 @@ var nativeKeys = Object.keys;
 /* Built-in method references that are verified to be native. */
 var Map = getNative(root, 'Map'),
     Set = getNative(root, 'Set'),
-    WeakMap = getNative(root, 'WeakMap');
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
 
 /** Used to detect maps, sets, and weakmaps. */
 var mapCtorString = Map ? funcToString.call(Map) : '',
@@ -262,7 +317,364 @@ var mapCtorString = Map ? funcToString.call(Map) : '',
 
 /** Used to convert symbols to primitives and strings. */
 var symbolProto = Symbol ? Symbol.prototype : undefined,
-    symbolValueOf = Symbol ? symbolProto.valueOf : undefined;
+    symbolValueOf = Symbol ? symbolProto.valueOf : undefined,
+    symbolToString = Symbol ? symbolProto.toString : undefined;
+
+/**
+ * Creates an hash object.
+ *
+ * @private
+ * @constructor
+ * @returns {Object} Returns the new hash object.
+ */
+function Hash() {}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(hash, key) {
+  return hashHas(hash, key) && delete hash[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @param {Object} hash The hash to query.
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(hash, key) {
+  if (nativeCreate) {
+    var result = hash[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(hash, key) ? hash[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @param {Object} hash The hash to query.
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(hash, key) {
+  return nativeCreate ? hash[key] !== undefined : hasOwnProperty.call(hash, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ */
+function hashSet(hash, key, value) {
+  hash[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+}
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function MapCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = values[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': Map ? new Map : [],
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapDelete(key) {
+  var data = this.__data__;
+  if (isKeyable(key)) {
+    return hashDelete(typeof key == 'string' ? data.string : data.hash, key);
+  }
+  return Map ? data.map['delete'](key) : assocDelete(data.map, key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapGet(key) {
+  var data = this.__data__;
+  if (isKeyable(key)) {
+    return hashGet(typeof key == 'string' ? data.string : data.hash, key);
+  }
+  return Map ? data.map.get(key) : assocGet(data.map, key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapHas(key) {
+  var data = this.__data__;
+  if (isKeyable(key)) {
+    return hashHas(typeof key == 'string' ? data.string : data.hash, key);
+  }
+  return Map ? data.map.has(key) : assocHas(data.map, key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache object.
+ */
+function mapSet(key, value) {
+  var data = this.__data__;
+  if (isKeyable(key)) {
+    hashSet(typeof key == 'string' ? data.string : data.hash, key, value);
+  } else if (Map) {
+    data.map.set(key, value);
+  } else {
+    assocSet(data.map, key, value);
+  }
+  return this;
+}
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function Stack(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = values[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = { 'array': [], 'map': null };
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  var data = this.__data__,
+      array = data.array;
+
+  return array ? assocDelete(array, key) : data.map['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  var data = this.__data__,
+      array = data.array;
+
+  return array ? assocGet(array, key) : data.map.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  var data = this.__data__,
+      array = data.array;
+
+  return array ? assocHas(array, key) : data.map.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache object.
+ */
+function stackSet(key, value) {
+  var data = this.__data__,
+      array = data.array;
+
+  if (array) {
+    if (array.length < (LARGE_ARRAY_SIZE - 1)) {
+      assocSet(array, key, value);
+    } else {
+      data.array = null;
+      data.map = new MapCache(array);
+    }
+  }
+  var map = data.map;
+  if (map) {
+    map.set(key, value);
+  }
+  return this;
+}
+
+/**
+ * Removes `key` and its value from the associative array.
+ *
+ * @private
+ * @param {Array} array The array to query.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function assocDelete(array, key) {
+  var index = assocIndexOf(array, key);
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = array.length - 1;
+  if (index == lastIndex) {
+    array.pop();
+  } else {
+    splice.call(array, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the associative array value for `key`.
+ *
+ * @private
+ * @param {Array} array The array to query.
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function assocGet(array, key) {
+  var index = assocIndexOf(array, key);
+  return index < 0 ? undefined : array[index][1];
+}
+
+/**
+ * Checks if an associative array value for `key` exists.
+ *
+ * @private
+ * @param {Array} array The array to query.
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function assocHas(array, key) {
+  return assocIndexOf(array, key) > -1;
+}
+
+/**
+ * Gets the index at which the first occurrence of `key` is found in `array`
+ * of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * Sets the associative array `key` to `value`.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ */
+function assocSet(array, key, value) {
+  var index = assocIndexOf(array, key);
+  if (index < 0) {
+    array.push([key, value]);
+  } else {
+    array[index][1] = value;
+  }
+}
 
 /**
  * Casts `value` to a path array if it's not one.
@@ -564,6 +976,36 @@ function basePropertyDeep(path) {
   };
 }
 
+/**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+function baseSlice(array, start, end) {
+  var index = -1,
+      length = array.length;
+
+  if (start < 0) {
+    start = -start > length ? 0 : (length + start);
+  }
+  end = end > length ? length : end;
+  if (end < 0) {
+    end += length;
+  }
+  length = start > end ? 0 : ((end - start) >>> 0);
+  start >>>= 0;
+
+  var result = Array(length);
+  while (++index < length) {
+    result[index] = array[index + start];
+  }
+  return result;
+}
+
 /**
  * A specialized version of `baseIsEqualDeep` for arrays with support for
  * partial deep comparisons.
@@ -901,6 +1343,19 @@ function isKey(value, object) {
       (object != null && value in Object(object)));
 }
 
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return type == 'number' || type == 'boolean' ||
+    (type == 'string' && value != '__proto__') || value == null;
+}
+
 /**
  * Checks if `value` is likely a prototype object.
  *
@@ -972,6 +1427,40 @@ function last(array) {
   return length ? array[length - 1] : undefined;
 }
 
+/**
+ * Performs a [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'user': 'fred' };
+ * var other = { 'user': 'fred' };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
 /**
  * Checks if `value` is likely an `arguments` object.
  *
@@ -1231,6 +1720,27 @@ function isString(value) {
     (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
 }
 
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
 /**
  * Checks if `value` is classified as a typed array.
  *
@@ -1252,6 +1762,41 @@ function isTypedArray(value) {
     isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
 }
 
+/**
+ * Converts `value` to a string if it's not one. An empty string is returned
+ * for `null` and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (value == null) {
+    return '';
+  }
+  if (isSymbol(value)) {
+    return Symbol ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Gets the value at `path` of `object`. If the resolved value is
  * `undefined` the `defaultValue` is used in its place.
@@ -1426,4 +1971,21 @@ function property(path) {
   return isKey(path) ? baseProperty(path) : basePropertyDeep(path);
 }
 
+// Avoid inheriting from `Object.prototype` when possible.
+Hash.prototype = nativeCreate ? nativeCreate(null) : objectProto;
+
+// Add functions to the `MapCache`.
+MapCache.prototype.clear = mapClear;
+MapCache.prototype['delete'] = mapDelete;
+MapCache.prototype.get = mapGet;
+MapCache.prototype.has = mapHas;
+MapCache.prototype.set = mapSet;
+
+// Add functions to the `Stack` cache.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
 module.exports = baseIteratee;
diff --git a/lodash._baseiteratee/package.json b/lodash._baseiteratee/package.json
index c0a52bdf1..f758f2194 100644
--- a/lodash._baseiteratee/package.json
+++ b/lodash._baseiteratee/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash._baseiteratee",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The internal lodash function `baseIteratee` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -12,11 +12,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseslice": "^4.0.0",
-    "lodash._root": "^3.0.0",
-    "lodash._stack": "^4.0.0",
-    "lodash.tostring": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash._baseuniq/README.md b/lodash._baseuniq/README.md
index 929974e7b..5e73270f9 100644
--- a/lodash._baseuniq/README.md
+++ b/lodash._baseuniq/README.md
@@ -1,4 +1,4 @@
-# lodash._baseuniq v4.4.0
+# lodash._baseuniq v4.5.0
 
 The internal [lodash](https://lodash.com/) function `baseUniq` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var baseUniq = require('lodash._baseuniq');
 ```
 
-See the [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash._baseuniq) for more details.
+See the [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash._baseuniq) for more details.
diff --git a/lodash._baseuniq/index.js b/lodash._baseuniq/index.js
index 7ff50142a..ffd88f536 100644
--- a/lodash._baseuniq/index.js
+++ b/lodash._baseuniq/index.js
@@ -1,5 +1,5 @@
 /**
- * lodash 4.4.0 (Custom Build) <https://lodash.com/>
+ * lodash 4.5.0 (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
  * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
@@ -7,7 +7,7 @@
  * Available under MIT license <https://lodash.com/license>
  */
 var SetCache = require('lodash._setcache'),
-    root = require('lodash._root');
+    createSet = require('lodash._createset');
 
 /** Used as the size to enable large array optimizations. */
 var LARGE_ARRAY_SIZE = 200;
@@ -15,16 +15,6 @@ var LARGE_ARRAY_SIZE = 200;
 /** Used to stand-in for `undefined` hash values. */
 var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
-/** `Object#toString` result references. */
-var funcTag = '[object Function]',
-    genTag = '[object GeneratorFunction]';
-
-/** Used to match `RegExp` [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns). */
-var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
-
-/** Used to detect host constructors (Safari > 5). */
-var reIsHostCtor = /^\[object .+?Constructor\]$/;
-
 /**
  * A specialized version of `_.includes` for arrays without support for
  * specifying an index to search from.
@@ -39,8 +29,7 @@ function arrayIncludes(array, value) {
 }
 
 /**
- * A specialized version of `_.includesWith` for arrays without support for
- * specifying an index to search from.
+ * This function is like `arrayIncludes` except that it accepts a comparator.
  *
  * @private
  * @param {Array} array The array to search.
@@ -106,25 +95,6 @@ function indexOfNaN(array, fromIndex, fromRight) {
   return -1;
 }
 
-/**
- * Checks if `value` is a host object in IE < 9.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
- */
-function isHostObject(value) {
-  // Many host objects are `Object` objects that can coerce to strings
-  // despite having improperly defined `toString` methods.
-  var result = false;
-  if (value != null && typeof value.toString != 'function') {
-    try {
-      result = !!(value + '');
-    } catch (e) {}
-  }
-  return result;
-}
-
 /**
  * Converts `set` to an array.
  *
@@ -142,30 +112,6 @@ function setToArray(set) {
   return result;
 }
 
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
-
-/** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
-
-/** Used to check objects for own properties. */
-var hasOwnProperty = objectProto.hasOwnProperty;
-
-/**
- * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
- * of values.
- */
-var objectToString = objectProto.toString;
-
-/** Used to detect if a method is native. */
-var reIsNative = RegExp('^' +
-  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
-  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
-);
-
-/* Built-in method references that are verified to be native. */
-var Set = getNative(root, 'Set');
-
 /**
  * Checks if `value` is in `cache`.
  *
@@ -245,30 +191,6 @@ function baseUniq(array, iteratee, comparator) {
   return result;
 }
 
-/**
- * Creates a set of `values`.
- *
- * @private
- * @param {Array} values The values to add to the set.
- * @returns {Object} Returns the new set.
- */
-var createSet = !(Set && new Set([1, 2]).size === 2) ? noop : function(values) {
-  return new Set(values);
-};
-
-/**
- * Gets the native function at `key` of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {string} key The key of the method to get.
- * @returns {*} Returns the function if it's native, else `undefined`.
- */
-function getNative(object, key) {
-  var value = object == null ? undefined : object[key];
-  return isNative(value) ? value : undefined;
-}
-
 /**
  * Checks if `value` is suitable for use as unique object key.
  *
@@ -282,128 +204,4 @@ function isKeyable(value) {
     (type == 'string' && value != '__proto__') || value == null;
 }
 
-/**
- * Checks if `value` is classified as a `Function` object.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
- * @example
- *
- * _.isFunction(_);
- * // => true
- *
- * _.isFunction(/abc/);
- * // => false
- */
-function isFunction(value) {
-  // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array constructors, and
-  // PhantomJS 1.9 which returns 'function' for `NodeList` instances.
-  var tag = isObject(value) ? objectToString.call(value) : '';
-  return tag == funcTag || tag == genTag;
-}
-
-/**
- * Checks if `value` is the [language type](https://es5.github.io/#x8) of `Object`.
- * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an object, else `false`.
- * @example
- *
- * _.isObject({});
- * // => true
- *
- * _.isObject([1, 2, 3]);
- * // => true
- *
- * _.isObject(_.noop);
- * // => true
- *
- * _.isObject(null);
- * // => false
- */
-function isObject(value) {
-  var type = typeof value;
-  return !!value && (type == 'object' || type == 'function');
-}
-
-/**
- * Checks if `value` is object-like. A value is object-like if it's not `null`
- * and has a `typeof` result of "object".
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
- * @example
- *
- * _.isObjectLike({});
- * // => true
- *
- * _.isObjectLike([1, 2, 3]);
- * // => true
- *
- * _.isObjectLike(_.noop);
- * // => false
- *
- * _.isObjectLike(null);
- * // => false
- */
-function isObjectLike(value) {
-  return !!value && typeof value == 'object';
-}
-
-/**
- * Checks if `value` is a native function.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a native function, else `false`.
- * @example
- *
- * _.isNative(Array.prototype.push);
- * // => true
- *
- * _.isNative(_);
- * // => false
- */
-function isNative(value) {
-  if (value == null) {
-    return false;
-  }
-  if (isFunction(value)) {
-    return reIsNative.test(funcToString.call(value));
-  }
-  return isObjectLike(value) &&
-    (isHostObject(value) ? reIsNative : reIsHostCtor).test(value);
-}
-
-/**
- * A no-operation function that returns `undefined` regardless of the
- * arguments it receives.
- *
- * @static
- * @memberOf _
- * @category Util
- * @example
- *
- * var object = { 'user': 'fred' };
- *
- * _.noop(object) === undefined;
- * // => true
- */
-function noop() {
-  // No operation performed.
-}
-
 module.exports = baseUniq;
diff --git a/lodash._baseuniq/package.json b/lodash._baseuniq/package.json
index c9a6bb1a1..6b099e4aa 100644
--- a/lodash._baseuniq/package.json
+++ b/lodash._baseuniq/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash._baseuniq",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The internal lodash function `baseUniq` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -14,7 +14,7 @@
   "repository": "lodash/lodash",
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
-    "lodash._root": "^3.0.0",
+    "lodash._createset": "^4.0.0",
     "lodash._setcache": "^4.0.0"
   }
 }
diff --git a/lodash._basexor/LICENSE b/lodash._basexor/LICENSE
index bcbe13d67..e0c69d560 100644
--- a/lodash._basexor/LICENSE
+++ b/lodash._basexor/LICENSE
@@ -1,23 +1,47 @@
-The MIT License (MIT)
+Copyright jQuery Foundation and other contributors <https://jquery.org/>
 
-Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
-Based on Underscore.js, copyright 2009-2016 Jeremy Ashkenas,
+Based on Underscore.js, copyright Jeremy Ashkenas,
 DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
+This software consists of voluntary contributions made by many
+individuals. For exact contribution history, see the revision history
+available at https://github.com/lodash/lodash
 
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
+The following license applies to all parts of this software except as
+documented below:
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+====
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+====
+
+Copyright and related rights for sample code are waived via CC0. Sample
+code is defined as all source code displayed within the prose of the
+documentation.
+
+CC0: http://creativecommons.org/publicdomain/zero/1.0/
+
+====
+
+Files located in the node_modules and vendor directories are externally
+maintained libraries used by this software which have their own
+licenses; we recommend you read them, as their terms may differ from the
+terms above.
diff --git a/lodash._basexor/README.md b/lodash._basexor/README.md
index 34331c007..9c521b54d 100644
--- a/lodash._basexor/README.md
+++ b/lodash._basexor/README.md
@@ -1,4 +1,4 @@
-# lodash._basexor v4.4.1
+# lodash._basexor v4.5.0
 
 The internal [lodash](https://lodash.com/) function `baseXor` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var baseXor = require('lodash._basexor');
 ```
 
-See the [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash._basexor) for more details.
+See the [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash._basexor) for more details.
diff --git a/lodash._basexor/index.js b/lodash._basexor/index.js
index bdf60c148..656392550 100644
--- a/lodash._basexor/index.js
+++ b/lodash._basexor/index.js
@@ -1,10 +1,10 @@
 /**
- * lodash 4.4.1 (Custom Build) <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
- * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
+ * Copyright jQuery Foundation and other contributors <https://jquery.org/>
+ * Released under MIT license <https://lodash.com/license>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
- * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
- * Available under MIT license <https://lodash.com/license>
+ * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
 var baseDifference = require('lodash._basedifference'),
     baseUniq = require('lodash._baseuniq');
diff --git a/lodash._basexor/package.json b/lodash._basexor/package.json
index ef28916d6..c4b03b8d2 100644
--- a/lodash._basexor/package.json
+++ b/lodash._basexor/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash._basexor",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The internal lodash function `baseXor` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -14,7 +14,7 @@
   "repository": "lodash/lodash",
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
-    "lodash._basedifference": "~4.4.0",
-    "lodash._baseuniq": "~4.5.0"
+    "lodash._basedifference": "~4.5.0",
+    "lodash._baseuniq": "~4.6.0"
   }
 }
diff --git a/lodash.at/README.md b/lodash.at/README.md
index 3022cfcaf..dea4c1a99 100644
--- a/lodash.at/README.md
+++ b/lodash.at/README.md
@@ -1,4 +1,4 @@
-# lodash.at v4.4.0
+# lodash.at v4.5.0
 
 The [lodash](https://lodash.com/) method `_.at` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var at = require('lodash.at');
 ```
 
-See the [documentation](https://lodash.com/docs#at) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.at) for more details.
+See the [documentation](https://lodash.com/docs#at) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.at) for more details.
diff --git a/lodash.at/index.js b/lodash.at/index.js
index 36632f088..550f2c639 100644
--- a/lodash.at/index.js
+++ b/lodash.at/index.js
@@ -6,22 +6,150 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseFlatten = require('lodash._baseflatten'),
-    rest = require('lodash.rest'),
-    stringToPath = require('lodash._stringtopath');
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
 /** Used as references for various `Number` constants. */
-var INFINITY = 1 / 0;
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
-var symbolTag = '[object Symbol]';
+var argsTag = '[object Arguments]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    symbolTag = '[object Symbol]';
 
 /** Used to match property names within property paths. */
 var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
-    reIsPlainProp = /^\w*$/;
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/**
+ * A faster alternative to `Function#apply`, this function invokes `func`
+ * with the `this` binding of `thisArg` and the arguments of `args`.
+ *
+ * @private
+ * @param {Function} func The function to invoke.
+ * @param {*} thisArg The `this` binding of `func`.
+ * @param {Array} args The arguments to invoke `func` with.
+ * @returns {*} Returns the result of `func`.
+ */
+function apply(func, thisArg, args) {
+  switch (args.length) {
+    case 0: return func.call(thisArg);
+    case 1: return func.call(thisArg, args[0]);
+    case 2: return func.call(thisArg, args[0], args[1]);
+    case 3: return func.call(thisArg, args[0], args[1], args[2]);
+  }
+  return func.apply(thisArg, args);
+}
+
+/**
+ * Appends the elements of `values` to `array`.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {Array} values The values to append.
+ * @returns {Array} Returns `array`.
+ */
+function arrayPush(array, values) {
+  var index = -1,
+      length = values.length,
+      offset = array.length;
+
+  while (++index < length) {
+    array[offset + index] = values[index];
+  }
+  return array;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
 
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
@@ -30,6 +158,351 @@ var objectProto = Object.prototype;
  */
 var objectToString = objectProto.toString;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice,
+    spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeMax = Math.max;
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
 /**
  * The base implementation of `_.at` without support for individual paths.
  *
@@ -50,6 +523,40 @@ function baseAt(object, paths) {
   return result;
 }
 
+/**
+ * The base implementation of `_.flatten` with support for restricting flattening.
+ *
+ * @private
+ * @param {Array} array The array to flatten.
+ * @param {number} depth The maximum recursion depth.
+ * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
+ * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
+ * @param {Array} [result=[]] The initial result value.
+ * @returns {Array} Returns the new flattened array.
+ */
+function baseFlatten(array, depth, predicate, isStrict, result) {
+  var index = -1,
+      length = array.length;
+
+  predicate || (predicate = isFlattenable);
+  result || (result = []);
+
+  while (++index < length) {
+    var value = array[index];
+    if (depth > 0 && predicate(value)) {
+      if (depth > 1) {
+        // Recursively flatten arrays (susceptible to call stack limits).
+        baseFlatten(value, depth - 1, predicate, isStrict, result);
+      } else {
+        arrayPush(result, value);
+      }
+    } else if (!isStrict) {
+      result[result.length] = value;
+    }
+  }
+  return result;
+}
+
 /**
  * The base implementation of `_.get` without support for default values.
  *
@@ -70,6 +577,71 @@ function baseGet(object, path) {
   return (index && index == length) ? object : undefined;
 }
 
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.rest` which doesn't validate or coerce arguments.
+ *
+ * @private
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @returns {Function} Returns the new function.
+ */
+function baseRest(func, start) {
+  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+  return function() {
+    var args = arguments,
+        index = -1,
+        length = nativeMax(args.length - start, 0),
+        array = Array(length);
+
+    while (++index < length) {
+      array[index] = args[start + index];
+    }
+    index = -1;
+    var otherArgs = Array(start + 1);
+    while (++index < start) {
+      otherArgs[index] = args[index];
+    }
+    otherArgs[start] = array;
+    return apply(func, this, otherArgs);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Casts `value` to a path array if it's not one.
  *
@@ -81,6 +653,59 @@ function castPath(value) {
   return isArray(value) ? value : stringToPath(value);
 }
 
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Checks if `value` is a flattenable `arguments` object or array.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
+ */
+function isFlattenable(value) {
+  return isArray(value) || isArguments(value) ||
+    !!(spreadableSymbol && value && value[spreadableSymbol])
+}
+
 /**
  * Checks if `value` is a property name and not a property path.
  *
@@ -102,6 +727,46 @@ function isKey(value, object) {
     (object != null && value in Object(object));
 }
 
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
 /**
  * Converts `value` to a string key if it's not a string or symbol.
  *
@@ -117,17 +782,161 @@ function toKey(value) {
   return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
 }
 
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -144,6 +953,151 @@ function toKey(value) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
 /**
  * Checks if `value` is object-like. A value is object-like if it's not `null`
  * and has a `typeof` result of "object".
@@ -180,8 +1134,7 @@ function isObjectLike(value) {
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  * @example
  *
  * _.isSymbol(Symbol.iterator);
@@ -195,6 +1148,31 @@ function isSymbol(value) {
     (isObjectLike(value) && objectToString.call(value) == symbolTag);
 }
 
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
 /**
  * Creates an array of values corresponding to `paths` of `object`.
  *
@@ -211,17 +1189,14 @@ function isSymbol(value) {
  *
  * _.at(object, ['a[0].b.c', 'a[1]']);
  * // => [3, 4]
- *
- * _.at(['a', 'b', 'c'], 0, 2);
- * // => ['a', 'c']
  */
-var at = rest(function(object, paths) {
+var at = baseRest(function(object, paths) {
   return baseAt(object, baseFlatten(paths, 1));
 });
 
 /**
  * Gets the value at `path` of `object`. If the resolved value is
- * `undefined`, the `defaultValue` is used in its place.
+ * `undefined`, the `defaultValue` is returned in its place.
  *
  * @static
  * @memberOf _
diff --git a/lodash.at/package.json b/lodash.at/package.json
index deedeac87..56ce7e93b 100644
--- a/lodash.at/package.json
+++ b/lodash.at/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.at",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.at` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseflatten": "~4.2.0",
-    "lodash._stringtopath": "~4.8.0",
-    "lodash.rest": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.clone/README.md b/lodash.clone/README.md
index fa7aa49b3..3fb22d56e 100644
--- a/lodash.clone/README.md
+++ b/lodash.clone/README.md
@@ -1,4 +1,4 @@
-# lodash.clone v4.4.1
+# lodash.clone v4.5.0
 
 The [lodash](https://lodash.com/) method `_.clone` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var clone = require('lodash.clone');
 ```
 
-See the [documentation](https://lodash.com/docs#clone) or [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash.clone) for more details.
+See the [documentation](https://lodash.com/docs#clone) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.clone) for more details.
diff --git a/lodash.clone/index.js b/lodash.clone/index.js
index 8777b1809..9c71d60c8 100644
--- a/lodash.clone/index.js
+++ b/lodash.clone/index.js
@@ -48,7 +48,7 @@ var arrayBufferTag = '[object ArrayBuffer]',
 
 /**
  * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
@@ -188,19 +188,6 @@ function arrayReduce(array, iteratee, accumulator, initAccum) {
   return accumulator;
 }
 
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
 /**
  * The base implementation of `_.times` without support for iteratee shorthands
  * or max array length checks.
@@ -269,7 +256,7 @@ function mapToArray(map) {
 }
 
 /**
- * Creates a function that invokes `func` with its first argument transformed.
+ * Creates a unary function that invokes `func` with its argument transformed.
  *
  * @private
  * @param {Function} func The function to wrap.
@@ -301,6 +288,7 @@ function setToArray(set) {
 
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
+    funcProto = Function.prototype,
     objectProto = Object.prototype;
 
 /** Used to detect overreaching core-js shims. */
@@ -313,14 +301,14 @@ var maskSrcKey = (function() {
 }());
 
 /** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
+var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -335,15 +323,15 @@ var reIsNative = RegExp('^' +
 var Buffer = moduleExports ? root.Buffer : undefined,
     Symbol = root.Symbol,
     Uint8Array = root.Uint8Array,
+    getPrototype = overArg(Object.getPrototypeOf, Object),
     objectCreate = Object.create,
     propertyIsEnumerable = objectProto.propertyIsEnumerable,
     splice = arrayProto.splice;
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf,
-    nativeGetSymbols = Object.getOwnPropertySymbols,
+var nativeGetSymbols = Object.getOwnPropertySymbols,
     nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
-    nativeKeys = Object.keys;
+    nativeKeys = overArg(Object.keys, Object);
 
 /* Built-in method references that are verified to be native. */
 var DataView = getNative(root, 'DataView'),
@@ -760,9 +748,36 @@ Stack.prototype.get = stackGet;
 Stack.prototype.has = stackHas;
 Stack.prototype.set = stackSet;
 
+/**
+ * Creates an array of the enumerable property names of the array-like `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @param {boolean} inherited Specify returning inherited property names.
+ * @returns {Array} Returns the array of property names.
+ */
+function arrayLikeKeys(value, inherited) {
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
+  // Safari 9 makes `arguments.length` enumerable in strict mode.
+  var result = (isArray(value) || isArguments(value))
+    ? baseTimes(value.length, String)
+    : [];
+
+  var length = result.length,
+      skipIndexes = !!length;
+
+  for (var key in value) {
+    if ((inherited || hasOwnProperty.call(value, key)) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * Assigns `value` to `key` of `object` if the existing value is not equivalent
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * for equality comparisons.
  *
  * @private
@@ -782,7 +797,7 @@ function assignValue(object, key, value) {
  * Gets the index at which the `key` is found in `array` of key-value pairs.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} key The key to search for.
  * @returns {number} Returns the index of the matched value, else `-1`.
  */
@@ -923,23 +938,6 @@ function baseGetTag(value) {
   return objectToString.call(value);
 }
 
-/**
- * The base implementation of `_.has` without support for deep paths.
- *
- * @private
- * @param {Object} [object] The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
-function baseHas(object, key) {
-  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
-  // that are composed entirely of index properties, return `false` for
-  // `hasOwnProperty` checks of them.
-  return object != null &&
-    (hasOwnProperty.call(object, key) ||
-      (typeof object == 'object' && key in object && getPrototype(object) === null));
-}
-
 /**
  * The base implementation of `_.isNative` without bad shim checks.
  *
@@ -957,14 +955,24 @@ function baseIsNative(value) {
 }
 
 /**
- * The base implementation of `_.keys` which doesn't skip the constructor
- * property of prototypes or treat sparse arrays as dense.
+ * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
  *
  * @private
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of property names.
  */
-var baseKeys = overArg(nativeKeys, Object);
+function baseKeys(object) {
+  if (!isPrototype(object)) {
+    return nativeKeys(object);
+  }
+  var result = [];
+  for (var key in Object(object)) {
+    if (hasOwnProperty.call(object, key) && key != 'constructor') {
+      result.push(key);
+    }
+  }
+  return result;
+}
 
 /**
  * Creates a clone of  `buffer`.
@@ -1144,19 +1152,6 @@ function getAllKeys(object) {
   return baseGetAllKeys(object, keys, getSymbols);
 }
 
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
 /**
  * Gets the data for `map`.
  *
@@ -1185,15 +1180,6 @@ function getNative(object, key) {
   return baseIsNative(value) ? value : undefined;
 }
 
-/**
- * Gets the `[[Prototype]]` of `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {null|Object} Returns the `[[Prototype]]`.
- */
-var getPrototype = overArg(nativeGetPrototype, Object);
-
 /**
  * Creates an array of the own enumerable symbol properties of `object`.
  *
@@ -1213,7 +1199,7 @@ var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArra
 var getTag = baseGetTag;
 
 // Fallback for data views, maps, sets, and weak maps in IE 11,
-// for data views in Edge, and promises in Node.js.
+// for data views in Edge < 14, and promises in Node.js.
 if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
     (Map && getTag(new Map) != mapTag) ||
     (Promise && getTag(Promise.resolve()) != promiseTag) ||
@@ -1318,23 +1304,6 @@ function initCloneByTag(object, tag, cloneFunc, isDeep) {
   }
 }
 
-/**
- * Creates an array of index keys for `object` values of arrays,
- * `arguments` objects, and strings, otherwise `null` is returned.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array|null} Returns index keys, else `null`.
- */
-function indexKeys(object) {
-  var length = object ? object.length : undefined;
-  if (isLength(length) &&
-      (isArray(object) || isString(object) || isArguments(object))) {
-    return baseTimes(length, String);
-  }
-  return null;
-}
-
 /**
  * Checks if `value` is a valid array-like index.
  *
@@ -1440,7 +1409,7 @@ function clone(value) {
 
 /**
  * Performs a
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * comparison between two values to determine if they are equivalent.
  *
  * @static
@@ -1493,7 +1462,7 @@ function eq(value, other) {
  * // => false
  */
 function isArguments(value) {
-  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
   return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
     (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
@@ -1549,7 +1518,7 @@ var isArray = Array.isArray;
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -1619,8 +1588,7 @@ var isBuffer = nativeIsBuffer || stubFalse;
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -1628,16 +1596,15 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);
@@ -1659,7 +1626,7 @@ function isLength(value) {
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
@@ -1715,33 +1682,11 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
-/**
- * Checks if `value` is classified as a `String` primitive or object.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a string, else `false`.
- * @example
- *
- * _.isString('abc');
- * // => true
- *
- * _.isString(1);
- * // => false
- */
-function isString(value) {
-  return typeof value == 'string' ||
-    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
-}
-
 /**
  * Creates an array of the own enumerable property names of `object`.
  *
  * **Note:** Non-object values are coerced to objects. See the
- * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
  * for more details.
  *
  * @static
@@ -1766,23 +1711,7 @@ function isString(value) {
  * // => ['0', '1']
  */
 function keys(object) {
-  var isProto = isPrototype(object);
-  if (!(isProto || isArrayLike(object))) {
-    return baseKeys(object);
-  }
-  var indexes = indexKeys(object),
-      skipIndexes = !!indexes,
-      result = indexes || [],
-      length = result.length;
-
-  for (var key in object) {
-    if (baseHas(object, key) &&
-        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
-        !(isProto && key == 'constructor')) {
-      result.push(key);
-    }
-  }
-  return result;
+  return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
 }
 
 /**
diff --git a/lodash.clone/package.json b/lodash.clone/package.json
index a0761f713..8577beb3c 100644
--- a/lodash.clone/package.json
+++ b/lodash.clone/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.clone",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The lodash method `_.clone` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.clonedeep/README.md b/lodash.clonedeep/README.md
index 67634fe49..fee48e470 100644
--- a/lodash.clonedeep/README.md
+++ b/lodash.clonedeep/README.md
@@ -1,4 +1,4 @@
-# lodash.clonedeep v4.4.1
+# lodash.clonedeep v4.5.0
 
 The [lodash](https://lodash.com/) method `_.cloneDeep` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var cloneDeep = require('lodash.clonedeep');
 ```
 
-See the [documentation](https://lodash.com/docs#cloneDeep) or [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash.clonedeep) for more details.
+See the [documentation](https://lodash.com/docs#cloneDeep) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.clonedeep) for more details.
diff --git a/lodash.clonedeep/index.js b/lodash.clonedeep/index.js
index 75fba5e02..1b0e50298 100644
--- a/lodash.clonedeep/index.js
+++ b/lodash.clonedeep/index.js
@@ -48,7 +48,7 @@ var arrayBufferTag = '[object ArrayBuffer]',
 
 /**
  * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
@@ -188,19 +188,6 @@ function arrayReduce(array, iteratee, accumulator, initAccum) {
   return accumulator;
 }
 
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
 /**
  * The base implementation of `_.times` without support for iteratee shorthands
  * or max array length checks.
@@ -269,7 +256,7 @@ function mapToArray(map) {
 }
 
 /**
- * Creates a function that invokes `func` with its first argument transformed.
+ * Creates a unary function that invokes `func` with its argument transformed.
  *
  * @private
  * @param {Function} func The function to wrap.
@@ -301,6 +288,7 @@ function setToArray(set) {
 
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
+    funcProto = Function.prototype,
     objectProto = Object.prototype;
 
 /** Used to detect overreaching core-js shims. */
@@ -313,14 +301,14 @@ var maskSrcKey = (function() {
 }());
 
 /** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
+var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -335,15 +323,15 @@ var reIsNative = RegExp('^' +
 var Buffer = moduleExports ? root.Buffer : undefined,
     Symbol = root.Symbol,
     Uint8Array = root.Uint8Array,
+    getPrototype = overArg(Object.getPrototypeOf, Object),
     objectCreate = Object.create,
     propertyIsEnumerable = objectProto.propertyIsEnumerable,
     splice = arrayProto.splice;
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf,
-    nativeGetSymbols = Object.getOwnPropertySymbols,
+var nativeGetSymbols = Object.getOwnPropertySymbols,
     nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
-    nativeKeys = Object.keys;
+    nativeKeys = overArg(Object.keys, Object);
 
 /* Built-in method references that are verified to be native. */
 var DataView = getNative(root, 'DataView'),
@@ -760,9 +748,36 @@ Stack.prototype.get = stackGet;
 Stack.prototype.has = stackHas;
 Stack.prototype.set = stackSet;
 
+/**
+ * Creates an array of the enumerable property names of the array-like `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @param {boolean} inherited Specify returning inherited property names.
+ * @returns {Array} Returns the array of property names.
+ */
+function arrayLikeKeys(value, inherited) {
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
+  // Safari 9 makes `arguments.length` enumerable in strict mode.
+  var result = (isArray(value) || isArguments(value))
+    ? baseTimes(value.length, String)
+    : [];
+
+  var length = result.length,
+      skipIndexes = !!length;
+
+  for (var key in value) {
+    if ((inherited || hasOwnProperty.call(value, key)) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * Assigns `value` to `key` of `object` if the existing value is not equivalent
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * for equality comparisons.
  *
  * @private
@@ -782,7 +797,7 @@ function assignValue(object, key, value) {
  * Gets the index at which the `key` is found in `array` of key-value pairs.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} key The key to search for.
  * @returns {number} Returns the index of the matched value, else `-1`.
  */
@@ -923,23 +938,6 @@ function baseGetTag(value) {
   return objectToString.call(value);
 }
 
-/**
- * The base implementation of `_.has` without support for deep paths.
- *
- * @private
- * @param {Object} [object] The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
-function baseHas(object, key) {
-  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
-  // that are composed entirely of index properties, return `false` for
-  // `hasOwnProperty` checks of them.
-  return object != null &&
-    (hasOwnProperty.call(object, key) ||
-      (typeof object == 'object' && key in object && getPrototype(object) === null));
-}
-
 /**
  * The base implementation of `_.isNative` without bad shim checks.
  *
@@ -957,14 +955,24 @@ function baseIsNative(value) {
 }
 
 /**
- * The base implementation of `_.keys` which doesn't skip the constructor
- * property of prototypes or treat sparse arrays as dense.
+ * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
  *
  * @private
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of property names.
  */
-var baseKeys = overArg(nativeKeys, Object);
+function baseKeys(object) {
+  if (!isPrototype(object)) {
+    return nativeKeys(object);
+  }
+  var result = [];
+  for (var key in Object(object)) {
+    if (hasOwnProperty.call(object, key) && key != 'constructor') {
+      result.push(key);
+    }
+  }
+  return result;
+}
 
 /**
  * Creates a clone of  `buffer`.
@@ -1144,19 +1152,6 @@ function getAllKeys(object) {
   return baseGetAllKeys(object, keys, getSymbols);
 }
 
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
 /**
  * Gets the data for `map`.
  *
@@ -1185,15 +1180,6 @@ function getNative(object, key) {
   return baseIsNative(value) ? value : undefined;
 }
 
-/**
- * Gets the `[[Prototype]]` of `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {null|Object} Returns the `[[Prototype]]`.
- */
-var getPrototype = overArg(nativeGetPrototype, Object);
-
 /**
  * Creates an array of the own enumerable symbol properties of `object`.
  *
@@ -1213,7 +1199,7 @@ var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArra
 var getTag = baseGetTag;
 
 // Fallback for data views, maps, sets, and weak maps in IE 11,
-// for data views in Edge, and promises in Node.js.
+// for data views in Edge < 14, and promises in Node.js.
 if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
     (Map && getTag(new Map) != mapTag) ||
     (Promise && getTag(Promise.resolve()) != promiseTag) ||
@@ -1318,23 +1304,6 @@ function initCloneByTag(object, tag, cloneFunc, isDeep) {
   }
 }
 
-/**
- * Creates an array of index keys for `object` values of arrays,
- * `arguments` objects, and strings, otherwise `null` is returned.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array|null} Returns index keys, else `null`.
- */
-function indexKeys(object) {
-  var length = object ? object.length : undefined;
-  if (isLength(length) &&
-      (isArray(object) || isString(object) || isArguments(object))) {
-    return baseTimes(length, String);
-  }
-  return null;
-}
-
 /**
  * Checks if `value` is a valid array-like index.
  *
@@ -1432,7 +1401,7 @@ function cloneDeep(value) {
 
 /**
  * Performs a
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * comparison between two values to determine if they are equivalent.
  *
  * @static
@@ -1485,7 +1454,7 @@ function eq(value, other) {
  * // => false
  */
 function isArguments(value) {
-  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
   return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
     (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
@@ -1541,7 +1510,7 @@ var isArray = Array.isArray;
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -1611,8 +1580,7 @@ var isBuffer = nativeIsBuffer || stubFalse;
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -1620,16 +1588,15 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);
@@ -1651,7 +1618,7 @@ function isLength(value) {
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
@@ -1707,33 +1674,11 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
-/**
- * Checks if `value` is classified as a `String` primitive or object.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a string, else `false`.
- * @example
- *
- * _.isString('abc');
- * // => true
- *
- * _.isString(1);
- * // => false
- */
-function isString(value) {
-  return typeof value == 'string' ||
-    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
-}
-
 /**
  * Creates an array of the own enumerable property names of `object`.
  *
  * **Note:** Non-object values are coerced to objects. See the
- * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
  * for more details.
  *
  * @static
@@ -1758,23 +1703,7 @@ function isString(value) {
  * // => ['0', '1']
  */
 function keys(object) {
-  var isProto = isPrototype(object);
-  if (!(isProto || isArrayLike(object))) {
-    return baseKeys(object);
-  }
-  var indexes = indexKeys(object),
-      skipIndexes = !!indexes,
-      result = indexes || [],
-      length = result.length;
-
-  for (var key in object) {
-    if (baseHas(object, key) &&
-        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
-        !(isProto && key == 'constructor')) {
-      result.push(key);
-    }
-  }
-  return result;
+  return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
 }
 
 /**
diff --git a/lodash.clonedeep/package.json b/lodash.clonedeep/package.json
index 00a424263..fb1d626d5 100644
--- a/lodash.clonedeep/package.json
+++ b/lodash.clonedeep/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.clonedeep",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The lodash method `_.cloneDeep` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.clonedeepwith/README.md b/lodash.clonedeepwith/README.md
index fbf1a94de..c5de47a58 100644
--- a/lodash.clonedeepwith/README.md
+++ b/lodash.clonedeepwith/README.md
@@ -1,4 +1,4 @@
-# lodash.clonedeepwith v4.4.1
+# lodash.clonedeepwith v4.5.0
 
 The [lodash](https://lodash.com/) method `_.cloneDeepWith` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var cloneDeepWith = require('lodash.clonedeepwith');
 ```
 
-See the [documentation](https://lodash.com/docs#cloneDeepWith) or [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash.clonedeepwith) for more details.
+See the [documentation](https://lodash.com/docs#cloneDeepWith) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.clonedeepwith) for more details.
diff --git a/lodash.clonedeepwith/index.js b/lodash.clonedeepwith/index.js
index de215d25e..e1d0b72bc 100644
--- a/lodash.clonedeepwith/index.js
+++ b/lodash.clonedeepwith/index.js
@@ -48,7 +48,7 @@ var arrayBufferTag = '[object ArrayBuffer]',
 
 /**
  * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
@@ -188,19 +188,6 @@ function arrayReduce(array, iteratee, accumulator, initAccum) {
   return accumulator;
 }
 
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
 /**
  * The base implementation of `_.times` without support for iteratee shorthands
  * or max array length checks.
@@ -269,7 +256,7 @@ function mapToArray(map) {
 }
 
 /**
- * Creates a function that invokes `func` with its first argument transformed.
+ * Creates a unary function that invokes `func` with its argument transformed.
  *
  * @private
  * @param {Function} func The function to wrap.
@@ -301,6 +288,7 @@ function setToArray(set) {
 
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
+    funcProto = Function.prototype,
     objectProto = Object.prototype;
 
 /** Used to detect overreaching core-js shims. */
@@ -313,14 +301,14 @@ var maskSrcKey = (function() {
 }());
 
 /** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
+var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -335,15 +323,15 @@ var reIsNative = RegExp('^' +
 var Buffer = moduleExports ? root.Buffer : undefined,
     Symbol = root.Symbol,
     Uint8Array = root.Uint8Array,
+    getPrototype = overArg(Object.getPrototypeOf, Object),
     objectCreate = Object.create,
     propertyIsEnumerable = objectProto.propertyIsEnumerable,
     splice = arrayProto.splice;
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf,
-    nativeGetSymbols = Object.getOwnPropertySymbols,
+var nativeGetSymbols = Object.getOwnPropertySymbols,
     nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
-    nativeKeys = Object.keys;
+    nativeKeys = overArg(Object.keys, Object);
 
 /* Built-in method references that are verified to be native. */
 var DataView = getNative(root, 'DataView'),
@@ -760,9 +748,36 @@ Stack.prototype.get = stackGet;
 Stack.prototype.has = stackHas;
 Stack.prototype.set = stackSet;
 
+/**
+ * Creates an array of the enumerable property names of the array-like `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @param {boolean} inherited Specify returning inherited property names.
+ * @returns {Array} Returns the array of property names.
+ */
+function arrayLikeKeys(value, inherited) {
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
+  // Safari 9 makes `arguments.length` enumerable in strict mode.
+  var result = (isArray(value) || isArguments(value))
+    ? baseTimes(value.length, String)
+    : [];
+
+  var length = result.length,
+      skipIndexes = !!length;
+
+  for (var key in value) {
+    if ((inherited || hasOwnProperty.call(value, key)) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * Assigns `value` to `key` of `object` if the existing value is not equivalent
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * for equality comparisons.
  *
  * @private
@@ -782,7 +797,7 @@ function assignValue(object, key, value) {
  * Gets the index at which the `key` is found in `array` of key-value pairs.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} key The key to search for.
  * @returns {number} Returns the index of the matched value, else `-1`.
  */
@@ -923,23 +938,6 @@ function baseGetTag(value) {
   return objectToString.call(value);
 }
 
-/**
- * The base implementation of `_.has` without support for deep paths.
- *
- * @private
- * @param {Object} [object] The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
-function baseHas(object, key) {
-  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
-  // that are composed entirely of index properties, return `false` for
-  // `hasOwnProperty` checks of them.
-  return object != null &&
-    (hasOwnProperty.call(object, key) ||
-      (typeof object == 'object' && key in object && getPrototype(object) === null));
-}
-
 /**
  * The base implementation of `_.isNative` without bad shim checks.
  *
@@ -957,14 +955,24 @@ function baseIsNative(value) {
 }
 
 /**
- * The base implementation of `_.keys` which doesn't skip the constructor
- * property of prototypes or treat sparse arrays as dense.
+ * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
  *
  * @private
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of property names.
  */
-var baseKeys = overArg(nativeKeys, Object);
+function baseKeys(object) {
+  if (!isPrototype(object)) {
+    return nativeKeys(object);
+  }
+  var result = [];
+  for (var key in Object(object)) {
+    if (hasOwnProperty.call(object, key) && key != 'constructor') {
+      result.push(key);
+    }
+  }
+  return result;
+}
 
 /**
  * Creates a clone of  `buffer`.
@@ -1144,19 +1152,6 @@ function getAllKeys(object) {
   return baseGetAllKeys(object, keys, getSymbols);
 }
 
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
 /**
  * Gets the data for `map`.
  *
@@ -1185,15 +1180,6 @@ function getNative(object, key) {
   return baseIsNative(value) ? value : undefined;
 }
 
-/**
- * Gets the `[[Prototype]]` of `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {null|Object} Returns the `[[Prototype]]`.
- */
-var getPrototype = overArg(nativeGetPrototype, Object);
-
 /**
  * Creates an array of the own enumerable symbol properties of `object`.
  *
@@ -1213,7 +1199,7 @@ var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArra
 var getTag = baseGetTag;
 
 // Fallback for data views, maps, sets, and weak maps in IE 11,
-// for data views in Edge, and promises in Node.js.
+// for data views in Edge < 14, and promises in Node.js.
 if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
     (Map && getTag(new Map) != mapTag) ||
     (Promise && getTag(Promise.resolve()) != promiseTag) ||
@@ -1318,23 +1304,6 @@ function initCloneByTag(object, tag, cloneFunc, isDeep) {
   }
 }
 
-/**
- * Creates an array of index keys for `object` values of arrays,
- * `arguments` objects, and strings, otherwise `null` is returned.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array|null} Returns index keys, else `null`.
- */
-function indexKeys(object) {
-  var length = object ? object.length : undefined;
-  if (isLength(length) &&
-      (isArray(object) || isString(object) || isArguments(object))) {
-    return baseTimes(length, String);
-  }
-  return null;
-}
-
 /**
  * Checks if `value` is a valid array-like index.
  *
@@ -1442,7 +1411,7 @@ function cloneDeepWith(value, customizer) {
 
 /**
  * Performs a
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * comparison between two values to determine if they are equivalent.
  *
  * @static
@@ -1495,7 +1464,7 @@ function eq(value, other) {
  * // => false
  */
 function isArguments(value) {
-  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
   return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
     (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
@@ -1551,7 +1520,7 @@ var isArray = Array.isArray;
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -1621,8 +1590,7 @@ var isBuffer = nativeIsBuffer || stubFalse;
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -1630,16 +1598,15 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);
@@ -1661,7 +1628,7 @@ function isLength(value) {
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
@@ -1717,33 +1684,11 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
-/**
- * Checks if `value` is classified as a `String` primitive or object.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a string, else `false`.
- * @example
- *
- * _.isString('abc');
- * // => true
- *
- * _.isString(1);
- * // => false
- */
-function isString(value) {
-  return typeof value == 'string' ||
-    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
-}
-
 /**
  * Creates an array of the own enumerable property names of `object`.
  *
  * **Note:** Non-object values are coerced to objects. See the
- * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
  * for more details.
  *
  * @static
@@ -1768,23 +1713,7 @@ function isString(value) {
  * // => ['0', '1']
  */
 function keys(object) {
-  var isProto = isPrototype(object);
-  if (!(isProto || isArrayLike(object))) {
-    return baseKeys(object);
-  }
-  var indexes = indexKeys(object),
-      skipIndexes = !!indexes,
-      result = indexes || [],
-      length = result.length;
-
-  for (var key in object) {
-    if (baseHas(object, key) &&
-        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
-        !(isProto && key == 'constructor')) {
-      result.push(key);
-    }
-  }
-  return result;
+  return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
 }
 
 /**
diff --git a/lodash.clonedeepwith/package.json b/lodash.clonedeepwith/package.json
index 1f1856d31..1b05a8e50 100644
--- a/lodash.clonedeepwith/package.json
+++ b/lodash.clonedeepwith/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.clonedeepwith",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The lodash method `_.cloneDeepWith` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.clonewith/README.md b/lodash.clonewith/README.md
index 9eeda9d69..6dd253538 100644
--- a/lodash.clonewith/README.md
+++ b/lodash.clonewith/README.md
@@ -1,4 +1,4 @@
-# lodash.clonewith v4.4.1
+# lodash.clonewith v4.5.0
 
 The [lodash](https://lodash.com/) method `_.cloneWith` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var cloneWith = require('lodash.clonewith');
 ```
 
-See the [documentation](https://lodash.com/docs#cloneWith) or [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash.clonewith) for more details.
+See the [documentation](https://lodash.com/docs#cloneWith) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.clonewith) for more details.
diff --git a/lodash.clonewith/index.js b/lodash.clonewith/index.js
index 8b675b5c9..0c58347d0 100644
--- a/lodash.clonewith/index.js
+++ b/lodash.clonewith/index.js
@@ -48,7 +48,7 @@ var arrayBufferTag = '[object ArrayBuffer]',
 
 /**
  * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
@@ -188,19 +188,6 @@ function arrayReduce(array, iteratee, accumulator, initAccum) {
   return accumulator;
 }
 
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
 /**
  * The base implementation of `_.times` without support for iteratee shorthands
  * or max array length checks.
@@ -269,7 +256,7 @@ function mapToArray(map) {
 }
 
 /**
- * Creates a function that invokes `func` with its first argument transformed.
+ * Creates a unary function that invokes `func` with its argument transformed.
  *
  * @private
  * @param {Function} func The function to wrap.
@@ -301,6 +288,7 @@ function setToArray(set) {
 
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
+    funcProto = Function.prototype,
     objectProto = Object.prototype;
 
 /** Used to detect overreaching core-js shims. */
@@ -313,14 +301,14 @@ var maskSrcKey = (function() {
 }());
 
 /** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
+var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -335,15 +323,15 @@ var reIsNative = RegExp('^' +
 var Buffer = moduleExports ? root.Buffer : undefined,
     Symbol = root.Symbol,
     Uint8Array = root.Uint8Array,
+    getPrototype = overArg(Object.getPrototypeOf, Object),
     objectCreate = Object.create,
     propertyIsEnumerable = objectProto.propertyIsEnumerable,
     splice = arrayProto.splice;
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf,
-    nativeGetSymbols = Object.getOwnPropertySymbols,
+var nativeGetSymbols = Object.getOwnPropertySymbols,
     nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
-    nativeKeys = Object.keys;
+    nativeKeys = overArg(Object.keys, Object);
 
 /* Built-in method references that are verified to be native. */
 var DataView = getNative(root, 'DataView'),
@@ -760,9 +748,36 @@ Stack.prototype.get = stackGet;
 Stack.prototype.has = stackHas;
 Stack.prototype.set = stackSet;
 
+/**
+ * Creates an array of the enumerable property names of the array-like `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @param {boolean} inherited Specify returning inherited property names.
+ * @returns {Array} Returns the array of property names.
+ */
+function arrayLikeKeys(value, inherited) {
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
+  // Safari 9 makes `arguments.length` enumerable in strict mode.
+  var result = (isArray(value) || isArguments(value))
+    ? baseTimes(value.length, String)
+    : [];
+
+  var length = result.length,
+      skipIndexes = !!length;
+
+  for (var key in value) {
+    if ((inherited || hasOwnProperty.call(value, key)) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * Assigns `value` to `key` of `object` if the existing value is not equivalent
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * for equality comparisons.
  *
  * @private
@@ -782,7 +797,7 @@ function assignValue(object, key, value) {
  * Gets the index at which the `key` is found in `array` of key-value pairs.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} key The key to search for.
  * @returns {number} Returns the index of the matched value, else `-1`.
  */
@@ -923,23 +938,6 @@ function baseGetTag(value) {
   return objectToString.call(value);
 }
 
-/**
- * The base implementation of `_.has` without support for deep paths.
- *
- * @private
- * @param {Object} [object] The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
-function baseHas(object, key) {
-  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
-  // that are composed entirely of index properties, return `false` for
-  // `hasOwnProperty` checks of them.
-  return object != null &&
-    (hasOwnProperty.call(object, key) ||
-      (typeof object == 'object' && key in object && getPrototype(object) === null));
-}
-
 /**
  * The base implementation of `_.isNative` without bad shim checks.
  *
@@ -957,14 +955,24 @@ function baseIsNative(value) {
 }
 
 /**
- * The base implementation of `_.keys` which doesn't skip the constructor
- * property of prototypes or treat sparse arrays as dense.
+ * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
  *
  * @private
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of property names.
  */
-var baseKeys = overArg(nativeKeys, Object);
+function baseKeys(object) {
+  if (!isPrototype(object)) {
+    return nativeKeys(object);
+  }
+  var result = [];
+  for (var key in Object(object)) {
+    if (hasOwnProperty.call(object, key) && key != 'constructor') {
+      result.push(key);
+    }
+  }
+  return result;
+}
 
 /**
  * Creates a clone of  `buffer`.
@@ -1144,19 +1152,6 @@ function getAllKeys(object) {
   return baseGetAllKeys(object, keys, getSymbols);
 }
 
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
 /**
  * Gets the data for `map`.
  *
@@ -1185,15 +1180,6 @@ function getNative(object, key) {
   return baseIsNative(value) ? value : undefined;
 }
 
-/**
- * Gets the `[[Prototype]]` of `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {null|Object} Returns the `[[Prototype]]`.
- */
-var getPrototype = overArg(nativeGetPrototype, Object);
-
 /**
  * Creates an array of the own enumerable symbol properties of `object`.
  *
@@ -1213,7 +1199,7 @@ var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArra
 var getTag = baseGetTag;
 
 // Fallback for data views, maps, sets, and weak maps in IE 11,
-// for data views in Edge, and promises in Node.js.
+// for data views in Edge < 14, and promises in Node.js.
 if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
     (Map && getTag(new Map) != mapTag) ||
     (Promise && getTag(Promise.resolve()) != promiseTag) ||
@@ -1318,23 +1304,6 @@ function initCloneByTag(object, tag, cloneFunc, isDeep) {
   }
 }
 
-/**
- * Creates an array of index keys for `object` values of arrays,
- * `arguments` objects, and strings, otherwise `null` is returned.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array|null} Returns index keys, else `null`.
- */
-function indexKeys(object) {
-  var length = object ? object.length : undefined;
-  if (isLength(length) &&
-      (isArray(object) || isString(object) || isArguments(object))) {
-    return baseTimes(length, String);
-  }
-  return null;
-}
-
 /**
  * Checks if `value` is a valid array-like index.
  *
@@ -1445,7 +1414,7 @@ function cloneWith(value, customizer) {
 
 /**
  * Performs a
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * comparison between two values to determine if they are equivalent.
  *
  * @static
@@ -1498,7 +1467,7 @@ function eq(value, other) {
  * // => false
  */
 function isArguments(value) {
-  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
   return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
     (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
@@ -1554,7 +1523,7 @@ var isArray = Array.isArray;
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -1624,8 +1593,7 @@ var isBuffer = nativeIsBuffer || stubFalse;
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -1633,16 +1601,15 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);
@@ -1664,7 +1631,7 @@ function isLength(value) {
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
@@ -1720,33 +1687,11 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
-/**
- * Checks if `value` is classified as a `String` primitive or object.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a string, else `false`.
- * @example
- *
- * _.isString('abc');
- * // => true
- *
- * _.isString(1);
- * // => false
- */
-function isString(value) {
-  return typeof value == 'string' ||
-    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
-}
-
 /**
  * Creates an array of the own enumerable property names of `object`.
  *
  * **Note:** Non-object values are coerced to objects. See the
- * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
  * for more details.
  *
  * @static
@@ -1771,23 +1716,7 @@ function isString(value) {
  * // => ['0', '1']
  */
 function keys(object) {
-  var isProto = isPrototype(object);
-  if (!(isProto || isArrayLike(object))) {
-    return baseKeys(object);
-  }
-  var indexes = indexKeys(object),
-      skipIndexes = !!indexes,
-      result = indexes || [],
-      length = result.length;
-
-  for (var key in object) {
-    if (baseHas(object, key) &&
-        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
-        !(isProto && key == 'constructor')) {
-      result.push(key);
-    }
-  }
-  return result;
+  return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
 }
 
 /**
diff --git a/lodash.clonewith/package.json b/lodash.clonewith/package.json
index caee9afd7..3f1e14ef6 100644
--- a/lodash.clonewith/package.json
+++ b/lodash.clonewith/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.clonewith",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The lodash method `_.cloneWith` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.concat/README.md b/lodash.concat/README.md
index 2fa6979c5..8ea59aa96 100644
--- a/lodash.concat/README.md
+++ b/lodash.concat/README.md
@@ -1,4 +1,4 @@
-# lodash.concat v4.4.0
+# lodash.concat v4.5.0
 
 The [lodash](https://lodash.com/) method `_.concat` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var concat = require('lodash.concat');
 ```
 
-See the [documentation](https://lodash.com/docs#concat) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.concat) for more details.
+See the [documentation](https://lodash.com/docs#concat) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.concat) for more details.
diff --git a/lodash.concat/index.js b/lodash.concat/index.js
index fd54fd341..04d41be23 100644
--- a/lodash.concat/index.js
+++ b/lodash.concat/index.js
@@ -43,19 +43,6 @@ function arrayPush(array, values) {
   return array;
 }
 
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
 /** Used for built-in method references. */
 var objectProto = Object.prototype;
 
@@ -64,7 +51,7 @@ var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -127,19 +114,6 @@ function copyArray(source, array) {
   return array;
 }
 
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
 /**
  * Checks if `value` is a flattenable `arguments` object or array.
  *
@@ -207,7 +181,7 @@ function concat() {
  * // => false
  */
 function isArguments(value) {
-  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
   return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
     (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
@@ -263,7 +237,7 @@ var isArray = Array.isArray;
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -314,8 +288,7 @@ function isArrayLikeObject(value) {
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -323,16 +296,15 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);
@@ -354,7 +326,7 @@ function isLength(value) {
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
diff --git a/lodash.concat/package.json b/lodash.concat/package.json
index 5adcc7c2a..b23975466 100644
--- a/lodash.concat/package.json
+++ b/lodash.concat/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.concat",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.concat` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.cond/README.md b/lodash.cond/README.md
index c0f0e81a9..6d0de0dfb 100644
--- a/lodash.cond/README.md
+++ b/lodash.cond/README.md
@@ -1,4 +1,4 @@
-# lodash.cond v4.4.0
+# lodash.cond v4.5.0
 
 The [lodash](https://lodash.com/) method `_.cond` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var cond = require('lodash.cond');
 ```
 
-See the [documentation](https://lodash.com/docs#cond) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.cond) for more details.
+See the [documentation](https://lodash.com/docs#cond) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.cond) for more details.
diff --git a/lodash.cond/index.js b/lodash.cond/index.js
index 4288d38be..6bea8bedb 100644
--- a/lodash.cond/index.js
+++ b/lodash.cond/index.js
@@ -6,12 +6,121 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseIteratee = require('lodash._baseiteratee'),
-    rest = require('lodash.rest');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
 
 /** Used as the `TypeError` message for "Functions" methods. */
 var FUNC_ERROR_TEXT = 'Expected a function';
 
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
 /**
  * A faster alternative to `Function#apply`, this function invokes `func`
  * with the `this` binding of `thisArg` and the arguments of `args`.
@@ -23,8 +132,7 @@ var FUNC_ERROR_TEXT = 'Expected a function';
  * @returns {*} Returns the result of `func`.
  */
 function apply(func, thisArg, args) {
-  var length = args.length;
-  switch (length) {
+  switch (args.length) {
     case 0: return func.call(thisArg);
     case 1: return func.call(thisArg, args[0]);
     case 2: return func.call(thisArg, args[0], args[1]);
@@ -38,13 +146,13 @@ function apply(func, thisArg, args) {
  * shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @returns {Array} Returns the new mapped array.
  */
 function arrayMap(array, iteratee) {
   var index = -1,
-      length = array.length,
+      length = array ? array.length : 0,
       result = Array(length);
 
   while (++index < length) {
@@ -53,6 +161,2110 @@ function arrayMap(array, iteratee) {
   return result;
 }
 
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys,
+    nativeMax = Math.max;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.rest` which doesn't validate or coerce arguments.
+ *
+ * @private
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @returns {Function} Returns the new function.
+ */
+function baseRest(func, start) {
+  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+  return function() {
+    var args = arguments,
+        index = -1,
+        length = nativeMax(args.length - start, 0),
+        array = Array(length);
+
+    while (++index < length) {
+      array[index] = args[start + index];
+    }
+    index = -1;
+    var otherArgs = Array(start + 1);
+    while (++index < start) {
+      otherArgs[index] = args[index];
+    }
+    otherArgs[start] = array;
+    return apply(func, this, otherArgs);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * Creates a function that iterates over `pairs` and invokes the corresponding
  * function of the first predicate to return truthy. The predicate-function
@@ -70,7 +2282,7 @@ function arrayMap(array, iteratee) {
  * var func = _.cond([
  *   [_.matches({ 'a': 1 }),           _.constant('matches A')],
  *   [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
- *   [_.constant(true),                _.constant('no match')]
+ *   [_.stubTrue,                      _.constant('no match')]
  * ]);
  *
  * func({ 'a': 1, 'b': 2 });
@@ -93,7 +2305,7 @@ function cond(pairs) {
     return [toIteratee(pair[0]), pair[1]];
   });
 
-  return rest(function(args) {
+  return baseRest(function(args) {
     var index = -1;
     while (++index < length) {
       var pair = pairs[index];
@@ -104,4 +2316,50 @@ function cond(pairs) {
   });
 }
 
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = cond;
diff --git a/lodash.cond/package.json b/lodash.cond/package.json
index 75d660c74..56ead3881 100644
--- a/lodash.cond/package.json
+++ b/lodash.cond/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.cond",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.cond` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseiteratee": "~4.7.0",
-    "lodash.rest": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.conforms/README.md b/lodash.conforms/README.md
index b493b3636..b132e8d0c 100644
--- a/lodash.conforms/README.md
+++ b/lodash.conforms/README.md
@@ -1,4 +1,4 @@
-# lodash.conforms v4.4.1
+# lodash.conforms v4.5.0
 
 The [lodash](https://lodash.com/) method `_.conforms` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var conforms = require('lodash.conforms');
 ```
 
-See the [documentation](https://lodash.com/docs#conforms) or [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash.conforms) for more details.
+See the [documentation](https://lodash.com/docs#conforms) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.conforms) for more details.
diff --git a/lodash.conforms/index.js b/lodash.conforms/index.js
index fd15d1d32..c90d5c71c 100644
--- a/lodash.conforms/index.js
+++ b/lodash.conforms/index.js
@@ -48,7 +48,7 @@ var arrayBufferTag = '[object ArrayBuffer]',
 
 /**
  * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
@@ -188,19 +188,6 @@ function arrayReduce(array, iteratee, accumulator, initAccum) {
   return accumulator;
 }
 
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
 /**
  * The base implementation of `_.times` without support for iteratee shorthands
  * or max array length checks.
@@ -269,7 +256,7 @@ function mapToArray(map) {
 }
 
 /**
- * Creates a function that invokes `func` with its first argument transformed.
+ * Creates a unary function that invokes `func` with its argument transformed.
  *
  * @private
  * @param {Function} func The function to wrap.
@@ -301,6 +288,7 @@ function setToArray(set) {
 
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
+    funcProto = Function.prototype,
     objectProto = Object.prototype;
 
 /** Used to detect overreaching core-js shims. */
@@ -313,14 +301,14 @@ var maskSrcKey = (function() {
 }());
 
 /** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
+var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -335,15 +323,15 @@ var reIsNative = RegExp('^' +
 var Buffer = moduleExports ? root.Buffer : undefined,
     Symbol = root.Symbol,
     Uint8Array = root.Uint8Array,
+    getPrototype = overArg(Object.getPrototypeOf, Object),
     objectCreate = Object.create,
     propertyIsEnumerable = objectProto.propertyIsEnumerable,
     splice = arrayProto.splice;
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf,
-    nativeGetSymbols = Object.getOwnPropertySymbols,
+var nativeGetSymbols = Object.getOwnPropertySymbols,
     nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
-    nativeKeys = Object.keys;
+    nativeKeys = overArg(Object.keys, Object);
 
 /* Built-in method references that are verified to be native. */
 var DataView = getNative(root, 'DataView'),
@@ -760,9 +748,36 @@ Stack.prototype.get = stackGet;
 Stack.prototype.has = stackHas;
 Stack.prototype.set = stackSet;
 
+/**
+ * Creates an array of the enumerable property names of the array-like `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @param {boolean} inherited Specify returning inherited property names.
+ * @returns {Array} Returns the array of property names.
+ */
+function arrayLikeKeys(value, inherited) {
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
+  // Safari 9 makes `arguments.length` enumerable in strict mode.
+  var result = (isArray(value) || isArguments(value))
+    ? baseTimes(value.length, String)
+    : [];
+
+  var length = result.length,
+      skipIndexes = !!length;
+
+  for (var key in value) {
+    if ((inherited || hasOwnProperty.call(value, key)) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * Assigns `value` to `key` of `object` if the existing value is not equivalent
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * for equality comparisons.
  *
  * @private
@@ -782,7 +797,7 @@ function assignValue(object, key, value) {
  * Gets the index at which the `key` is found in `array` of key-value pairs.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} key The key to search for.
  * @returns {number} Returns the index of the matched value, else `-1`.
  */
@@ -911,14 +926,13 @@ function baseConformsTo(object, source, props) {
   if (object == null) {
     return !length;
   }
-  var index = length;
-  while (index--) {
-    var key = props[index],
+  object = Object(object);
+  while (length--) {
+    var key = props[length],
         predicate = source[key],
         value = object[key];
 
-    if ((value === undefined &&
-        !(key in Object(object))) || !predicate(value)) {
+    if ((value === undefined && !(key in object)) || !predicate(value)) {
       return false;
     }
   }
@@ -964,23 +978,6 @@ function baseGetTag(value) {
   return objectToString.call(value);
 }
 
-/**
- * The base implementation of `_.has` without support for deep paths.
- *
- * @private
- * @param {Object} [object] The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
-function baseHas(object, key) {
-  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
-  // that are composed entirely of index properties, return `false` for
-  // `hasOwnProperty` checks of them.
-  return object != null &&
-    (hasOwnProperty.call(object, key) ||
-      (typeof object == 'object' && key in object && getPrototype(object) === null));
-}
-
 /**
  * The base implementation of `_.isNative` without bad shim checks.
  *
@@ -998,14 +995,24 @@ function baseIsNative(value) {
 }
 
 /**
- * The base implementation of `_.keys` which doesn't skip the constructor
- * property of prototypes or treat sparse arrays as dense.
+ * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
  *
  * @private
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of property names.
  */
-var baseKeys = overArg(nativeKeys, Object);
+function baseKeys(object) {
+  if (!isPrototype(object)) {
+    return nativeKeys(object);
+  }
+  var result = [];
+  for (var key in Object(object)) {
+    if (hasOwnProperty.call(object, key) && key != 'constructor') {
+      result.push(key);
+    }
+  }
+  return result;
+}
 
 /**
  * Creates a clone of  `buffer`.
@@ -1185,19 +1192,6 @@ function getAllKeys(object) {
   return baseGetAllKeys(object, keys, getSymbols);
 }
 
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
 /**
  * Gets the data for `map`.
  *
@@ -1226,15 +1220,6 @@ function getNative(object, key) {
   return baseIsNative(value) ? value : undefined;
 }
 
-/**
- * Gets the `[[Prototype]]` of `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {null|Object} Returns the `[[Prototype]]`.
- */
-var getPrototype = overArg(nativeGetPrototype, Object);
-
 /**
  * Creates an array of the own enumerable symbol properties of `object`.
  *
@@ -1254,7 +1239,7 @@ var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArra
 var getTag = baseGetTag;
 
 // Fallback for data views, maps, sets, and weak maps in IE 11,
-// for data views in Edge, and promises in Node.js.
+// for data views in Edge < 14, and promises in Node.js.
 if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
     (Map && getTag(new Map) != mapTag) ||
     (Promise && getTag(Promise.resolve()) != promiseTag) ||
@@ -1359,23 +1344,6 @@ function initCloneByTag(object, tag, cloneFunc, isDeep) {
   }
 }
 
-/**
- * Creates an array of index keys for `object` values of arrays,
- * `arguments` objects, and strings, otherwise `null` is returned.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array|null} Returns index keys, else `null`.
- */
-function indexKeys(object) {
-  var length = object ? object.length : undefined;
-  if (isLength(length) &&
-      (isArray(object) || isString(object) || isArguments(object))) {
-    return baseTimes(length, String);
-  }
-  return null;
-}
-
 /**
  * Checks if `value` is a valid array-like index.
  *
@@ -1451,7 +1419,7 @@ function toSource(func) {
 
 /**
  * Performs a
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * comparison between two values to determine if they are equivalent.
  *
  * @static
@@ -1504,7 +1472,7 @@ function eq(value, other) {
  * // => false
  */
 function isArguments(value) {
-  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
   return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
     (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
@@ -1560,7 +1528,7 @@ var isArray = Array.isArray;
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -1630,8 +1598,7 @@ var isBuffer = nativeIsBuffer || stubFalse;
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -1639,16 +1606,15 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);
@@ -1670,7 +1636,7 @@ function isLength(value) {
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
@@ -1726,33 +1692,11 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
-/**
- * Checks if `value` is classified as a `String` primitive or object.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a string, else `false`.
- * @example
- *
- * _.isString('abc');
- * // => true
- *
- * _.isString(1);
- * // => false
- */
-function isString(value) {
-  return typeof value == 'string' ||
-    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
-}
-
 /**
  * Creates an array of the own enumerable property names of `object`.
  *
  * **Note:** Non-object values are coerced to objects. See the
- * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
  * for more details.
  *
  * @static
@@ -1777,23 +1721,7 @@ function isString(value) {
  * // => ['0', '1']
  */
 function keys(object) {
-  var isProto = isPrototype(object);
-  if (!(isProto || isArrayLike(object))) {
-    return baseKeys(object);
-  }
-  var indexes = indexKeys(object),
-      skipIndexes = !!indexes,
-      result = indexes || [],
-      length = result.length;
-
-  for (var key in object) {
-    if (baseHas(object, key) &&
-        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
-        !(isProto && key == 'constructor')) {
-      result.push(key);
-    }
-  }
-  return result;
+  return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
 }
 
 /**
diff --git a/lodash.conforms/package.json b/lodash.conforms/package.json
index 24ad76c02..e95e79ce7 100644
--- a/lodash.conforms/package.json
+++ b/lodash.conforms/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.conforms",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The lodash method `_.conforms` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.countby/README.md b/lodash.countby/README.md
index bde5c95e2..c6ec5e9bd 100644
--- a/lodash.countby/README.md
+++ b/lodash.countby/README.md
@@ -1,4 +1,4 @@
-# lodash.countby v4.4.0
+# lodash.countby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.countBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var countBy = require('lodash.countby');
 ```
 
-See the [documentation](https://lodash.com/docs#countBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.countby) for more details.
+See the [documentation](https://lodash.com/docs#countBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.countby) for more details.
diff --git a/lodash.countby/index.js b/lodash.countby/index.js
index f26fab4a5..645e0f7f0 100644
--- a/lodash.countby/index.js
+++ b/lodash.countby/index.js
@@ -6,14 +6,126 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseEach = require('lodash._baseeach'),
-    baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
 
 /**
  * A specialized version of `baseAggregator` for arrays.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} setter The function to set `accumulator` values.
  * @param {Function} iteratee The iteratee to transform keys.
  * @param {Object} accumulator The initial aggregated object.
@@ -21,7 +133,7 @@ var baseEach = require('lodash._baseeach'),
  */
 function arrayAggregator(array, setter, iteratee, accumulator) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     var value = array[index];
@@ -30,12 +142,678 @@ function arrayAggregator(array, setter, iteratee, accumulator) {
   return accumulator;
 }
 
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
 /**
  * Aggregates elements of `collection` on `accumulator` with keys transformed
  * by `iteratee` and values set by `setter`.
@@ -54,6 +832,381 @@ function baseAggregator(collection, setter, iteratee, accumulator) {
   return accumulator;
 }
 
+/**
+ * The base implementation of `_.forEach` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ */
+var baseEach = createBaseEach(baseForOwn);
+
+/**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
+
+/**
+ * The base implementation of `_.forOwn` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+function baseForOwn(object, iteratee) {
+  return object && baseFor(object, iteratee, keys);
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
 /**
  * Creates a function like `_.groupBy`.
  *
@@ -67,10 +1220,604 @@ function createAggregator(setter, initializer) {
     var func = isArray(collection) ? arrayAggregator : baseAggregator,
         accumulator = initializer ? initializer() : {};
 
-    return func(collection, setter, baseIteratee(iteratee), accumulator);
+    return func(collection, setter, baseIteratee(iteratee, 2), accumulator);
   };
 }
 
+/**
+ * Creates a `baseEach` or `baseEachRight` function.
+ *
+ * @private
+ * @param {Function} eachFunc The function to iterate over a collection.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseEach(eachFunc, fromRight) {
+  return function(collection, iteratee) {
+    if (collection == null) {
+      return collection;
+    }
+    if (!isArrayLike(collection)) {
+      return eachFunc(collection, iteratee);
+    }
+    var length = collection.length,
+        index = fromRight ? length : -1,
+        iterable = Object(collection);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (iteratee(iterable[index], index, iterable) === false) {
+        break;
+      }
+    }
+    return collection;
+  };
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Creates an object composed of keys generated from the results of running
  * each element of `collection` thru `iteratee`. The corresponding value of
@@ -82,7 +1829,7 @@ function createAggregator(setter, initializer) {
  * @since 0.5.0
  * @category Collection
  * @param {Array|Object} collection The collection to iterate over.
- * @param {Array|Function|Object|string} [iteratee=_.identity]
+ * @param {Function} [iteratee=_.identity]
  *  The iteratee to transform keys.
  * @returns {Object} Returns the composed aggregate object.
  * @example
@@ -90,6 +1837,7 @@ function createAggregator(setter, initializer) {
  * _.countBy([6.1, 4.2, 6.3], Math.floor);
  * // => { '4': 1, '6': 2 }
  *
+ * // The `_.property` iteratee shorthand.
  * _.countBy(['one', 'two', 'three'], 'length');
  * // => { '3': 2, '5': 1 }
  */
@@ -97,17 +1845,142 @@ var countBy = createAggregator(function(result, value, key) {
   hasOwnProperty.call(result, key) ? ++result[key] : (result[key] = 1);
 });
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -124,4 +1997,419 @@ var countBy = createAggregator(function(result, value, key) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = countBy;
diff --git a/lodash.countby/package.json b/lodash.countby/package.json
index 68170d479..d8d7e3194 100644
--- a/lodash.countby/package.json
+++ b/lodash.countby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.countby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.countBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseeach": "~4.1.0",
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.defaultsdeep/README.md b/lodash.defaultsdeep/README.md
index 8876e4a9d..6de1a285c 100644
--- a/lodash.defaultsdeep/README.md
+++ b/lodash.defaultsdeep/README.md
@@ -1,4 +1,4 @@
-# lodash.defaultsdeep v4.4.0
+# lodash.defaultsdeep v4.5.0
 
 The [lodash](https://lodash.com/) method `_.defaultsDeep` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var defaultsDeep = require('lodash.defaultsdeep');
 ```
 
-See the [documentation](https://lodash.com/docs#defaultsDeep) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.defaultsdeep) for more details.
+See the [documentation](https://lodash.com/docs#defaultsDeep) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.defaultsdeep) for more details.
diff --git a/lodash.defaultsdeep/index.js b/lodash.defaultsdeep/index.js
index b31479b2f..c0ce430de 100644
--- a/lodash.defaultsdeep/index.js
+++ b/lodash.defaultsdeep/index.js
@@ -6,12 +6,6 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseClone = require('lodash._baseclone'),
-    isPlainObject = require('lodash.isplainobject'),
-    keysIn = require('lodash.keysin'),
-    mergeWith = require('lodash.mergewith'),
-    rest = require('lodash.rest'),
-    root = require('lodash._root');
 
 /** Used as the size to enable large array optimizations. */
 var LARGE_ARRAY_SIZE = 200;
@@ -33,9 +27,11 @@ var argsTag = '[object Arguments]',
     mapTag = '[object Map]',
     numberTag = '[object Number]',
     objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
     regexpTag = '[object RegExp]',
     setTag = '[object Set]',
     stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
     weakMapTag = '[object WeakMap]';
 
 var arrayBufferTag = '[object ArrayBuffer]',
@@ -56,9 +52,15 @@ var arrayBufferTag = '[object ArrayBuffer]',
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
+/** Used to match `RegExp` flags from their coerced string values. */
+var reFlags = /\w*$/;
+
 /** Used to detect host constructors (Safari). */
 var reIsHostCtor = /^\[object .+?Constructor\]$/;
 
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
 /** Used to identify `toStringTag` values of typed arrays. */
 var typedArrayTags = {};
 typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
@@ -75,6 +77,81 @@ typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
 typedArrayTags[setTag] = typedArrayTags[stringTag] =
 typedArrayTags[weakMapTag] = false;
 
+/** Used to identify `toStringTag` values supported by `_.clone`. */
+var cloneableTags = {};
+cloneableTags[argsTag] = cloneableTags[arrayTag] =
+cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
+cloneableTags[boolTag] = cloneableTags[dateTag] =
+cloneableTags[float32Tag] = cloneableTags[float64Tag] =
+cloneableTags[int8Tag] = cloneableTags[int16Tag] =
+cloneableTags[int32Tag] = cloneableTags[mapTag] =
+cloneableTags[numberTag] = cloneableTags[objectTag] =
+cloneableTags[regexpTag] = cloneableTags[setTag] =
+cloneableTags[stringTag] = cloneableTags[symbolTag] =
+cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
+cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
+cloneableTags[errorTag] = cloneableTags[funcTag] =
+cloneableTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * Adds the key-value `pair` to `map`.
+ *
+ * @private
+ * @param {Object} map The map to modify.
+ * @param {Array} pair The key-value pair to add.
+ * @returns {Object} Returns `map`.
+ */
+function addMapEntry(map, pair) {
+  // Don't return `map.set` because it's not chainable in IE 11.
+  map.set(pair[0], pair[1]);
+  return map;
+}
+
+/**
+ * Adds `value` to `set`.
+ *
+ * @private
+ * @param {Object} set The set to modify.
+ * @param {*} value The value to add.
+ * @returns {Object} Returns `set`.
+ */
+function addSetEntry(set, value) {
+  // Don't return `set.add` because it's not chainable in IE 11.
+  set.add(value);
+  return set;
+}
+
 /**
  * A faster alternative to `Function#apply`, this function invokes `func`
  * with the `this` binding of `thisArg` and the arguments of `args`.
@@ -86,8 +163,7 @@ typedArrayTags[weakMapTag] = false;
  * @returns {*} Returns the result of `func`.
  */
 function apply(func, thisArg, args) {
-  var length = args.length;
-  switch (length) {
+  switch (args.length) {
     case 0: return func.call(thisArg);
     case 1: return func.call(thisArg, args[0]);
     case 2: return func.call(thisArg, args[0], args[1]);
@@ -101,13 +177,13 @@ function apply(func, thisArg, args) {
  * iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @returns {Array} Returns `array`.
  */
 function arrayEach(array, iteratee) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     if (iteratee(array[index], index, array) === false) {
@@ -117,6 +193,107 @@ function arrayEach(array, iteratee) {
   return array;
 }
 
+/**
+ * Appends the elements of `values` to `array`.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {Array} values The values to append.
+ * @returns {Array} Returns `array`.
+ */
+function arrayPush(array, values) {
+  var index = -1,
+      length = values.length,
+      offset = array.length;
+
+  while (++index < length) {
+    array[offset + index] = values[index];
+  }
+  return array;
+}
+
+/**
+ * A specialized version of `_.reduce` for arrays without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {*} [accumulator] The initial value.
+ * @param {boolean} [initAccum] Specify using the first element of `array` as
+ *  the initial value.
+ * @returns {*} Returns the accumulated value.
+ */
+function arrayReduce(array, iteratee, accumulator, initAccum) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  if (initAccum && length) {
+    accumulator = array[++index];
+  }
+  while (++index < length) {
+    accumulator = iteratee(accumulator, array[index], index, array);
+  }
+  return accumulator;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
 /**
  * Checks if `value` is a host object in IE < 9.
  *
@@ -136,16 +313,93 @@ function isHostObject(value) {
   return result;
 }
 
+/**
+ * Converts `iterator` to an array.
+ *
+ * @private
+ * @param {Object} iterator The iterator to convert.
+ * @returns {Array} Returns the converted array.
+ */
+function iteratorToArray(iterator) {
+  var data,
+      result = [];
+
+  while (!(data = iterator.next()).done) {
+    result.push(data.value);
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
     objectProto = Object.prototype;
 
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
 /** Used to resolve the decompiled source of functions. */
 var funcToString = Function.prototype.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
+/** Used to infer the `Object` constructor. */
+var objectCtorString = funcToString.call(Object);
+
 /**
  * Used to resolve the
  * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
@@ -160,13 +414,41 @@ var reIsNative = RegExp('^' +
 );
 
 /** Built-in value references. */
-var propertyIsEnumerable = objectProto.propertyIsEnumerable,
+var Buffer = moduleExports ? root.Buffer : undefined,
+    Reflect = root.Reflect,
+    Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    enumerate = Reflect ? Reflect.enumerate : undefined,
+    objectCreate = Object.create,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
     splice = arrayProto.splice;
 
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeGetSymbols = Object.getOwnPropertySymbols,
+    nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
+    nativeKeys = Object.keys,
+    nativeMax = Math.max;
+
 /* Built-in method references that are verified to be native. */
-var Map = getNative(root, 'Map'),
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
     nativeCreate = getNative(Object, 'create');
 
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;
+
 /**
  * Creates a hash object.
  *
@@ -544,8 +826,13 @@ function stackHas(key) {
  */
 function stackSet(key, value) {
   var cache = this.__data__;
-  if (cache instanceof ListCache && cache.__data__.length == LARGE_ARRAY_SIZE) {
-    cache = this.__data__ = new MapCache(cache.__data__);
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
   }
   cache.set(key, value);
   return this;
@@ -610,6 +897,216 @@ function assocIndexOf(array, key) {
   return -1;
 }
 
+/**
+ * The base implementation of `_.assign` without support for multiple sources
+ * or `customizer` functions.
+ *
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @returns {Object} Returns `object`.
+ */
+function baseAssign(object, source) {
+  return object && copyObject(source, keys(source), object);
+}
+
+/**
+ * The base implementation of `_.clone` and `_.cloneDeep` which tracks
+ * traversed objects.
+ *
+ * @private
+ * @param {*} value The value to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @param {boolean} [isFull] Specify a clone including symbols.
+ * @param {Function} [customizer] The function to customize cloning.
+ * @param {string} [key] The key of `value`.
+ * @param {Object} [object] The parent object of `value`.
+ * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
+ * @returns {*} Returns the cloned value.
+ */
+function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
+  var result;
+  if (customizer) {
+    result = object ? customizer(value, key, object, stack) : customizer(value);
+  }
+  if (result !== undefined) {
+    return result;
+  }
+  if (!isObject(value)) {
+    return value;
+  }
+  var isArr = isArray(value);
+  if (isArr) {
+    result = initCloneArray(value);
+    if (!isDeep) {
+      return copyArray(value, result);
+    }
+  } else {
+    var tag = getTag(value),
+        isFunc = tag == funcTag || tag == genTag;
+
+    if (isBuffer(value)) {
+      return cloneBuffer(value, isDeep);
+    }
+    if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
+      if (isHostObject(value)) {
+        return object ? value : {};
+      }
+      result = initCloneObject(isFunc ? {} : value);
+      if (!isDeep) {
+        return copySymbols(value, baseAssign(result, value));
+      }
+    } else {
+      if (!cloneableTags[tag]) {
+        return object ? value : {};
+      }
+      result = initCloneByTag(value, tag, baseClone, isDeep);
+    }
+  }
+  // Check for circular references and return its corresponding clone.
+  stack || (stack = new Stack);
+  var stacked = stack.get(value);
+  if (stacked) {
+    return stacked;
+  }
+  stack.set(value, result);
+
+  if (!isArr) {
+    var props = isFull ? getAllKeys(value) : keys(value);
+  }
+  arrayEach(props || value, function(subValue, key) {
+    if (props) {
+      key = subValue;
+      subValue = value[key];
+    }
+    // Recursively populate clone (susceptible to call stack limits).
+    assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
+  });
+  if (!isFull) {
+    stack['delete'](value);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.create` without support for assigning
+ * properties to the created object.
+ *
+ * @private
+ * @param {Object} prototype The object to inherit from.
+ * @returns {Object} Returns the new object.
+ */
+function baseCreate(proto) {
+  return isObject(proto) ? objectCreate(proto) : {};
+}
+
+/**
+ * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
+ * `keysFunc` and `symbolsFunc` to get the enumerable property names and
+ * symbols of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @param {Function} symbolsFunc The function to get the symbols of `object`.
+ * @returns {Array} Returns the array of property names and symbols.
+ */
+function baseGetAllKeys(object, keysFunc, symbolsFunc) {
+  var result = keysFunc(object);
+  return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.keysIn` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+function baseKeysIn(object) {
+  object = object == null ? object : Object(object);
+
+  var result = [];
+  for (var key in object) {
+    result.push(key);
+  }
+  return result;
+}
+
+// Fallback for IE < 9 with es6-shim.
+if (enumerate && !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf')) {
+  baseKeysIn = function(object) {
+    return iteratorToArray(enumerate(object));
+  };
+}
+
 /**
  * The base implementation of `_.merge` without support for multiple sources.
  *
@@ -710,29 +1207,152 @@ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, sta
       isCommon = false;
     }
   }
-  stack.set(srcValue, newValue);
-
   if (isCommon) {
     // Recursively merge objects and arrays (susceptible to call stack limits).
+    stack.set(srcValue, newValue);
     mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
+    stack['delete'](srcValue);
   }
-  stack['delete'](srcValue);
   assignMergeValue(object, key, newValue);
 }
 
 /**
- * The base implementation of `_.property` without support for deep paths.
+ * The base implementation of `_.rest` which doesn't validate or coerce arguments.
  *
  * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @returns {Function} Returns the new function.
  */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
+function baseRest(func, start) {
+  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+  return function() {
+    var args = arguments,
+        index = -1,
+        length = nativeMax(args.length - start, 0),
+        array = Array(length);
+
+    while (++index < length) {
+      array[index] = args[start + index];
+    }
+    index = -1;
+    var otherArgs = Array(start + 1);
+    while (++index < start) {
+      otherArgs[index] = args[index];
+    }
+    otherArgs[start] = array;
+    return apply(func, this, otherArgs);
   };
 }
 
+/**
+ * Creates a clone of  `buffer`.
+ *
+ * @private
+ * @param {Buffer} buffer The buffer to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Buffer} Returns the cloned buffer.
+ */
+function cloneBuffer(buffer, isDeep) {
+  if (isDeep) {
+    return buffer.slice();
+  }
+  var result = new buffer.constructor(buffer.length);
+  buffer.copy(result);
+  return result;
+}
+
+/**
+ * Creates a clone of `arrayBuffer`.
+ *
+ * @private
+ * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
+ * @returns {ArrayBuffer} Returns the cloned array buffer.
+ */
+function cloneArrayBuffer(arrayBuffer) {
+  var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
+  new Uint8Array(result).set(new Uint8Array(arrayBuffer));
+  return result;
+}
+
+/**
+ * Creates a clone of `dataView`.
+ *
+ * @private
+ * @param {Object} dataView The data view to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned data view.
+ */
+function cloneDataView(dataView, isDeep) {
+  var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
+  return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
+}
+
+/**
+ * Creates a clone of `map`.
+ *
+ * @private
+ * @param {Object} map The map to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned map.
+ */
+function cloneMap(map, isDeep, cloneFunc) {
+  var array = isDeep ? cloneFunc(mapToArray(map), true) : mapToArray(map);
+  return arrayReduce(array, addMapEntry, new map.constructor);
+}
+
+/**
+ * Creates a clone of `regexp`.
+ *
+ * @private
+ * @param {Object} regexp The regexp to clone.
+ * @returns {Object} Returns the cloned regexp.
+ */
+function cloneRegExp(regexp) {
+  var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
+  result.lastIndex = regexp.lastIndex;
+  return result;
+}
+
+/**
+ * Creates a clone of `set`.
+ *
+ * @private
+ * @param {Object} set The set to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned set.
+ */
+function cloneSet(set, isDeep, cloneFunc) {
+  var array = isDeep ? cloneFunc(setToArray(set), true) : setToArray(set);
+  return arrayReduce(array, addSetEntry, new set.constructor);
+}
+
+/**
+ * Creates a clone of the `symbol` object.
+ *
+ * @private
+ * @param {Object} symbol The symbol object to clone.
+ * @returns {Object} Returns the cloned symbol object.
+ */
+function cloneSymbol(symbol) {
+  return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
+}
+
+/**
+ * Creates a clone of `typedArray`.
+ *
+ * @private
+ * @param {Object} typedArray The typed array to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned typed array.
+ */
+function cloneTypedArray(typedArray, isDeep) {
+  var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
+  return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
+}
+
 /**
  * Copies the values of `source` to `array`.
  *
@@ -773,13 +1393,69 @@ function copyObject(source, props, object, customizer) {
 
     var newValue = customizer
       ? customizer(object[key], source[key], key, object, source)
-      : source[key];
+      : undefined;
 
-    assignValue(object, key, newValue);
+    assignValue(object, key, newValue === undefined ? source[key] : newValue);
   }
   return object;
 }
 
+/**
+ * Copies own symbol properties of `source` to `object`.
+ *
+ * @private
+ * @param {Object} source The object to copy symbols from.
+ * @param {Object} [object={}] The object to copy symbols to.
+ * @returns {Object} Returns `object`.
+ */
+function copySymbols(source, object) {
+  return copyObject(source, getSymbols(source), object);
+}
+
+/**
+ * Creates a function like `_.assign`.
+ *
+ * @private
+ * @param {Function} assigner The function to assign values.
+ * @returns {Function} Returns the new assigner function.
+ */
+function createAssigner(assigner) {
+  return baseRest(function(object, sources) {
+    var index = -1,
+        length = sources.length,
+        customizer = length > 1 ? sources[length - 1] : undefined,
+        guard = length > 2 ? sources[2] : undefined;
+
+    customizer = (assigner.length > 3 && typeof customizer == 'function')
+      ? (length--, customizer)
+      : undefined;
+
+    if (guard && isIterateeCall(sources[0], sources[1], guard)) {
+      customizer = length < 3 ? undefined : customizer;
+      length = 1;
+    }
+    object = Object(object);
+    while (++index < length) {
+      var source = sources[index];
+      if (source) {
+        assigner(object, source, index, customizer);
+      }
+    }
+    return object;
+  });
+}
+
+/**
+ * Creates an array of own enumerable property names and symbols of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names and symbols.
+ */
+function getAllKeys(object) {
+  return baseGetAllKeys(object, keys, getSymbols);
+}
+
 /**
  * Gets the "length" property value of `object`.
  *
@@ -817,8 +1493,197 @@ function getMapData(map, key) {
  * @returns {*} Returns the function if it's native, else `undefined`.
  */
 function getNative(object, key) {
-  var value = object[key];
-  return isNative(value) ? value : undefined;
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Creates an array of the own enumerable symbol properties of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of symbols.
+ */
+var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArray;
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Initializes an array clone.
+ *
+ * @private
+ * @param {Array} array The array to clone.
+ * @returns {Array} Returns the initialized clone.
+ */
+function initCloneArray(array) {
+  var length = array.length,
+      result = array.constructor(length);
+
+  // Add properties assigned by `RegExp#exec`.
+  if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
+    result.index = array.index;
+    result.input = array.input;
+  }
+  return result;
+}
+
+/**
+ * Initializes an object clone.
+ *
+ * @private
+ * @param {Object} object The object to clone.
+ * @returns {Object} Returns the initialized clone.
+ */
+function initCloneObject(object) {
+  return (typeof object.constructor == 'function' && !isPrototype(object))
+    ? baseCreate(getPrototype(object))
+    : {};
+}
+
+/**
+ * Initializes an object clone based on its `toStringTag`.
+ *
+ * **Note:** This function only supports cloning values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to clone.
+ * @param {string} tag The `toStringTag` of the object to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the initialized clone.
+ */
+function initCloneByTag(object, tag, cloneFunc, isDeep) {
+  var Ctor = object.constructor;
+  switch (tag) {
+    case arrayBufferTag:
+      return cloneArrayBuffer(object);
+
+    case boolTag:
+    case dateTag:
+      return new Ctor(+object);
+
+    case dataViewTag:
+      return cloneDataView(object, isDeep);
+
+    case float32Tag: case float64Tag:
+    case int8Tag: case int16Tag: case int32Tag:
+    case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
+      return cloneTypedArray(object, isDeep);
+
+    case mapTag:
+      return cloneMap(object, isDeep, cloneFunc);
+
+    case numberTag:
+    case stringTag:
+      return new Ctor(object);
+
+    case regexpTag:
+      return cloneRegExp(object);
+
+    case setTag:
+      return cloneSet(object, isDeep, cloneFunc);
+
+    case symbolTag:
+      return cloneSymbol(object);
+  }
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if the given arguments are from an iteratee call.
+ *
+ * @private
+ * @param {*} value The potential iteratee value argument.
+ * @param {*} index The potential iteratee index or key argument.
+ * @param {*} object The potential iteratee object argument.
+ * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
+ *  else `false`.
+ */
+function isIterateeCall(value, index, object) {
+  if (!isObject(object)) {
+    return false;
+  }
+  var type = typeof index;
+  if (type == 'number'
+        ? (isArrayLike(object) && isIndex(index, object.length))
+        : (type == 'string' && index in object)
+      ) {
+    return eq(object[index], value);
+  }
+  return false;
 }
 
 /**
@@ -835,6 +1700,31 @@ function isKeyable(value) {
     : (value === null);
 }
 
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
 /**
  * Used by `_.defaultsDeep` to customize its `_.merge` use.
  *
@@ -850,7 +1740,10 @@ function isKeyable(value) {
  */
 function mergeDefaults(objValue, srcValue, key, object, source, stack) {
   if (isObject(objValue) && isObject(srcValue)) {
-    baseMerge(objValue, srcValue, undefined, mergeDefaults, stack.set(srcValue, objValue));
+    // Recursively merge objects and arrays (susceptible to call stack limits).
+    stack.set(srcValue, objValue);
+    baseMerge(objValue, srcValue, undefined, mergeDefaults, stack);
+    stack['delete'](srcValue);
   }
   return objValue;
 }
@@ -888,8 +1781,8 @@ function toSource(func) {
  * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  * @example
  *
- * var object = { 'user': 'fred' };
- * var other = { 'user': 'fred' };
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
  *
  * _.eq(object, object);
  * // => true
@@ -918,7 +1811,7 @@ function eq(value, other) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
  *  else `false`.
  * @example
  *
@@ -940,11 +1833,9 @@ function isArguments(value) {
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -1019,6 +1910,25 @@ function isArrayLikeObject(value) {
   return isObjectLike(value) && isArrayLike(value);
 }
 
+/**
+ * Checks if `value` is a buffer.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.3.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
+ * @example
+ *
+ * _.isBuffer(new Buffer(2));
+ * // => true
+ *
+ * _.isBuffer(new Uint8Array(2));
+ * // => false
+ */
+var isBuffer = nativeIsBuffer || stubFalse;
+
 /**
  * Checks if `value` is classified as a `Function` object.
  *
@@ -1027,8 +1937,7 @@ function isArrayLikeObject(value) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -1136,29 +2045,68 @@ function isObjectLike(value) {
 }
 
 /**
- * Checks if `value` is a native function.
+ * Checks if `value` is a plain object, that is, an object created by the
+ * `Object` constructor or one with a `[[Prototype]]` of `null`.
  *
  * @static
  * @memberOf _
- * @since 3.0.0
+ * @since 0.8.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a native function,
+ * @returns {boolean} Returns `true` if `value` is a plain object,
  *  else `false`.
  * @example
  *
- * _.isNative(Array.prototype.push);
+ * function Foo() {
+ *   this.a = 1;
+ * }
+ *
+ * _.isPlainObject(new Foo);
+ * // => false
+ *
+ * _.isPlainObject([1, 2, 3]);
+ * // => false
+ *
+ * _.isPlainObject({ 'x': 0, 'y': 0 });
  * // => true
  *
- * _.isNative(_);
- * // => false
+ * _.isPlainObject(Object.create(null));
+ * // => true
  */
-function isNative(value) {
-  if (!isObject(value)) {
+function isPlainObject(value) {
+  if (!isObjectLike(value) ||
+      objectToString.call(value) != objectTag || isHostObject(value)) {
     return false;
   }
-  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
-  return pattern.test(toSource(value));
+  var proto = getPrototype(value);
+  if (proto === null) {
+    return true;
+  }
+  var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
+  return (typeof Ctor == 'function' &&
+    Ctor instanceof Ctor && funcToString.call(Ctor) == objectCtorString);
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
 }
 
 /**
@@ -1169,8 +2117,7 @@ function isNative(value) {
  * @since 3.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
  * @example
  *
  * _.isTypedArray(new Uint8Array);
@@ -1179,10 +2126,7 @@ function isNative(value) {
  * _.isTypedArray([]);
  * // => false
  */
-function isTypedArray(value) {
-  return isObjectLike(value) &&
-    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
-}
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
 
 /**
  * Converts `value` to a plain object flattening inherited enumerable string
@@ -1228,13 +2172,177 @@ function toPlainObject(value) {
  * @see _.defaults
  * @example
  *
- * _.defaultsDeep({ 'user': { 'name': 'barney' } }, { 'user': { 'name': 'fred', 'age': 36 } });
- * // => { 'user': { 'name': 'barney', 'age': 36 } }
- *
+ * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });
+ * // => { 'a': { 'b': 2, 'c': 3 } }
  */
-var defaultsDeep = rest(function(args) {
+var defaultsDeep = baseRest(function(args) {
   args.push(undefined, mergeDefaults);
   return apply(mergeWith, undefined, args);
 });
 
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * Creates an array of the own and inherited enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keysIn(new Foo);
+ * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
+ */
+function keysIn(object) {
+  var index = -1,
+      isProto = isPrototype(object),
+      props = baseKeysIn(object),
+      propsLength = props.length,
+      indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  while (++index < propsLength) {
+    var key = props[index];
+    if (!(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method is like `_.merge` except that it accepts `customizer` which
+ * is invoked to produce the merged values of the destination and source
+ * properties. If `customizer` returns `undefined`, merging is handled by the
+ * method instead. The `customizer` is invoked with seven arguments:
+ * (objValue, srcValue, key, object, source, stack).
+ *
+ * **Note:** This method mutates `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The destination object.
+ * @param {...Object} sources The source objects.
+ * @param {Function} customizer The function to customize assigned values.
+ * @returns {Object} Returns `object`.
+ * @example
+ *
+ * function customizer(objValue, srcValue) {
+ *   if (_.isArray(objValue)) {
+ *     return objValue.concat(srcValue);
+ *   }
+ * }
+ *
+ * var object = { 'a': [1], 'b': [2] };
+ * var other = { 'a': [3], 'b': [4] };
+ *
+ * _.mergeWith(object, other, customizer);
+ * // => { 'a': [1, 3], 'b': [2, 4] }
+ */
+var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {
+  baseMerge(object, source, srcIndex, customizer);
+});
+
+/**
+ * This method returns a new empty array.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {Array} Returns the new empty array.
+ * @example
+ *
+ * var arrays = _.times(2, _.stubArray);
+ *
+ * console.log(arrays);
+ * // => [[], []]
+ *
+ * console.log(arrays[0] === arrays[1]);
+ * // => false
+ */
+function stubArray() {
+  return [];
+}
+
+/**
+ * This method returns `false`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {boolean} Returns `false`.
+ * @example
+ *
+ * _.times(2, _.stubFalse);
+ * // => [false, false]
+ */
+function stubFalse() {
+  return false;
+}
+
 module.exports = defaultsDeep;
diff --git a/lodash.defaultsdeep/package.json b/lodash.defaultsdeep/package.json
index 51d9c030c..0f91a6f60 100644
--- a/lodash.defaultsdeep/package.json
+++ b/lodash.defaultsdeep/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.defaultsdeep",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.defaultsDeep` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,13 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseclone": "~4.5.0",
-    "lodash._root": "~3.0.0",
-    "lodash.isplainobject": "^4.0.0",
-    "lodash.keysin": "^4.0.0",
-    "lodash.mergewith": "^4.0.0",
-    "lodash.rest": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.difference/README.md b/lodash.difference/README.md
index 10d8b6b94..be954fd81 100644
--- a/lodash.difference/README.md
+++ b/lodash.difference/README.md
@@ -1,4 +1,4 @@
-# lodash.difference v4.4.0
+# lodash.difference v4.5.0
 
 The [lodash](https://lodash.com/) method `_.difference` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var difference = require('lodash.difference');
 ```
 
-See the [documentation](https://lodash.com/docs#difference) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.difference) for more details.
+See the [documentation](https://lodash.com/docs#difference) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.difference) for more details.
diff --git a/lodash.difference/index.js b/lodash.difference/index.js
index c9b259036..4c0b61f7b 100644
--- a/lodash.difference/index.js
+++ b/lodash.difference/index.js
@@ -23,7 +23,7 @@ var argsTag = '[object Arguments]',
 
 /**
  * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
@@ -64,7 +64,7 @@ function apply(func, thisArg, args) {
  * specifying an index to search from.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
  */
@@ -77,7 +77,7 @@ function arrayIncludes(array, value) {
  * This function is like `arrayIncludes` except that it accepts a comparator.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @param {Function} comparator The comparator invoked per element.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
@@ -138,7 +138,7 @@ function arrayPush(array, values) {
  * support for iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {Function} predicate The function invoked per iteration.
  * @param {number} fromIndex The index to search from.
  * @param {boolean} [fromRight] Specify iterating from right to left.
@@ -160,7 +160,7 @@ function baseFindIndex(array, predicate, fromIndex, fromRight) {
  * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} value The value to search for.
  * @param {number} fromIndex The index to search from.
  * @returns {number} Returns the index of the matched value, else `-1`.
@@ -191,19 +191,6 @@ function baseIsNaN(value) {
   return value !== value;
 }
 
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
 /**
  * The base implementation of `_.unary` without support for storing metadata.
  *
@@ -262,6 +249,7 @@ function isHostObject(value) {
 
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
+    funcProto = Function.prototype,
     objectProto = Object.prototype;
 
 /** Used to detect overreaching core-js shims. */
@@ -274,14 +262,14 @@ var maskSrcKey = (function() {
 }());
 
 /** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
+var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -663,7 +651,7 @@ SetCache.prototype.has = setCacheHas;
  * Gets the index at which the `key` is found in `array` of key-value pairs.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} key The key to search for.
  * @returns {number} Returns the index of the matched value, else `-1`.
  */
@@ -812,19 +800,6 @@ function baseRest(func, start) {
   };
 }
 
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
 /**
  * Gets the data for `map`.
  *
@@ -911,7 +886,7 @@ function toSource(func) {
 
 /**
  * Creates an array of `array` values not included in the other given arrays
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * for equality comparisons. The order of result values is determined by the
  * order they occur in the first array.
  *
@@ -938,7 +913,7 @@ var difference = baseRest(function(array, values) {
 
 /**
  * Performs a
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * comparison between two values to determine if they are equivalent.
  *
  * @static
@@ -991,7 +966,7 @@ function eq(value, other) {
  * // => false
  */
 function isArguments(value) {
-  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
   return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
     (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
@@ -1047,7 +1022,7 @@ var isArray = Array.isArray;
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -1098,8 +1073,7 @@ function isArrayLikeObject(value) {
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -1107,16 +1081,15 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);
@@ -1138,7 +1111,7 @@ function isLength(value) {
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
diff --git a/lodash.difference/package.json b/lodash.difference/package.json
index 264763219..6fca19d1b 100644
--- a/lodash.difference/package.json
+++ b/lodash.difference/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.difference",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.difference` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.differenceby/README.md b/lodash.differenceby/README.md
index b86fb06c5..5d6ecd50e 100644
--- a/lodash.differenceby/README.md
+++ b/lodash.differenceby/README.md
@@ -1,4 +1,4 @@
-# lodash.differenceby v4.4.0
+# lodash.differenceby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.differenceBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var differenceBy = require('lodash.differenceby');
 ```
 
-See the [documentation](https://lodash.com/docs#differenceBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.differenceby) for more details.
+See the [documentation](https://lodash.com/docs#differenceBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.differenceby) for more details.
diff --git a/lodash.differenceby/index.js b/lodash.differenceby/index.js
index 7b18b1f4a..2bd393832 100644
--- a/lodash.differenceby/index.js
+++ b/lodash.differenceby/index.js
@@ -1,5 +1,5 @@
 /**
- * lodash 4.4.0 (Custom Build) <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
  * Copyright jQuery Foundation and other contributors <https://jquery.org/>
  * Released under MIT license <https://lodash.com/license>
@@ -33,7 +33,7 @@ var objectToString = objectProto.toString;
  *
  * @private
  * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new function.
+ * @returns {Function} Returns the new accessor function.
  */
 function baseProperty(key) {
   return function(object) {
diff --git a/lodash.differenceby/package.json b/lodash.differenceby/package.json
index 5e21b01c5..755435572 100644
--- a/lodash.differenceby/package.json
+++ b/lodash.differenceby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.differenceby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.differenceBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -15,7 +15,7 @@
   "repository": "lodash/lodash",
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
-    "lodash._basedifference": "~4.4.0",
+    "lodash._basedifference": "~4.5.0",
     "lodash._baseflatten": "~4.2.0",
     "lodash._baseiteratee": "~4.6.0",
     "lodash.rest": "^4.0.0"
diff --git a/lodash.differencewith/README.md b/lodash.differencewith/README.md
index 30effcce5..efd2ad5b5 100644
--- a/lodash.differencewith/README.md
+++ b/lodash.differencewith/README.md
@@ -1,4 +1,4 @@
-# lodash.differencewith v4.4.0
+# lodash.differencewith v4.5.0
 
 The [lodash](https://lodash.com/) method `_.differenceWith` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var differenceWith = require('lodash.differencewith');
 ```
 
-See the [documentation](https://lodash.com/docs#differenceWith) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.differencewith) for more details.
+See the [documentation](https://lodash.com/docs#differenceWith) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.differencewith) for more details.
diff --git a/lodash.differencewith/index.js b/lodash.differencewith/index.js
index 307644d3d..33c520791 100644
--- a/lodash.differencewith/index.js
+++ b/lodash.differencewith/index.js
@@ -23,7 +23,7 @@ var argsTag = '[object Arguments]',
 
 /**
  * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
@@ -64,7 +64,7 @@ function apply(func, thisArg, args) {
  * specifying an index to search from.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
  */
@@ -77,7 +77,7 @@ function arrayIncludes(array, value) {
  * This function is like `arrayIncludes` except that it accepts a comparator.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @param {Function} comparator The comparator invoked per element.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
@@ -138,7 +138,7 @@ function arrayPush(array, values) {
  * support for iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {Function} predicate The function invoked per iteration.
  * @param {number} fromIndex The index to search from.
  * @param {boolean} [fromRight] Specify iterating from right to left.
@@ -160,7 +160,7 @@ function baseFindIndex(array, predicate, fromIndex, fromRight) {
  * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} value The value to search for.
  * @param {number} fromIndex The index to search from.
  * @returns {number} Returns the index of the matched value, else `-1`.
@@ -191,19 +191,6 @@ function baseIsNaN(value) {
   return value !== value;
 }
 
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
 /**
  * The base implementation of `_.unary` without support for storing metadata.
  *
@@ -262,6 +249,7 @@ function isHostObject(value) {
 
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
+    funcProto = Function.prototype,
     objectProto = Object.prototype;
 
 /** Used to detect overreaching core-js shims. */
@@ -274,14 +262,14 @@ var maskSrcKey = (function() {
 }());
 
 /** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
+var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -663,7 +651,7 @@ SetCache.prototype.has = setCacheHas;
  * Gets the index at which the `key` is found in `array` of key-value pairs.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} key The key to search for.
  * @returns {number} Returns the index of the matched value, else `-1`.
  */
@@ -812,19 +800,6 @@ function baseRest(func, start) {
   };
 }
 
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
 /**
  * Gets the data for `map`.
  *
@@ -963,7 +938,7 @@ function last(array) {
 
 /**
  * Performs a
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * comparison between two values to determine if they are equivalent.
  *
  * @static
@@ -1016,7 +991,7 @@ function eq(value, other) {
  * // => false
  */
 function isArguments(value) {
-  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
   return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
     (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
@@ -1072,7 +1047,7 @@ var isArray = Array.isArray;
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -1123,8 +1098,7 @@ function isArrayLikeObject(value) {
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -1132,16 +1106,15 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);
@@ -1163,7 +1136,7 @@ function isLength(value) {
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
diff --git a/lodash.differencewith/package.json b/lodash.differencewith/package.json
index e2fcbaf2a..81c293dba 100644
--- a/lodash.differencewith/package.json
+++ b/lodash.differencewith/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.differencewith",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.differenceWith` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.droprightwhile/README.md b/lodash.droprightwhile/README.md
index 173f22b96..a4c5578d2 100644
--- a/lodash.droprightwhile/README.md
+++ b/lodash.droprightwhile/README.md
@@ -1,4 +1,4 @@
-# lodash.droprightwhile v4.4.0
+# lodash.droprightwhile v4.5.0
 
 The [lodash](https://lodash.com/) method `_.dropRightWhile` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var dropRightWhile = require('lodash.droprightwhile');
 ```
 
-See the [documentation](https://lodash.com/docs#dropRightWhile) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.droprightwhile) for more details.
+See the [documentation](https://lodash.com/docs#dropRightWhile) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.droprightwhile) for more details.
diff --git a/lodash.droprightwhile/index.js b/lodash.droprightwhile/index.js
index a0a9b82f2..504fe5dc0 100644
--- a/lodash.droprightwhile/index.js
+++ b/lodash.droprightwhile/index.js
@@ -6,8 +6,1151 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseIteratee = require('lodash._baseiteratee'),
-    baseSlice = require('lodash._baseslice');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+function baseSlice(array, start, end) {
+  var index = -1,
+      length = array.length;
+
+  if (start < 0) {
+    start = -start > length ? 0 : (length + start);
+  }
+  end = end > length ? length : end;
+  if (end < 0) {
+    end += length;
+  }
+  length = start > end ? 0 : ((end - start) >>> 0);
+  start >>>= 0;
+
+  var result = Array(length);
+  while (++index < length) {
+    result[index] = array[index + start];
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
 
 /**
  * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
@@ -32,6 +1175,558 @@ function baseWhile(array, predicate, isDrop, fromRight) {
     : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
 }
 
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Creates a slice of `array` excluding elements dropped from the end.
  * Elements are dropped until `predicate` returns falsey. The predicate is
@@ -42,8 +1737,7 @@ function baseWhile(array, predicate, isDrop, fromRight) {
  * @since 3.0.0
  * @category Array
  * @param {Array} array The array to query.
- * @param {Array|Function|Object|string} [predicate=_.identity]
- *  The function invoked per iteration.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
  * @returns {Array} Returns the slice of `array`.
  * @example
  *
@@ -74,4 +1768,571 @@ function dropRightWhile(array, predicate) {
     : [];
 }
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = dropRightWhile;
diff --git a/lodash.droprightwhile/package.json b/lodash.droprightwhile/package.json
index 6370dc729..3c84f2d0c 100644
--- a/lodash.droprightwhile/package.json
+++ b/lodash.droprightwhile/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.droprightwhile",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.dropRightWhile` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseiteratee": "~4.7.0",
-    "lodash._baseslice": "~4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.dropwhile/README.md b/lodash.dropwhile/README.md
index 81bb3743c..701827047 100644
--- a/lodash.dropwhile/README.md
+++ b/lodash.dropwhile/README.md
@@ -1,4 +1,4 @@
-# lodash.dropwhile v4.4.0
+# lodash.dropwhile v4.5.0
 
 The [lodash](https://lodash.com/) method `_.dropWhile` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var dropWhile = require('lodash.dropwhile');
 ```
 
-See the [documentation](https://lodash.com/docs#dropWhile) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.dropwhile) for more details.
+See the [documentation](https://lodash.com/docs#dropWhile) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.dropwhile) for more details.
diff --git a/lodash.dropwhile/index.js b/lodash.dropwhile/index.js
index 9fa18c5eb..9bfe20c06 100644
--- a/lodash.dropwhile/index.js
+++ b/lodash.dropwhile/index.js
@@ -6,8 +6,1151 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseIteratee = require('lodash._baseiteratee'),
-    baseSlice = require('lodash._baseslice');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+function baseSlice(array, start, end) {
+  var index = -1,
+      length = array.length;
+
+  if (start < 0) {
+    start = -start > length ? 0 : (length + start);
+  }
+  end = end > length ? length : end;
+  if (end < 0) {
+    end += length;
+  }
+  length = start > end ? 0 : ((end - start) >>> 0);
+  start >>>= 0;
+
+  var result = Array(length);
+  while (++index < length) {
+    result[index] = array[index + start];
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
 
 /**
  * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
@@ -32,6 +1175,558 @@ function baseWhile(array, predicate, isDrop, fromRight) {
     : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
 }
 
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Creates a slice of `array` excluding elements dropped from the beginning.
  * Elements are dropped until `predicate` returns falsey. The predicate is
@@ -42,7 +1737,7 @@ function baseWhile(array, predicate, isDrop, fromRight) {
  * @since 3.0.0
  * @category Array
  * @param {Array} array The array to query.
- * @param {Array|Function|Object|string} [predicate=_.identity]
+ * @param {Function} [predicate=_.identity]
  *  The function invoked per iteration.
  * @returns {Array} Returns the slice of `array`.
  * @example
@@ -74,4 +1769,571 @@ function dropWhile(array, predicate) {
     : [];
 }
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = dropWhile;
diff --git a/lodash.dropwhile/package.json b/lodash.dropwhile/package.json
index 13ec29922..f990d7f5e 100644
--- a/lodash.dropwhile/package.json
+++ b/lodash.dropwhile/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.dropwhile",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.dropWhile` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseiteratee": "~4.7.0",
-    "lodash._baseslice": "~4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.every/README.md b/lodash.every/README.md
index e87c543e4..4be52430e 100644
--- a/lodash.every/README.md
+++ b/lodash.every/README.md
@@ -1,4 +1,4 @@
-# lodash.every v4.4.0
+# lodash.every v4.5.0
 
 The [lodash](https://lodash.com/) method `_.every` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var every = require('lodash.every');
 ```
 
-See the [documentation](https://lodash.com/docs#every) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.every) for more details.
+See the [documentation](https://lodash.com/docs#every) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.every) for more details.
diff --git a/lodash.every/index.js b/lodash.every/index.js
index 4d3e3b297..2bedf4504 100644
--- a/lodash.every/index.js
+++ b/lodash.every/index.js
@@ -6,32 +6,134 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseEach = require('lodash._baseeach'),
-    baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
 
 /** Used as references for various `Number` constants. */
-var MAX_SAFE_INTEGER = 9007199254740991;
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
-var funcTag = '[object Function]',
-    genTag = '[object GeneratorFunction]';
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
 
 /** Used to detect unsigned integer values. */
 var reIsUint = /^(?:0|[1-9]\d*)$/;
 
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
 /**
  * A specialized version of `_.every` for arrays without support for
  * iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} predicate The function invoked per iteration.
  * @returns {boolean} Returns `true` if all elements pass the predicate check,
  *  else `false`.
  */
 function arrayEvery(array, predicate) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     if (!predicate(array[index], index, array)) {
@@ -41,8 +143,170 @@ function arrayEvery(array, predicate) {
   return true;
 }
 
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
@@ -51,6 +315,516 @@ var objectProto = Object.prototype;
  */
 var objectToString = objectProto.toString;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.forEach` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ */
+var baseEach = createBaseEach(baseForOwn);
+
 /**
  * The base implementation of `_.every` without support for iteratee shorthands.
  *
@@ -70,18 +844,657 @@ function baseEvery(collection, predicate) {
 }
 
 /**
- * The base implementation of `_.property` without support for deep paths.
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
  *
  * @private
- * @param {string} key The key of the property to get.
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
+
+/**
+ * The base implementation of `_.forOwn` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+function baseForOwn(object, iteratee) {
+  return object && baseFor(object, iteratee, keys);
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
  * @returns {Function} Returns the new accessor function.
  */
-function baseProperty(key) {
+function basePropertyDeep(path) {
   return function(object) {
-    return object == null ? undefined : object[key];
+    return baseGet(object, path);
   };
 }
 
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * Creates a `baseEach` or `baseEachRight` function.
+ *
+ * @private
+ * @param {Function} eachFunc The function to iterate over a collection.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseEach(eachFunc, fromRight) {
+  return function(collection, iteratee) {
+    if (collection == null) {
+      return collection;
+    }
+    if (!isArrayLike(collection)) {
+      return eachFunc(collection, iteratee);
+    }
+    var length = collection.length,
+        index = fromRight ? length : -1,
+        iterable = Object(collection);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (iteratee(iterable[index], index, iterable) === false) {
+        break;
+      }
+    }
+    return collection;
+  };
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
 /**
  * Gets the "length" property value of `object`.
  *
@@ -95,6 +1508,145 @@ function baseProperty(key) {
  */
 var getLength = baseProperty('length');
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
 /**
  * Checks if `value` is a valid array-like index.
  *
@@ -134,6 +1686,146 @@ function isIterateeCall(value, index, object) {
   return false;
 }
 
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Checks if `predicate` returns truthy for **all** elements of `collection`.
  * Iteration is stopped once `predicate` returns falsey. The predicate is
@@ -144,7 +1836,7 @@ function isIterateeCall(value, index, object) {
  * @since 0.1.0
  * @category Collection
  * @param {Array|Object} collection The collection to iterate over.
- * @param {Array|Function|Object|string} [predicate=_.identity]
+ * @param {Function} [predicate=_.identity]
  *  The function invoked per iteration.
  * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  * @returns {boolean} Returns `true` if all elements pass the predicate check,
@@ -179,6 +1871,73 @@ function every(collection, predicate, guard) {
   return func(collection, baseIteratee(predicate, 3));
 }
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
 /**
  * Performs a
  * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
@@ -193,8 +1952,8 @@ function every(collection, predicate, guard) {
  * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  * @example
  *
- * var object = { 'user': 'fred' };
- * var other = { 'user': 'fred' };
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
  *
  * _.eq(object, object);
  * // => true
@@ -215,17 +1974,39 @@ function eq(value, other) {
   return value === other || (value !== value && other !== other);
 }
 
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -271,6 +2052,35 @@ function isArrayLike(value) {
   return value != null && isLength(getLength(value)) && !isFunction(value);
 }
 
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
 /**
  * Checks if `value` is classified as a `Function` object.
  *
@@ -279,8 +2089,7 @@ function isArrayLike(value) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -359,4 +2168,274 @@ function isObject(value) {
   return !!value && (type == 'object' || type == 'function');
 }
 
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = every;
diff --git a/lodash.every/package.json b/lodash.every/package.json
index e71a6e826..670618c0f 100644
--- a/lodash.every/package.json
+++ b/lodash.every/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.every",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.every` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseeach": "~4.1.0",
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.filter/README.md b/lodash.filter/README.md
index 1b3a3ae75..0ba7d836b 100644
--- a/lodash.filter/README.md
+++ b/lodash.filter/README.md
@@ -1,4 +1,4 @@
-# lodash.filter v4.4.0
+# lodash.filter v4.5.0
 
 The [lodash](https://lodash.com/) method `_.filter` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var filter = require('lodash.filter');
 ```
 
-See the [documentation](https://lodash.com/docs#filter) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.filter) for more details.
+See the [documentation](https://lodash.com/docs#filter) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.filter) for more details.
diff --git a/lodash.filter/index.js b/lodash.filter/index.js
index efd87c536..59fa7f8ac 100644
--- a/lodash.filter/index.js
+++ b/lodash.filter/index.js
@@ -6,21 +6,133 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseFilter = require('lodash._basefilter'),
-    baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
 
 /**
  * A specialized version of `_.filter` for arrays without support for
  * iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} predicate The function invoked per iteration.
  * @returns {Array} Returns the new filtered array.
  */
 function arrayFilter(array, predicate) {
   var index = -1,
-      length = array.length,
+      length = array ? array.length : 0,
       resIndex = 0,
       result = [];
 
@@ -33,17 +145,1678 @@ function arrayFilter(array, predicate) {
   return result;
 }
 
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.forEach` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ */
+var baseEach = createBaseEach(baseForOwn);
+
+/**
+ * The base implementation of `_.filter` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {Array} Returns the new filtered array.
+ */
+function baseFilter(collection, predicate) {
+  var result = [];
+  baseEach(collection, function(value, index, collection) {
+    if (predicate(value, index, collection)) {
+      result.push(value);
+    }
+  });
+  return result;
+}
+
+/**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
+
+/**
+ * The base implementation of `_.forOwn` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+function baseForOwn(object, iteratee) {
+  return object && baseFor(object, iteratee, keys);
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * Creates a `baseEach` or `baseEachRight` function.
+ *
+ * @private
+ * @param {Function} eachFunc The function to iterate over a collection.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseEach(eachFunc, fromRight) {
+  return function(collection, iteratee) {
+    if (collection == null) {
+      return collection;
+    }
+    if (!isArrayLike(collection)) {
+      return eachFunc(collection, iteratee);
+    }
+    var length = collection.length,
+        index = fromRight ? length : -1,
+        iterable = Object(collection);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (iteratee(iterable[index], index, iterable) === false) {
+        break;
+      }
+    }
+    return collection;
+  };
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Iterates over elements of `collection`, returning an array of all elements
  * `predicate` returns truthy for. The predicate is invoked with three
  * arguments: (value, index|key, collection).
  *
+ * **Note:** Unlike `_.remove`, this method returns a new array.
+ *
  * @static
  * @memberOf _
  * @since 0.1.0
  * @category Collection
  * @param {Array|Object} collection The collection to iterate over.
- * @param {Array|Function|Object|string} [predicate=_.identity]
+ * @param {Function} [predicate=_.identity]
  *  The function invoked per iteration.
  * @returns {Array} Returns the new filtered array.
  * @see _.reject
@@ -74,17 +1847,142 @@ function filter(collection, predicate) {
   return func(collection, baseIteratee(predicate, 3));
 }
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -101,4 +1999,419 @@ function filter(collection, predicate) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = filter;
diff --git a/lodash.filter/package.json b/lodash.filter/package.json
index 026244ee7..fc646ae52 100644
--- a/lodash.filter/package.json
+++ b/lodash.filter/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.filter",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.filter` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._basefilter": "~4.0.0",
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.find/README.md b/lodash.find/README.md
index 832ece0ed..d7f927309 100644
--- a/lodash.find/README.md
+++ b/lodash.find/README.md
@@ -1,4 +1,4 @@
-# lodash.find v4.4.0
+# lodash.find v4.5.0
 
 The [lodash](https://lodash.com/) method `_.find` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var find = require('lodash.find');
 ```
 
-See the [documentation](https://lodash.com/docs#find) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.find) for more details.
+See the [documentation](https://lodash.com/docs#find) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.find) for more details.
diff --git a/lodash.find/index.js b/lodash.find/index.js
index 3170e8b13..c75edf4ea 100644
--- a/lodash.find/index.js
+++ b/lodash.find/index.js
@@ -6,10 +6,1782 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseEach = require('lodash._baseeach'),
-    baseFind = require('lodash._basefind'),
-    baseFindIndex = require('lodash._basefindindex'),
-    baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991,
+    MAX_INTEGER = 1.7976931348623157e+308,
+    NAN = 0 / 0;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match leading and trailing whitespace. */
+var reTrim = /^\s+|\s+$/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect bad signed hexadecimal string values. */
+var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+
+/** Used to detect binary string values. */
+var reIsBinary = /^0b[01]+$/i;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect octal string values. */
+var reIsOctal = /^0o[0-7]+$/i;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Built-in method references without a dependency on `root`. */
+var freeParseInt = parseInt;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.findIndex` and `_.findLastIndex` without
+ * support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {Function} predicate The function invoked per iteration.
+ * @param {number} fromIndex The index to search from.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function baseFindIndex(array, predicate, fromIndex, fromRight) {
+  var length = array.length,
+      index = fromIndex + (fromRight ? 1 : -1);
+
+  while ((fromRight ? index-- : ++index < length)) {
+    if (predicate(array[index], index, array)) {
+      return index;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys,
+    nativeMax = Math.max;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * Creates a `_.find` or `_.findLast` function.
+ *
+ * @private
+ * @param {Function} findIndexFunc The function to find the collection index.
+ * @returns {Function} Returns the new find function.
+ */
+function createFind(findIndexFunc) {
+  return function(collection, predicate, fromIndex) {
+    var iterable = Object(collection);
+    if (!isArrayLike(collection)) {
+      var iteratee = baseIteratee(predicate, 3);
+      collection = keys(collection);
+      predicate = function(key) { return iteratee(iterable[key], key, iterable); };
+    }
+    var index = findIndexFunc(collection, predicate, fromIndex);
+    return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * This method is like `_.find` except that it returns the index of the first
+ * element `predicate` returns truthy for instead of the element itself.
+ *
+ * @static
+ * @memberOf _
+ * @since 1.1.0
+ * @category Array
+ * @param {Array} array The array to search.
+ * @param {Function} [predicate=_.identity]
+ *  The function invoked per iteration.
+ * @param {number} [fromIndex=0] The index to search from.
+ * @returns {number} Returns the index of the found element, else `-1`.
+ * @example
+ *
+ * var users = [
+ *   { 'user': 'barney',  'active': false },
+ *   { 'user': 'fred',    'active': false },
+ *   { 'user': 'pebbles', 'active': true }
+ * ];
+ *
+ * _.findIndex(users, function(o) { return o.user == 'barney'; });
+ * // => 0
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.findIndex(users, { 'user': 'fred', 'active': false });
+ * // => 1
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.findIndex(users, ['active', false]);
+ * // => 0
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.findIndex(users, 'active');
+ * // => 2
+ */
+function findIndex(array, predicate, fromIndex) {
+  var length = array ? array.length : 0;
+  if (!length) {
+    return -1;
+  }
+  var index = fromIndex == null ? 0 : toInteger(fromIndex);
+  if (index < 0) {
+    index = nativeMax(length + index, 0);
+  }
+  return baseFindIndex(array, baseIteratee(predicate, 3), index);
+}
 
 /**
  * Iterates over elements of `collection`, returning the first element
@@ -21,8 +1793,9 @@ var baseEach = require('lodash._baseeach'),
  * @since 0.1.0
  * @category Collection
  * @param {Array|Object} collection The collection to search.
- * @param {Array|Function|Object|string} [predicate=_.identity]
+ * @param {Function} [predicate=_.identity]
  *  The function invoked per iteration.
+ * @param {number} [fromIndex=0] The index to search from.
  * @returns {*} Returns the matched element, else `undefined`.
  * @example
  *
@@ -47,13 +1820,133 @@ var baseEach = require('lodash._baseeach'),
  * _.find(users, 'active');
  * // => object for 'barney'
  */
-function find(collection, predicate) {
-  predicate = baseIteratee(predicate, 3);
-  if (isArray(collection)) {
-    var index = baseFindIndex(collection, predicate);
-    return index > -1 ? collection[index] : undefined;
+var find = createFind(findIndex);
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
   }
-  return baseFind(collection, predicate, baseEach);
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
 
 /**
@@ -62,11 +1955,9 @@ function find(collection, predicate) {
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -83,4 +1974,531 @@ function find(collection, predicate) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a finite number.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.12.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {number} Returns the converted number.
+ * @example
+ *
+ * _.toFinite(3.2);
+ * // => 3.2
+ *
+ * _.toFinite(Number.MIN_VALUE);
+ * // => 5e-324
+ *
+ * _.toFinite(Infinity);
+ * // => 1.7976931348623157e+308
+ *
+ * _.toFinite('3.2');
+ * // => 3.2
+ */
+function toFinite(value) {
+  if (!value) {
+    return value === 0 ? value : 0;
+  }
+  value = toNumber(value);
+  if (value === INFINITY || value === -INFINITY) {
+    var sign = (value < 0 ? -1 : 1);
+    return sign * MAX_INTEGER;
+  }
+  return value === value ? value : 0;
+}
+
+/**
+ * Converts `value` to an integer.
+ *
+ * **Note:** This method is loosely based on
+ * [`ToInteger`](http://www.ecma-international.org/ecma-262/6.0/#sec-tointeger).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {number} Returns the converted integer.
+ * @example
+ *
+ * _.toInteger(3.2);
+ * // => 3
+ *
+ * _.toInteger(Number.MIN_VALUE);
+ * // => 0
+ *
+ * _.toInteger(Infinity);
+ * // => 1.7976931348623157e+308
+ *
+ * _.toInteger('3.2');
+ * // => 3
+ */
+function toInteger(value) {
+  var result = toFinite(value),
+      remainder = result % 1;
+
+  return result === result ? (remainder ? result - remainder : result) : 0;
+}
+
+/**
+ * Converts `value` to a number.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {number} Returns the number.
+ * @example
+ *
+ * _.toNumber(3.2);
+ * // => 3.2
+ *
+ * _.toNumber(Number.MIN_VALUE);
+ * // => 5e-324
+ *
+ * _.toNumber(Infinity);
+ * // => Infinity
+ *
+ * _.toNumber('3.2');
+ * // => 3.2
+ */
+function toNumber(value) {
+  if (typeof value == 'number') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return NAN;
+  }
+  if (isObject(value)) {
+    var other = isFunction(value.valueOf) ? value.valueOf() : value;
+    value = isObject(other) ? (other + '') : other;
+  }
+  if (typeof value != 'string') {
+    return value === 0 ? value : +value;
+  }
+  value = value.replace(reTrim, '');
+  var isBinary = reIsBinary.test(value);
+  return (isBinary || reIsOctal.test(value))
+    ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
+    : (reIsBadHex.test(value) ? NAN : +value);
+}
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = find;
diff --git a/lodash.find/package.json b/lodash.find/package.json
index c70e38a15..27df3a949 100644
--- a/lodash.find/package.json
+++ b/lodash.find/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.find",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.find` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,11 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseeach": "~4.1.0",
-    "lodash._basefind": "~3.0.0",
-    "lodash._basefindindex": "~3.6.0",
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.findindex/README.md b/lodash.findindex/README.md
index 8e5558ed8..0b741df11 100644
--- a/lodash.findindex/README.md
+++ b/lodash.findindex/README.md
@@ -1,4 +1,4 @@
-# lodash.findindex v4.4.0
+# lodash.findindex v4.5.0
 
 The [lodash](https://lodash.com/) method `_.findIndex` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var findIndex = require('lodash.findindex');
 ```
 
-See the [documentation](https://lodash.com/docs#findIndex) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.findindex) for more details.
+See the [documentation](https://lodash.com/docs#findIndex) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.findindex) for more details.
diff --git a/lodash.findindex/index.js b/lodash.findindex/index.js
index bfd1cd0aa..1a4130f13 100644
--- a/lodash.findindex/index.js
+++ b/lodash.findindex/index.js
@@ -6,8 +6,1714 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseFindIndex = require('lodash._basefindindex'),
-    baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991,
+    MAX_INTEGER = 1.7976931348623157e+308,
+    NAN = 0 / 0;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match leading and trailing whitespace. */
+var reTrim = /^\s+|\s+$/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect bad signed hexadecimal string values. */
+var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+
+/** Used to detect binary string values. */
+var reIsBinary = /^0b[01]+$/i;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect octal string values. */
+var reIsOctal = /^0o[0-7]+$/i;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Built-in method references without a dependency on `root`. */
+var freeParseInt = parseInt;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.findIndex` and `_.findLastIndex` without
+ * support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {Function} predicate The function invoked per iteration.
+ * @param {number} fromIndex The index to search from.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function baseFindIndex(array, predicate, fromIndex, fromRight) {
+  var length = array.length,
+      index = fromIndex + (fromRight ? 1 : -1);
+
+  while ((fromRight ? index-- : ++index < length)) {
+    if (predicate(array[index], index, array)) {
+      return index;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys,
+    nativeMax = Math.max;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
 
 /**
  * This method is like `_.find` except that it returns the index of the first
@@ -18,8 +1724,9 @@ var baseFindIndex = require('lodash._basefindindex'),
  * @since 1.1.0
  * @category Array
  * @param {Array} array The array to search.
- * @param {Array|Function|Object|string} [predicate=_.identity]
+ * @param {Function} [predicate=_.identity]
  *  The function invoked per iteration.
+ * @param {number} [fromIndex=0] The index to search from.
  * @returns {number} Returns the index of the found element, else `-1`.
  * @example
  *
@@ -44,10 +1751,695 @@ var baseFindIndex = require('lodash._basefindindex'),
  * _.findIndex(users, 'active');
  * // => 2
  */
-function findIndex(array, predicate) {
-  return (array && array.length)
-    ? baseFindIndex(array, baseIteratee(predicate, 3))
-    : -1;
+function findIndex(array, predicate, fromIndex) {
+  var length = array ? array.length : 0;
+  if (!length) {
+    return -1;
+  }
+  var index = fromIndex == null ? 0 : toInteger(fromIndex);
+  if (index < 0) {
+    index = nativeMax(length + index, 0);
+  }
+  return baseFindIndex(array, baseIteratee(predicate, 3), index);
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a finite number.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.12.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {number} Returns the converted number.
+ * @example
+ *
+ * _.toFinite(3.2);
+ * // => 3.2
+ *
+ * _.toFinite(Number.MIN_VALUE);
+ * // => 5e-324
+ *
+ * _.toFinite(Infinity);
+ * // => 1.7976931348623157e+308
+ *
+ * _.toFinite('3.2');
+ * // => 3.2
+ */
+function toFinite(value) {
+  if (!value) {
+    return value === 0 ? value : 0;
+  }
+  value = toNumber(value);
+  if (value === INFINITY || value === -INFINITY) {
+    var sign = (value < 0 ? -1 : 1);
+    return sign * MAX_INTEGER;
+  }
+  return value === value ? value : 0;
+}
+
+/**
+ * Converts `value` to an integer.
+ *
+ * **Note:** This method is loosely based on
+ * [`ToInteger`](http://www.ecma-international.org/ecma-262/6.0/#sec-tointeger).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {number} Returns the converted integer.
+ * @example
+ *
+ * _.toInteger(3.2);
+ * // => 3
+ *
+ * _.toInteger(Number.MIN_VALUE);
+ * // => 0
+ *
+ * _.toInteger(Infinity);
+ * // => 1.7976931348623157e+308
+ *
+ * _.toInteger('3.2');
+ * // => 3
+ */
+function toInteger(value) {
+  var result = toFinite(value),
+      remainder = result % 1;
+
+  return result === result ? (remainder ? result - remainder : result) : 0;
+}
+
+/**
+ * Converts `value` to a number.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {number} Returns the number.
+ * @example
+ *
+ * _.toNumber(3.2);
+ * // => 3.2
+ *
+ * _.toNumber(Number.MIN_VALUE);
+ * // => 5e-324
+ *
+ * _.toNumber(Infinity);
+ * // => Infinity
+ *
+ * _.toNumber('3.2');
+ * // => 3.2
+ */
+function toNumber(value) {
+  if (typeof value == 'number') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return NAN;
+  }
+  if (isObject(value)) {
+    var other = isFunction(value.valueOf) ? value.valueOf() : value;
+    value = isObject(other) ? (other + '') : other;
+  }
+  if (typeof value != 'string') {
+    return value === 0 ? value : +value;
+  }
+  value = value.replace(reTrim, '');
+  var isBinary = reIsBinary.test(value);
+  return (isBinary || reIsOctal.test(value))
+    ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
+    : (reIsBadHex.test(value) ? NAN : +value);
+}
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
 }
 
 module.exports = findIndex;
diff --git a/lodash.findindex/package.json b/lodash.findindex/package.json
index 589ceb89d..1f5649da5 100644
--- a/lodash.findindex/package.json
+++ b/lodash.findindex/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.findindex",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.findIndex` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._basefindindex": "~3.6.0",
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.findkey/README.md b/lodash.findkey/README.md
index 9a5df973c..4b64a7596 100644
--- a/lodash.findkey/README.md
+++ b/lodash.findkey/README.md
@@ -1,4 +1,4 @@
-# lodash.findkey v4.4.0
+# lodash.findkey v4.5.0
 
 The [lodash](https://lodash.com/) method `_.findKey` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var findKey = require('lodash.findkey');
 ```
 
-See the [documentation](https://lodash.com/docs#findKey) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.findkey) for more details.
+See the [documentation](https://lodash.com/docs#findKey) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.findkey) for more details.
diff --git a/lodash.findkey/index.js b/lodash.findkey/index.js
index bc0a77704..2280279ea 100644
--- a/lodash.findkey/index.js
+++ b/lodash.findkey/index.js
@@ -6,10 +6,827 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseFind = require('lodash._basefind'),
-    baseFor = require('lodash._basefor'),
-    baseIteratee = require('lodash._baseiteratee'),
-    keys = require('lodash.keys');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of methods like `_.findKey` and `_.findLastKey`,
+ * without support for iteratee shorthands, which iterates over `collection`
+ * using `eachFunc`.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to search.
+ * @param {Function} predicate The function invoked per iteration.
+ * @param {Function} eachFunc The function to iterate over `collection`.
+ * @returns {*} Returns the found element or its key, else `undefined`.
+ */
+function baseFindKey(collection, predicate, eachFunc) {
+  var result;
+  eachFunc(collection, function(value, key, collection) {
+    if (predicate(value, key, collection)) {
+      result = key;
+      return false;
+    }
+  });
+  return result;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
 
 /**
  * The base implementation of `_.forOwn` without support for iteratee shorthands.
@@ -23,6 +840,1324 @@ function baseForOwn(object, iteratee) {
   return object && baseFor(object, iteratee, keys);
 }
 
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
 /**
  * This method is like `_.find` except that it returns the key of the first
  * element `predicate` returns truthy for instead of the element itself.
@@ -32,8 +2167,7 @@ function baseForOwn(object, iteratee) {
  * @since 1.1.0
  * @category Object
  * @param {Object} object The object to search.
- * @param {Array|Function|Object|string} [predicate=_.identity]
- *  The function invoked per iteration.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
  * @returns {string|undefined} Returns the key of the matched element,
  *  else `undefined`.
  * @example
@@ -60,7 +2194,161 @@ function baseForOwn(object, iteratee) {
  * // => 'barney'
  */
 function findKey(object, predicate) {
-  return baseFind(object, baseIteratee(predicate, 3), baseForOwn, true);
+  return baseFindKey(object, baseIteratee(predicate, 3), baseForOwn);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
 }
 
 module.exports = findKey;
diff --git a/lodash.findkey/package.json b/lodash.findkey/package.json
index 13ac047eb..7be676aa7 100644
--- a/lodash.findkey/package.json
+++ b/lodash.findkey/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.findkey",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.findKey` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,11 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._basefind": "~3.0.0",
-    "lodash._basefor": "~3.0.0",
-    "lodash._baseiteratee": "~4.7.0",
-    "lodash.keys": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.findlast/README.md b/lodash.findlast/README.md
index eaced1c28..929b02c44 100644
--- a/lodash.findlast/README.md
+++ b/lodash.findlast/README.md
@@ -1,4 +1,4 @@
-# lodash.findlast v4.4.0
+# lodash.findlast v4.5.0
 
 The [lodash](https://lodash.com/) method `_.findLast` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var findLast = require('lodash.findlast');
 ```
 
-See the [documentation](https://lodash.com/docs#findLast) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.findlast) for more details.
+See the [documentation](https://lodash.com/docs#findLast) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.findlast) for more details.
diff --git a/lodash.findlast/index.js b/lodash.findlast/index.js
index febdf6b78..148b2af32 100644
--- a/lodash.findlast/index.js
+++ b/lodash.findlast/index.js
@@ -6,10 +6,1786 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseEachRight = require('lodash._baseeachright'),
-    baseFind = require('lodash._basefind'),
-    baseFindIndex = require('lodash._basefindindex'),
-    baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991,
+    MAX_INTEGER = 1.7976931348623157e+308,
+    NAN = 0 / 0;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match leading and trailing whitespace. */
+var reTrim = /^\s+|\s+$/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect bad signed hexadecimal string values. */
+var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+
+/** Used to detect binary string values. */
+var reIsBinary = /^0b[01]+$/i;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect octal string values. */
+var reIsOctal = /^0o[0-7]+$/i;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Built-in method references without a dependency on `root`. */
+var freeParseInt = parseInt;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.findIndex` and `_.findLastIndex` without
+ * support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {Function} predicate The function invoked per iteration.
+ * @param {number} fromIndex The index to search from.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function baseFindIndex(array, predicate, fromIndex, fromRight) {
+  var length = array.length,
+      index = fromIndex + (fromRight ? 1 : -1);
+
+  while ((fromRight ? index-- : ++index < length)) {
+    if (predicate(array[index], index, array)) {
+      return index;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys,
+    nativeMax = Math.max,
+    nativeMin = Math.min;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * Creates a `_.find` or `_.findLast` function.
+ *
+ * @private
+ * @param {Function} findIndexFunc The function to find the collection index.
+ * @returns {Function} Returns the new find function.
+ */
+function createFind(findIndexFunc) {
+  return function(collection, predicate, fromIndex) {
+    var iterable = Object(collection);
+    if (!isArrayLike(collection)) {
+      var iteratee = baseIteratee(predicate, 3);
+      collection = keys(collection);
+      predicate = function(key) { return iteratee(iterable[key], key, iterable); };
+    }
+    var index = findIndexFunc(collection, predicate, fromIndex);
+    return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * This method is like `_.findIndex` except that it iterates over elements
+ * of `collection` from right to left.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.0.0
+ * @category Array
+ * @param {Array} array The array to search.
+ * @param {Function} [predicate=_.identity]
+ *  The function invoked per iteration.
+ * @param {number} [fromIndex=array.length-1] The index to search from.
+ * @returns {number} Returns the index of the found element, else `-1`.
+ * @example
+ *
+ * var users = [
+ *   { 'user': 'barney',  'active': true },
+ *   { 'user': 'fred',    'active': false },
+ *   { 'user': 'pebbles', 'active': false }
+ * ];
+ *
+ * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
+ * // => 2
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.findLastIndex(users, { 'user': 'barney', 'active': true });
+ * // => 0
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.findLastIndex(users, ['active', false]);
+ * // => 2
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.findLastIndex(users, 'active');
+ * // => 0
+ */
+function findLastIndex(array, predicate, fromIndex) {
+  var length = array ? array.length : 0;
+  if (!length) {
+    return -1;
+  }
+  var index = length - 1;
+  if (fromIndex !== undefined) {
+    index = toInteger(fromIndex);
+    index = fromIndex < 0
+      ? nativeMax(length + index, 0)
+      : nativeMin(index, length - 1);
+  }
+  return baseFindIndex(array, baseIteratee(predicate, 3), index, true);
+}
 
 /**
  * This method is like `_.find` except that it iterates over elements of
@@ -20,8 +1796,9 @@ var baseEachRight = require('lodash._baseeachright'),
  * @since 2.0.0
  * @category Collection
  * @param {Array|Object} collection The collection to search.
- * @param {Array|Function|Object|string} [predicate=_.identity]
+ * @param {Function} [predicate=_.identity]
  *  The function invoked per iteration.
+ * @param {number} [fromIndex=collection.length-1] The index to search from.
  * @returns {*} Returns the matched element, else `undefined`.
  * @example
  *
@@ -30,13 +1807,133 @@ var baseEachRight = require('lodash._baseeachright'),
  * });
  * // => 3
  */
-function findLast(collection, predicate) {
-  predicate = baseIteratee(predicate, 3);
-  if (isArray(collection)) {
-    var index = baseFindIndex(collection, predicate, true);
-    return index > -1 ? collection[index] : undefined;
+var findLast = createFind(findLastIndex);
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
   }
-  return baseFind(collection, predicate, baseEachRight);
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
 
 /**
@@ -45,11 +1942,9 @@ function findLast(collection, predicate) {
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -66,4 +1961,531 @@ function findLast(collection, predicate) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a finite number.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.12.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {number} Returns the converted number.
+ * @example
+ *
+ * _.toFinite(3.2);
+ * // => 3.2
+ *
+ * _.toFinite(Number.MIN_VALUE);
+ * // => 5e-324
+ *
+ * _.toFinite(Infinity);
+ * // => 1.7976931348623157e+308
+ *
+ * _.toFinite('3.2');
+ * // => 3.2
+ */
+function toFinite(value) {
+  if (!value) {
+    return value === 0 ? value : 0;
+  }
+  value = toNumber(value);
+  if (value === INFINITY || value === -INFINITY) {
+    var sign = (value < 0 ? -1 : 1);
+    return sign * MAX_INTEGER;
+  }
+  return value === value ? value : 0;
+}
+
+/**
+ * Converts `value` to an integer.
+ *
+ * **Note:** This method is loosely based on
+ * [`ToInteger`](http://www.ecma-international.org/ecma-262/6.0/#sec-tointeger).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {number} Returns the converted integer.
+ * @example
+ *
+ * _.toInteger(3.2);
+ * // => 3
+ *
+ * _.toInteger(Number.MIN_VALUE);
+ * // => 0
+ *
+ * _.toInteger(Infinity);
+ * // => 1.7976931348623157e+308
+ *
+ * _.toInteger('3.2');
+ * // => 3
+ */
+function toInteger(value) {
+  var result = toFinite(value),
+      remainder = result % 1;
+
+  return result === result ? (remainder ? result - remainder : result) : 0;
+}
+
+/**
+ * Converts `value` to a number.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {number} Returns the number.
+ * @example
+ *
+ * _.toNumber(3.2);
+ * // => 3.2
+ *
+ * _.toNumber(Number.MIN_VALUE);
+ * // => 5e-324
+ *
+ * _.toNumber(Infinity);
+ * // => Infinity
+ *
+ * _.toNumber('3.2');
+ * // => 3.2
+ */
+function toNumber(value) {
+  if (typeof value == 'number') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return NAN;
+  }
+  if (isObject(value)) {
+    var other = isFunction(value.valueOf) ? value.valueOf() : value;
+    value = isObject(other) ? (other + '') : other;
+  }
+  if (typeof value != 'string') {
+    return value === 0 ? value : +value;
+  }
+  value = value.replace(reTrim, '');
+  var isBinary = reIsBinary.test(value);
+  return (isBinary || reIsOctal.test(value))
+    ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
+    : (reIsBadHex.test(value) ? NAN : +value);
+}
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = findLast;
diff --git a/lodash.findlast/package.json b/lodash.findlast/package.json
index fbe268c7c..1ec1f4686 100644
--- a/lodash.findlast/package.json
+++ b/lodash.findlast/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.findlast",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.findLast` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,11 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseeachright": "~4.1.0",
-    "lodash._basefind": "~3.0.0",
-    "lodash._basefindindex": "~3.6.0",
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.findlastindex/README.md b/lodash.findlastindex/README.md
index e44bcf2a5..35516226c 100644
--- a/lodash.findlastindex/README.md
+++ b/lodash.findlastindex/README.md
@@ -1,4 +1,4 @@
-# lodash.findlastindex v4.4.0
+# lodash.findlastindex v4.5.0
 
 The [lodash](https://lodash.com/) method `_.findLastIndex` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var findLastIndex = require('lodash.findlastindex');
 ```
 
-See the [documentation](https://lodash.com/docs#findLastIndex) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.findlastindex) for more details.
+See the [documentation](https://lodash.com/docs#findLastIndex) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.findlastindex) for more details.
diff --git a/lodash.findlastindex/index.js b/lodash.findlastindex/index.js
index 6bb10e963..946b8ec44 100644
--- a/lodash.findlastindex/index.js
+++ b/lodash.findlastindex/index.js
@@ -6,8 +6,1715 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseFindIndex = require('lodash._basefindindex'),
-    baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991,
+    MAX_INTEGER = 1.7976931348623157e+308,
+    NAN = 0 / 0;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match leading and trailing whitespace. */
+var reTrim = /^\s+|\s+$/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect bad signed hexadecimal string values. */
+var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+
+/** Used to detect binary string values. */
+var reIsBinary = /^0b[01]+$/i;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect octal string values. */
+var reIsOctal = /^0o[0-7]+$/i;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Built-in method references without a dependency on `root`. */
+var freeParseInt = parseInt;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.findIndex` and `_.findLastIndex` without
+ * support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {Function} predicate The function invoked per iteration.
+ * @param {number} fromIndex The index to search from.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function baseFindIndex(array, predicate, fromIndex, fromRight) {
+  var length = array.length,
+      index = fromIndex + (fromRight ? 1 : -1);
+
+  while ((fromRight ? index-- : ++index < length)) {
+    if (predicate(array[index], index, array)) {
+      return index;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys,
+    nativeMax = Math.max,
+    nativeMin = Math.min;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
 
 /**
  * This method is like `_.findIndex` except that it iterates over elements
@@ -18,8 +1725,9 @@ var baseFindIndex = require('lodash._basefindindex'),
  * @since 2.0.0
  * @category Array
  * @param {Array} array The array to search.
- * @param {Array|Function|Object|string} [predicate=_.identity]
+ * @param {Function} [predicate=_.identity]
  *  The function invoked per iteration.
+ * @param {number} [fromIndex=array.length-1] The index to search from.
  * @returns {number} Returns the index of the found element, else `-1`.
  * @example
  *
@@ -44,10 +1752,698 @@ var baseFindIndex = require('lodash._basefindindex'),
  * _.findLastIndex(users, 'active');
  * // => 0
  */
-function findLastIndex(array, predicate) {
-  return (array && array.length)
-    ? baseFindIndex(array, baseIteratee(predicate, 3), true)
-    : -1;
+function findLastIndex(array, predicate, fromIndex) {
+  var length = array ? array.length : 0;
+  if (!length) {
+    return -1;
+  }
+  var index = length - 1;
+  if (fromIndex !== undefined) {
+    index = toInteger(fromIndex);
+    index = fromIndex < 0
+      ? nativeMax(length + index, 0)
+      : nativeMin(index, length - 1);
+  }
+  return baseFindIndex(array, baseIteratee(predicate, 3), index, true);
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a finite number.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.12.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {number} Returns the converted number.
+ * @example
+ *
+ * _.toFinite(3.2);
+ * // => 3.2
+ *
+ * _.toFinite(Number.MIN_VALUE);
+ * // => 5e-324
+ *
+ * _.toFinite(Infinity);
+ * // => 1.7976931348623157e+308
+ *
+ * _.toFinite('3.2');
+ * // => 3.2
+ */
+function toFinite(value) {
+  if (!value) {
+    return value === 0 ? value : 0;
+  }
+  value = toNumber(value);
+  if (value === INFINITY || value === -INFINITY) {
+    var sign = (value < 0 ? -1 : 1);
+    return sign * MAX_INTEGER;
+  }
+  return value === value ? value : 0;
+}
+
+/**
+ * Converts `value` to an integer.
+ *
+ * **Note:** This method is loosely based on
+ * [`ToInteger`](http://www.ecma-international.org/ecma-262/6.0/#sec-tointeger).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {number} Returns the converted integer.
+ * @example
+ *
+ * _.toInteger(3.2);
+ * // => 3
+ *
+ * _.toInteger(Number.MIN_VALUE);
+ * // => 0
+ *
+ * _.toInteger(Infinity);
+ * // => 1.7976931348623157e+308
+ *
+ * _.toInteger('3.2');
+ * // => 3
+ */
+function toInteger(value) {
+  var result = toFinite(value),
+      remainder = result % 1;
+
+  return result === result ? (remainder ? result - remainder : result) : 0;
+}
+
+/**
+ * Converts `value` to a number.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {number} Returns the number.
+ * @example
+ *
+ * _.toNumber(3.2);
+ * // => 3.2
+ *
+ * _.toNumber(Number.MIN_VALUE);
+ * // => 5e-324
+ *
+ * _.toNumber(Infinity);
+ * // => Infinity
+ *
+ * _.toNumber('3.2');
+ * // => 3.2
+ */
+function toNumber(value) {
+  if (typeof value == 'number') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return NAN;
+  }
+  if (isObject(value)) {
+    var other = isFunction(value.valueOf) ? value.valueOf() : value;
+    value = isObject(other) ? (other + '') : other;
+  }
+  if (typeof value != 'string') {
+    return value === 0 ? value : +value;
+  }
+  value = value.replace(reTrim, '');
+  var isBinary = reIsBinary.test(value);
+  return (isBinary || reIsOctal.test(value))
+    ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
+    : (reIsBadHex.test(value) ? NAN : +value);
+}
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
 }
 
 module.exports = findLastIndex;
diff --git a/lodash.findlastindex/package.json b/lodash.findlastindex/package.json
index 275bd4979..de1c45eb1 100644
--- a/lodash.findlastindex/package.json
+++ b/lodash.findlastindex/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.findlastindex",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.findLastIndex` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._basefindindex": "~3.6.0",
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.findlastkey/README.md b/lodash.findlastkey/README.md
index 8d758e310..9807d0ab8 100644
--- a/lodash.findlastkey/README.md
+++ b/lodash.findlastkey/README.md
@@ -1,4 +1,4 @@
-# lodash.findlastkey v4.4.0
+# lodash.findlastkey v4.5.0
 
 The [lodash](https://lodash.com/) method `_.findLastKey` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var findLastKey = require('lodash.findlastkey');
 ```
 
-See the [documentation](https://lodash.com/docs#findLastKey) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.findlastkey) for more details.
+See the [documentation](https://lodash.com/docs#findLastKey) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.findlastkey) for more details.
diff --git a/lodash.findlastkey/index.js b/lodash.findlastkey/index.js
index 4d597174f..56107f7cf 100644
--- a/lodash.findlastkey/index.js
+++ b/lodash.findlastkey/index.js
@@ -1,5 +1,5 @@
 /**
- * lodash 4.4.0 (Custom Build) <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
  * Copyright jQuery Foundation and other contributors <https://jquery.org/>
  * Released under MIT license <https://lodash.com/license>
diff --git a/lodash.findlastkey/package.json b/lodash.findlastkey/package.json
index b3f70a145..fc52c0786 100644
--- a/lodash.findlastkey/package.json
+++ b/lodash.findlastkey/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.findlastkey",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.findLastKey` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -17,7 +17,7 @@
   "dependencies": {
     "lodash._basefind": "~3.0.0",
     "lodash._baseforright": "~4.0.0",
-    "lodash._baseiteratee": "~4.6.0",
+    "lodash._baseiteratee": "~4.7.0",
     "lodash.keys": "^4.0.0"
   }
 }
diff --git a/lodash.flatmap/README.md b/lodash.flatmap/README.md
index 917714524..f9b1f20d1 100644
--- a/lodash.flatmap/README.md
+++ b/lodash.flatmap/README.md
@@ -1,4 +1,4 @@
-# lodash.flatmap v4.4.1
+# lodash.flatmap v4.5.0
 
 The [lodash](https://lodash.com/) method `_.flatMap` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var flatMap = require('lodash.flatmap');
 ```
 
-See the [documentation](https://lodash.com/docs#flatMap) or [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash.flatmap) for more details.
+See the [documentation](https://lodash.com/docs#flatMap) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.flatmap) for more details.
diff --git a/lodash.flatmap/index.js b/lodash.flatmap/index.js
index a91428413..792ded030 100644
--- a/lodash.flatmap/index.js
+++ b/lodash.flatmap/index.js
@@ -62,7 +62,7 @@ var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
 
 /**
  * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
@@ -277,7 +277,7 @@ function mapToArray(map) {
 }
 
 /**
- * Creates a function that invokes `func` with its first argument transformed.
+ * Creates a unary function that invokes `func` with its argument transformed.
  *
  * @private
  * @param {Function} func The function to wrap.
@@ -309,6 +309,7 @@ function setToArray(set) {
 
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
+    funcProto = Function.prototype,
     objectProto = Object.prototype;
 
 /** Used to detect overreaching core-js shims. */
@@ -321,14 +322,14 @@ var maskSrcKey = (function() {
 }());
 
 /** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
+var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -347,8 +348,7 @@ var Symbol = root.Symbol,
     spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined;
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf,
-    nativeKeys = Object.keys;
+var nativeKeys = overArg(Object.keys, Object);
 
 /* Built-in method references that are verified to be native. */
 var DataView = getNative(root, 'DataView'),
@@ -816,11 +816,38 @@ Stack.prototype.get = stackGet;
 Stack.prototype.has = stackHas;
 Stack.prototype.set = stackSet;
 
+/**
+ * Creates an array of the enumerable property names of the array-like `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @param {boolean} inherited Specify returning inherited property names.
+ * @returns {Array} Returns the array of property names.
+ */
+function arrayLikeKeys(value, inherited) {
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
+  // Safari 9 makes `arguments.length` enumerable in strict mode.
+  var result = (isArray(value) || isArguments(value))
+    ? baseTimes(value.length, String)
+    : [];
+
+  var length = result.length,
+      skipIndexes = !!length;
+
+  for (var key in value) {
+    if ((inherited || hasOwnProperty.call(value, key)) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * Gets the index at which the `key` is found in `array` of key-value pairs.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} key The key to search for.
  * @returns {number} Returns the index of the matched value, else `-1`.
  */
@@ -934,23 +961,6 @@ function baseGetTag(value) {
   return objectToString.call(value);
 }
 
-/**
- * The base implementation of `_.has` without support for deep paths.
- *
- * @private
- * @param {Object} [object] The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
-function baseHas(object, key) {
-  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
-  // that are composed entirely of index properties, return `false` for
-  // `hasOwnProperty` checks of them.
-  return object != null &&
-    (hasOwnProperty.call(object, key) ||
-      (typeof object == 'object' && key in object && getPrototype(object) === null));
-}
-
 /**
  * The base implementation of `_.hasIn` without support for deep paths.
  *
@@ -1153,14 +1163,24 @@ function baseIteratee(value) {
 }
 
 /**
- * The base implementation of `_.keys` which doesn't skip the constructor
- * property of prototypes or treat sparse arrays as dense.
+ * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
  *
  * @private
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of property names.
  */
-var baseKeys = overArg(nativeKeys, Object);
+function baseKeys(object) {
+  if (!isPrototype(object)) {
+    return nativeKeys(object);
+  }
+  var result = [];
+  for (var key in Object(object)) {
+    if (hasOwnProperty.call(object, key) && key != 'constructor') {
+      result.push(key);
+    }
+  }
+  return result;
+}
 
 /**
  * The base implementation of `_.map` without support for iteratee shorthands.
@@ -1437,7 +1457,7 @@ function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
     case regexpTag:
     case stringTag:
       // Coerce regexes to strings and treat strings, primitives and objects,
-      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
       // for more details.
       return object == (other + '');
 
@@ -1499,7 +1519,7 @@ function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
   var index = objLength;
   while (index--) {
     var key = objProps[index];
-    if (!(isPartial ? key in other : baseHas(other, key))) {
+    if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
       return false;
     }
   }
@@ -1550,19 +1570,6 @@ function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
   return result;
 }
 
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
 /**
  * Gets the data for `map`.
  *
@@ -1611,15 +1618,6 @@ function getNative(object, key) {
   return baseIsNative(value) ? value : undefined;
 }
 
-/**
- * Gets the `[[Prototype]]` of `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {null|Object} Returns the `[[Prototype]]`.
- */
-var getPrototype = overArg(nativeGetPrototype, Object);
-
 /**
  * Gets the `toStringTag` of `value`.
  *
@@ -1630,7 +1628,7 @@ var getPrototype = overArg(nativeGetPrototype, Object);
 var getTag = baseGetTag;
 
 // Fallback for data views, maps, sets, and weak maps in IE 11,
-// for data views in Edge, and promises in Node.js.
+// for data views in Edge < 14, and promises in Node.js.
 if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
     (Map && getTag(new Map) != mapTag) ||
     (Promise && getTag(Promise.resolve()) != promiseTag) ||
@@ -1682,24 +1680,7 @@ function hasPath(object, path, hasFunc) {
   }
   var length = object ? object.length : 0;
   return !!length && isLength(length) && isIndex(key, length) &&
-    (isArray(object) || isString(object) || isArguments(object));
-}
-
-/**
- * Creates an array of index keys for `object` values of arrays,
- * `arguments` objects, and strings, otherwise `null` is returned.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array|null} Returns index keys, else `null`.
- */
-function indexKeys(object) {
-  var length = object ? object.length : undefined;
-  if (isLength(length) &&
-      (isArray(object) || isString(object) || isArguments(object))) {
-    return baseTimes(length, String);
-  }
-  return null;
+    (isArray(object) || isArguments(object));
 }
 
 /**
@@ -1957,7 +1938,7 @@ function map(collection, iteratee) {
  * **Note:** The cache is exposed as the `cache` property on the memoized
  * function. Its creation may be customized by replacing the `_.memoize.Cache`
  * constructor with one whose instances implement the
- * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
  * method interface of `delete`, `get`, `has`, and `set`.
  *
  * @static
@@ -2016,7 +1997,7 @@ memoize.Cache = MapCache;
 
 /**
  * Performs a
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * comparison between two values to determine if they are equivalent.
  *
  * @static
@@ -2069,7 +2050,7 @@ function eq(value, other) {
  * // => false
  */
 function isArguments(value) {
-  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
   return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
     (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
@@ -2125,7 +2106,7 @@ var isArray = Array.isArray;
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -2176,8 +2157,7 @@ function isArrayLikeObject(value) {
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -2185,16 +2165,15 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);
@@ -2216,7 +2195,7 @@ function isLength(value) {
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
@@ -2272,28 +2251,6 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
-/**
- * Checks if `value` is classified as a `String` primitive or object.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a string, else `false`.
- * @example
- *
- * _.isString('abc');
- * // => true
- *
- * _.isString(1);
- * // => false
- */
-function isString(value) {
-  return typeof value == 'string' ||
-    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
-}
-
 /**
  * Checks if `value` is classified as a `Symbol` primitive or object.
  *
@@ -2424,7 +2381,7 @@ function hasIn(object, path) {
  * Creates an array of the own enumerable property names of `object`.
  *
  * **Note:** Non-object values are coerced to objects. See the
- * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
  * for more details.
  *
  * @static
@@ -2449,23 +2406,7 @@ function hasIn(object, path) {
  * // => ['0', '1']
  */
 function keys(object) {
-  var isProto = isPrototype(object);
-  if (!(isProto || isArrayLike(object))) {
-    return baseKeys(object);
-  }
-  var indexes = indexKeys(object),
-      skipIndexes = !!indexes,
-      result = indexes || [],
-      length = result.length;
-
-  for (var key in object) {
-    if (baseHas(object, key) &&
-        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
-        !(isProto && key == 'constructor')) {
-      result.push(key);
-    }
-  }
-  return result;
+  return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
 }
 
 /**
diff --git a/lodash.flatmap/package.json b/lodash.flatmap/package.json
index f04ccc50b..1c6e3f1e7 100644
--- a/lodash.flatmap/package.json
+++ b/lodash.flatmap/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.flatmap",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The lodash method `_.flatMap` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.flattendepth/README.md b/lodash.flattendepth/README.md
index 27497e386..53283210c 100644
--- a/lodash.flattendepth/README.md
+++ b/lodash.flattendepth/README.md
@@ -1,4 +1,4 @@
-# lodash.flattendepth v4.4.2
+# lodash.flattendepth v4.5.0
 
 The [lodash](https://lodash.com/) method `_.flattenDepth` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var flattenDepth = require('lodash.flattendepth');
 ```
 
-See the [documentation](https://lodash.com/docs#flattenDepth) or [package source](https://github.com/lodash/lodash/blob/4.4.2-npm-packages/lodash.flattendepth) for more details.
+See the [documentation](https://lodash.com/docs#flattenDepth) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.flattendepth) for more details.
diff --git a/lodash.flattendepth/index.js b/lodash.flattendepth/index.js
index cd0834ea0..94d3afe77 100644
--- a/lodash.flattendepth/index.js
+++ b/lodash.flattendepth/index.js
@@ -1,5 +1,5 @@
 /**
- * lodash 4.4.2 (Custom Build) <https://lodash.com/>
+ * lodash 4.5.0 (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
  * Copyright jQuery Foundation and other contributors <https://jquery.org/>
  * Released under MIT license <https://lodash.com/license>
@@ -37,7 +37,8 @@ var freeParseInt = parseInt;
 var objectProto = Object.prototype;
 
 /**
- * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -98,8 +99,9 @@ function isFunction(value) {
 }
 
 /**
- * Checks if `value` is the [language type](https://es5.github.io/#x8) of `Object`.
- * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
  * @memberOf _
diff --git a/lodash.flattendepth/package.json b/lodash.flattendepth/package.json
index bf4705faa..a2106d46e 100644
--- a/lodash.flattendepth/package.json
+++ b/lodash.flattendepth/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.flattendepth",
-  "version": "4.4.2",
+  "version": "4.5.0",
   "description": "The lodash method `_.flattenDepth` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -15,6 +15,6 @@
   "repository": "lodash/lodash",
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
-    "lodash._baseflatten": "~4.1.0"
+    "lodash._baseflatten": "~4.2.0"
   }
 }
diff --git a/lodash.foreach/README.md b/lodash.foreach/README.md
index 4e5fd3f7f..a8f702ae9 100644
--- a/lodash.foreach/README.md
+++ b/lodash.foreach/README.md
@@ -1,4 +1,4 @@
-# lodash.foreach v4.4.1
+# lodash.foreach v4.5.0
 
 The [lodash](https://lodash.com/) method `_.forEach` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var forEach = require('lodash.foreach');
 ```
 
-See the [documentation](https://lodash.com/docs#forEach) or [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash.foreach) for more details.
+See the [documentation](https://lodash.com/docs#forEach) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.foreach) for more details.
diff --git a/lodash.foreach/index.js b/lodash.foreach/index.js
index cdc8cc702..8997499ea 100644
--- a/lodash.foreach/index.js
+++ b/lodash.foreach/index.js
@@ -13,8 +13,7 @@ var MAX_SAFE_INTEGER = 9007199254740991;
 /** `Object#toString` result references. */
 var argsTag = '[object Arguments]',
     funcTag = '[object Function]',
-    genTag = '[object GeneratorFunction]',
-    stringTag = '[object String]';
+    genTag = '[object GeneratorFunction]';
 
 /** Used to detect unsigned integer values. */
 var reIsUint = /^(?:0|[1-9]\d*)$/;
@@ -40,19 +39,6 @@ function arrayEach(array, iteratee) {
   return array;
 }
 
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
 /**
  * The base implementation of `_.times` without support for iteratee shorthands
  * or max array length checks.
@@ -73,7 +59,7 @@ function baseTimes(n, iteratee) {
 }
 
 /**
- * Creates a function that invokes `func` with its first argument transformed.
+ * Creates a unary function that invokes `func` with its argument transformed.
  *
  * @private
  * @param {Function} func The function to wrap.
@@ -94,7 +80,7 @@ var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -103,8 +89,34 @@ var objectToString = objectProto.toString;
 var propertyIsEnumerable = objectProto.propertyIsEnumerable;
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf,
-    nativeKeys = Object.keys;
+var nativeKeys = overArg(Object.keys, Object);
+
+/**
+ * Creates an array of the enumerable property names of the array-like `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @param {boolean} inherited Specify returning inherited property names.
+ * @returns {Array} Returns the array of property names.
+ */
+function arrayLikeKeys(value, inherited) {
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
+  // Safari 9 makes `arguments.length` enumerable in strict mode.
+  var result = (isArray(value) || isArguments(value))
+    ? baseTimes(value.length, String)
+    : [];
+
+  var length = result.length,
+      skipIndexes = !!length;
+
+  for (var key in value) {
+    if ((inherited || hasOwnProperty.call(value, key)) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
 
 /**
  * The base implementation of `_.forEach` without support for iteratee shorthands.
@@ -142,31 +154,24 @@ function baseForOwn(object, iteratee) {
 }
 
 /**
- * The base implementation of `_.has` without support for deep paths.
- *
- * @private
- * @param {Object} [object] The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
-function baseHas(object, key) {
-  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
-  // that are composed entirely of index properties, return `false` for
-  // `hasOwnProperty` checks of them.
-  return object != null &&
-    (hasOwnProperty.call(object, key) ||
-      (typeof object == 'object' && key in object && getPrototype(object) === null));
-}
-
-/**
- * The base implementation of `_.keys` which doesn't skip the constructor
- * property of prototypes or treat sparse arrays as dense.
+ * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
  *
  * @private
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of property names.
  */
-var baseKeys = overArg(nativeKeys, Object);
+function baseKeys(object) {
+  if (!isPrototype(object)) {
+    return nativeKeys(object);
+  }
+  var result = [];
+  for (var key in Object(object)) {
+    if (hasOwnProperty.call(object, key) && key != 'constructor') {
+      result.push(key);
+    }
+  }
+  return result;
+}
 
 /**
  * Creates a `baseEach` or `baseEachRight` function.
@@ -221,45 +226,6 @@ function createBaseFor(fromRight) {
   };
 }
 
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
-/**
- * Gets the `[[Prototype]]` of `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {null|Object} Returns the `[[Prototype]]`.
- */
-var getPrototype = overArg(nativeGetPrototype, Object);
-
-/**
- * Creates an array of index keys for `object` values of arrays,
- * `arguments` objects, and strings, otherwise `null` is returned.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array|null} Returns index keys, else `null`.
- */
-function indexKeys(object) {
-  var length = object ? object.length : undefined;
-  if (isLength(length) &&
-      (isArray(object) || isString(object) || isArguments(object))) {
-    return baseTimes(length, String);
-  }
-  return null;
-}
-
 /**
  * Checks if `value` is a valid array-like index.
  *
@@ -343,7 +309,7 @@ function forEach(collection, iteratee) {
  * // => false
  */
 function isArguments(value) {
-  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
   return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
     (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
@@ -399,7 +365,7 @@ var isArray = Array.isArray;
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -450,8 +416,7 @@ function isArrayLikeObject(value) {
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -459,16 +424,15 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);
@@ -490,7 +454,7 @@ function isLength(value) {
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
@@ -546,33 +510,11 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
-/**
- * Checks if `value` is classified as a `String` primitive or object.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a string, else `false`.
- * @example
- *
- * _.isString('abc');
- * // => true
- *
- * _.isString(1);
- * // => false
- */
-function isString(value) {
-  return typeof value == 'string' ||
-    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
-}
-
 /**
  * Creates an array of the own enumerable property names of `object`.
  *
  * **Note:** Non-object values are coerced to objects. See the
- * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
  * for more details.
  *
  * @static
@@ -597,23 +539,7 @@ function isString(value) {
  * // => ['0', '1']
  */
 function keys(object) {
-  var isProto = isPrototype(object);
-  if (!(isProto || isArrayLike(object))) {
-    return baseKeys(object);
-  }
-  var indexes = indexKeys(object),
-      skipIndexes = !!indexes,
-      result = indexes || [],
-      length = result.length;
-
-  for (var key in object) {
-    if (baseHas(object, key) &&
-        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
-        !(isProto && key == 'constructor')) {
-      result.push(key);
-    }
-  }
-  return result;
+  return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
 }
 
 /**
diff --git a/lodash.foreach/package.json b/lodash.foreach/package.json
index ce980e67d..d26fe2540 100644
--- a/lodash.foreach/package.json
+++ b/lodash.foreach/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.foreach",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The lodash method `_.forEach` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.forinright/README.md b/lodash.forinright/README.md
index 842d2cc2a..42eefe685 100644
--- a/lodash.forinright/README.md
+++ b/lodash.forinright/README.md
@@ -1,4 +1,4 @@
-# lodash.forinright v4.4.1
+# lodash.forinright v4.5.0
 
 The [lodash](https://lodash.com/) method `_.forInRight` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var forInRight = require('lodash.forinright');
 ```
 
-See the [documentation](https://lodash.com/docs#forInRight) or [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash.forinright) for more details.
+See the [documentation](https://lodash.com/docs#forInRight) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.forinright) for more details.
diff --git a/lodash.forinright/index.js b/lodash.forinright/index.js
index f9a4453d0..960faf6e9 100644
--- a/lodash.forinright/index.js
+++ b/lodash.forinright/index.js
@@ -13,34 +13,11 @@ var MAX_SAFE_INTEGER = 9007199254740991;
 /** `Object#toString` result references. */
 var argsTag = '[object Arguments]',
     funcTag = '[object Function]',
-    genTag = '[object GeneratorFunction]',
-    stringTag = '[object String]';
+    genTag = '[object GeneratorFunction]';
 
 /** Used to detect unsigned integer values. */
 var reIsUint = /^(?:0|[1-9]\d*)$/;
 
-/** Detect free variable `global` from Node.js. */
-var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
-
-/** Detect free variable `self`. */
-var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
-
-/** Used as a reference to the global object. */
-var root = freeGlobal || freeSelf || Function('return this')();
-
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
 /**
  * The base implementation of `_.times` without support for iteratee shorthands
  * or max array length checks.
@@ -60,23 +37,6 @@ function baseTimes(n, iteratee) {
   return result;
 }
 
-/**
- * Converts `iterator` to an array.
- *
- * @private
- * @param {Object} iterator The iterator to convert.
- * @returns {Array} Returns the converted array.
- */
-function iteratorToArray(iterator) {
-  var data,
-      result = [];
-
-  while (!(data = iterator.next()).done) {
-    result.push(data.value);
-  }
-  return result;
-}
-
 /** Used for built-in method references. */
 var objectProto = Object.prototype;
 
@@ -85,15 +45,40 @@ var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
 
 /** Built-in value references. */
-var Reflect = root.Reflect,
-    enumerate = Reflect ? Reflect.enumerate : undefined,
-    propertyIsEnumerable = objectProto.propertyIsEnumerable;
+var propertyIsEnumerable = objectProto.propertyIsEnumerable;
+
+/**
+ * Creates an array of the enumerable property names of the array-like `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @param {boolean} inherited Specify returning inherited property names.
+ * @returns {Array} Returns the array of property names.
+ */
+function arrayLikeKeys(value, inherited) {
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
+  // Safari 9 makes `arguments.length` enumerable in strict mode.
+  var result = (isArray(value) || isArguments(value))
+    ? baseTimes(value.length, String)
+    : [];
+
+  var length = result.length,
+      skipIndexes = !!length;
+
+  for (var key in value) {
+    if ((inherited || hasOwnProperty.call(value, key)) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
 
 /**
  * This function is like `baseFor` except that it iterates over properties
@@ -108,30 +93,27 @@ var Reflect = root.Reflect,
 var baseForRight = createBaseFor(true);
 
 /**
- * The base implementation of `_.keysIn` which doesn't skip the constructor
- * property of prototypes or treat sparse arrays as dense.
+ * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
  *
  * @private
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of property names.
  */
 function baseKeysIn(object) {
-  object = object == null ? object : Object(object);
+  if (!isObject(object)) {
+    return nativeKeysIn(object);
+  }
+  var isProto = isPrototype(object),
+      result = [];
 
-  var result = [];
   for (var key in object) {
-    result.push(key);
+    if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
+      result.push(key);
+    }
   }
   return result;
 }
 
-// Fallback for IE < 9 with es6-shim.
-if (enumerate && !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf')) {
-  baseKeysIn = function(object) {
-    return iteratorToArray(enumerate(object));
-  };
-}
-
 /**
  * Creates a base function for methods like `_.forIn` and `_.forOwn`.
  *
@@ -156,36 +138,6 @@ function createBaseFor(fromRight) {
   };
 }
 
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
-/**
- * Creates an array of index keys for `object` values of arrays,
- * `arguments` objects, and strings, otherwise `null` is returned.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array|null} Returns index keys, else `null`.
- */
-function indexKeys(object) {
-  var length = object ? object.length : undefined;
-  if (isLength(length) &&
-      (isArray(object) || isString(object) || isArguments(object))) {
-    return baseTimes(length, String);
-  }
-  return null;
-}
-
 /**
  * Checks if `value` is a valid array-like index.
  *
@@ -215,6 +167,25 @@ function isPrototype(value) {
   return value === proto;
 }
 
+/**
+ * This function is like
+ * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+ * except that it includes inherited enumerable properties.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+function nativeKeysIn(object) {
+  var result = [];
+  if (object != null) {
+    for (var key in Object(object)) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * Checks if `value` is likely an `arguments` object.
  *
@@ -234,7 +205,7 @@ function isPrototype(value) {
  * // => false
  */
 function isArguments(value) {
-  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
   return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
     (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
@@ -290,7 +261,7 @@ var isArray = Array.isArray;
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -341,8 +312,7 @@ function isArrayLikeObject(value) {
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -350,16 +320,15 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);
@@ -381,7 +350,7 @@ function isLength(value) {
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
@@ -437,28 +406,6 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
-/**
- * Checks if `value` is classified as a `String` primitive or object.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a string, else `false`.
- * @example
- *
- * _.isString('abc');
- * // => true
- *
- * _.isString(1);
- * // => false
- */
-function isString(value) {
-  return typeof value == 'string' ||
-    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
-}
-
 /**
  * This method is like `_.forIn` except that it iterates over properties of
  * `object` in the opposite order.
@@ -515,23 +462,7 @@ function forInRight(object, iteratee) {
  * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
  */
 function keysIn(object) {
-  var index = -1,
-      isProto = isPrototype(object),
-      props = baseKeysIn(object),
-      propsLength = props.length,
-      indexes = indexKeys(object),
-      skipIndexes = !!indexes,
-      result = indexes || [],
-      length = result.length;
-
-  while (++index < propsLength) {
-    var key = props[index];
-    if (!(skipIndexes && (key == 'length' || isIndex(key, length))) &&
-        !(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
-      result.push(key);
-    }
-  }
-  return result;
+  return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
 }
 
 /**
diff --git a/lodash.forinright/package.json b/lodash.forinright/package.json
index 7fb999258..6d214aa95 100644
--- a/lodash.forinright/package.json
+++ b/lodash.forinright/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.forinright",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The lodash method `_.forInRight` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.forownright/README.md b/lodash.forownright/README.md
index 20858d8de..50125f4c3 100644
--- a/lodash.forownright/README.md
+++ b/lodash.forownright/README.md
@@ -1,4 +1,4 @@
-# lodash.forownright v4.4.1
+# lodash.forownright v4.5.0
 
 The [lodash](https://lodash.com/) method `_.forOwnRight` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var forOwnRight = require('lodash.forownright');
 ```
 
-See the [documentation](https://lodash.com/docs#forOwnRight) or [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash.forownright) for more details.
+See the [documentation](https://lodash.com/docs#forOwnRight) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.forownright) for more details.
diff --git a/lodash.forownright/index.js b/lodash.forownright/index.js
index 29ca93f64..265f4c8cd 100644
--- a/lodash.forownright/index.js
+++ b/lodash.forownright/index.js
@@ -13,25 +13,11 @@ var MAX_SAFE_INTEGER = 9007199254740991;
 /** `Object#toString` result references. */
 var argsTag = '[object Arguments]',
     funcTag = '[object Function]',
-    genTag = '[object GeneratorFunction]',
-    stringTag = '[object String]';
+    genTag = '[object GeneratorFunction]';
 
 /** Used to detect unsigned integer values. */
 var reIsUint = /^(?:0|[1-9]\d*)$/;
 
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
 /**
  * The base implementation of `_.times` without support for iteratee shorthands
  * or max array length checks.
@@ -52,7 +38,7 @@ function baseTimes(n, iteratee) {
 }
 
 /**
- * Creates a function that invokes `func` with its first argument transformed.
+ * Creates a unary function that invokes `func` with its argument transformed.
  *
  * @private
  * @param {Function} func The function to wrap.
@@ -73,7 +59,7 @@ var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -82,8 +68,34 @@ var objectToString = objectProto.toString;
 var propertyIsEnumerable = objectProto.propertyIsEnumerable;
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf,
-    nativeKeys = Object.keys;
+var nativeKeys = overArg(Object.keys, Object);
+
+/**
+ * Creates an array of the enumerable property names of the array-like `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @param {boolean} inherited Specify returning inherited property names.
+ * @returns {Array} Returns the array of property names.
+ */
+function arrayLikeKeys(value, inherited) {
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
+  // Safari 9 makes `arguments.length` enumerable in strict mode.
+  var result = (isArray(value) || isArguments(value))
+    ? baseTimes(value.length, String)
+    : [];
+
+  var length = result.length,
+      skipIndexes = !!length;
+
+  for (var key in value) {
+    if ((inherited || hasOwnProperty.call(value, key)) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
 
 /**
  * This function is like `baseFor` except that it iterates over properties
@@ -110,31 +122,24 @@ function baseForOwnRight(object, iteratee) {
 }
 
 /**
- * The base implementation of `_.has` without support for deep paths.
- *
- * @private
- * @param {Object} [object] The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
-function baseHas(object, key) {
-  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
-  // that are composed entirely of index properties, return `false` for
-  // `hasOwnProperty` checks of them.
-  return object != null &&
-    (hasOwnProperty.call(object, key) ||
-      (typeof object == 'object' && key in object && getPrototype(object) === null));
-}
-
-/**
- * The base implementation of `_.keys` which doesn't skip the constructor
- * property of prototypes or treat sparse arrays as dense.
+ * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
  *
  * @private
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of property names.
  */
-var baseKeys = overArg(nativeKeys, Object);
+function baseKeys(object) {
+  if (!isPrototype(object)) {
+    return nativeKeys(object);
+  }
+  var result = [];
+  for (var key in Object(object)) {
+    if (hasOwnProperty.call(object, key) && key != 'constructor') {
+      result.push(key);
+    }
+  }
+  return result;
+}
 
 /**
  * Creates a base function for methods like `_.forIn` and `_.forOwn`.
@@ -160,45 +165,6 @@ function createBaseFor(fromRight) {
   };
 }
 
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
-/**
- * Gets the `[[Prototype]]` of `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {null|Object} Returns the `[[Prototype]]`.
- */
-var getPrototype = overArg(nativeGetPrototype, Object);
-
-/**
- * Creates an array of index keys for `object` values of arrays,
- * `arguments` objects, and strings, otherwise `null` is returned.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array|null} Returns index keys, else `null`.
- */
-function indexKeys(object) {
-  var length = object ? object.length : undefined;
-  if (isLength(length) &&
-      (isArray(object) || isString(object) || isArguments(object))) {
-    return baseTimes(length, String);
-  }
-  return null;
-}
-
 /**
  * Checks if `value` is a valid array-like index.
  *
@@ -247,7 +213,7 @@ function isPrototype(value) {
  * // => false
  */
 function isArguments(value) {
-  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
   return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
     (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
@@ -303,7 +269,7 @@ var isArray = Array.isArray;
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -354,8 +320,7 @@ function isArrayLikeObject(value) {
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -363,16 +328,15 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);
@@ -394,7 +358,7 @@ function isLength(value) {
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
@@ -450,28 +414,6 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
-/**
- * Checks if `value` is classified as a `String` primitive or object.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a string, else `false`.
- * @example
- *
- * _.isString('abc');
- * // => true
- *
- * _.isString(1);
- * // => false
- */
-function isString(value) {
-  return typeof value == 'string' ||
-    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
-}
-
 /**
  * This method is like `_.forOwn` except that it iterates over properties of
  * `object` in the opposite order.
@@ -506,7 +448,7 @@ function forOwnRight(object, iteratee) {
  * Creates an array of the own enumerable property names of `object`.
  *
  * **Note:** Non-object values are coerced to objects. See the
- * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
  * for more details.
  *
  * @static
@@ -531,23 +473,7 @@ function forOwnRight(object, iteratee) {
  * // => ['0', '1']
  */
 function keys(object) {
-  var isProto = isPrototype(object);
-  if (!(isProto || isArrayLike(object))) {
-    return baseKeys(object);
-  }
-  var indexes = indexKeys(object),
-      skipIndexes = !!indexes,
-      result = indexes || [],
-      length = result.length;
-
-  for (var key in object) {
-    if (baseHas(object, key) &&
-        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
-        !(isProto && key == 'constructor')) {
-      result.push(key);
-    }
-  }
-  return result;
+  return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
 }
 
 /**
diff --git a/lodash.forownright/package.json b/lodash.forownright/package.json
index 93d7ad91f..673725e92 100644
--- a/lodash.forownright/package.json
+++ b/lodash.forownright/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.forownright",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The lodash method `_.forOwnRight` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.groupby/README.md b/lodash.groupby/README.md
index d8cf269e8..b6c085c8c 100644
--- a/lodash.groupby/README.md
+++ b/lodash.groupby/README.md
@@ -1,4 +1,4 @@
-# lodash.groupby v4.4.0
+# lodash.groupby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.groupBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var groupBy = require('lodash.groupby');
 ```
 
-See the [documentation](https://lodash.com/docs#groupBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.groupby) for more details.
+See the [documentation](https://lodash.com/docs#groupBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.groupby) for more details.
diff --git a/lodash.groupby/index.js b/lodash.groupby/index.js
index aae44d5d0..f495da321 100644
--- a/lodash.groupby/index.js
+++ b/lodash.groupby/index.js
@@ -6,14 +6,126 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseEach = require('lodash._baseeach'),
-    baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
 
 /**
  * A specialized version of `baseAggregator` for arrays.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} setter The function to set `accumulator` values.
  * @param {Function} iteratee The iteratee to transform keys.
  * @param {Object} accumulator The initial aggregated object.
@@ -21,7 +133,7 @@ var baseEach = require('lodash._baseeach'),
  */
 function arrayAggregator(array, setter, iteratee, accumulator) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     var value = array[index];
@@ -30,12 +142,678 @@ function arrayAggregator(array, setter, iteratee, accumulator) {
   return accumulator;
 }
 
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
 /**
  * Aggregates elements of `collection` on `accumulator` with keys transformed
  * by `iteratee` and values set by `setter`.
@@ -54,6 +832,381 @@ function baseAggregator(collection, setter, iteratee, accumulator) {
   return accumulator;
 }
 
+/**
+ * The base implementation of `_.forEach` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ */
+var baseEach = createBaseEach(baseForOwn);
+
+/**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
+
+/**
+ * The base implementation of `_.forOwn` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+function baseForOwn(object, iteratee) {
+  return object && baseFor(object, iteratee, keys);
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
 /**
  * Creates a function like `_.groupBy`.
  *
@@ -67,10 +1220,604 @@ function createAggregator(setter, initializer) {
     var func = isArray(collection) ? arrayAggregator : baseAggregator,
         accumulator = initializer ? initializer() : {};
 
-    return func(collection, setter, baseIteratee(iteratee), accumulator);
+    return func(collection, setter, baseIteratee(iteratee, 2), accumulator);
   };
 }
 
+/**
+ * Creates a `baseEach` or `baseEachRight` function.
+ *
+ * @private
+ * @param {Function} eachFunc The function to iterate over a collection.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseEach(eachFunc, fromRight) {
+  return function(collection, iteratee) {
+    if (collection == null) {
+      return collection;
+    }
+    if (!isArrayLike(collection)) {
+      return eachFunc(collection, iteratee);
+    }
+    var length = collection.length,
+        index = fromRight ? length : -1,
+        iterable = Object(collection);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (iteratee(iterable[index], index, iterable) === false) {
+        break;
+      }
+    }
+    return collection;
+  };
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Creates an object composed of keys generated from the results of running
  * each element of `collection` thru `iteratee`. The order of grouped values
@@ -83,7 +1830,7 @@ function createAggregator(setter, initializer) {
  * @since 0.1.0
  * @category Collection
  * @param {Array|Object} collection The collection to iterate over.
- * @param {Array|Function|Object|string} [iteratee=_.identity]
+ * @param {Function} [iteratee=_.identity]
  *  The iteratee to transform keys.
  * @returns {Object} Returns the composed aggregate object.
  * @example
@@ -103,17 +1850,142 @@ var groupBy = createAggregator(function(result, value, key) {
   }
 });
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -130,4 +2002,419 @@ var groupBy = createAggregator(function(result, value, key) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = groupBy;
diff --git a/lodash.groupby/package.json b/lodash.groupby/package.json
index 05f1d87cd..48b48bec7 100644
--- a/lodash.groupby/package.json
+++ b/lodash.groupby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.groupby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.groupBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseeach": "~4.1.0",
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.has/README.md b/lodash.has/README.md
index 3e4114aeb..8327692c0 100644
--- a/lodash.has/README.md
+++ b/lodash.has/README.md
@@ -1,4 +1,4 @@
-# lodash.has v4.4.0
+# lodash.has v4.5.0
 
 The [lodash](https://lodash.com/) method `_.has` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var has = require('lodash.has');
 ```
 
-See the [documentation](https://lodash.com/docs#has) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.has) for more details.
+See the [documentation](https://lodash.com/docs#has) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.has) for more details.
diff --git a/lodash.has/index.js b/lodash.has/index.js
index cde34a3c6..0cd47976b 100644
--- a/lodash.has/index.js
+++ b/lodash.has/index.js
@@ -6,7 +6,12 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var stringToPath = require('lodash._stringtopath');
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
 /** Used as references for various `Number` constants. */
 var INFINITY = 1 / 0,
@@ -21,45 +26,32 @@ var argsTag = '[object Arguments]',
 
 /** Used to match property names within property paths. */
 var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
-    reIsPlainProp = /^\w*$/;
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
 
 /** Used to detect unsigned integer values. */
 var reIsUint = /^(?:0|[1-9]\d*)$/;
 
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
 
-/** Used to check objects for own properties. */
-var hasOwnProperty = objectProto.hasOwnProperty;
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
 
-/**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
- * of values.
- */
-var objectToString = objectProto.toString;
-
-/** Built-in value references. */
-var propertyIsEnumerable = objectProto.propertyIsEnumerable;
-
-/* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf;
-
-/**
- * The base implementation of `_.has` without support for deep paths.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
-function baseHas(object, key) {
-  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
-  // that are composed entirely of index properties, return `false` for
-  // `hasOwnProperty` checks of them.
-  return hasOwnProperty.call(object, key) ||
-    (typeof object == 'object' && key in object && getPrototype(object) === null);
-}
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
 
 /**
  * The base implementation of `_.property` without support for deep paths.
@@ -74,6 +66,474 @@ function baseProperty(key) {
   };
 }
 
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf;
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Casts `value` to a path array if it's not one.
  *
@@ -98,6 +558,34 @@ function castPath(value) {
  */
 var getLength = baseProperty('length');
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
 /**
  * Gets the `[[Prototype]]` of `value`.
  *
@@ -105,9 +593,7 @@ var getLength = baseProperty('length');
  * @param {*} value The value to query.
  * @returns {null|Object} Returns the `[[Prototype]]`.
  */
-function getPrototype(value) {
-  return nativeGetPrototype(Object(value));
-}
+var getPrototype = overArg(nativeGetPrototype, Object);
 
 /**
  * Checks if `path` exists on `object`.
@@ -176,6 +662,46 @@ function isKey(value, object) {
     (object != null && value in Object(object));
 }
 
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
 /**
  * Converts `value` to a string key if it's not a string or symbol.
  *
@@ -191,6 +717,128 @@ function toKey(value) {
   return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
 }
 
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
 /**
  * Checks if `value` is likely an `arguments` object.
  *
@@ -199,7 +847,7 @@ function toKey(value) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
  *  else `false`.
  * @example
  *
@@ -221,11 +869,9 @@ function isArguments(value) {
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -308,8 +954,7 @@ function isArrayLikeObject(value) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -424,8 +1069,7 @@ function isObjectLike(value) {
  * @memberOf _
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
  * @example
  *
  * _.isString('abc');
@@ -447,8 +1091,7 @@ function isString(value) {
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  * @example
  *
  * _.isSymbol(Symbol.iterator);
@@ -462,6 +1105,31 @@ function isSymbol(value) {
     (isObjectLike(value) && objectToString.call(value) == symbolTag);
 }
 
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
 /**
  * Checks if `path` is a direct property of `object`.
  *
diff --git a/lodash.has/package.json b/lodash.has/package.json
index 29f7c8d3d..43e41b044 100644
--- a/lodash.has/package.json
+++ b/lodash.has/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.has",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.has` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,8 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._stringtopath": "~4.8.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.hasin/README.md b/lodash.hasin/README.md
index 919bd3856..c1acba59e 100644
--- a/lodash.hasin/README.md
+++ b/lodash.hasin/README.md
@@ -1,4 +1,4 @@
-# lodash.hasin v4.4.0
+# lodash.hasin v4.5.0
 
 The [lodash](https://lodash.com/) method `_.hasIn` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var hasIn = require('lodash.hasin');
 ```
 
-See the [documentation](https://lodash.com/docs#hasIn) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.hasin) for more details.
+See the [documentation](https://lodash.com/docs#hasIn) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.hasin) for more details.
diff --git a/lodash.hasin/index.js b/lodash.hasin/index.js
index c065ce192..5a37a127c 100644
--- a/lodash.hasin/index.js
+++ b/lodash.hasin/index.js
@@ -6,7 +6,12 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var stringToPath = require('lodash._stringtopath');
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
 /** Used as references for various `Number` constants. */
 var INFINITY = 1 / 0,
@@ -21,38 +26,32 @@ var argsTag = '[object Arguments]',
 
 /** Used to match property names within property paths. */
 var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
-    reIsPlainProp = /^\w*$/;
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
 
 /** Used to detect unsigned integer values. */
 var reIsUint = /^(?:0|[1-9]\d*)$/;
 
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
 
-/** Used to check objects for own properties. */
-var hasOwnProperty = objectProto.hasOwnProperty;
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
 
-/**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
- * of values.
- */
-var objectToString = objectProto.toString;
-
-/** Built-in value references. */
-var propertyIsEnumerable = objectProto.propertyIsEnumerable;
-
-/**
- * The base implementation of `_.hasIn` without support for deep paths.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
-function baseHasIn(object, key) {
-  return key in Object(object);
-}
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
 
 /**
  * The base implementation of `_.property` without support for deep paths.
@@ -67,6 +66,452 @@ function baseProperty(key) {
   };
 }
 
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Casts `value` to a path array if it's not one.
  *
@@ -91,6 +536,34 @@ function castPath(value) {
  */
 var getLength = baseProperty('length');
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
 /**
  * Checks if `path` exists on `object`.
  *
@@ -158,6 +631,46 @@ function isKey(value, object) {
     (object != null && value in Object(object));
 }
 
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
 /**
  * Converts `value` to a string key if it's not a string or symbol.
  *
@@ -173,6 +686,128 @@ function toKey(value) {
   return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
 }
 
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
 /**
  * Checks if `value` is likely an `arguments` object.
  *
@@ -181,7 +816,7 @@ function toKey(value) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
  *  else `false`.
  * @example
  *
@@ -203,11 +838,9 @@ function isArguments(value) {
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -290,8 +923,7 @@ function isArrayLikeObject(value) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -406,8 +1038,7 @@ function isObjectLike(value) {
  * @memberOf _
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
  * @example
  *
  * _.isString('abc');
@@ -429,8 +1060,7 @@ function isString(value) {
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  * @example
  *
  * _.isSymbol(Symbol.iterator);
@@ -444,6 +1074,31 @@ function isSymbol(value) {
     (isObjectLike(value) && objectToString.call(value) == symbolTag);
 }
 
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
 /**
  * Checks if `path` is a direct or inherited property of `object`.
  *
diff --git a/lodash.hasin/package.json b/lodash.hasin/package.json
index 01ca925b8..1b208b136 100644
--- a/lodash.hasin/package.json
+++ b/lodash.hasin/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.hasin",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.hasIn` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,8 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._stringtopath": "~4.8.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.intersectionby/README.md b/lodash.intersectionby/README.md
index 2029c4d74..61677ed78 100644
--- a/lodash.intersectionby/README.md
+++ b/lodash.intersectionby/README.md
@@ -1,4 +1,4 @@
-# lodash.intersectionby v4.4.0
+# lodash.intersectionby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.intersectionBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var intersectionBy = require('lodash.intersectionby');
 ```
 
-See the [documentation](https://lodash.com/docs#intersectionBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.intersectionby) for more details.
+See the [documentation](https://lodash.com/docs#intersectionBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.intersectionby) for more details.
diff --git a/lodash.intersectionby/package.json b/lodash.intersectionby/package.json
index 42cd249c8..9fd13f4d5 100644
--- a/lodash.intersectionby/package.json
+++ b/lodash.intersectionby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.intersectionby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.intersectionBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -16,7 +16,7 @@
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
     "lodash._baseintersection": "~4.5.0",
-    "lodash._baseiteratee": "~4.6.0",
+    "lodash._baseiteratee": "~4.7.0",
     "lodash.rest": "^4.0.0"
   }
 }
diff --git a/lodash.invertby/README.md b/lodash.invertby/README.md
index bda8b3466..9e80db401 100644
--- a/lodash.invertby/README.md
+++ b/lodash.invertby/README.md
@@ -1,4 +1,4 @@
-# lodash.invertby v4.4.0
+# lodash.invertby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.invertBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var invertBy = require('lodash.invertby');
 ```
 
-See the [documentation](https://lodash.com/docs#invertBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.invertby) for more details.
+See the [documentation](https://lodash.com/docs#invertBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.invertby) for more details.
diff --git a/lodash.invertby/index.js b/lodash.invertby/index.js
index e1e6b8b38..3405fd1cd 100644
--- a/lodash.invertby/index.js
+++ b/lodash.invertby/index.js
@@ -1,5 +1,5 @@
 /**
- * lodash 4.4.0 (Custom Build) <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
  * Copyright jQuery Foundation and other contributors <https://jquery.org/>
  * Released under MIT license <https://lodash.com/license>
diff --git a/lodash.invertby/package.json b/lodash.invertby/package.json
index 9c59831e2..61115fa1f 100644
--- a/lodash.invertby/package.json
+++ b/lodash.invertby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.invertby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.invertBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -16,7 +16,7 @@
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
     "lodash._basefor": "~3.0.0",
-    "lodash._baseiteratee": "~4.6.0",
+    "lodash._baseiteratee": "~4.7.0",
     "lodash.keys": "^4.0.0"
   }
 }
diff --git a/lodash.invoke/README.md b/lodash.invoke/README.md
index fa305c209..2c46dff4a 100644
--- a/lodash.invoke/README.md
+++ b/lodash.invoke/README.md
@@ -1,4 +1,4 @@
-# lodash.invoke v4.4.0
+# lodash.invoke v4.5.0
 
 The [lodash](https://lodash.com/) method `_.invoke` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var invoke = require('lodash.invoke');
 ```
 
-See the [documentation](https://lodash.com/docs#invoke) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.invoke) for more details.
+See the [documentation](https://lodash.com/docs#invoke) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.invoke) for more details.
diff --git a/lodash.invoke/index.js b/lodash.invoke/index.js
index d7a3932cf..5a8a501c8 100644
--- a/lodash.invoke/index.js
+++ b/lodash.invoke/index.js
@@ -6,19 +6,46 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseSlice = require('lodash._baseslice'),
-    rest = require('lodash.rest'),
-    stringToPath = require('lodash._stringtopath');
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
 /** Used as references for various `Number` constants. */
 var INFINITY = 1 / 0;
 
 /** `Object#toString` result references. */
-var symbolTag = '[object Symbol]';
+var funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    symbolTag = '[object Symbol]';
 
 /** Used to match property names within property paths. */
 var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
-    reIsPlainProp = /^\w*$/;
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
 
 /**
  * A faster alternative to `Function#apply`, this function invokes `func`
@@ -31,8 +58,7 @@ var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
  * @returns {*} Returns the result of `func`.
  */
 function apply(func, thisArg, args) {
-  var length = args.length;
-  switch (length) {
+  switch (args.length) {
     case 0: return func.call(thisArg);
     case 1: return func.call(thisArg, args[0]);
     case 2: return func.call(thisArg, args[0], args[1]);
@@ -41,8 +67,55 @@ function apply(func, thisArg, args) {
   return func.apply(thisArg, args);
 }
 
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
@@ -51,6 +124,349 @@ var objectProto = Object.prototype;
  */
 var objectToString = objectProto.toString;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeMax = Math.max;
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
 /**
  * The base implementation of `_.get` without support for default values.
  *
@@ -91,6 +507,101 @@ function baseInvoke(object, path, args) {
   return func == null ? undefined : apply(func, object, args);
 }
 
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.rest` which doesn't validate or coerce arguments.
+ *
+ * @private
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @returns {Function} Returns the new function.
+ */
+function baseRest(func, start) {
+  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+  return function() {
+    var args = arguments,
+        index = -1,
+        length = nativeMax(args.length - start, 0),
+        array = Array(length);
+
+    while (++index < length) {
+      array[index] = args[start + index];
+    }
+    index = -1;
+    var otherArgs = Array(start + 1);
+    while (++index < start) {
+      otherArgs[index] = args[index];
+    }
+    otherArgs[start] = array;
+    return apply(func, this, otherArgs);
+  };
+}
+
+/**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+function baseSlice(array, start, end) {
+  var index = -1,
+      length = array.length;
+
+  if (start < 0) {
+    start = -start > length ? 0 : (length + start);
+  }
+  end = end > length ? length : end;
+  if (end < 0) {
+    end += length;
+  }
+  length = start > end ? 0 : ((end - start) >>> 0);
+  start >>>= 0;
+
+  var result = Array(length);
+  while (++index < length) {
+    result[index] = array[index + start];
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Casts `value` to a path array if it's not one.
  *
@@ -102,6 +613,34 @@ function castPath(value) {
   return isArray(value) ? value : stringToPath(value);
 }
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
 /**
  * Checks if `value` is a property name and not a property path.
  *
@@ -123,6 +662,31 @@ function isKey(value, object) {
     (object != null && value in Object(object));
 }
 
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
 /**
  * Gets the parent value at `path` of `object`.
  *
@@ -135,6 +699,21 @@ function parent(object, path) {
   return path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
 }
 
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
 /**
  * Converts `value` to a string key if it's not a string or symbol.
  *
@@ -150,6 +729,25 @@ function toKey(value) {
   return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
 }
 
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Gets the last element of `array`.
  *
@@ -169,17 +767,118 @@ function last(array) {
   return length ? array[length - 1] : undefined;
 }
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -196,6 +895,61 @@ function last(array) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
 /**
  * Checks if `value` is object-like. A value is object-like if it's not `null`
  * and has a `typeof` result of "object".
@@ -232,8 +986,7 @@ function isObjectLike(value) {
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  * @example
  *
  * _.isSymbol(Symbol.iterator);
@@ -247,6 +1000,31 @@ function isSymbol(value) {
     (isObjectLike(value) && objectToString.call(value) == symbolTag);
 }
 
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
 /**
  * Invokes the method at `path` of `object`.
  *
@@ -265,6 +1043,6 @@ function isSymbol(value) {
  * _.invoke(object, 'a[0].b.c.slice', 1, 3);
  * // => [2, 3]
  */
-var invoke = rest(baseInvoke);
+var invoke = baseRest(baseInvoke);
 
 module.exports = invoke;
diff --git a/lodash.invoke/package.json b/lodash.invoke/package.json
index 3d563fe5a..03fa5de23 100644
--- a/lodash.invoke/package.json
+++ b/lodash.invoke/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.invoke",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.invoke` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseslice": "~4.0.0",
-    "lodash._stringtopath": "~4.8.0",
-    "lodash.rest": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.invokemap/README.md b/lodash.invokemap/README.md
index 869c387b7..7dc2ee1ce 100644
--- a/lodash.invokemap/README.md
+++ b/lodash.invokemap/README.md
@@ -1,4 +1,4 @@
-# lodash.invokemap v4.4.0
+# lodash.invokemap v4.5.0
 
 The [lodash](https://lodash.com/) method `_.invokeMap` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var invokeMap = require('lodash.invokemap');
 ```
 
-See the [documentation](https://lodash.com/docs#invokeMap) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.invokemap) for more details.
+See the [documentation](https://lodash.com/docs#invokeMap) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.invokemap) for more details.
diff --git a/lodash.invokemap/index.js b/lodash.invokemap/index.js
index 5d8f7b516..9fd47b333 100644
--- a/lodash.invokemap/index.js
+++ b/lodash.invokemap/index.js
@@ -6,23 +6,52 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseEach = require('lodash._baseeach'),
-    baseSlice = require('lodash._baseslice'),
-    rest = require('lodash.rest'),
-    stringToPath = require('lodash._stringtopath');
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
 /** Used as references for various `Number` constants. */
 var INFINITY = 1 / 0,
     MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
-var funcTag = '[object Function]',
+var argsTag = '[object Arguments]',
+    funcTag = '[object Function]',
     genTag = '[object GeneratorFunction]',
+    stringTag = '[object String]',
     symbolTag = '[object Symbol]';
 
 /** Used to match property names within property paths. */
 var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
-    reIsPlainProp = /^\w*$/;
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
 
 /**
  * A faster alternative to `Function#apply`, this function invokes `func`
@@ -35,8 +64,7 @@ var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
  * @returns {*} Returns the result of `func`.
  */
 function apply(func, thisArg, args) {
-  var length = args.length;
-  switch (length) {
+  switch (args.length) {
     case 0: return func.call(thisArg);
     case 1: return func.call(thisArg, args[0]);
     case 2: return func.call(thisArg, args[0], args[1]);
@@ -45,8 +73,101 @@ function apply(func, thisArg, args) {
   return func.apply(thisArg, args);
 }
 
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
@@ -55,6 +176,387 @@ var objectProto = Object.prototype;
  */
 var objectToString = objectProto.toString;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys,
+    nativeMax = Math.max;
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.forEach` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ */
+var baseEach = createBaseEach(baseForOwn);
+
+/**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
+
+/**
+ * The base implementation of `_.forOwn` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+function baseForOwn(object, iteratee) {
+  return object && baseFor(object, iteratee, keys);
+}
+
 /**
  * The base implementation of `_.get` without support for default values.
  *
@@ -75,6 +577,23 @@ function baseGet(object, path) {
   return (index && index == length) ? object : undefined;
 }
 
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
 /**
  * The base implementation of `_.invoke` without support for individual
  * method arguments.
@@ -96,18 +615,110 @@ function baseInvoke(object, path, args) {
 }
 
 /**
- * The base implementation of `_.property` without support for deep paths.
+ * The base implementation of `_.isNative` without bad shim checks.
  *
  * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
  */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.rest` which doesn't validate or coerce arguments.
+ *
+ * @private
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @returns {Function} Returns the new function.
+ */
+function baseRest(func, start) {
+  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+  return function() {
+    var args = arguments,
+        index = -1,
+        length = nativeMax(args.length - start, 0),
+        array = Array(length);
+
+    while (++index < length) {
+      array[index] = args[start + index];
+    }
+    index = -1;
+    var otherArgs = Array(start + 1);
+    while (++index < start) {
+      otherArgs[index] = args[index];
+    }
+    otherArgs[start] = array;
+    return apply(func, this, otherArgs);
   };
 }
 
+/**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+function baseSlice(array, start, end) {
+  var index = -1,
+      length = array.length;
+
+  if (start < 0) {
+    start = -start > length ? 0 : (length + start);
+  }
+  end = end > length ? length : end;
+  if (end < 0) {
+    end += length;
+  }
+  length = start > end ? 0 : ((end - start) >>> 0);
+  start >>>= 0;
+
+  var result = Array(length);
+  while (++index < length) {
+    result[index] = array[index + start];
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Casts `value` to a path array if it's not one.
  *
@@ -119,6 +730,59 @@ function castPath(value) {
   return isArray(value) ? value : stringToPath(value);
 }
 
+/**
+ * Creates a `baseEach` or `baseEachRight` function.
+ *
+ * @private
+ * @param {Function} eachFunc The function to iterate over a collection.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseEach(eachFunc, fromRight) {
+  return function(collection, iteratee) {
+    if (collection == null) {
+      return collection;
+    }
+    if (!isArrayLike(collection)) {
+      return eachFunc(collection, iteratee);
+    }
+    var length = collection.length,
+        index = fromRight ? length : -1,
+        iterable = Object(collection);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (iteratee(iterable[index], index, iterable) === false) {
+        break;
+      }
+    }
+    return collection;
+  };
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
 /**
  * Gets the "length" property value of `object`.
  *
@@ -132,6 +796,75 @@ function castPath(value) {
  */
 var getLength = baseProperty('length');
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
 /**
  * Checks if `value` is a property name and not a property path.
  *
@@ -153,6 +886,45 @@ function isKey(value, object) {
     (object != null && value in Object(object));
 }
 
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
 /**
  * Gets the parent value at `path` of `object`.
  *
@@ -165,6 +937,21 @@ function parent(object, path) {
   return path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
 }
 
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
 /**
  * Converts `value` to a string key if it's not a string or symbol.
  *
@@ -180,6 +967,25 @@ function toKey(value) {
   return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
 }
 
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Gets the last element of `array`.
  *
@@ -202,8 +1008,8 @@ function last(array) {
 /**
  * Invokes the method at `path` of each element in `collection`, returning
  * an array of the results of each invoked method. Any additional arguments
- * are provided to each invoked method. If `methodName` is a function, it's
- * invoked for and `this` bound to, each element in `collection`.
+ * are provided to each invoked method. If `path` is a function, it's invoked
+ * for, and `this` bound to, each element in `collection`.
  *
  * @static
  * @memberOf _
@@ -222,7 +1028,7 @@ function last(array) {
  * _.invokeMap([123, 456], String.prototype.split, '');
  * // => [['1', '2', '3'], ['4', '5', '6']]
  */
-var invokeMap = rest(function(collection, path, args) {
+var invokeMap = baseRest(function(collection, path, args) {
   var index = -1,
       isFunc = typeof path == 'function',
       isProp = isKey(path),
@@ -235,17 +1041,142 @@ var invokeMap = rest(function(collection, path, args) {
   return result;
 });
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -291,6 +1222,35 @@ function isArrayLike(value) {
   return value != null && isLength(getLength(value)) && !isFunction(value);
 }
 
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
 /**
  * Checks if `value` is classified as a `Function` object.
  *
@@ -299,8 +1259,7 @@ function isArrayLike(value) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -407,6 +1366,28 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
 /**
  * Checks if `value` is classified as a `Symbol` primitive or object.
  *
@@ -415,8 +1396,7 @@ function isObjectLike(value) {
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  * @example
  *
  * _.isSymbol(Symbol.iterator);
@@ -430,4 +1410,77 @@ function isSymbol(value) {
     (isObjectLike(value) && objectToString.call(value) == symbolTag);
 }
 
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 module.exports = invokeMap;
diff --git a/lodash.invokemap/package.json b/lodash.invokemap/package.json
index c27be2a63..275146276 100644
--- a/lodash.invokemap/package.json
+++ b/lodash.invokemap/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.invokemap",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.invokeMap` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,11 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseeach": "~4.1.0",
-    "lodash._baseslice": "~4.0.0",
-    "lodash._stringtopath": "~4.8.0",
-    "lodash.rest": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.iteratee/README.md b/lodash.iteratee/README.md
index f0f763469..6b04f731f 100644
--- a/lodash.iteratee/README.md
+++ b/lodash.iteratee/README.md
@@ -1,4 +1,4 @@
-# lodash.iteratee v4.4.0
+# lodash.iteratee v4.5.0
 
 The [lodash](https://lodash.com/) method `_.iteratee` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var iteratee = require('lodash.iteratee');
 ```
 
-See the [documentation](https://lodash.com/docs#iteratee) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.iteratee) for more details.
+See the [documentation](https://lodash.com/docs#iteratee) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.iteratee) for more details.
diff --git a/lodash.iteratee/index.js b/lodash.iteratee/index.js
index b0a60fda6..66c28f5c1 100644
--- a/lodash.iteratee/index.js
+++ b/lodash.iteratee/index.js
@@ -1,5 +1,5 @@
 /**
- * lodash 4.4.0 (Custom Build) <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
  * Copyright jQuery Foundation and other contributors <https://jquery.org/>
  * Released under MIT license <https://lodash.com/license>
diff --git a/lodash.iteratee/package.json b/lodash.iteratee/package.json
index ebd03e118..ccba6eba8 100644
--- a/lodash.iteratee/package.json
+++ b/lodash.iteratee/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.iteratee",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.iteratee` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -16,6 +16,6 @@
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
     "lodash._baseclone": "~4.5.0",
-    "lodash._baseiteratee": "~4.6.0"
+    "lodash._baseiteratee": "~4.7.0"
   }
 }
diff --git a/lodash.keyby/README.md b/lodash.keyby/README.md
index 54d268596..cf5e7ecd3 100644
--- a/lodash.keyby/README.md
+++ b/lodash.keyby/README.md
@@ -1,4 +1,4 @@
-# lodash.keyby v4.4.0
+# lodash.keyby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.keyBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var keyBy = require('lodash.keyby');
 ```
 
-See the [documentation](https://lodash.com/docs#keyBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.keyby) for more details.
+See the [documentation](https://lodash.com/docs#keyBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.keyby) for more details.
diff --git a/lodash.keyby/index.js b/lodash.keyby/index.js
index 0082c4046..eb26129a0 100644
--- a/lodash.keyby/index.js
+++ b/lodash.keyby/index.js
@@ -6,14 +6,126 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseEach = require('lodash._baseeach'),
-    baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
 
 /**
  * A specialized version of `baseAggregator` for arrays.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} setter The function to set `accumulator` values.
  * @param {Function} iteratee The iteratee to transform keys.
  * @param {Object} accumulator The initial aggregated object.
@@ -21,7 +133,7 @@ var baseEach = require('lodash._baseeach'),
  */
 function arrayAggregator(array, setter, iteratee, accumulator) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     var value = array[index];
@@ -30,6 +142,678 @@ function arrayAggregator(array, setter, iteratee, accumulator) {
   return accumulator;
 }
 
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
 /**
  * Aggregates elements of `collection` on `accumulator` with keys transformed
  * by `iteratee` and values set by `setter`.
@@ -48,6 +832,381 @@ function baseAggregator(collection, setter, iteratee, accumulator) {
   return accumulator;
 }
 
+/**
+ * The base implementation of `_.forEach` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ */
+var baseEach = createBaseEach(baseForOwn);
+
+/**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
+
+/**
+ * The base implementation of `_.forOwn` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+function baseForOwn(object, iteratee) {
+  return object && baseFor(object, iteratee, keys);
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
 /**
  * Creates a function like `_.groupBy`.
  *
@@ -61,10 +1220,604 @@ function createAggregator(setter, initializer) {
     var func = isArray(collection) ? arrayAggregator : baseAggregator,
         accumulator = initializer ? initializer() : {};
 
-    return func(collection, setter, baseIteratee(iteratee), accumulator);
+    return func(collection, setter, baseIteratee(iteratee, 2), accumulator);
   };
 }
 
+/**
+ * Creates a `baseEach` or `baseEachRight` function.
+ *
+ * @private
+ * @param {Function} eachFunc The function to iterate over a collection.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseEach(eachFunc, fromRight) {
+  return function(collection, iteratee) {
+    if (collection == null) {
+      return collection;
+    }
+    if (!isArrayLike(collection)) {
+      return eachFunc(collection, iteratee);
+    }
+    var length = collection.length,
+        index = fromRight ? length : -1,
+        iterable = Object(collection);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (iteratee(iterable[index], index, iterable) === false) {
+        break;
+      }
+    }
+    return collection;
+  };
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Creates an object composed of keys generated from the results of running
  * each element of `collection` thru `iteratee`. The corresponding value of
@@ -76,7 +1829,7 @@ function createAggregator(setter, initializer) {
  * @since 4.0.0
  * @category Collection
  * @param {Array|Object} collection The collection to iterate over.
- * @param {Array|Function|Object|string} [iteratee=_.identity]
+ * @param {Function} [iteratee=_.identity]
  *  The iteratee to transform keys.
  * @returns {Object} Returns the composed aggregate object.
  * @example
@@ -98,17 +1851,142 @@ var keyBy = createAggregator(function(result, value, key) {
   result[key] = value;
 });
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -125,4 +2003,419 @@ var keyBy = createAggregator(function(result, value, key) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = keyBy;
diff --git a/lodash.keyby/package.json b/lodash.keyby/package.json
index 5462159a9..46f80613c 100644
--- a/lodash.keyby/package.json
+++ b/lodash.keyby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.keyby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.keyBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseeach": "~4.1.0",
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.map/README.md b/lodash.map/README.md
index a63dd02df..546865aa9 100644
--- a/lodash.map/README.md
+++ b/lodash.map/README.md
@@ -1,4 +1,4 @@
-# lodash.map v4.4.0
+# lodash.map v4.5.0
 
 The [lodash](https://lodash.com/) method `_.map` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var map = require('lodash.map');
 ```
 
-See the [documentation](https://lodash.com/docs#map) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.map) for more details.
+See the [documentation](https://lodash.com/docs#map) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.map) for more details.
diff --git a/lodash.map/index.js b/lodash.map/index.js
index 5679cfc68..70ad48504 100644
--- a/lodash.map/index.js
+++ b/lodash.map/index.js
@@ -6,28 +6,133 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseEach = require('lodash._baseeach'),
-    baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
 
 /** Used as references for various `Number` constants. */
-var MAX_SAFE_INTEGER = 9007199254740991;
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
-var funcTag = '[object Function]',
-    genTag = '[object GeneratorFunction]';
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
 
 /**
  * A specialized version of `_.map` for arrays without support for iteratee
  * shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @returns {Array} Returns the new mapped array.
  */
 function arrayMap(array, iteratee) {
   var index = -1,
-      length = array.length,
+      length = array ? array.length : 0,
       result = Array(length);
 
   while (++index < length) {
@@ -36,8 +141,170 @@ function arrayMap(array, iteratee) {
   return result;
 }
 
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
@@ -46,6 +313,800 @@ var objectProto = Object.prototype;
  */
 var objectToString = objectProto.toString;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.forEach` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ */
+var baseEach = createBaseEach(baseForOwn);
+
+/**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
+
+/**
+ * The base implementation of `_.forOwn` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+function baseForOwn(object, iteratee) {
+  return object && baseFor(object, iteratee, keys);
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
 /**
  * The base implementation of `_.map` without support for iteratee shorthands.
  *
@@ -65,18 +1126,373 @@ function baseMap(collection, iteratee) {
 }
 
 /**
- * The base implementation of `_.property` without support for deep paths.
+ * The base implementation of `_.matches` which doesn't clone `source`.
  *
  * @private
- * @param {string} key The key of the property to get.
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
  * @returns {Function} Returns the new accessor function.
  */
-function baseProperty(key) {
+function basePropertyDeep(path) {
   return function(object) {
-    return object == null ? undefined : object[key];
+    return baseGet(object, path);
   };
 }
 
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * Creates a `baseEach` or `baseEachRight` function.
+ *
+ * @private
+ * @param {Function} eachFunc The function to iterate over a collection.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseEach(eachFunc, fromRight) {
+  return function(collection, iteratee) {
+    if (collection == null) {
+      return collection;
+    }
+    if (!isArrayLike(collection)) {
+      return eachFunc(collection, iteratee);
+    }
+    var length = collection.length,
+        index = fromRight ? length : -1,
+        iterable = Object(collection);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (iteratee(iterable[index], index, iterable) === false) {
+        break;
+      }
+    }
+    return collection;
+  };
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
 /**
  * Gets the "length" property value of `object`.
  *
@@ -90,6 +1506,300 @@ function baseProperty(key) {
  */
 var getLength = baseProperty('length');
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Creates an array of values by running each element in `collection` thru
  * `iteratee`. The iteratee is invoked with three arguments:
@@ -109,8 +1819,7 @@ var getLength = baseProperty('length');
  * @since 0.1.0
  * @category Collection
  * @param {Array|Object} collection The collection to iterate over.
- * @param {Array|Function|Object|string} [iteratee=_.identity]
- *  The function invoked per iteration.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  * @returns {Array} Returns the new mapped array.
  * @example
  *
@@ -138,17 +1847,142 @@ function map(collection, iteratee) {
   return func(collection, baseIteratee(iteratee, 3));
 }
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -194,6 +2028,35 @@ function isArrayLike(value) {
   return value != null && isLength(getLength(value)) && !isFunction(value);
 }
 
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
 /**
  * Checks if `value` is classified as a `Function` object.
  *
@@ -202,8 +2065,7 @@ function isArrayLike(value) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -282,4 +2144,274 @@ function isObject(value) {
   return !!value && (type == 'object' || type == 'function');
 }
 
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = map;
diff --git a/lodash.map/package.json b/lodash.map/package.json
index 67c6add81..182b31c8e 100644
--- a/lodash.map/package.json
+++ b/lodash.map/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.map",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.map` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseeach": "~4.1.0",
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.mapkeys/README.md b/lodash.mapkeys/README.md
index faf5ba015..3666b804c 100644
--- a/lodash.mapkeys/README.md
+++ b/lodash.mapkeys/README.md
@@ -1,4 +1,4 @@
-# lodash.mapkeys v4.4.0
+# lodash.mapkeys v4.5.0
 
 The [lodash](https://lodash.com/) method `_.mapKeys` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var mapKeys = require('lodash.mapkeys');
 ```
 
-See the [documentation](https://lodash.com/docs#mapKeys) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.mapkeys) for more details.
+See the [documentation](https://lodash.com/docs#mapKeys) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.mapkeys) for more details.
diff --git a/lodash.mapkeys/index.js b/lodash.mapkeys/index.js
index a058782b0..8cc71dd8a 100644
--- a/lodash.mapkeys/index.js
+++ b/lodash.mapkeys/index.js
@@ -6,9 +6,805 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseFor = require('lodash._basefor'),
-    baseIteratee = require('lodash._baseiteratee'),
-    keys = require('lodash.keys');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
 
 /**
  * The base implementation of `_.forOwn` without support for iteratee shorthands.
@@ -22,6 +818,1432 @@ function baseForOwn(object, iteratee) {
   return object && baseFor(object, iteratee, keys);
 }
 
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * The opposite of `_.mapValues`; this method creates an object with the
  * same values as `object` and keys generated by running each own enumerable
@@ -33,8 +2255,7 @@ function baseForOwn(object, iteratee) {
  * @since 3.8.0
  * @category Object
  * @param {Object} object The object to iterate over.
- * @param {Array|Function|Object|string} [iteratee=_.identity]
- *  The function invoked per iteration.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  * @returns {Object} Returns the new mapped object.
  * @see _.mapValues
  * @example
@@ -54,4 +2275,50 @@ function mapKeys(object, iteratee) {
   return result;
 }
 
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = mapKeys;
diff --git a/lodash.mapkeys/package.json b/lodash.mapkeys/package.json
index d59164b9f..e605d8d2f 100644
--- a/lodash.mapkeys/package.json
+++ b/lodash.mapkeys/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.mapkeys",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.mapKeys` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._basefor": "~3.0.0",
-    "lodash._baseiteratee": "~4.7.0",
-    "lodash.keys": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.mapvalues/README.md b/lodash.mapvalues/README.md
index f0d9817d4..b72767459 100644
--- a/lodash.mapvalues/README.md
+++ b/lodash.mapvalues/README.md
@@ -1,4 +1,4 @@
-# lodash.mapvalues v4.4.0
+# lodash.mapvalues v4.5.0
 
 The [lodash](https://lodash.com/) method `_.mapValues` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var mapValues = require('lodash.mapvalues');
 ```
 
-See the [documentation](https://lodash.com/docs#mapValues) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.mapvalues) for more details.
+See the [documentation](https://lodash.com/docs#mapValues) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.mapvalues) for more details.
diff --git a/lodash.mapvalues/index.js b/lodash.mapvalues/index.js
index 298bc1675..8a2b2049e 100644
--- a/lodash.mapvalues/index.js
+++ b/lodash.mapvalues/index.js
@@ -6,9 +6,805 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseFor = require('lodash._basefor'),
-    baseIteratee = require('lodash._baseiteratee'),
-    keys = require('lodash.keys');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
 
 /**
  * The base implementation of `_.forOwn` without support for iteratee shorthands.
@@ -22,6 +818,1432 @@ function baseForOwn(object, iteratee) {
   return object && baseFor(object, iteratee, keys);
 }
 
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * Creates an object with the same keys as `object` and values generated
  * by running each own enumerable string keyed property of `object` thru
@@ -33,8 +2255,7 @@ function baseForOwn(object, iteratee) {
  * @since 2.4.0
  * @category Object
  * @param {Object} object The object to iterate over.
- * @param {Array|Function|Object|string} [iteratee=_.identity]
- *  The function invoked per iteration.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  * @returns {Object} Returns the new mapped object.
  * @see _.mapKeys
  * @example
@@ -61,4 +2282,50 @@ function mapValues(object, iteratee) {
   return result;
 }
 
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = mapValues;
diff --git a/lodash.mapvalues/package.json b/lodash.mapvalues/package.json
index 29115ee0b..bf8082531 100644
--- a/lodash.mapvalues/package.json
+++ b/lodash.mapvalues/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.mapvalues",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.mapValues` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._basefor": "~3.0.0",
-    "lodash._baseiteratee": "~4.7.0",
-    "lodash.keys": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.matches/README.md b/lodash.matches/README.md
index c45fb0d67..8dc58daed 100644
--- a/lodash.matches/README.md
+++ b/lodash.matches/README.md
@@ -1,4 +1,4 @@
-# lodash.matches v4.4.0
+# lodash.matches v4.5.0
 
 The [lodash](https://lodash.com/) method `_.matches` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var matches = require('lodash.matches');
 ```
 
-See the [documentation](https://lodash.com/docs#matches) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.matches) for more details.
+See the [documentation](https://lodash.com/docs#matches) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.matches) for more details.
diff --git a/lodash.matches/index.js b/lodash.matches/index.js
index 5f20d1cb7..d3e67200b 100644
--- a/lodash.matches/index.js
+++ b/lodash.matches/index.js
@@ -6,9 +6,6 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseClone = require('lodash._baseclone'),
-    keys = require('lodash.keys'),
-    root = require('lodash._root');
 
 /** Used as the size to enable large array optimizations. */
 var LARGE_ARRAY_SIZE = 200;
@@ -59,9 +56,15 @@ var arrayBufferTag = '[object ArrayBuffer]',
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
+/** Used to match `RegExp` flags from their coerced string values. */
+var reFlags = /\w*$/;
+
 /** Used to detect host constructors (Safari). */
 var reIsHostCtor = /^\[object .+?Constructor\]$/;
 
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
 /** Used to identify `toStringTag` values of typed arrays. */
 var typedArrayTags = {};
 typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
@@ -78,24 +81,144 @@ typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
 typedArrayTags[setTag] = typedArrayTags[stringTag] =
 typedArrayTags[weakMapTag] = false;
 
+/** Used to identify `toStringTag` values supported by `_.clone`. */
+var cloneableTags = {};
+cloneableTags[argsTag] = cloneableTags[arrayTag] =
+cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
+cloneableTags[boolTag] = cloneableTags[dateTag] =
+cloneableTags[float32Tag] = cloneableTags[float64Tag] =
+cloneableTags[int8Tag] = cloneableTags[int16Tag] =
+cloneableTags[int32Tag] = cloneableTags[mapTag] =
+cloneableTags[numberTag] = cloneableTags[objectTag] =
+cloneableTags[regexpTag] = cloneableTags[setTag] =
+cloneableTags[stringTag] = cloneableTags[symbolTag] =
+cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
+cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
+cloneableTags[errorTag] = cloneableTags[funcTag] =
+cloneableTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
 /**
- * A specialized version of `_.map` for arrays without support for iteratee
- * shorthands.
+ * Adds the key-value `pair` to `map`.
  *
  * @private
- * @param {Array} array The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns the new mapped array.
+ * @param {Object} map The map to modify.
+ * @param {Array} pair The key-value pair to add.
+ * @returns {Object} Returns `map`.
  */
-function arrayMap(array, iteratee) {
+function addMapEntry(map, pair) {
+  // Don't return `map.set` because it's not chainable in IE 11.
+  map.set(pair[0], pair[1]);
+  return map;
+}
+
+/**
+ * Adds `value` to `set`.
+ *
+ * @private
+ * @param {Object} set The set to modify.
+ * @param {*} value The value to add.
+ * @returns {Object} Returns `set`.
+ */
+function addSetEntry(set, value) {
+  // Don't return `set.add` because it's not chainable in IE 11.
+  set.add(value);
+  return set;
+}
+
+/**
+ * A specialized version of `_.forEach` for arrays without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns `array`.
+ */
+function arrayEach(array, iteratee) {
   var index = -1,
-      length = array.length,
-      result = Array(length);
+      length = array ? array.length : 0;
 
   while (++index < length) {
-    result[index] = iteratee(array[index], index, array);
+    if (iteratee(array[index], index, array) === false) {
+      break;
+    }
   }
-  return result;
+  return array;
+}
+
+/**
+ * Appends the elements of `values` to `array`.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {Array} values The values to append.
+ * @returns {Array} Returns `array`.
+ */
+function arrayPush(array, values) {
+  var index = -1,
+      length = values.length,
+      offset = array.length;
+
+  while (++index < length) {
+    array[offset + index] = values[index];
+  }
+  return array;
+}
+
+/**
+ * A specialized version of `_.reduce` for arrays without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {*} [accumulator] The initial value.
+ * @param {boolean} [initAccum] Specify using the first element of `array` as
+ *  the initial value.
+ * @returns {*} Returns the accumulated value.
+ */
+function arrayReduce(array, iteratee, accumulator, initAccum) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  if (initAccum && length) {
+    accumulator = array[++index];
+  }
+  while (++index < length) {
+    accumulator = iteratee(accumulator, array[index], index, array);
+  }
+  return accumulator;
 }
 
 /**
@@ -103,14 +226,14 @@ function arrayMap(array, iteratee) {
  * shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} predicate The function invoked per iteration.
  * @returns {boolean} Returns `true` if any element passes the predicate check,
  *  else `false`.
  */
 function arraySome(array, predicate) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     if (predicate(array[index], index, array)) {
@@ -121,18 +244,60 @@ function arraySome(array, predicate) {
 }
 
 /**
- * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
- * of key-value pairs for `object` corresponding to the property names of `props`.
+ * The base implementation of `_.property` without support for deep paths.
  *
  * @private
- * @param {Object} object The object to query.
- * @param {Array} props The property names to get values for.
- * @returns {Object} Returns the key-value pairs.
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
  */
-function baseToPairs(object, props) {
-  return arrayMap(props, function(key) {
-    return [key, object[key]];
-  });
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
 }
 
 /**
@@ -171,6 +336,20 @@ function mapToArray(map) {
   return result;
 }
 
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
 /**
  * Converts `set` to an array of its values.
  *
@@ -188,27 +367,19 @@ function setToArray(set) {
   return result;
 }
 
-/**
- * Converts `set` to its value-value pairs.
- *
- * @private
- * @param {Object} set The set to convert.
- * @returns {Array} Returns the value-value pairs.
- */
-function setToPairs(set) {
-  var index = -1,
-      result = Array(set.size);
-
-  set.forEach(function(value) {
-    result[++index] = [value, value];
-  });
-  return result;
-}
-
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
     objectProto = Object.prototype;
 
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
 /** Used to resolve the decompiled source of functions. */
 var funcToString = Function.prototype.toString;
 
@@ -229,12 +400,18 @@ var reIsNative = RegExp('^' +
 );
 
 /** Built-in value references. */
-var Symbol = root.Symbol,
+var Buffer = moduleExports ? root.Buffer : undefined,
+    Symbol = root.Symbol,
     Uint8Array = root.Uint8Array,
+    objectCreate = Object.create,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
     splice = arrayProto.splice;
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf;
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeGetSymbols = Object.getOwnPropertySymbols,
+    nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
+    nativeKeys = Object.keys;
 
 /* Built-in method references that are verified to be native. */
 var DataView = getNative(root, 'DataView'),
@@ -682,8 +859,13 @@ function stackHas(key) {
  */
 function stackSet(key, value) {
   var cache = this.__data__;
-  if (cache instanceof ListCache && cache.__data__.length == LARGE_ARRAY_SIZE) {
-    cache = this.__data__ = new MapCache(cache.__data__);
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
   }
   cache.set(key, value);
   return this;
@@ -696,6 +878,24 @@ Stack.prototype.get = stackGet;
 Stack.prototype.has = stackHas;
 Stack.prototype.set = stackSet;
 
+/**
+ * Assigns `value` to `key` of `object` if the existing value is not equivalent
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * for equality comparisons.
+ *
+ * @private
+ * @param {Object} object The object to modify.
+ * @param {string} key The key of the property to assign.
+ * @param {*} value The value to assign.
+ */
+function assignValue(object, key, value) {
+  var objValue = object[key];
+  if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
+      (value === undefined && !(key in object))) {
+    object[key] = value;
+  }
+}
+
 /**
  * Gets the index at which the `key` is found in `array` of key-value pairs.
  *
@@ -715,10 +915,140 @@ function assocIndexOf(array, key) {
 }
 
 /**
- * The base implementation of `_.has` without support for deep paths.
+ * The base implementation of `_.assign` without support for multiple sources
+ * or `customizer` functions.
+ *
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @returns {Object} Returns `object`.
+ */
+function baseAssign(object, source) {
+  return object && copyObject(source, keys(source), object);
+}
+
+/**
+ * The base implementation of `_.clone` and `_.cloneDeep` which tracks
+ * traversed objects.
+ *
+ * @private
+ * @param {*} value The value to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @param {boolean} [isFull] Specify a clone including symbols.
+ * @param {Function} [customizer] The function to customize cloning.
+ * @param {string} [key] The key of `value`.
+ * @param {Object} [object] The parent object of `value`.
+ * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
+ * @returns {*} Returns the cloned value.
+ */
+function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
+  var result;
+  if (customizer) {
+    result = object ? customizer(value, key, object, stack) : customizer(value);
+  }
+  if (result !== undefined) {
+    return result;
+  }
+  if (!isObject(value)) {
+    return value;
+  }
+  var isArr = isArray(value);
+  if (isArr) {
+    result = initCloneArray(value);
+    if (!isDeep) {
+      return copyArray(value, result);
+    }
+  } else {
+    var tag = getTag(value),
+        isFunc = tag == funcTag || tag == genTag;
+
+    if (isBuffer(value)) {
+      return cloneBuffer(value, isDeep);
+    }
+    if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
+      if (isHostObject(value)) {
+        return object ? value : {};
+      }
+      result = initCloneObject(isFunc ? {} : value);
+      if (!isDeep) {
+        return copySymbols(value, baseAssign(result, value));
+      }
+    } else {
+      if (!cloneableTags[tag]) {
+        return object ? value : {};
+      }
+      result = initCloneByTag(value, tag, baseClone, isDeep);
+    }
+  }
+  // Check for circular references and return its corresponding clone.
+  stack || (stack = new Stack);
+  var stacked = stack.get(value);
+  if (stacked) {
+    return stacked;
+  }
+  stack.set(value, result);
+
+  if (!isArr) {
+    var props = isFull ? getAllKeys(value) : keys(value);
+  }
+  arrayEach(props || value, function(subValue, key) {
+    if (props) {
+      key = subValue;
+      subValue = value[key];
+    }
+    // Recursively populate clone (susceptible to call stack limits).
+    assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
+  });
+  if (!isFull) {
+    stack['delete'](value);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.create` without support for assigning
+ * properties to the created object.
+ *
+ * @private
+ * @param {Object} prototype The object to inherit from.
+ * @returns {Object} Returns the new object.
+ */
+function baseCreate(proto) {
+  return isObject(proto) ? objectCreate(proto) : {};
+}
+
+/**
+ * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
+ * `keysFunc` and `symbolsFunc` to get the enumerable property names and
+ * symbols of `object`.
  *
  * @private
  * @param {Object} object The object to query.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @param {Function} symbolsFunc The function to get the symbols of `object`.
+ * @returns {Array} Returns the array of property names and symbols.
+ */
+function baseGetAllKeys(object, keysFunc, symbolsFunc) {
+  var result = keysFunc(object);
+  return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
  * @param {Array|string} key The key to check.
  * @returns {boolean} Returns `true` if `key` exists, else `false`.
  */
@@ -726,8 +1056,9 @@ function baseHas(object, key) {
   // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
   // that are composed entirely of index properties, return `false` for
   // `hasOwnProperty` checks of them.
-  return hasOwnProperty.call(object, key) ||
-    (typeof object == 'object' && key in object && getPrototype(object) === null);
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
 }
 
 /**
@@ -867,6 +1198,44 @@ function baseIsMatch(object, source, matchData, customizer) {
   return true;
 }
 
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
 /**
  * The base implementation of `_.matches` which doesn't clone `source`.
  *
@@ -885,23 +1254,170 @@ function baseMatches(source) {
 }
 
 /**
- * Creates a `_.toPairs` or `_.toPairsIn` function.
+ * Creates a clone of  `buffer`.
  *
  * @private
- * @param {Function} keysFunc The function to get the keys of a given object.
- * @returns {Function} Returns the new pairs function.
+ * @param {Buffer} buffer The buffer to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Buffer} Returns the cloned buffer.
  */
-function createToPairs(keysFunc) {
-  return function(object) {
-    var tag = getTag(object);
-    if (tag == mapTag) {
-      return mapToArray(object);
-    }
-    if (tag == setTag) {
-      return setToPairs(object);
-    }
-    return baseToPairs(object, keysFunc(object));
-  };
+function cloneBuffer(buffer, isDeep) {
+  if (isDeep) {
+    return buffer.slice();
+  }
+  var result = new buffer.constructor(buffer.length);
+  buffer.copy(result);
+  return result;
+}
+
+/**
+ * Creates a clone of `arrayBuffer`.
+ *
+ * @private
+ * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
+ * @returns {ArrayBuffer} Returns the cloned array buffer.
+ */
+function cloneArrayBuffer(arrayBuffer) {
+  var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
+  new Uint8Array(result).set(new Uint8Array(arrayBuffer));
+  return result;
+}
+
+/**
+ * Creates a clone of `dataView`.
+ *
+ * @private
+ * @param {Object} dataView The data view to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned data view.
+ */
+function cloneDataView(dataView, isDeep) {
+  var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
+  return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
+}
+
+/**
+ * Creates a clone of `map`.
+ *
+ * @private
+ * @param {Object} map The map to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned map.
+ */
+function cloneMap(map, isDeep, cloneFunc) {
+  var array = isDeep ? cloneFunc(mapToArray(map), true) : mapToArray(map);
+  return arrayReduce(array, addMapEntry, new map.constructor);
+}
+
+/**
+ * Creates a clone of `regexp`.
+ *
+ * @private
+ * @param {Object} regexp The regexp to clone.
+ * @returns {Object} Returns the cloned regexp.
+ */
+function cloneRegExp(regexp) {
+  var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
+  result.lastIndex = regexp.lastIndex;
+  return result;
+}
+
+/**
+ * Creates a clone of `set`.
+ *
+ * @private
+ * @param {Object} set The set to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned set.
+ */
+function cloneSet(set, isDeep, cloneFunc) {
+  var array = isDeep ? cloneFunc(setToArray(set), true) : setToArray(set);
+  return arrayReduce(array, addSetEntry, new set.constructor);
+}
+
+/**
+ * Creates a clone of the `symbol` object.
+ *
+ * @private
+ * @param {Object} symbol The symbol object to clone.
+ * @returns {Object} Returns the cloned symbol object.
+ */
+function cloneSymbol(symbol) {
+  return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
+}
+
+/**
+ * Creates a clone of `typedArray`.
+ *
+ * @private
+ * @param {Object} typedArray The typed array to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned typed array.
+ */
+function cloneTypedArray(typedArray, isDeep) {
+  var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
+  return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
+}
+
+/**
+ * Copies the values of `source` to `array`.
+ *
+ * @private
+ * @param {Array} source The array to copy values from.
+ * @param {Array} [array=[]] The array to copy values to.
+ * @returns {Array} Returns `array`.
+ */
+function copyArray(source, array) {
+  var index = -1,
+      length = source.length;
+
+  array || (array = Array(length));
+  while (++index < length) {
+    array[index] = source[index];
+  }
+  return array;
+}
+
+/**
+ * Copies properties of `source` to `object`.
+ *
+ * @private
+ * @param {Object} source The object to copy properties from.
+ * @param {Array} props The property identifiers to copy.
+ * @param {Object} [object={}] The object to copy properties to.
+ * @param {Function} [customizer] The function to customize copied values.
+ * @returns {Object} Returns `object`.
+ */
+function copyObject(source, props, object, customizer) {
+  object || (object = {});
+
+  var index = -1,
+      length = props.length;
+
+  while (++index < length) {
+    var key = props[index];
+
+    var newValue = customizer
+      ? customizer(object[key], source[key], key, object, source)
+      : undefined;
+
+    assignValue(object, key, newValue === undefined ? source[key] : newValue);
+  }
+  return object;
+}
+
+/**
+ * Copies own symbol properties of `source` to `object`.
+ *
+ * @private
+ * @param {Object} source The object to copy symbols from.
+ * @param {Object} [object={}] The object to copy symbols to.
+ * @returns {Object} Returns `object`.
+ */
+function copySymbols(source, object) {
+  return copyObject(source, getSymbols(source), object);
 }
 
 /**
@@ -928,7 +1444,7 @@ function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
   }
   // Assume cyclic values are equal.
   var stacked = stack.get(array);
-  if (stacked) {
+  if (stacked && stack.get(other)) {
     return stacked == other;
   }
   var index = -1,
@@ -936,6 +1452,7 @@ function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
       seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
 
   stack.set(array, other);
+  stack.set(other, array);
 
   // Ignore non-index properties.
   while (++index < arrLength) {
@@ -1014,18 +1531,14 @@ function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
 
     case boolTag:
     case dateTag:
-      // Coerce dates and booleans to numbers, dates to milliseconds and
-      // booleans to `1` or `0` treating invalid dates coerced to `NaN` as
-      // not equal.
-      return +object == +other;
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
 
     case errorTag:
       return object.name == other.name && object.message == other.message;
 
-    case numberTag:
-      // Treat `NaN` vs. `NaN` as equal.
-      return (object != +object) ? other != +other : object == +other;
-
     case regexpTag:
     case stringTag:
       // Coerce regexes to strings and treat strings, primitives and objects,
@@ -1049,10 +1562,12 @@ function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
         return stacked == other;
       }
       bitmask |= UNORDERED_COMPARE_FLAG;
-      stack.set(object, other);
 
       // Recursively compare objects (susceptible to call stack limits).
-      return equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
 
     case symbolTag:
       if (symbolValueOf) {
@@ -1095,11 +1610,12 @@ function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
   }
   // Assume cyclic values are equal.
   var stacked = stack.get(object);
-  if (stacked) {
+  if (stacked && stack.get(other)) {
     return stacked == other;
   }
   var result = true;
   stack.set(object, other);
+  stack.set(other, object);
 
   var skipCtor = isPartial;
   while (++index < objLength) {
@@ -1138,6 +1654,30 @@ function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
   return result;
 }
 
+/**
+ * Creates an array of own enumerable property names and symbols of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names and symbols.
+ */
+function getAllKeys(object) {
+  return baseGetAllKeys(object, keys, getSymbols);
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
 /**
  * Gets the data for `map`.
  *
@@ -1161,11 +1701,14 @@ function getMapData(map, key) {
  * @returns {Array} Returns the match data of `object`.
  */
 function getMatchData(object) {
-  var result = toPairs(object),
+  var result = keys(object),
       length = result.length;
 
   while (length--) {
-    result[length][2] = isStrictComparable(result[length][1]);
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
   }
   return result;
 }
@@ -1179,8 +1722,8 @@ function getMatchData(object) {
  * @returns {*} Returns the function if it's native, else `undefined`.
  */
 function getNative(object, key) {
-  var value = object[key];
-  return isNative(value) ? value : undefined;
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
 }
 
 /**
@@ -1190,9 +1733,16 @@ function getNative(object, key) {
  * @param {*} value The value to query.
  * @returns {null|Object} Returns the `[[Prototype]]`.
  */
-function getPrototype(value) {
-  return nativeGetPrototype(Object(value));
-}
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Creates an array of the own enumerable symbol properties of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of symbols.
+ */
+var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArray;
 
 /**
  * Gets the `toStringTag` of `value`.
@@ -1201,9 +1751,7 @@ function getPrototype(value) {
  * @param {*} value The value to query.
  * @returns {string} Returns the `toStringTag`.
  */
-function getTag(value) {
-  return objectToString.call(value);
-}
+var getTag = baseGetTag;
 
 // Fallback for data views, maps, sets, and weak maps in IE 11,
 // for data views in Edge, and promises in Node.js.
@@ -1230,6 +1778,119 @@ if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
   };
 }
 
+/**
+ * Initializes an array clone.
+ *
+ * @private
+ * @param {Array} array The array to clone.
+ * @returns {Array} Returns the initialized clone.
+ */
+function initCloneArray(array) {
+  var length = array.length,
+      result = array.constructor(length);
+
+  // Add properties assigned by `RegExp#exec`.
+  if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
+    result.index = array.index;
+    result.input = array.input;
+  }
+  return result;
+}
+
+/**
+ * Initializes an object clone.
+ *
+ * @private
+ * @param {Object} object The object to clone.
+ * @returns {Object} Returns the initialized clone.
+ */
+function initCloneObject(object) {
+  return (typeof object.constructor == 'function' && !isPrototype(object))
+    ? baseCreate(getPrototype(object))
+    : {};
+}
+
+/**
+ * Initializes an object clone based on its `toStringTag`.
+ *
+ * **Note:** This function only supports cloning values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to clone.
+ * @param {string} tag The `toStringTag` of the object to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the initialized clone.
+ */
+function initCloneByTag(object, tag, cloneFunc, isDeep) {
+  var Ctor = object.constructor;
+  switch (tag) {
+    case arrayBufferTag:
+      return cloneArrayBuffer(object);
+
+    case boolTag:
+    case dateTag:
+      return new Ctor(+object);
+
+    case dataViewTag:
+      return cloneDataView(object, isDeep);
+
+    case float32Tag: case float64Tag:
+    case int8Tag: case int16Tag: case int32Tag:
+    case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
+      return cloneTypedArray(object, isDeep);
+
+    case mapTag:
+      return cloneMap(object, isDeep, cloneFunc);
+
+    case numberTag:
+    case stringTag:
+      return new Ctor(object);
+
+    case regexpTag:
+      return cloneRegExp(object);
+
+    case setTag:
+      return cloneSet(object, isDeep, cloneFunc);
+
+    case symbolTag:
+      return cloneSymbol(object);
+  }
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
 /**
  * Checks if `value` is suitable for use as unique object key.
  *
@@ -1244,6 +1905,31 @@ function isKeyable(value) {
     : (value === null);
 }
 
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
 /**
  * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
  *
@@ -1308,8 +1994,8 @@ function toSource(func) {
  * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  * @example
  *
- * var object = { 'user': 'fred' };
- * var other = { 'user': 'fred' };
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
  *
  * _.eq(object, object);
  * // => true
@@ -1330,17 +2016,39 @@ function eq(value, other) {
   return value === other || (value !== value && other !== other);
 }
 
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -1357,6 +2065,83 @@ function eq(value, other) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is a buffer.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.3.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
+ * @example
+ *
+ * _.isBuffer(new Buffer(2));
+ * // => true
+ *
+ * _.isBuffer(new Uint8Array(2));
+ * // => false
+ */
+var isBuffer = nativeIsBuffer || stubFalse;
+
 /**
  * Checks if `value` is classified as a `Function` object.
  *
@@ -1365,8 +2150,7 @@ var isArray = Array.isArray;
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -1474,29 +2258,25 @@ function isObjectLike(value) {
 }
 
 /**
- * Checks if `value` is a native function.
+ * Checks if `value` is classified as a `String` primitive or object.
  *
  * @static
+ * @since 0.1.0
  * @memberOf _
- * @since 3.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a native function,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
  * @example
  *
- * _.isNative(Array.prototype.push);
+ * _.isString('abc');
  * // => true
  *
- * _.isNative(_);
+ * _.isString(1);
  * // => false
  */
-function isNative(value) {
-  if (!isObject(value)) {
-    return false;
-  }
-  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
-  return pattern.test(toSource(value));
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
 }
 
 /**
@@ -1507,8 +2287,7 @@ function isNative(value) {
  * @since 3.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
  * @example
  *
  * _.isTypedArray(new Uint8Array);
@@ -1517,23 +2296,21 @@ function isNative(value) {
  * _.isTypedArray([]);
  * // => false
  */
-function isTypedArray(value) {
-  return isObjectLike(value) &&
-    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
-}
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
 
 /**
- * Creates an array of own enumerable string keyed-value pairs for `object`
- * which can be consumed by `_.fromPairs`. If `object` is a map or set, its
- * entries are returned.
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
  *
  * @static
+ * @since 0.1.0
  * @memberOf _
- * @since 4.0.0
- * @alias entries
  * @category Object
  * @param {Object} object The object to query.
- * @returns {Array} Returns the key-value pairs.
+ * @returns {Array} Returns the array of property names.
  * @example
  *
  * function Foo() {
@@ -1543,10 +2320,31 @@ function isTypedArray(value) {
  *
  * Foo.prototype.c = 3;
  *
- * _.toPairs(new Foo);
- * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
  */
-var toPairs = createToPairs(keys);
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
 
 /**
  * Creates a function that performs a partial deep comparison between a given
@@ -1564,16 +2362,55 @@ var toPairs = createToPairs(keys);
  * @returns {Function} Returns the new spec function.
  * @example
  *
- * var users = [
- *   { 'user': 'barney', 'age': 36, 'active': true },
- *   { 'user': 'fred',   'age': 40, 'active': false }
+ * var objects = [
+ *   { 'a': 1, 'b': 2, 'c': 3 },
+ *   { 'a': 4, 'b': 5, 'c': 6 }
  * ];
  *
- * _.filter(users, _.matches({ 'age': 40, 'active': false }));
- * // => [{ 'user': 'fred', 'age': 40, 'active': false }]
+ * _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));
+ * // => [{ 'a': 4, 'b': 5, 'c': 6 }]
  */
 function matches(source) {
   return baseMatches(baseClone(source, true));
 }
 
+/**
+ * This method returns a new empty array.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {Array} Returns the new empty array.
+ * @example
+ *
+ * var arrays = _.times(2, _.stubArray);
+ *
+ * console.log(arrays);
+ * // => [[], []]
+ *
+ * console.log(arrays[0] === arrays[1]);
+ * // => false
+ */
+function stubArray() {
+  return [];
+}
+
+/**
+ * This method returns `false`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {boolean} Returns `false`.
+ * @example
+ *
+ * _.times(2, _.stubFalse);
+ * // => [false, false]
+ */
+function stubFalse() {
+  return false;
+}
+
 module.exports = matches;
diff --git a/lodash.matches/package.json b/lodash.matches/package.json
index 81e8ea677..297fc50d3 100644
--- a/lodash.matches/package.json
+++ b/lodash.matches/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.matches",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.matches` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseclone": "~4.5.0",
-    "lodash._root": "~3.0.0",
-    "lodash.keys": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.matchesproperty/README.md b/lodash.matchesproperty/README.md
index 802849ba3..4e401e6b8 100644
--- a/lodash.matchesproperty/README.md
+++ b/lodash.matchesproperty/README.md
@@ -1,4 +1,4 @@
-# lodash.matchesproperty v4.4.1
+# lodash.matchesproperty v4.5.0
 
 The [lodash](https://lodash.com/) method `_.matchesProperty` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var matchesProperty = require('lodash.matchesproperty');
 ```
 
-See the [documentation](https://lodash.com/docs#matchesProperty) or [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash.matchesproperty) for more details.
+See the [documentation](https://lodash.com/docs#matchesProperty) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.matchesproperty) for more details.
diff --git a/lodash.matchesproperty/index.js b/lodash.matchesproperty/index.js
index 3d3d67991..c1ed2ed6f 100644
--- a/lodash.matchesproperty/index.js
+++ b/lodash.matchesproperty/index.js
@@ -1,23 +1,29 @@
 /**
- * lodash 4.4.1 (Custom Build) <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
  * Copyright jQuery Foundation and other contributors <https://jquery.org/>
  * Released under MIT license <https://lodash.com/license>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var Stack = require('lodash._stack'),
-    baseClone = require('lodash._baseclone'),
+var baseClone = require('lodash._baseclone'),
     keys = require('lodash.keys'),
     root = require('lodash._root'),
     stringToPath = require('lodash._stringtopath');
 
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
 /** Used to compose bitmasks for comparison styles. */
 var UNORDERED_COMPARE_FLAG = 1,
     PARTIAL_COMPARE_FLAG = 2;
 
 /** Used as references for various `Number` constants. */
-var MAX_SAFE_INTEGER = 9007199254740991;
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
 var argsTag = '[object Arguments]',
@@ -123,25 +129,11 @@ function isHostObject(value) {
 }
 
 /**
- * Checks if `value` is a valid array-like index.
- *
- * @private
- * @param {*} value The value to check.
- * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
- * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
- */
-function isIndex(value, length) {
-  value = (typeof value == 'number' || reIsUint.test(value)) ? +value : -1;
-  length = length == null ? MAX_SAFE_INTEGER : length;
-  return value > -1 && value % 1 == 0 && value < length;
-}
-
-/**
- * Converts `map` to an array.
+ * Converts `map` to its key-value pairs.
  *
  * @private
  * @param {Object} map The map to convert.
- * @returns {Array} Returns the converted array.
+ * @returns {Array} Returns the key-value pairs.
  */
 function mapToArray(map) {
   var index = -1,
@@ -154,11 +146,11 @@ function mapToArray(map) {
 }
 
 /**
- * Converts `set` to an array.
+ * Converts `set` to an array of its values.
  *
  * @private
  * @param {Object} set The set to convert.
- * @returns {Array} Returns the converted array.
+ * @returns {Array} Returns the values.
  */
 function setToArray(set) {
   var index = -1,
@@ -171,7 +163,8 @@ function setToArray(set) {
 }
 
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
 
 /** Used to resolve the decompiled source of functions. */
 var funcToString = Function.prototype.toString;
@@ -195,7 +188,8 @@ var reIsNative = RegExp('^' +
 /** Built-in value references. */
 var Symbol = root.Symbol,
     Uint8Array = root.Uint8Array,
-    propertyIsEnumerable = objectProto.propertyIsEnumerable;
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
 var nativeGetPrototype = Object.getPrototypeOf;
@@ -205,7 +199,8 @@ var DataView = getNative(root, 'DataView'),
     Map = getNative(root, 'Map'),
     Promise = getNative(root, 'Promise'),
     Set = getNative(root, 'Set'),
-    WeakMap = getNative(root, 'WeakMap');
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
 
 /** Used to detect maps, sets, and weakmaps. */
 var dataViewCtorString = toSource(DataView),
@@ -218,6 +213,465 @@ var dataViewCtorString = toSource(DataView),
 var symbolProto = Symbol ? Symbol.prototype : undefined,
     symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;
 
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache && cache.__data__.length == LARGE_ARRAY_SIZE) {
+    cache = this.__data__ = new MapCache(cache.__data__);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
 /**
  * The base implementation of `_.get` without support for default values.
  *
@@ -233,7 +687,7 @@ function baseGet(object, path) {
       length = path.length;
 
   while (object != null && index < length) {
-    object = object[path[index++]];
+    object = object[toKey(path[index++])];
   }
   return (index && index == length) ? object : undefined;
 }
@@ -355,11 +809,11 @@ function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
  * @private
  * @param {string} path The path of the property to get.
  * @param {*} srcValue The value to match.
- * @returns {Function} Returns the new function.
+ * @returns {Function} Returns the new spec function.
  */
 function baseMatchesProperty(path, srcValue) {
   if (isKey(path) && isStrictComparable(srcValue)) {
-    return matchesStrictComparable(path, srcValue);
+    return matchesStrictComparable(toKey(path), srcValue);
   }
   return function(object) {
     var objValue = get(object, path);
@@ -374,7 +828,7 @@ function baseMatchesProperty(path, srcValue) {
  *
  * @private
  * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new function.
+ * @returns {Function} Returns the new accessor function.
  */
 function baseProperty(key) {
   return function(object) {
@@ -408,9 +862,7 @@ function castPath(value) {
  * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
  */
 function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
-  var index = -1,
-      isPartial = bitmask & PARTIAL_COMPARE_FLAG,
-      isUnordered = bitmask & UNORDERED_COMPARE_FLAG,
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
       arrLength = array.length,
       othLength = other.length;
 
@@ -422,7 +874,10 @@ function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
   if (stacked) {
     return stacked == other;
   }
-  var result = true;
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
   stack.set(array, other);
 
   // Ignore non-index properties.
@@ -443,10 +898,12 @@ function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
       break;
     }
     // Recursively compare arrays (susceptible to call stack limits).
-    if (isUnordered) {
-      if (!arraySome(other, function(othValue) {
-            return arrValue === othValue ||
-              equalFunc(arrValue, othValue, customizer, bitmask, stack);
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
           })) {
         result = false;
         break;
@@ -637,6 +1094,21 @@ function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
  */
 var getLength = baseProperty('length');
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
 /**
  * Gets the native function at `key` of `object`.
  *
@@ -714,7 +1186,7 @@ function hasPath(object, path, hasFunc) {
       length = path.length;
 
   while (++index < length) {
-    var key = path[index];
+    var key = toKey(path[index]);
     if (!(result = object != null && hasFunc(object, key))) {
       break;
     }
@@ -728,6 +1200,21 @@ function hasPath(object, path, hasFunc) {
     (isArray(object) || isString(object) || isArguments(object));
 }
 
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
 /**
  * Checks if `value` is a property name and not a property path.
  *
@@ -737,13 +1224,30 @@ function hasPath(object, path, hasFunc) {
  * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
  */
 function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
   var type = typeof value;
-  if (type == 'number' || type == 'symbol') {
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
     return true;
   }
-  return !isArray(value) &&
-    (isSymbol(value) || reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
-      (object != null && value in Object(object)));
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
 }
 
 /**
@@ -765,7 +1269,7 @@ function isStrictComparable(value) {
  * @private
  * @param {string} key The key of the property to get.
  * @param {*} srcValue The value to match.
- * @returns {Function} Returns the new function.
+ * @returns {Function} Returns the new spec function.
  */
 function matchesStrictComparable(key, srcValue) {
   return function(object) {
@@ -777,6 +1281,21 @@ function matchesStrictComparable(key, srcValue) {
   };
 }
 
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Converts `func` to its source code.
  *
@@ -796,6 +1315,42 @@ function toSource(func) {
   return '';
 }
 
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'user': 'fred' };
+ * var other = { 'user': 'fred' };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
 /**
  * Checks if `value` is likely an `arguments` object.
  *
@@ -1189,7 +1744,7 @@ function hasIn(object, path) {
  * @category Util
  * @param {Array|string} path The path of the property to get.
  * @param {*} srcValue The value to match.
- * @returns {Function} Returns the new function.
+ * @returns {Function} Returns the new spec function.
  * @example
  *
  * var users = [
diff --git a/lodash.matchesproperty/package.json b/lodash.matchesproperty/package.json
index 596b1885a..af324ca41 100644
--- a/lodash.matchesproperty/package.json
+++ b/lodash.matchesproperty/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.matchesproperty",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The lodash method `_.matchesProperty` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -17,8 +17,7 @@
   "dependencies": {
     "lodash._baseclone": "~4.5.0",
     "lodash._root": "~3.0.0",
-    "lodash._stack": "~4.1.0",
-    "lodash._stringtopath": "~4.7.0",
+    "lodash._stringtopath": "~4.8.0",
     "lodash.keys": "^4.0.0"
   }
 }
diff --git a/lodash.maxby/README.md b/lodash.maxby/README.md
index 13faadf2f..c5678f303 100644
--- a/lodash.maxby/README.md
+++ b/lodash.maxby/README.md
@@ -1,4 +1,4 @@
-# lodash.maxby v4.4.0
+# lodash.maxby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.maxBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var maxBy = require('lodash.maxby');
 ```
 
-See the [documentation](https://lodash.com/docs#maxBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.maxby) for more details.
+See the [documentation](https://lodash.com/docs#maxBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.maxby) for more details.
diff --git a/lodash.maxby/index.js b/lodash.maxby/index.js
index a9bcff6da..cf5eebcc0 100644
--- a/lodash.maxby/index.js
+++ b/lodash.maxby/index.js
@@ -6,13 +6,285 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
-var symbolTag = '[object Symbol]';
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
 
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
@@ -21,6 +293,506 @@ var objectProto = Object.prototype;
  */
 var objectToString = objectProto.toString;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
 /**
  * The base implementation of methods like `_.max` and `_.min` which accepts a
  * `comparator` to determine the extremum value.
@@ -51,7 +823,38 @@ function baseExtremum(array, iteratee, comparator) {
 }
 
 /**
- * The base implementation of `_.gt` which doesn't coerce arguments to numbers.
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.gt` which doesn't coerce arguments.
  *
  * @private
  * @param {*} value The value to compare.
@@ -63,6 +866,1153 @@ function baseGt(value, other) {
   return value > other;
 }
 
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
 /**
  * Checks if `value` is object-like. A value is object-like if it's not `null`
  * and has a `typeof` result of "object".
@@ -91,6 +2041,28 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
 /**
  * Checks if `value` is classified as a `Symbol` primitive or object.
  *
@@ -99,8 +2071,7 @@ function isObjectLike(value) {
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  * @example
  *
  * _.isSymbol(Symbol.iterator);
@@ -114,6 +2085,204 @@ function isSymbol(value) {
     (isObjectLike(value) && objectToString.call(value) == symbolTag);
 }
 
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 /**
  * This method is like `_.max` except that it accepts `iteratee` which is
  * invoked for each element in `array` to generate the criterion by which
@@ -124,8 +2293,7 @@ function isSymbol(value) {
  * @since 4.0.0
  * @category Math
  * @param {Array} array The array to iterate over.
- * @param {Array|Function|Object|string} [iteratee=_.identity]
- *  The iteratee invoked per element.
+ * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  * @returns {*} Returns the maximum value.
  * @example
  *
@@ -140,7 +2308,7 @@ function isSymbol(value) {
  */
 function maxBy(array, iteratee) {
   return (array && array.length)
-    ? baseExtremum(array, baseIteratee(iteratee), baseGt)
+    ? baseExtremum(array, baseIteratee(iteratee, 2), baseGt)
     : undefined;
 }
 
diff --git a/lodash.maxby/package.json b/lodash.maxby/package.json
index fdde700d6..7f27ffbca 100644
--- a/lodash.maxby/package.json
+++ b/lodash.maxby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.maxby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.maxBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,8 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.merge/README.md b/lodash.merge/README.md
index 8be8fb925..ada29a081 100644
--- a/lodash.merge/README.md
+++ b/lodash.merge/README.md
@@ -1,4 +1,4 @@
-# lodash.merge v4.4.0
+# lodash.merge v4.5.0
 
 The [lodash](https://lodash.com/) method `_.merge` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var merge = require('lodash.merge');
 ```
 
-See the [documentation](https://lodash.com/docs#merge) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.merge) for more details.
+See the [documentation](https://lodash.com/docs#merge) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.merge) for more details.
diff --git a/lodash.merge/index.js b/lodash.merge/index.js
index 1abc340aa..e2e6f4554 100644
--- a/lodash.merge/index.js
+++ b/lodash.merge/index.js
@@ -6,11 +6,6 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseClone = require('lodash._baseclone'),
-    isPlainObject = require('lodash.isplainobject'),
-    keysIn = require('lodash.keysin'),
-    rest = require('lodash.rest'),
-    root = require('lodash._root');
 
 /** Used as the size to enable large array optimizations. */
 var LARGE_ARRAY_SIZE = 200;
@@ -32,9 +27,11 @@ var argsTag = '[object Arguments]',
     mapTag = '[object Map]',
     numberTag = '[object Number]',
     objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
     regexpTag = '[object RegExp]',
     setTag = '[object Set]',
     stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
     weakMapTag = '[object WeakMap]';
 
 var arrayBufferTag = '[object ArrayBuffer]',
@@ -55,6 +52,9 @@ var arrayBufferTag = '[object ArrayBuffer]',
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
+/** Used to match `RegExp` flags from their coerced string values. */
+var reFlags = /\w*$/;
+
 /** Used to detect host constructors (Safari). */
 var reIsHostCtor = /^\[object .+?Constructor\]$/;
 
@@ -77,18 +77,113 @@ typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
 typedArrayTags[setTag] = typedArrayTags[stringTag] =
 typedArrayTags[weakMapTag] = false;
 
+/** Used to identify `toStringTag` values supported by `_.clone`. */
+var cloneableTags = {};
+cloneableTags[argsTag] = cloneableTags[arrayTag] =
+cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
+cloneableTags[boolTag] = cloneableTags[dateTag] =
+cloneableTags[float32Tag] = cloneableTags[float64Tag] =
+cloneableTags[int8Tag] = cloneableTags[int16Tag] =
+cloneableTags[int32Tag] = cloneableTags[mapTag] =
+cloneableTags[numberTag] = cloneableTags[objectTag] =
+cloneableTags[regexpTag] = cloneableTags[setTag] =
+cloneableTags[stringTag] = cloneableTags[symbolTag] =
+cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
+cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
+cloneableTags[errorTag] = cloneableTags[funcTag] =
+cloneableTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * Adds the key-value `pair` to `map`.
+ *
+ * @private
+ * @param {Object} map The map to modify.
+ * @param {Array} pair The key-value pair to add.
+ * @returns {Object} Returns `map`.
+ */
+function addMapEntry(map, pair) {
+  // Don't return `map.set` because it's not chainable in IE 11.
+  map.set(pair[0], pair[1]);
+  return map;
+}
+
+/**
+ * Adds `value` to `set`.
+ *
+ * @private
+ * @param {Object} set The set to modify.
+ * @param {*} value The value to add.
+ * @returns {Object} Returns `set`.
+ */
+function addSetEntry(set, value) {
+  // Don't return `set.add` because it's not chainable in IE 11.
+  set.add(value);
+  return set;
+}
+
+/**
+ * A faster alternative to `Function#apply`, this function invokes `func`
+ * with the `this` binding of `thisArg` and the arguments of `args`.
+ *
+ * @private
+ * @param {Function} func The function to invoke.
+ * @param {*} thisArg The `this` binding of `func`.
+ * @param {Array} args The arguments to invoke `func` with.
+ * @returns {*} Returns the result of `func`.
+ */
+function apply(func, thisArg, args) {
+  switch (args.length) {
+    case 0: return func.call(thisArg);
+    case 1: return func.call(thisArg, args[0]);
+    case 2: return func.call(thisArg, args[0], args[1]);
+    case 3: return func.call(thisArg, args[0], args[1], args[2]);
+  }
+  return func.apply(thisArg, args);
+}
+
 /**
  * A specialized version of `_.forEach` for arrays without support for
  * iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @returns {Array} Returns `array`.
  */
 function arrayEach(array, iteratee) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     if (iteratee(array[index], index, array) === false) {
@@ -98,6 +193,107 @@ function arrayEach(array, iteratee) {
   return array;
 }
 
+/**
+ * Appends the elements of `values` to `array`.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {Array} values The values to append.
+ * @returns {Array} Returns `array`.
+ */
+function arrayPush(array, values) {
+  var index = -1,
+      length = values.length,
+      offset = array.length;
+
+  while (++index < length) {
+    array[offset + index] = values[index];
+  }
+  return array;
+}
+
+/**
+ * A specialized version of `_.reduce` for arrays without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {*} [accumulator] The initial value.
+ * @param {boolean} [initAccum] Specify using the first element of `array` as
+ *  the initial value.
+ * @returns {*} Returns the accumulated value.
+ */
+function arrayReduce(array, iteratee, accumulator, initAccum) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  if (initAccum && length) {
+    accumulator = array[++index];
+  }
+  while (++index < length) {
+    accumulator = iteratee(accumulator, array[index], index, array);
+  }
+  return accumulator;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
 /**
  * Checks if `value` is a host object in IE < 9.
  *
@@ -117,16 +313,93 @@ function isHostObject(value) {
   return result;
 }
 
+/**
+ * Converts `iterator` to an array.
+ *
+ * @private
+ * @param {Object} iterator The iterator to convert.
+ * @returns {Array} Returns the converted array.
+ */
+function iteratorToArray(iterator) {
+  var data,
+      result = [];
+
+  while (!(data = iterator.next()).done) {
+    result.push(data.value);
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
     objectProto = Object.prototype;
 
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
 /** Used to resolve the decompiled source of functions. */
 var funcToString = Function.prototype.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
+/** Used to infer the `Object` constructor. */
+var objectCtorString = funcToString.call(Object);
+
 /**
  * Used to resolve the
  * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
@@ -141,13 +414,41 @@ var reIsNative = RegExp('^' +
 );
 
 /** Built-in value references. */
-var propertyIsEnumerable = objectProto.propertyIsEnumerable,
+var Buffer = moduleExports ? root.Buffer : undefined,
+    Reflect = root.Reflect,
+    Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    enumerate = Reflect ? Reflect.enumerate : undefined,
+    objectCreate = Object.create,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
     splice = arrayProto.splice;
 
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeGetSymbols = Object.getOwnPropertySymbols,
+    nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
+    nativeKeys = Object.keys,
+    nativeMax = Math.max;
+
 /* Built-in method references that are verified to be native. */
-var Map = getNative(root, 'Map'),
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
     nativeCreate = getNative(Object, 'create');
 
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;
+
 /**
  * Creates a hash object.
  *
@@ -525,8 +826,13 @@ function stackHas(key) {
  */
 function stackSet(key, value) {
   var cache = this.__data__;
-  if (cache instanceof ListCache && cache.__data__.length == LARGE_ARRAY_SIZE) {
-    cache = this.__data__ = new MapCache(cache.__data__);
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
   }
   cache.set(key, value);
   return this;
@@ -591,6 +897,216 @@ function assocIndexOf(array, key) {
   return -1;
 }
 
+/**
+ * The base implementation of `_.assign` without support for multiple sources
+ * or `customizer` functions.
+ *
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @returns {Object} Returns `object`.
+ */
+function baseAssign(object, source) {
+  return object && copyObject(source, keys(source), object);
+}
+
+/**
+ * The base implementation of `_.clone` and `_.cloneDeep` which tracks
+ * traversed objects.
+ *
+ * @private
+ * @param {*} value The value to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @param {boolean} [isFull] Specify a clone including symbols.
+ * @param {Function} [customizer] The function to customize cloning.
+ * @param {string} [key] The key of `value`.
+ * @param {Object} [object] The parent object of `value`.
+ * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
+ * @returns {*} Returns the cloned value.
+ */
+function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
+  var result;
+  if (customizer) {
+    result = object ? customizer(value, key, object, stack) : customizer(value);
+  }
+  if (result !== undefined) {
+    return result;
+  }
+  if (!isObject(value)) {
+    return value;
+  }
+  var isArr = isArray(value);
+  if (isArr) {
+    result = initCloneArray(value);
+    if (!isDeep) {
+      return copyArray(value, result);
+    }
+  } else {
+    var tag = getTag(value),
+        isFunc = tag == funcTag || tag == genTag;
+
+    if (isBuffer(value)) {
+      return cloneBuffer(value, isDeep);
+    }
+    if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
+      if (isHostObject(value)) {
+        return object ? value : {};
+      }
+      result = initCloneObject(isFunc ? {} : value);
+      if (!isDeep) {
+        return copySymbols(value, baseAssign(result, value));
+      }
+    } else {
+      if (!cloneableTags[tag]) {
+        return object ? value : {};
+      }
+      result = initCloneByTag(value, tag, baseClone, isDeep);
+    }
+  }
+  // Check for circular references and return its corresponding clone.
+  stack || (stack = new Stack);
+  var stacked = stack.get(value);
+  if (stacked) {
+    return stacked;
+  }
+  stack.set(value, result);
+
+  if (!isArr) {
+    var props = isFull ? getAllKeys(value) : keys(value);
+  }
+  arrayEach(props || value, function(subValue, key) {
+    if (props) {
+      key = subValue;
+      subValue = value[key];
+    }
+    // Recursively populate clone (susceptible to call stack limits).
+    assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
+  });
+  if (!isFull) {
+    stack['delete'](value);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.create` without support for assigning
+ * properties to the created object.
+ *
+ * @private
+ * @param {Object} prototype The object to inherit from.
+ * @returns {Object} Returns the new object.
+ */
+function baseCreate(proto) {
+  return isObject(proto) ? objectCreate(proto) : {};
+}
+
+/**
+ * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
+ * `keysFunc` and `symbolsFunc` to get the enumerable property names and
+ * symbols of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @param {Function} symbolsFunc The function to get the symbols of `object`.
+ * @returns {Array} Returns the array of property names and symbols.
+ */
+function baseGetAllKeys(object, keysFunc, symbolsFunc) {
+  var result = keysFunc(object);
+  return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.keysIn` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+function baseKeysIn(object) {
+  object = object == null ? object : Object(object);
+
+  var result = [];
+  for (var key in object) {
+    result.push(key);
+  }
+  return result;
+}
+
+// Fallback for IE < 9 with es6-shim.
+if (enumerate && !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf')) {
+  baseKeysIn = function(object) {
+    return iteratorToArray(enumerate(object));
+  };
+}
+
 /**
  * The base implementation of `_.merge` without support for multiple sources.
  *
@@ -691,29 +1207,152 @@ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, sta
       isCommon = false;
     }
   }
-  stack.set(srcValue, newValue);
-
   if (isCommon) {
     // Recursively merge objects and arrays (susceptible to call stack limits).
+    stack.set(srcValue, newValue);
     mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
+    stack['delete'](srcValue);
   }
-  stack['delete'](srcValue);
   assignMergeValue(object, key, newValue);
 }
 
 /**
- * The base implementation of `_.property` without support for deep paths.
+ * The base implementation of `_.rest` which doesn't validate or coerce arguments.
  *
  * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @returns {Function} Returns the new function.
  */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
+function baseRest(func, start) {
+  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+  return function() {
+    var args = arguments,
+        index = -1,
+        length = nativeMax(args.length - start, 0),
+        array = Array(length);
+
+    while (++index < length) {
+      array[index] = args[start + index];
+    }
+    index = -1;
+    var otherArgs = Array(start + 1);
+    while (++index < start) {
+      otherArgs[index] = args[index];
+    }
+    otherArgs[start] = array;
+    return apply(func, this, otherArgs);
   };
 }
 
+/**
+ * Creates a clone of  `buffer`.
+ *
+ * @private
+ * @param {Buffer} buffer The buffer to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Buffer} Returns the cloned buffer.
+ */
+function cloneBuffer(buffer, isDeep) {
+  if (isDeep) {
+    return buffer.slice();
+  }
+  var result = new buffer.constructor(buffer.length);
+  buffer.copy(result);
+  return result;
+}
+
+/**
+ * Creates a clone of `arrayBuffer`.
+ *
+ * @private
+ * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
+ * @returns {ArrayBuffer} Returns the cloned array buffer.
+ */
+function cloneArrayBuffer(arrayBuffer) {
+  var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
+  new Uint8Array(result).set(new Uint8Array(arrayBuffer));
+  return result;
+}
+
+/**
+ * Creates a clone of `dataView`.
+ *
+ * @private
+ * @param {Object} dataView The data view to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned data view.
+ */
+function cloneDataView(dataView, isDeep) {
+  var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
+  return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
+}
+
+/**
+ * Creates a clone of `map`.
+ *
+ * @private
+ * @param {Object} map The map to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned map.
+ */
+function cloneMap(map, isDeep, cloneFunc) {
+  var array = isDeep ? cloneFunc(mapToArray(map), true) : mapToArray(map);
+  return arrayReduce(array, addMapEntry, new map.constructor);
+}
+
+/**
+ * Creates a clone of `regexp`.
+ *
+ * @private
+ * @param {Object} regexp The regexp to clone.
+ * @returns {Object} Returns the cloned regexp.
+ */
+function cloneRegExp(regexp) {
+  var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
+  result.lastIndex = regexp.lastIndex;
+  return result;
+}
+
+/**
+ * Creates a clone of `set`.
+ *
+ * @private
+ * @param {Object} set The set to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned set.
+ */
+function cloneSet(set, isDeep, cloneFunc) {
+  var array = isDeep ? cloneFunc(setToArray(set), true) : setToArray(set);
+  return arrayReduce(array, addSetEntry, new set.constructor);
+}
+
+/**
+ * Creates a clone of the `symbol` object.
+ *
+ * @private
+ * @param {Object} symbol The symbol object to clone.
+ * @returns {Object} Returns the cloned symbol object.
+ */
+function cloneSymbol(symbol) {
+  return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
+}
+
+/**
+ * Creates a clone of `typedArray`.
+ *
+ * @private
+ * @param {Object} typedArray The typed array to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned typed array.
+ */
+function cloneTypedArray(typedArray, isDeep) {
+  var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
+  return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
+}
+
 /**
  * Copies the values of `source` to `array`.
  *
@@ -754,13 +1393,25 @@ function copyObject(source, props, object, customizer) {
 
     var newValue = customizer
       ? customizer(object[key], source[key], key, object, source)
-      : source[key];
+      : undefined;
 
-    assignValue(object, key, newValue);
+    assignValue(object, key, newValue === undefined ? source[key] : newValue);
   }
   return object;
 }
 
+/**
+ * Copies own symbol properties of `source` to `object`.
+ *
+ * @private
+ * @param {Object} source The object to copy symbols from.
+ * @param {Object} [object={}] The object to copy symbols to.
+ * @returns {Object} Returns `object`.
+ */
+function copySymbols(source, object) {
+  return copyObject(source, getSymbols(source), object);
+}
+
 /**
  * Creates a function like `_.assign`.
  *
@@ -769,7 +1420,7 @@ function copyObject(source, props, object, customizer) {
  * @returns {Function} Returns the new assigner function.
  */
 function createAssigner(assigner) {
-  return rest(function(object, sources) {
+  return baseRest(function(object, sources) {
     var index = -1,
         length = sources.length,
         customizer = length > 1 ? sources[length - 1] : undefined,
@@ -794,6 +1445,17 @@ function createAssigner(assigner) {
   });
 }
 
+/**
+ * Creates an array of own enumerable property names and symbols of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names and symbols.
+ */
+function getAllKeys(object) {
+  return baseGetAllKeys(object, keys, getSymbols);
+}
+
 /**
  * Gets the "length" property value of `object`.
  *
@@ -831,8 +1493,158 @@ function getMapData(map, key) {
  * @returns {*} Returns the function if it's native, else `undefined`.
  */
 function getNative(object, key) {
-  var value = object[key];
-  return isNative(value) ? value : undefined;
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Creates an array of the own enumerable symbol properties of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of symbols.
+ */
+var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArray;
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Initializes an array clone.
+ *
+ * @private
+ * @param {Array} array The array to clone.
+ * @returns {Array} Returns the initialized clone.
+ */
+function initCloneArray(array) {
+  var length = array.length,
+      result = array.constructor(length);
+
+  // Add properties assigned by `RegExp#exec`.
+  if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
+    result.index = array.index;
+    result.input = array.input;
+  }
+  return result;
+}
+
+/**
+ * Initializes an object clone.
+ *
+ * @private
+ * @param {Object} object The object to clone.
+ * @returns {Object} Returns the initialized clone.
+ */
+function initCloneObject(object) {
+  return (typeof object.constructor == 'function' && !isPrototype(object))
+    ? baseCreate(getPrototype(object))
+    : {};
+}
+
+/**
+ * Initializes an object clone based on its `toStringTag`.
+ *
+ * **Note:** This function only supports cloning values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to clone.
+ * @param {string} tag The `toStringTag` of the object to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the initialized clone.
+ */
+function initCloneByTag(object, tag, cloneFunc, isDeep) {
+  var Ctor = object.constructor;
+  switch (tag) {
+    case arrayBufferTag:
+      return cloneArrayBuffer(object);
+
+    case boolTag:
+    case dateTag:
+      return new Ctor(+object);
+
+    case dataViewTag:
+      return cloneDataView(object, isDeep);
+
+    case float32Tag: case float64Tag:
+    case int8Tag: case int16Tag: case int32Tag:
+    case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
+      return cloneTypedArray(object, isDeep);
+
+    case mapTag:
+      return cloneMap(object, isDeep, cloneFunc);
+
+    case numberTag:
+    case stringTag:
+      return new Ctor(object);
+
+    case regexpTag:
+      return cloneRegExp(object);
+
+    case setTag:
+      return cloneSet(object, isDeep, cloneFunc);
+
+    case symbolTag:
+      return cloneSymbol(object);
+  }
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
 }
 
 /**
@@ -888,6 +1700,31 @@ function isKeyable(value) {
     : (value === null);
 }
 
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
 /**
  * Converts `func` to its source code.
  *
@@ -921,8 +1758,8 @@ function toSource(func) {
  * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  * @example
  *
- * var object = { 'user': 'fred' };
- * var other = { 'user': 'fred' };
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
  *
  * _.eq(object, object);
  * // => true
@@ -951,7 +1788,7 @@ function eq(value, other) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
  *  else `false`.
  * @example
  *
@@ -973,11 +1810,9 @@ function isArguments(value) {
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -1052,6 +1887,25 @@ function isArrayLikeObject(value) {
   return isObjectLike(value) && isArrayLike(value);
 }
 
+/**
+ * Checks if `value` is a buffer.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.3.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
+ * @example
+ *
+ * _.isBuffer(new Buffer(2));
+ * // => true
+ *
+ * _.isBuffer(new Uint8Array(2));
+ * // => false
+ */
+var isBuffer = nativeIsBuffer || stubFalse;
+
 /**
  * Checks if `value` is classified as a `Function` object.
  *
@@ -1060,8 +1914,7 @@ function isArrayLikeObject(value) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -1169,29 +2022,68 @@ function isObjectLike(value) {
 }
 
 /**
- * Checks if `value` is a native function.
+ * Checks if `value` is a plain object, that is, an object created by the
+ * `Object` constructor or one with a `[[Prototype]]` of `null`.
  *
  * @static
  * @memberOf _
- * @since 3.0.0
+ * @since 0.8.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a native function,
+ * @returns {boolean} Returns `true` if `value` is a plain object,
  *  else `false`.
  * @example
  *
- * _.isNative(Array.prototype.push);
+ * function Foo() {
+ *   this.a = 1;
+ * }
+ *
+ * _.isPlainObject(new Foo);
+ * // => false
+ *
+ * _.isPlainObject([1, 2, 3]);
+ * // => false
+ *
+ * _.isPlainObject({ 'x': 0, 'y': 0 });
  * // => true
  *
- * _.isNative(_);
- * // => false
+ * _.isPlainObject(Object.create(null));
+ * // => true
  */
-function isNative(value) {
-  if (!isObject(value)) {
+function isPlainObject(value) {
+  if (!isObjectLike(value) ||
+      objectToString.call(value) != objectTag || isHostObject(value)) {
     return false;
   }
-  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
-  return pattern.test(toSource(value));
+  var proto = getPrototype(value);
+  if (proto === null) {
+    return true;
+  }
+  var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
+  return (typeof Ctor == 'function' &&
+    Ctor instanceof Ctor && funcToString.call(Ctor) == objectCtorString);
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
 }
 
 /**
@@ -1202,8 +2094,7 @@ function isNative(value) {
  * @since 3.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
  * @example
  *
  * _.isTypedArray(new Uint8Array);
@@ -1212,10 +2103,7 @@ function isNative(value) {
  * _.isTypedArray([]);
  * // => false
  */
-function isTypedArray(value) {
-  return isObjectLike(value) &&
-    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
-}
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
 
 /**
  * Converts `value` to a plain object flattening inherited enumerable string
@@ -1245,6 +2133,97 @@ function toPlainObject(value) {
   return copyObject(value, keysIn(value));
 }
 
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * Creates an array of the own and inherited enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keysIn(new Foo);
+ * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
+ */
+function keysIn(object) {
+  var index = -1,
+      isProto = isPrototype(object),
+      props = baseKeysIn(object),
+      propsLength = props.length,
+      indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  while (++index < propsLength) {
+    var key = props[index];
+    if (!(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * This method is like `_.assign` except that it recursively merges own and
  * inherited enumerable string keyed properties of source objects into the
@@ -1265,19 +2244,58 @@ function toPlainObject(value) {
  * @returns {Object} Returns `object`.
  * @example
  *
- * var users = {
- *   'data': [{ 'user': 'barney' }, { 'user': 'fred' }]
+ * var object = {
+ *   'a': [{ 'b': 2 }, { 'd': 4 }]
  * };
  *
- * var ages = {
- *   'data': [{ 'age': 36 }, { 'age': 40 }]
+ * var other = {
+ *   'a': [{ 'c': 3 }, { 'e': 5 }]
  * };
  *
- * _.merge(users, ages);
- * // => { 'data': [{ 'user': 'barney', 'age': 36 }, { 'user': 'fred', 'age': 40 }] }
+ * _.merge(object, other);
+ * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
  */
 var merge = createAssigner(function(object, source, srcIndex) {
   baseMerge(object, source, srcIndex);
 });
 
+/**
+ * This method returns a new empty array.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {Array} Returns the new empty array.
+ * @example
+ *
+ * var arrays = _.times(2, _.stubArray);
+ *
+ * console.log(arrays);
+ * // => [[], []]
+ *
+ * console.log(arrays[0] === arrays[1]);
+ * // => false
+ */
+function stubArray() {
+  return [];
+}
+
+/**
+ * This method returns `false`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {boolean} Returns `false`.
+ * @example
+ *
+ * _.times(2, _.stubFalse);
+ * // => [false, false]
+ */
+function stubFalse() {
+  return false;
+}
+
 module.exports = merge;
diff --git a/lodash.merge/package.json b/lodash.merge/package.json
index 5c6b85ba1..6c0d6eda5 100644
--- a/lodash.merge/package.json
+++ b/lodash.merge/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.merge",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.merge` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,12 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseclone": "~4.5.0",
-    "lodash._root": "~3.0.0",
-    "lodash.isplainobject": "^4.0.0",
-    "lodash.keysin": "^4.0.0",
-    "lodash.rest": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.mergewith/README.md b/lodash.mergewith/README.md
index ca9758ee8..f1fea3d3a 100644
--- a/lodash.mergewith/README.md
+++ b/lodash.mergewith/README.md
@@ -1,4 +1,4 @@
-# lodash.mergewith v4.4.0
+# lodash.mergewith v4.5.0
 
 The [lodash](https://lodash.com/) method `_.mergeWith` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var mergeWith = require('lodash.mergewith');
 ```
 
-See the [documentation](https://lodash.com/docs#mergeWith) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.mergewith) for more details.
+See the [documentation](https://lodash.com/docs#mergeWith) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.mergewith) for more details.
diff --git a/lodash.mergewith/index.js b/lodash.mergewith/index.js
index e74f9467e..8b33e0c01 100644
--- a/lodash.mergewith/index.js
+++ b/lodash.mergewith/index.js
@@ -6,11 +6,6 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseClone = require('lodash._baseclone'),
-    isPlainObject = require('lodash.isplainobject'),
-    keysIn = require('lodash.keysin'),
-    rest = require('lodash.rest'),
-    root = require('lodash._root');
 
 /** Used as the size to enable large array optimizations. */
 var LARGE_ARRAY_SIZE = 200;
@@ -32,9 +27,11 @@ var argsTag = '[object Arguments]',
     mapTag = '[object Map]',
     numberTag = '[object Number]',
     objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
     regexpTag = '[object RegExp]',
     setTag = '[object Set]',
     stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
     weakMapTag = '[object WeakMap]';
 
 var arrayBufferTag = '[object ArrayBuffer]',
@@ -55,6 +52,9 @@ var arrayBufferTag = '[object ArrayBuffer]',
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
+/** Used to match `RegExp` flags from their coerced string values. */
+var reFlags = /\w*$/;
+
 /** Used to detect host constructors (Safari). */
 var reIsHostCtor = /^\[object .+?Constructor\]$/;
 
@@ -77,18 +77,113 @@ typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
 typedArrayTags[setTag] = typedArrayTags[stringTag] =
 typedArrayTags[weakMapTag] = false;
 
+/** Used to identify `toStringTag` values supported by `_.clone`. */
+var cloneableTags = {};
+cloneableTags[argsTag] = cloneableTags[arrayTag] =
+cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
+cloneableTags[boolTag] = cloneableTags[dateTag] =
+cloneableTags[float32Tag] = cloneableTags[float64Tag] =
+cloneableTags[int8Tag] = cloneableTags[int16Tag] =
+cloneableTags[int32Tag] = cloneableTags[mapTag] =
+cloneableTags[numberTag] = cloneableTags[objectTag] =
+cloneableTags[regexpTag] = cloneableTags[setTag] =
+cloneableTags[stringTag] = cloneableTags[symbolTag] =
+cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
+cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
+cloneableTags[errorTag] = cloneableTags[funcTag] =
+cloneableTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * Adds the key-value `pair` to `map`.
+ *
+ * @private
+ * @param {Object} map The map to modify.
+ * @param {Array} pair The key-value pair to add.
+ * @returns {Object} Returns `map`.
+ */
+function addMapEntry(map, pair) {
+  // Don't return `map.set` because it's not chainable in IE 11.
+  map.set(pair[0], pair[1]);
+  return map;
+}
+
+/**
+ * Adds `value` to `set`.
+ *
+ * @private
+ * @param {Object} set The set to modify.
+ * @param {*} value The value to add.
+ * @returns {Object} Returns `set`.
+ */
+function addSetEntry(set, value) {
+  // Don't return `set.add` because it's not chainable in IE 11.
+  set.add(value);
+  return set;
+}
+
+/**
+ * A faster alternative to `Function#apply`, this function invokes `func`
+ * with the `this` binding of `thisArg` and the arguments of `args`.
+ *
+ * @private
+ * @param {Function} func The function to invoke.
+ * @param {*} thisArg The `this` binding of `func`.
+ * @param {Array} args The arguments to invoke `func` with.
+ * @returns {*} Returns the result of `func`.
+ */
+function apply(func, thisArg, args) {
+  switch (args.length) {
+    case 0: return func.call(thisArg);
+    case 1: return func.call(thisArg, args[0]);
+    case 2: return func.call(thisArg, args[0], args[1]);
+    case 3: return func.call(thisArg, args[0], args[1], args[2]);
+  }
+  return func.apply(thisArg, args);
+}
+
 /**
  * A specialized version of `_.forEach` for arrays without support for
  * iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @returns {Array} Returns `array`.
  */
 function arrayEach(array, iteratee) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     if (iteratee(array[index], index, array) === false) {
@@ -98,6 +193,107 @@ function arrayEach(array, iteratee) {
   return array;
 }
 
+/**
+ * Appends the elements of `values` to `array`.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {Array} values The values to append.
+ * @returns {Array} Returns `array`.
+ */
+function arrayPush(array, values) {
+  var index = -1,
+      length = values.length,
+      offset = array.length;
+
+  while (++index < length) {
+    array[offset + index] = values[index];
+  }
+  return array;
+}
+
+/**
+ * A specialized version of `_.reduce` for arrays without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {*} [accumulator] The initial value.
+ * @param {boolean} [initAccum] Specify using the first element of `array` as
+ *  the initial value.
+ * @returns {*} Returns the accumulated value.
+ */
+function arrayReduce(array, iteratee, accumulator, initAccum) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  if (initAccum && length) {
+    accumulator = array[++index];
+  }
+  while (++index < length) {
+    accumulator = iteratee(accumulator, array[index], index, array);
+  }
+  return accumulator;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
 /**
  * Checks if `value` is a host object in IE < 9.
  *
@@ -117,16 +313,93 @@ function isHostObject(value) {
   return result;
 }
 
+/**
+ * Converts `iterator` to an array.
+ *
+ * @private
+ * @param {Object} iterator The iterator to convert.
+ * @returns {Array} Returns the converted array.
+ */
+function iteratorToArray(iterator) {
+  var data,
+      result = [];
+
+  while (!(data = iterator.next()).done) {
+    result.push(data.value);
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
     objectProto = Object.prototype;
 
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
 /** Used to resolve the decompiled source of functions. */
 var funcToString = Function.prototype.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
+/** Used to infer the `Object` constructor. */
+var objectCtorString = funcToString.call(Object);
+
 /**
  * Used to resolve the
  * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
@@ -141,13 +414,41 @@ var reIsNative = RegExp('^' +
 );
 
 /** Built-in value references. */
-var propertyIsEnumerable = objectProto.propertyIsEnumerable,
+var Buffer = moduleExports ? root.Buffer : undefined,
+    Reflect = root.Reflect,
+    Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    enumerate = Reflect ? Reflect.enumerate : undefined,
+    objectCreate = Object.create,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
     splice = arrayProto.splice;
 
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeGetSymbols = Object.getOwnPropertySymbols,
+    nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
+    nativeKeys = Object.keys,
+    nativeMax = Math.max;
+
 /* Built-in method references that are verified to be native. */
-var Map = getNative(root, 'Map'),
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
     nativeCreate = getNative(Object, 'create');
 
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;
+
 /**
  * Creates a hash object.
  *
@@ -525,8 +826,13 @@ function stackHas(key) {
  */
 function stackSet(key, value) {
   var cache = this.__data__;
-  if (cache instanceof ListCache && cache.__data__.length == LARGE_ARRAY_SIZE) {
-    cache = this.__data__ = new MapCache(cache.__data__);
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
   }
   cache.set(key, value);
   return this;
@@ -591,6 +897,216 @@ function assocIndexOf(array, key) {
   return -1;
 }
 
+/**
+ * The base implementation of `_.assign` without support for multiple sources
+ * or `customizer` functions.
+ *
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @returns {Object} Returns `object`.
+ */
+function baseAssign(object, source) {
+  return object && copyObject(source, keys(source), object);
+}
+
+/**
+ * The base implementation of `_.clone` and `_.cloneDeep` which tracks
+ * traversed objects.
+ *
+ * @private
+ * @param {*} value The value to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @param {boolean} [isFull] Specify a clone including symbols.
+ * @param {Function} [customizer] The function to customize cloning.
+ * @param {string} [key] The key of `value`.
+ * @param {Object} [object] The parent object of `value`.
+ * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
+ * @returns {*} Returns the cloned value.
+ */
+function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
+  var result;
+  if (customizer) {
+    result = object ? customizer(value, key, object, stack) : customizer(value);
+  }
+  if (result !== undefined) {
+    return result;
+  }
+  if (!isObject(value)) {
+    return value;
+  }
+  var isArr = isArray(value);
+  if (isArr) {
+    result = initCloneArray(value);
+    if (!isDeep) {
+      return copyArray(value, result);
+    }
+  } else {
+    var tag = getTag(value),
+        isFunc = tag == funcTag || tag == genTag;
+
+    if (isBuffer(value)) {
+      return cloneBuffer(value, isDeep);
+    }
+    if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
+      if (isHostObject(value)) {
+        return object ? value : {};
+      }
+      result = initCloneObject(isFunc ? {} : value);
+      if (!isDeep) {
+        return copySymbols(value, baseAssign(result, value));
+      }
+    } else {
+      if (!cloneableTags[tag]) {
+        return object ? value : {};
+      }
+      result = initCloneByTag(value, tag, baseClone, isDeep);
+    }
+  }
+  // Check for circular references and return its corresponding clone.
+  stack || (stack = new Stack);
+  var stacked = stack.get(value);
+  if (stacked) {
+    return stacked;
+  }
+  stack.set(value, result);
+
+  if (!isArr) {
+    var props = isFull ? getAllKeys(value) : keys(value);
+  }
+  arrayEach(props || value, function(subValue, key) {
+    if (props) {
+      key = subValue;
+      subValue = value[key];
+    }
+    // Recursively populate clone (susceptible to call stack limits).
+    assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
+  });
+  if (!isFull) {
+    stack['delete'](value);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.create` without support for assigning
+ * properties to the created object.
+ *
+ * @private
+ * @param {Object} prototype The object to inherit from.
+ * @returns {Object} Returns the new object.
+ */
+function baseCreate(proto) {
+  return isObject(proto) ? objectCreate(proto) : {};
+}
+
+/**
+ * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
+ * `keysFunc` and `symbolsFunc` to get the enumerable property names and
+ * symbols of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @param {Function} symbolsFunc The function to get the symbols of `object`.
+ * @returns {Array} Returns the array of property names and symbols.
+ */
+function baseGetAllKeys(object, keysFunc, symbolsFunc) {
+  var result = keysFunc(object);
+  return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.keysIn` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+function baseKeysIn(object) {
+  object = object == null ? object : Object(object);
+
+  var result = [];
+  for (var key in object) {
+    result.push(key);
+  }
+  return result;
+}
+
+// Fallback for IE < 9 with es6-shim.
+if (enumerate && !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf')) {
+  baseKeysIn = function(object) {
+    return iteratorToArray(enumerate(object));
+  };
+}
+
 /**
  * The base implementation of `_.merge` without support for multiple sources.
  *
@@ -691,29 +1207,152 @@ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, sta
       isCommon = false;
     }
   }
-  stack.set(srcValue, newValue);
-
   if (isCommon) {
     // Recursively merge objects and arrays (susceptible to call stack limits).
+    stack.set(srcValue, newValue);
     mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
+    stack['delete'](srcValue);
   }
-  stack['delete'](srcValue);
   assignMergeValue(object, key, newValue);
 }
 
 /**
- * The base implementation of `_.property` without support for deep paths.
+ * The base implementation of `_.rest` which doesn't validate or coerce arguments.
  *
  * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @returns {Function} Returns the new function.
  */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
+function baseRest(func, start) {
+  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+  return function() {
+    var args = arguments,
+        index = -1,
+        length = nativeMax(args.length - start, 0),
+        array = Array(length);
+
+    while (++index < length) {
+      array[index] = args[start + index];
+    }
+    index = -1;
+    var otherArgs = Array(start + 1);
+    while (++index < start) {
+      otherArgs[index] = args[index];
+    }
+    otherArgs[start] = array;
+    return apply(func, this, otherArgs);
   };
 }
 
+/**
+ * Creates a clone of  `buffer`.
+ *
+ * @private
+ * @param {Buffer} buffer The buffer to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Buffer} Returns the cloned buffer.
+ */
+function cloneBuffer(buffer, isDeep) {
+  if (isDeep) {
+    return buffer.slice();
+  }
+  var result = new buffer.constructor(buffer.length);
+  buffer.copy(result);
+  return result;
+}
+
+/**
+ * Creates a clone of `arrayBuffer`.
+ *
+ * @private
+ * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
+ * @returns {ArrayBuffer} Returns the cloned array buffer.
+ */
+function cloneArrayBuffer(arrayBuffer) {
+  var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
+  new Uint8Array(result).set(new Uint8Array(arrayBuffer));
+  return result;
+}
+
+/**
+ * Creates a clone of `dataView`.
+ *
+ * @private
+ * @param {Object} dataView The data view to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned data view.
+ */
+function cloneDataView(dataView, isDeep) {
+  var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
+  return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
+}
+
+/**
+ * Creates a clone of `map`.
+ *
+ * @private
+ * @param {Object} map The map to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned map.
+ */
+function cloneMap(map, isDeep, cloneFunc) {
+  var array = isDeep ? cloneFunc(mapToArray(map), true) : mapToArray(map);
+  return arrayReduce(array, addMapEntry, new map.constructor);
+}
+
+/**
+ * Creates a clone of `regexp`.
+ *
+ * @private
+ * @param {Object} regexp The regexp to clone.
+ * @returns {Object} Returns the cloned regexp.
+ */
+function cloneRegExp(regexp) {
+  var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
+  result.lastIndex = regexp.lastIndex;
+  return result;
+}
+
+/**
+ * Creates a clone of `set`.
+ *
+ * @private
+ * @param {Object} set The set to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned set.
+ */
+function cloneSet(set, isDeep, cloneFunc) {
+  var array = isDeep ? cloneFunc(setToArray(set), true) : setToArray(set);
+  return arrayReduce(array, addSetEntry, new set.constructor);
+}
+
+/**
+ * Creates a clone of the `symbol` object.
+ *
+ * @private
+ * @param {Object} symbol The symbol object to clone.
+ * @returns {Object} Returns the cloned symbol object.
+ */
+function cloneSymbol(symbol) {
+  return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
+}
+
+/**
+ * Creates a clone of `typedArray`.
+ *
+ * @private
+ * @param {Object} typedArray The typed array to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned typed array.
+ */
+function cloneTypedArray(typedArray, isDeep) {
+  var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
+  return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
+}
+
 /**
  * Copies the values of `source` to `array`.
  *
@@ -754,13 +1393,25 @@ function copyObject(source, props, object, customizer) {
 
     var newValue = customizer
       ? customizer(object[key], source[key], key, object, source)
-      : source[key];
+      : undefined;
 
-    assignValue(object, key, newValue);
+    assignValue(object, key, newValue === undefined ? source[key] : newValue);
   }
   return object;
 }
 
+/**
+ * Copies own symbol properties of `source` to `object`.
+ *
+ * @private
+ * @param {Object} source The object to copy symbols from.
+ * @param {Object} [object={}] The object to copy symbols to.
+ * @returns {Object} Returns `object`.
+ */
+function copySymbols(source, object) {
+  return copyObject(source, getSymbols(source), object);
+}
+
 /**
  * Creates a function like `_.assign`.
  *
@@ -769,7 +1420,7 @@ function copyObject(source, props, object, customizer) {
  * @returns {Function} Returns the new assigner function.
  */
 function createAssigner(assigner) {
-  return rest(function(object, sources) {
+  return baseRest(function(object, sources) {
     var index = -1,
         length = sources.length,
         customizer = length > 1 ? sources[length - 1] : undefined,
@@ -794,6 +1445,17 @@ function createAssigner(assigner) {
   });
 }
 
+/**
+ * Creates an array of own enumerable property names and symbols of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names and symbols.
+ */
+function getAllKeys(object) {
+  return baseGetAllKeys(object, keys, getSymbols);
+}
+
 /**
  * Gets the "length" property value of `object`.
  *
@@ -831,8 +1493,158 @@ function getMapData(map, key) {
  * @returns {*} Returns the function if it's native, else `undefined`.
  */
 function getNative(object, key) {
-  var value = object[key];
-  return isNative(value) ? value : undefined;
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Creates an array of the own enumerable symbol properties of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of symbols.
+ */
+var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArray;
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Initializes an array clone.
+ *
+ * @private
+ * @param {Array} array The array to clone.
+ * @returns {Array} Returns the initialized clone.
+ */
+function initCloneArray(array) {
+  var length = array.length,
+      result = array.constructor(length);
+
+  // Add properties assigned by `RegExp#exec`.
+  if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
+    result.index = array.index;
+    result.input = array.input;
+  }
+  return result;
+}
+
+/**
+ * Initializes an object clone.
+ *
+ * @private
+ * @param {Object} object The object to clone.
+ * @returns {Object} Returns the initialized clone.
+ */
+function initCloneObject(object) {
+  return (typeof object.constructor == 'function' && !isPrototype(object))
+    ? baseCreate(getPrototype(object))
+    : {};
+}
+
+/**
+ * Initializes an object clone based on its `toStringTag`.
+ *
+ * **Note:** This function only supports cloning values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to clone.
+ * @param {string} tag The `toStringTag` of the object to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the initialized clone.
+ */
+function initCloneByTag(object, tag, cloneFunc, isDeep) {
+  var Ctor = object.constructor;
+  switch (tag) {
+    case arrayBufferTag:
+      return cloneArrayBuffer(object);
+
+    case boolTag:
+    case dateTag:
+      return new Ctor(+object);
+
+    case dataViewTag:
+      return cloneDataView(object, isDeep);
+
+    case float32Tag: case float64Tag:
+    case int8Tag: case int16Tag: case int32Tag:
+    case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
+      return cloneTypedArray(object, isDeep);
+
+    case mapTag:
+      return cloneMap(object, isDeep, cloneFunc);
+
+    case numberTag:
+    case stringTag:
+      return new Ctor(object);
+
+    case regexpTag:
+      return cloneRegExp(object);
+
+    case setTag:
+      return cloneSet(object, isDeep, cloneFunc);
+
+    case symbolTag:
+      return cloneSymbol(object);
+  }
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
 }
 
 /**
@@ -888,6 +1700,31 @@ function isKeyable(value) {
     : (value === null);
 }
 
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
 /**
  * Converts `func` to its source code.
  *
@@ -921,8 +1758,8 @@ function toSource(func) {
  * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  * @example
  *
- * var object = { 'user': 'fred' };
- * var other = { 'user': 'fred' };
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
  *
  * _.eq(object, object);
  * // => true
@@ -951,7 +1788,7 @@ function eq(value, other) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
  *  else `false`.
  * @example
  *
@@ -973,11 +1810,9 @@ function isArguments(value) {
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -1052,6 +1887,25 @@ function isArrayLikeObject(value) {
   return isObjectLike(value) && isArrayLike(value);
 }
 
+/**
+ * Checks if `value` is a buffer.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.3.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
+ * @example
+ *
+ * _.isBuffer(new Buffer(2));
+ * // => true
+ *
+ * _.isBuffer(new Uint8Array(2));
+ * // => false
+ */
+var isBuffer = nativeIsBuffer || stubFalse;
+
 /**
  * Checks if `value` is classified as a `Function` object.
  *
@@ -1060,8 +1914,7 @@ function isArrayLikeObject(value) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -1169,29 +2022,68 @@ function isObjectLike(value) {
 }
 
 /**
- * Checks if `value` is a native function.
+ * Checks if `value` is a plain object, that is, an object created by the
+ * `Object` constructor or one with a `[[Prototype]]` of `null`.
  *
  * @static
  * @memberOf _
- * @since 3.0.0
+ * @since 0.8.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a native function,
+ * @returns {boolean} Returns `true` if `value` is a plain object,
  *  else `false`.
  * @example
  *
- * _.isNative(Array.prototype.push);
+ * function Foo() {
+ *   this.a = 1;
+ * }
+ *
+ * _.isPlainObject(new Foo);
+ * // => false
+ *
+ * _.isPlainObject([1, 2, 3]);
+ * // => false
+ *
+ * _.isPlainObject({ 'x': 0, 'y': 0 });
  * // => true
  *
- * _.isNative(_);
- * // => false
+ * _.isPlainObject(Object.create(null));
+ * // => true
  */
-function isNative(value) {
-  if (!isObject(value)) {
+function isPlainObject(value) {
+  if (!isObjectLike(value) ||
+      objectToString.call(value) != objectTag || isHostObject(value)) {
     return false;
   }
-  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
-  return pattern.test(toSource(value));
+  var proto = getPrototype(value);
+  if (proto === null) {
+    return true;
+  }
+  var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
+  return (typeof Ctor == 'function' &&
+    Ctor instanceof Ctor && funcToString.call(Ctor) == objectCtorString);
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
 }
 
 /**
@@ -1202,8 +2094,7 @@ function isNative(value) {
  * @since 3.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
  * @example
  *
  * _.isTypedArray(new Uint8Array);
@@ -1212,10 +2103,7 @@ function isNative(value) {
  * _.isTypedArray([]);
  * // => false
  */
-function isTypedArray(value) {
-  return isObjectLike(value) &&
-    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
-}
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
 
 /**
  * Converts `value` to a plain object flattening inherited enumerable string
@@ -1245,6 +2133,97 @@ function toPlainObject(value) {
   return copyObject(value, keysIn(value));
 }
 
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * Creates an array of the own and inherited enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keysIn(new Foo);
+ * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
+ */
+function keysIn(object) {
+  var index = -1,
+      isProto = isPrototype(object),
+      props = baseKeysIn(object),
+      propsLength = props.length,
+      indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  while (++index < propsLength) {
+    var key = props[index];
+    if (!(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * This method is like `_.merge` except that it accepts `customizer` which
  * is invoked to produce the merged values of the destination and source
@@ -1270,21 +2249,53 @@ function toPlainObject(value) {
  *   }
  * }
  *
- * var object = {
- *   'fruits': ['apple'],
- *   'vegetables': ['beet']
- * };
- *
- * var other = {
- *   'fruits': ['banana'],
- *   'vegetables': ['carrot']
- * };
+ * var object = { 'a': [1], 'b': [2] };
+ * var other = { 'a': [3], 'b': [4] };
  *
  * _.mergeWith(object, other, customizer);
- * // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot'] }
+ * // => { 'a': [1, 3], 'b': [2, 4] }
  */
 var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {
   baseMerge(object, source, srcIndex, customizer);
 });
 
+/**
+ * This method returns a new empty array.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {Array} Returns the new empty array.
+ * @example
+ *
+ * var arrays = _.times(2, _.stubArray);
+ *
+ * console.log(arrays);
+ * // => [[], []]
+ *
+ * console.log(arrays[0] === arrays[1]);
+ * // => false
+ */
+function stubArray() {
+  return [];
+}
+
+/**
+ * This method returns `false`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {boolean} Returns `false`.
+ * @example
+ *
+ * _.times(2, _.stubFalse);
+ * // => [false, false]
+ */
+function stubFalse() {
+  return false;
+}
+
 module.exports = mergeWith;
diff --git a/lodash.mergewith/package.json b/lodash.mergewith/package.json
index d27981ff1..2014dffca 100644
--- a/lodash.mergewith/package.json
+++ b/lodash.mergewith/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.mergewith",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.mergeWith` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,12 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseclone": "~4.5.0",
-    "lodash._root": "~3.0.0",
-    "lodash.isplainobject": "^4.0.0",
-    "lodash.keysin": "^4.0.0",
-    "lodash.rest": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.method/README.md b/lodash.method/README.md
index eb7dc90fe..6fffabb33 100644
--- a/lodash.method/README.md
+++ b/lodash.method/README.md
@@ -1,4 +1,4 @@
-# lodash.method v4.4.0
+# lodash.method v4.5.0
 
 The [lodash](https://lodash.com/) method `_.method` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var method = require('lodash.method');
 ```
 
-See the [documentation](https://lodash.com/docs#method) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.method) for more details.
+See the [documentation](https://lodash.com/docs#method) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.method) for more details.
diff --git a/lodash.method/index.js b/lodash.method/index.js
index d32a809a4..c88d24b38 100644
--- a/lodash.method/index.js
+++ b/lodash.method/index.js
@@ -6,19 +6,46 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseSlice = require('lodash._baseslice'),
-    rest = require('lodash.rest'),
-    stringToPath = require('lodash._stringtopath');
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
 /** Used as references for various `Number` constants. */
 var INFINITY = 1 / 0;
 
 /** `Object#toString` result references. */
-var symbolTag = '[object Symbol]';
+var funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    symbolTag = '[object Symbol]';
 
 /** Used to match property names within property paths. */
 var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
-    reIsPlainProp = /^\w*$/;
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
 
 /**
  * A faster alternative to `Function#apply`, this function invokes `func`
@@ -31,8 +58,7 @@ var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
  * @returns {*} Returns the result of `func`.
  */
 function apply(func, thisArg, args) {
-  var length = args.length;
-  switch (length) {
+  switch (args.length) {
     case 0: return func.call(thisArg);
     case 1: return func.call(thisArg, args[0]);
     case 2: return func.call(thisArg, args[0], args[1]);
@@ -41,8 +67,55 @@ function apply(func, thisArg, args) {
   return func.apply(thisArg, args);
 }
 
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
@@ -51,6 +124,349 @@ var objectProto = Object.prototype;
  */
 var objectToString = objectProto.toString;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeMax = Math.max;
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
 /**
  * The base implementation of `_.get` without support for default values.
  *
@@ -91,6 +507,101 @@ function baseInvoke(object, path, args) {
   return func == null ? undefined : apply(func, object, args);
 }
 
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.rest` which doesn't validate or coerce arguments.
+ *
+ * @private
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @returns {Function} Returns the new function.
+ */
+function baseRest(func, start) {
+  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+  return function() {
+    var args = arguments,
+        index = -1,
+        length = nativeMax(args.length - start, 0),
+        array = Array(length);
+
+    while (++index < length) {
+      array[index] = args[start + index];
+    }
+    index = -1;
+    var otherArgs = Array(start + 1);
+    while (++index < start) {
+      otherArgs[index] = args[index];
+    }
+    otherArgs[start] = array;
+    return apply(func, this, otherArgs);
+  };
+}
+
+/**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+function baseSlice(array, start, end) {
+  var index = -1,
+      length = array.length;
+
+  if (start < 0) {
+    start = -start > length ? 0 : (length + start);
+  }
+  end = end > length ? length : end;
+  if (end < 0) {
+    end += length;
+  }
+  length = start > end ? 0 : ((end - start) >>> 0);
+  start >>>= 0;
+
+  var result = Array(length);
+  while (++index < length) {
+    result[index] = array[index + start];
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Casts `value` to a path array if it's not one.
  *
@@ -102,6 +613,34 @@ function castPath(value) {
   return isArray(value) ? value : stringToPath(value);
 }
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
 /**
  * Checks if `value` is a property name and not a property path.
  *
@@ -123,6 +662,31 @@ function isKey(value, object) {
     (object != null && value in Object(object));
 }
 
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
 /**
  * Gets the parent value at `path` of `object`.
  *
@@ -135,6 +699,21 @@ function parent(object, path) {
   return path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
 }
 
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
 /**
  * Converts `value` to a string key if it's not a string or symbol.
  *
@@ -150,6 +729,25 @@ function toKey(value) {
   return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
 }
 
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Gets the last element of `array`.
  *
@@ -169,17 +767,118 @@ function last(array) {
   return length ? array[length - 1] : undefined;
 }
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -196,6 +895,61 @@ function last(array) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
 /**
  * Checks if `value` is object-like. A value is object-like if it's not `null`
  * and has a `typeof` result of "object".
@@ -232,8 +986,7 @@ function isObjectLike(value) {
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  * @example
  *
  * _.isSymbol(Symbol.iterator);
@@ -247,6 +1000,31 @@ function isSymbol(value) {
     (isObjectLike(value) && objectToString.call(value) == symbolTag);
 }
 
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
 /**
  * Creates a function that invokes the method at `path` of a given object.
  * Any additional arguments are provided to the invoked method.
@@ -271,7 +1049,7 @@ function isSymbol(value) {
  * _.map(objects, _.method(['a', 'b']));
  * // => [2, 1]
  */
-var method = rest(function(path, args) {
+var method = baseRest(function(path, args) {
   return function(object) {
     return baseInvoke(object, path, args);
   };
diff --git a/lodash.method/package.json b/lodash.method/package.json
index 81534cf7e..f40ef4a44 100644
--- a/lodash.method/package.json
+++ b/lodash.method/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.method",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.method` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseslice": "~4.0.0",
-    "lodash._stringtopath": "~4.8.0",
-    "lodash.rest": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.methodof/README.md b/lodash.methodof/README.md
index de9b87b5d..64ccc4d41 100644
--- a/lodash.methodof/README.md
+++ b/lodash.methodof/README.md
@@ -1,4 +1,4 @@
-# lodash.methodof v4.4.0
+# lodash.methodof v4.5.0
 
 The [lodash](https://lodash.com/) method `_.methodOf` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var methodOf = require('lodash.methodof');
 ```
 
-See the [documentation](https://lodash.com/docs#methodOf) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.methodof) for more details.
+See the [documentation](https://lodash.com/docs#methodOf) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.methodof) for more details.
diff --git a/lodash.methodof/index.js b/lodash.methodof/index.js
index fa8c621df..6b9343b0f 100644
--- a/lodash.methodof/index.js
+++ b/lodash.methodof/index.js
@@ -6,19 +6,46 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseSlice = require('lodash._baseslice'),
-    rest = require('lodash.rest'),
-    stringToPath = require('lodash._stringtopath');
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
 /** Used as references for various `Number` constants. */
 var INFINITY = 1 / 0;
 
 /** `Object#toString` result references. */
-var symbolTag = '[object Symbol]';
+var funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    symbolTag = '[object Symbol]';
 
 /** Used to match property names within property paths. */
 var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
-    reIsPlainProp = /^\w*$/;
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
 
 /**
  * A faster alternative to `Function#apply`, this function invokes `func`
@@ -31,8 +58,7 @@ var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
  * @returns {*} Returns the result of `func`.
  */
 function apply(func, thisArg, args) {
-  var length = args.length;
-  switch (length) {
+  switch (args.length) {
     case 0: return func.call(thisArg);
     case 1: return func.call(thisArg, args[0]);
     case 2: return func.call(thisArg, args[0], args[1]);
@@ -41,8 +67,55 @@ function apply(func, thisArg, args) {
   return func.apply(thisArg, args);
 }
 
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
@@ -51,6 +124,349 @@ var objectProto = Object.prototype;
  */
 var objectToString = objectProto.toString;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeMax = Math.max;
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
 /**
  * The base implementation of `_.get` without support for default values.
  *
@@ -91,6 +507,101 @@ function baseInvoke(object, path, args) {
   return func == null ? undefined : apply(func, object, args);
 }
 
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.rest` which doesn't validate or coerce arguments.
+ *
+ * @private
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @returns {Function} Returns the new function.
+ */
+function baseRest(func, start) {
+  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+  return function() {
+    var args = arguments,
+        index = -1,
+        length = nativeMax(args.length - start, 0),
+        array = Array(length);
+
+    while (++index < length) {
+      array[index] = args[start + index];
+    }
+    index = -1;
+    var otherArgs = Array(start + 1);
+    while (++index < start) {
+      otherArgs[index] = args[index];
+    }
+    otherArgs[start] = array;
+    return apply(func, this, otherArgs);
+  };
+}
+
+/**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+function baseSlice(array, start, end) {
+  var index = -1,
+      length = array.length;
+
+  if (start < 0) {
+    start = -start > length ? 0 : (length + start);
+  }
+  end = end > length ? length : end;
+  if (end < 0) {
+    end += length;
+  }
+  length = start > end ? 0 : ((end - start) >>> 0);
+  start >>>= 0;
+
+  var result = Array(length);
+  while (++index < length) {
+    result[index] = array[index + start];
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Casts `value` to a path array if it's not one.
  *
@@ -102,6 +613,34 @@ function castPath(value) {
   return isArray(value) ? value : stringToPath(value);
 }
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
 /**
  * Checks if `value` is a property name and not a property path.
  *
@@ -123,6 +662,31 @@ function isKey(value, object) {
     (object != null && value in Object(object));
 }
 
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
 /**
  * Gets the parent value at `path` of `object`.
  *
@@ -135,6 +699,21 @@ function parent(object, path) {
   return path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
 }
 
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
 /**
  * Converts `value` to a string key if it's not a string or symbol.
  *
@@ -150,6 +729,25 @@ function toKey(value) {
   return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
 }
 
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Gets the last element of `array`.
  *
@@ -169,17 +767,118 @@ function last(array) {
   return length ? array[length - 1] : undefined;
 }
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -196,6 +895,61 @@ function last(array) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
 /**
  * Checks if `value` is object-like. A value is object-like if it's not `null`
  * and has a `typeof` result of "object".
@@ -232,8 +986,7 @@ function isObjectLike(value) {
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  * @example
  *
  * _.isSymbol(Symbol.iterator);
@@ -247,6 +1000,31 @@ function isSymbol(value) {
     (isObjectLike(value) && objectToString.call(value) == symbolTag);
 }
 
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
 /**
  * The opposite of `_.method`; this method creates a function that invokes
  * the method at a given path of `object`. Any additional arguments are
@@ -270,7 +1048,7 @@ function isSymbol(value) {
  * _.map([['a', '2'], ['c', '0']], _.methodOf(object));
  * // => [2, 0]
  */
-var methodOf = rest(function(object, args) {
+var methodOf = baseRest(function(object, args) {
   return function(path) {
     return baseInvoke(object, path, args);
   };
diff --git a/lodash.methodof/package.json b/lodash.methodof/package.json
index 437a81334..a57e47ca4 100644
--- a/lodash.methodof/package.json
+++ b/lodash.methodof/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.methodof",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.methodOf` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseslice": "~4.0.0",
-    "lodash._stringtopath": "~4.8.0",
-    "lodash.rest": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.minby/README.md b/lodash.minby/README.md
index 5b6d96d0e..eec7ae529 100644
--- a/lodash.minby/README.md
+++ b/lodash.minby/README.md
@@ -1,4 +1,4 @@
-# lodash.minby v4.4.0
+# lodash.minby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.minBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var minBy = require('lodash.minby');
 ```
 
-See the [documentation](https://lodash.com/docs#minBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.minby) for more details.
+See the [documentation](https://lodash.com/docs#minBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.minby) for more details.
diff --git a/lodash.minby/index.js b/lodash.minby/index.js
index b46c71810..a061e618e 100644
--- a/lodash.minby/index.js
+++ b/lodash.minby/index.js
@@ -6,13 +6,285 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
-var symbolTag = '[object Symbol]';
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
 
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
@@ -21,6 +293,506 @@ var objectProto = Object.prototype;
  */
 var objectToString = objectProto.toString;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
 /**
  * The base implementation of methods like `_.max` and `_.min` which accepts a
  * `comparator` to determine the extremum value.
@@ -51,7 +823,266 @@ function baseExtremum(array, iteratee, comparator) {
 }
 
 /**
- * The base implementation of `_.lt` which doesn't coerce arguments to numbers.
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.lt` which doesn't coerce arguments.
  *
  * @private
  * @param {*} value The value to compare.
@@ -63,6 +1094,925 @@ function baseLt(value, other) {
   return value < other;
 }
 
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
 /**
  * Checks if `value` is object-like. A value is object-like if it's not `null`
  * and has a `typeof` result of "object".
@@ -91,6 +2041,28 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
 /**
  * Checks if `value` is classified as a `Symbol` primitive or object.
  *
@@ -99,8 +2071,7 @@ function isObjectLike(value) {
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  * @example
  *
  * _.isSymbol(Symbol.iterator);
@@ -114,6 +2085,204 @@ function isSymbol(value) {
     (isObjectLike(value) && objectToString.call(value) == symbolTag);
 }
 
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 /**
  * This method is like `_.min` except that it accepts `iteratee` which is
  * invoked for each element in `array` to generate the criterion by which
@@ -124,8 +2293,7 @@ function isSymbol(value) {
  * @since 4.0.0
  * @category Math
  * @param {Array} array The array to iterate over.
- * @param {Array|Function|Object|string} [iteratee=_.identity]
- *  The iteratee invoked per element.
+ * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  * @returns {*} Returns the minimum value.
  * @example
  *
@@ -140,7 +2308,7 @@ function isSymbol(value) {
  */
 function minBy(array, iteratee) {
   return (array && array.length)
-    ? baseExtremum(array, baseIteratee(iteratee), baseLt)
+    ? baseExtremum(array, baseIteratee(iteratee, 2), baseLt)
     : undefined;
 }
 
diff --git a/lodash.minby/package.json b/lodash.minby/package.json
index 76507df45..b8b8fea9c 100644
--- a/lodash.minby/package.json
+++ b/lodash.minby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.minby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.minBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,8 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.omit/README.md b/lodash.omit/README.md
index a8c6146e3..b3811d5cf 100644
--- a/lodash.omit/README.md
+++ b/lodash.omit/README.md
@@ -1,4 +1,4 @@
-# lodash.omit v4.4.1
+# lodash.omit v4.5.0
 
 The [lodash](https://lodash.com/) method `_.omit` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var omit = require('lodash.omit');
 ```
 
-See the [documentation](https://lodash.com/docs#omit) or [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash.omit) for more details.
+See the [documentation](https://lodash.com/docs#omit) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.omit) for more details.
diff --git a/lodash.omit/index.js b/lodash.omit/index.js
index c4bd9eb1f..c82989efe 100644
--- a/lodash.omit/index.js
+++ b/lodash.omit/index.js
@@ -21,12 +21,11 @@ var INFINITY = 1 / 0,
 var argsTag = '[object Arguments]',
     funcTag = '[object Function]',
     genTag = '[object GeneratorFunction]',
-    stringTag = '[object String]',
     symbolTag = '[object Symbol]';
 
 /**
  * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
@@ -70,7 +69,7 @@ function apply(func, thisArg, args) {
  * specifying an index to search from.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
  */
@@ -83,7 +82,7 @@ function arrayIncludes(array, value) {
  * This function is like `arrayIncludes` except that it accepts a comparator.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @param {Function} comparator The comparator invoked per element.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
@@ -144,7 +143,7 @@ function arrayPush(array, values) {
  * support for iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {Function} predicate The function invoked per iteration.
  * @param {number} fromIndex The index to search from.
  * @param {boolean} [fromRight] Specify iterating from right to left.
@@ -166,7 +165,7 @@ function baseFindIndex(array, predicate, fromIndex, fromRight) {
  * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} value The value to search for.
  * @param {number} fromIndex The index to search from.
  * @returns {number} Returns the index of the matched value, else `-1`.
@@ -197,19 +196,6 @@ function baseIsNaN(value) {
   return value !== value;
 }
 
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
 /**
  * The base implementation of `_.times` without support for iteratee shorthands
  * or max array length checks.
@@ -286,24 +272,7 @@ function isHostObject(value) {
 }
 
 /**
- * Converts `iterator` to an array.
- *
- * @private
- * @param {Object} iterator The iterator to convert.
- * @returns {Array} Returns the converted array.
- */
-function iteratorToArray(iterator) {
-  var data,
-      result = [];
-
-  while (!(data = iterator.next()).done) {
-    result.push(data.value);
-  }
-  return result;
-}
-
-/**
- * Creates a function that invokes `func` with its first argument transformed.
+ * Creates a unary function that invokes `func` with its argument transformed.
  *
  * @private
  * @param {Function} func The function to wrap.
@@ -318,6 +287,7 @@ function overArg(func, transform) {
 
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
+    funcProto = Function.prototype,
     objectProto = Object.prototype;
 
 /** Used to detect overreaching core-js shims. */
@@ -330,14 +300,14 @@ var maskSrcKey = (function() {
 }());
 
 /** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
+var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -349,16 +319,14 @@ var reIsNative = RegExp('^' +
 );
 
 /** Built-in value references. */
-var Reflect = root.Reflect,
-    Symbol = root.Symbol,
-    enumerate = Reflect ? Reflect.enumerate : undefined,
+var Symbol = root.Symbol,
+    getPrototype = overArg(Object.getPrototypeOf, Object),
     propertyIsEnumerable = objectProto.propertyIsEnumerable,
     splice = arrayProto.splice,
     spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined;
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf,
-    nativeGetSymbols = Object.getOwnPropertySymbols,
+var nativeGetSymbols = Object.getOwnPropertySymbols,
     nativeMax = Math.max;
 
 /* Built-in method references that are verified to be native. */
@@ -719,11 +687,38 @@ function setCacheHas(value) {
 SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
 SetCache.prototype.has = setCacheHas;
 
+/**
+ * Creates an array of the enumerable property names of the array-like `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @param {boolean} inherited Specify returning inherited property names.
+ * @returns {Array} Returns the array of property names.
+ */
+function arrayLikeKeys(value, inherited) {
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
+  // Safari 9 makes `arguments.length` enumerable in strict mode.
+  var result = (isArray(value) || isArguments(value))
+    ? baseTimes(value.length, String)
+    : [];
+
+  var length = result.length,
+      skipIndexes = !!length;
+
+  for (var key in value) {
+    if ((inherited || hasOwnProperty.call(value, key)) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * Gets the index at which the `key` is found in `array` of key-value pairs.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} key The key to search for.
  * @returns {number} Returns the index of the matched value, else `-1`.
  */
@@ -860,30 +855,27 @@ function baseIsNative(value) {
 }
 
 /**
- * The base implementation of `_.keysIn` which doesn't skip the constructor
- * property of prototypes or treat sparse arrays as dense.
+ * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
  *
  * @private
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of property names.
  */
 function baseKeysIn(object) {
-  object = object == null ? object : Object(object);
+  if (!isObject(object)) {
+    return nativeKeysIn(object);
+  }
+  var isProto = isPrototype(object),
+      result = [];
 
-  var result = [];
   for (var key in object) {
-    result.push(key);
+    if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
+      result.push(key);
+    }
   }
   return result;
 }
 
-// Fallback for IE < 9 with es6-shim.
-if (enumerate && !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf')) {
-  baseKeysIn = function(object) {
-    return iteratorToArray(enumerate(object));
-  };
-}
-
 /**
  * The base implementation of `_.pick` without support for individual
  * property identifiers.
@@ -966,19 +958,6 @@ function getAllKeysIn(object) {
   return baseGetAllKeys(object, keysIn, getSymbolsIn);
 }
 
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
 /**
  * Gets the data for `map`.
  *
@@ -1007,15 +986,6 @@ function getNative(object, key) {
   return baseIsNative(value) ? value : undefined;
 }
 
-/**
- * Gets the `[[Prototype]]` of `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {null|Object} Returns the `[[Prototype]]`.
- */
-var getPrototype = overArg(nativeGetPrototype, Object);
-
 /**
  * Creates an array of the own enumerable symbol properties of `object`.
  *
@@ -1042,23 +1012,6 @@ var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
   return result;
 };
 
-/**
- * Creates an array of index keys for `object` values of arrays,
- * `arguments` objects, and strings, otherwise `null` is returned.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array|null} Returns index keys, else `null`.
- */
-function indexKeys(object) {
-  var length = object ? object.length : undefined;
-  if (isLength(length) &&
-      (isArray(object) || isString(object) || isArguments(object))) {
-    return baseTimes(length, String);
-  }
-  return null;
-}
-
 /**
  * Checks if `value` is a flattenable `arguments` object or array.
  *
@@ -1125,6 +1078,25 @@ function isPrototype(value) {
   return value === proto;
 }
 
+/**
+ * This function is like
+ * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+ * except that it includes inherited enumerable properties.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+function nativeKeysIn(object) {
+  var result = [];
+  if (object != null) {
+    for (var key in Object(object)) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * Converts `value` to a string key if it's not a string or symbol.
  *
@@ -1161,7 +1133,7 @@ function toSource(func) {
 
 /**
  * Performs a
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * comparison between two values to determine if they are equivalent.
  *
  * @static
@@ -1214,7 +1186,7 @@ function eq(value, other) {
  * // => false
  */
 function isArguments(value) {
-  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
   return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
     (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
@@ -1270,7 +1242,7 @@ var isArray = Array.isArray;
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -1321,8 +1293,7 @@ function isArrayLikeObject(value) {
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -1330,16 +1301,15 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);
@@ -1361,7 +1331,7 @@ function isLength(value) {
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
@@ -1417,28 +1387,6 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
-/**
- * Checks if `value` is classified as a `String` primitive or object.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a string, else `false`.
- * @example
- *
- * _.isString('abc');
- * // => true
- *
- * _.isString(1);
- * // => false
- */
-function isString(value) {
-  return typeof value == 'string' ||
-    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
-}
-
 /**
  * Checks if `value` is classified as a `Symbol` primitive or object.
  *
@@ -1485,23 +1433,7 @@ function isSymbol(value) {
  * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
  */
 function keysIn(object) {
-  var index = -1,
-      isProto = isPrototype(object),
-      props = baseKeysIn(object),
-      propsLength = props.length,
-      indexes = indexKeys(object),
-      skipIndexes = !!indexes,
-      result = indexes || [],
-      length = result.length;
-
-  while (++index < propsLength) {
-    var key = props[index];
-    if (!(skipIndexes && (key == 'length' || isIndex(key, length))) &&
-        !(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
-      result.push(key);
-    }
-  }
-  return result;
+  return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
 }
 
 /**
diff --git a/lodash.omit/package.json b/lodash.omit/package.json
index 33d4d03fb..7543c62a5 100644
--- a/lodash.omit/package.json
+++ b/lodash.omit/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.omit",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The lodash method `_.omit` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.omitby/README.md b/lodash.omitby/README.md
index 7477dd728..f089c91e9 100644
--- a/lodash.omitby/README.md
+++ b/lodash.omitby/README.md
@@ -1,4 +1,4 @@
-# lodash.omitby v4.4.0
+# lodash.omitby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.omitBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var omitBy = require('lodash.omitby');
 ```
 
-See the [documentation](https://lodash.com/docs#omitBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.omitby) for more details.
+See the [documentation](https://lodash.com/docs#omitBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.omitby) for more details.
diff --git a/lodash.omitby/index.js b/lodash.omitby/index.js
index 7afdb868d..b672dfeb5 100644
--- a/lodash.omitby/index.js
+++ b/lodash.omitby/index.js
@@ -6,8 +6,120 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseIteratee = require('lodash._baseiteratee'),
-    keysIn = require('lodash.keysin');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
 
 /**
  * Appends the elements of `values` to `array`.
@@ -28,11 +140,717 @@ function arrayPush(array, values) {
   return array;
 }
 
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `iterator` to an array.
+ *
+ * @private
+ * @param {Object} iterator The iterator to convert.
+ * @returns {Array} Returns the converted array.
+ */
+function iteratorToArray(iterator) {
+  var data,
+      result = [];
+
+  while (!(data = iterator.next()).done) {
+    result.push(data.value);
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
 /** Built-in value references. */
-var getOwnPropertySymbols = Object.getOwnPropertySymbols;
+var Reflect = root.Reflect,
+    Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    enumerate = Reflect ? Reflect.enumerate : undefined,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf;
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeGetSymbols = Object.getOwnPropertySymbols,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
 
 /**
  * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
@@ -50,17 +868,318 @@ function baseGetAllKeys(object, keysFunc, symbolsFunc) {
   return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
 }
 
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.keysIn` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+function baseKeysIn(object) {
+  object = object == null ? object : Object(object);
+
+  var result = [];
+  for (var key in object) {
+    result.push(key);
+  }
+  return result;
+}
+
+// Fallback for IE < 9 with es6-shim.
+if (enumerate && !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf')) {
+  baseKeysIn = function(object) {
+    return iteratorToArray(enumerate(object));
+  };
+}
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
 /**
  * The base implementation of  `_.pickBy` without support for iteratee shorthands.
  *
  * @private
  * @param {Object} object The source object.
+ * @param {string[]} props The property identifiers to pick from.
  * @param {Function} predicate The function invoked per property.
  * @returns {Object} Returns the new object.
  */
-function basePickBy(object, predicate) {
+function basePickBy(object, props, predicate) {
   var index = -1,
-      props = getAllKeysIn(object),
       length = props.length,
       result = {};
 
@@ -75,6 +1194,284 @@ function basePickBy(object, predicate) {
   return result;
 }
 
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
 /**
  * Creates an array of own and inherited enumerable property names and
  * symbols of `object`.
@@ -87,6 +1484,67 @@ function getAllKeysIn(object) {
   return baseGetAllKeys(object, keysIn, getSymbolsIn);
 }
 
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
 /**
  * Gets the `[[Prototype]]` of `value`.
  *
@@ -94,9 +1552,7 @@ function getAllKeysIn(object) {
  * @param {*} value The value to query.
  * @returns {null|Object} Returns the `[[Prototype]]`.
  */
-function getPrototype(value) {
-  return nativeGetPrototype(Object(value));
-}
+var getPrototype = overArg(nativeGetPrototype, Object);
 
 /**
  * Creates an array of the own enumerable symbol properties of `object`.
@@ -105,18 +1561,7 @@ function getPrototype(value) {
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of symbols.
  */
-function getSymbols(object) {
-  // Coerce `object` to an object to avoid non-object errors in V8.
-  // See https://bugs.chromium.org/p/v8/issues/detail?id=3443 for more details.
-  return getOwnPropertySymbols(Object(object));
-}
-
-// Fallback for IE < 11.
-if (!getOwnPropertySymbols) {
-  getSymbols = function() {
-    return [];
-  };
-}
+var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArray;
 
 /**
  * Creates an array of the own and inherited enumerable symbol properties
@@ -126,7 +1571,7 @@ if (!getOwnPropertySymbols) {
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of symbols.
  */
-var getSymbolsIn = !getOwnPropertySymbols ? getSymbols : function(object) {
+var getSymbolsIn = !nativeGetSymbols ? getSymbols : function(object) {
   var result = [];
   while (object) {
     arrayPush(result, getSymbols(object));
@@ -135,17 +1580,415 @@ var getSymbolsIn = !getOwnPropertySymbols ? getSymbols : function(object) {
   return result;
 };
 
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Creates a function that negates the result of the predicate `func`. The
+ * `func` predicate is invoked with the `this` binding and arguments of the
+ * created function.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Function
+ * @param {Function} predicate The predicate to negate.
+ * @returns {Function} Returns the new negated function.
+ * @example
+ *
+ * function isEven(n) {
+ *   return n % 2 == 0;
+ * }
+ *
+ * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
+ * // => [1, 3, 5]
+ */
+function negate(predicate) {
+  if (typeof predicate != 'function') {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  return function() {
+    var args = arguments;
+    switch (args.length) {
+      case 0: return !predicate.call(this);
+      case 1: return !predicate.call(this, args[0]);
+      case 2: return !predicate.call(this, args[0], args[1]);
+      case 3: return !predicate.call(this, args[0], args[1], args[2]);
+    }
+    return !predicate.apply(this, args);
+  };
+}
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -162,6 +2005,418 @@ var getSymbolsIn = !getOwnPropertySymbols ? getSymbols : function(object) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * Creates an array of the own and inherited enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keysIn(new Foo);
+ * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
+ */
+function keysIn(object) {
+  var index = -1,
+      isProto = isPrototype(object),
+      props = baseKeysIn(object),
+      propsLength = props.length,
+      indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  while (++index < propsLength) {
+    var key = props[index];
+    if (!(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * The opposite of `_.pickBy`; this method creates an object composed of
  * the own and inherited enumerable string keyed properties of `object` that
@@ -173,8 +2428,7 @@ var isArray = Array.isArray;
  * @since 4.0.0
  * @category Object
  * @param {Object} object The source object.
- * @param {Array|Function|Object|string} [predicate=_.identity]
- *  The function invoked per property.
+ * @param {Function} [predicate=_.identity] The function invoked per property.
  * @returns {Object} Returns the new object.
  * @example
  *
@@ -184,10 +2438,97 @@ var isArray = Array.isArray;
  * // => { 'b': '2' }
  */
 function omitBy(object, predicate) {
-  predicate = baseIteratee(predicate);
-  return basePickBy(object, function(value, key) {
-    return !predicate(value, key);
-  });
+  return pickBy(object, negate(baseIteratee(predicate)));
+}
+
+/**
+ * Creates an object composed of the `object` properties `predicate` returns
+ * truthy for. The predicate is invoked with two arguments: (value, key).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The source object.
+ * @param {Function} [predicate=_.identity] The function invoked per property.
+ * @returns {Object} Returns the new object.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': '2', 'c': 3 };
+ *
+ * _.pickBy(object, _.isNumber);
+ * // => { 'a': 1, 'c': 3 }
+ */
+function pickBy(object, predicate) {
+  return object == null ? {} : basePickBy(object, getAllKeysIn(object), baseIteratee(predicate));
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
+/**
+ * This method returns a new empty array.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {Array} Returns the new empty array.
+ * @example
+ *
+ * var arrays = _.times(2, _.stubArray);
+ *
+ * console.log(arrays);
+ * // => [[], []]
+ *
+ * console.log(arrays[0] === arrays[1]);
+ * // => false
+ */
+function stubArray() {
+  return [];
 }
 
 module.exports = omitBy;
diff --git a/lodash.omitby/package.json b/lodash.omitby/package.json
index dd470f374..f867bf9c8 100644
--- a/lodash.omitby/package.json
+++ b/lodash.omitby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.omitby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.omitBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseiteratee": "~4.7.0",
-    "lodash.keysin": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.orderby/README.md b/lodash.orderby/README.md
index 8e5051c59..7ff2ce239 100644
--- a/lodash.orderby/README.md
+++ b/lodash.orderby/README.md
@@ -1,4 +1,4 @@
-# lodash.orderby v4.4.0
+# lodash.orderby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.orderBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var orderBy = require('lodash.orderby');
 ```
 
-See the [documentation](https://lodash.com/docs#orderBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.orderby) for more details.
+See the [documentation](https://lodash.com/docs#orderBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.orderby) for more details.
diff --git a/lodash.orderby/index.js b/lodash.orderby/index.js
index 578d04d74..d0bd2504b 100644
--- a/lodash.orderby/index.js
+++ b/lodash.orderby/index.js
@@ -6,29 +6,133 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseEach = require('lodash._baseeach'),
-    baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
 
 /** Used as references for various `Number` constants. */
-var MAX_SAFE_INTEGER = 9007199254740991;
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
-var funcTag = '[object Function]',
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
     genTag = '[object GeneratorFunction]',
-    symbolTag = '[object Symbol]';
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
 
 /**
  * A specialized version of `_.map` for arrays without support for iteratee
  * shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @returns {Array} Returns the new mapped array.
  */
 function arrayMap(array, iteratee) {
   var index = -1,
-      length = array.length,
+      length = array ? array.length : 0,
       result = Array(length);
 
   while (++index < length) {
@@ -37,6 +141,41 @@ function arrayMap(array, iteratee) {
   return result;
 }
 
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
 /**
  * The base implementation of `_.sortBy` which uses `comparer` to define the
  * sort order of `array` and replaces criteria objects with their corresponding
@@ -58,7 +197,26 @@ function baseSortBy(array, comparer) {
 }
 
 /**
- * The base implementation of `_.unary` without support for storing wrapper metadata.
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
  *
  * @private
  * @param {Function} func The function to cap arguments for.
@@ -70,8 +228,103 @@ function baseUnary(func) {
   };
 }
 
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
@@ -80,6 +333,800 @@ var objectProto = Object.prototype;
  */
 var objectToString = objectProto.toString;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.forEach` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ */
+var baseEach = createBaseEach(baseForOwn);
+
+/**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
+
+/**
+ * The base implementation of `_.forOwn` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+function baseForOwn(object, iteratee) {
+  return object && baseFor(object, iteratee, keys);
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
 /**
  * The base implementation of `_.map` without support for iteratee shorthands.
  *
@@ -98,6 +1145,43 @@ function baseMap(collection, iteratee) {
   return result;
 }
 
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
 /**
  * The base implementation of `_.orderBy` without param guards.
  *
@@ -124,18 +1208,49 @@ function baseOrderBy(collection, iteratees, orders) {
 }
 
 /**
- * The base implementation of `_.property` without support for deep paths.
+ * A specialized version of `baseProperty` which supports deep paths.
  *
  * @private
- * @param {string} key The key of the property to get.
+ * @param {Array|string} path The path of the property to get.
  * @returns {Function} Returns the new accessor function.
  */
-function baseProperty(key) {
+function basePropertyDeep(path) {
   return function(object) {
-    return object == null ? undefined : object[key];
+    return baseGet(object, path);
   };
 }
 
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
 /**
  * Compares values to sort them in ascending order.
  *
@@ -215,6 +1330,293 @@ function compareMultiple(object, other, orders) {
   return object.index - other.index;
 }
 
+/**
+ * Creates a `baseEach` or `baseEachRight` function.
+ *
+ * @private
+ * @param {Function} eachFunc The function to iterate over a collection.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseEach(eachFunc, fromRight) {
+  return function(collection, iteratee) {
+    if (collection == null) {
+      return collection;
+    }
+    if (!isArrayLike(collection)) {
+      return eachFunc(collection, iteratee);
+    }
+    var length = collection.length,
+        index = fromRight ? length : -1,
+        iterable = Object(collection);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (iteratee(iterable[index], index, iterable) === false) {
+        break;
+      }
+    }
+    return collection;
+  };
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
 /**
  * Gets the "length" property value of `object`.
  *
@@ -228,6 +1630,300 @@ function compareMultiple(object, other, orders) {
  */
 var getLength = baseProperty('length');
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * This method is like `_.sortBy` except that it allows specifying the sort
  * orders of the iteratees to sort by. If `orders` is unspecified, all values
@@ -271,17 +1967,142 @@ function orderBy(collection, iteratees, orders, guard) {
   return baseOrderBy(collection, iteratees, orders);
 }
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -327,6 +2148,35 @@ function isArrayLike(value) {
   return value != null && isLength(getLength(value)) && !isFunction(value);
 }
 
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
 /**
  * Checks if `value` is classified as a `Function` object.
  *
@@ -335,8 +2185,7 @@ function isArrayLike(value) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -443,6 +2292,28 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
 /**
  * Checks if `value` is classified as a `Symbol` primitive or object.
  *
@@ -451,8 +2322,7 @@ function isObjectLike(value) {
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  * @example
  *
  * _.isSymbol(Symbol.iterator);
@@ -467,7 +2337,159 @@ function isSymbol(value) {
 }
 
 /**
- * This method returns the first argument given to it.
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
  *
  * @static
  * @since 0.1.0
@@ -477,13 +2499,39 @@ function isSymbol(value) {
  * @returns {*} Returns `value`.
  * @example
  *
- * var object = { 'user': 'fred' };
+ * var object = { 'a': 1 };
  *
- * _.identity(object) === object;
+ * console.log(_.identity(object) === object);
  * // => true
  */
 function identity(value) {
   return value;
 }
 
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = orderBy;
diff --git a/lodash.orderby/package.json b/lodash.orderby/package.json
index 5e814e757..87499f50a 100644
--- a/lodash.orderby/package.json
+++ b/lodash.orderby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.orderby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.orderBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseeach": "~4.1.0",
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.over/README.md b/lodash.over/README.md
index 87c82949a..c65a4fc4c 100644
--- a/lodash.over/README.md
+++ b/lodash.over/README.md
@@ -1,4 +1,4 @@
-# lodash.over v4.4.1
+# lodash.over v4.5.0
 
 The [lodash](https://lodash.com/) method `_.over` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var over = require('lodash.over');
 ```
 
-See the [documentation](https://lodash.com/docs#over) or [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash.over) for more details.
+See the [documentation](https://lodash.com/docs#over) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.over) for more details.
diff --git a/lodash.over/package.json b/lodash.over/package.json
index 5e0b76252..58426aa2b 100644
--- a/lodash.over/package.json
+++ b/lodash.over/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.over",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The lodash method `_.over` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -16,7 +16,7 @@
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
     "lodash._baseflatten": "~4.2.0",
-    "lodash._baseiteratee": "~4.6.0",
+    "lodash._baseiteratee": "~4.7.0",
     "lodash.rest": "^4.0.0"
   }
 }
diff --git a/lodash.overargs/README.md b/lodash.overargs/README.md
index 9e744565c..639a93df3 100644
--- a/lodash.overargs/README.md
+++ b/lodash.overargs/README.md
@@ -1,4 +1,4 @@
-# lodash.overargs v4.4.1
+# lodash.overargs v4.5.0
 
 The [lodash](https://lodash.com/) method `_.overArgs` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var overArgs = require('lodash.overargs');
 ```
 
-See the [documentation](https://lodash.com/docs#overArgs) or [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash.overargs) for more details.
+See the [documentation](https://lodash.com/docs#overArgs) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.overargs) for more details.
diff --git a/lodash.overargs/package.json b/lodash.overargs/package.json
index 2749eb7d2..a135cd908 100644
--- a/lodash.overargs/package.json
+++ b/lodash.overargs/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.overargs",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The lodash method `_.overArgs` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -16,7 +16,7 @@
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
     "lodash._baseflatten": "~4.2.0",
-    "lodash._baseiteratee": "~4.6.0",
+    "lodash._baseiteratee": "~4.7.0",
     "lodash.rest": "^4.0.0"
   }
 }
diff --git a/lodash.overevery/README.md b/lodash.overevery/README.md
index 8ab033051..4bdabeb43 100644
--- a/lodash.overevery/README.md
+++ b/lodash.overevery/README.md
@@ -1,4 +1,4 @@
-# lodash.overevery v4.4.1
+# lodash.overevery v4.5.0
 
 The [lodash](https://lodash.com/) method `_.overEvery` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var overEvery = require('lodash.overevery');
 ```
 
-See the [documentation](https://lodash.com/docs#overEvery) or [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash.overevery) for more details.
+See the [documentation](https://lodash.com/docs#overEvery) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.overevery) for more details.
diff --git a/lodash.overevery/package.json b/lodash.overevery/package.json
index 865c6338f..ef6307d4f 100644
--- a/lodash.overevery/package.json
+++ b/lodash.overevery/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.overevery",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The lodash method `_.overEvery` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -16,7 +16,7 @@
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
     "lodash._baseflatten": "~4.2.0",
-    "lodash._baseiteratee": "~4.6.0",
+    "lodash._baseiteratee": "~4.7.0",
     "lodash.rest": "^4.0.0"
   }
 }
diff --git a/lodash.oversome/README.md b/lodash.oversome/README.md
index b86ab2496..459626f02 100644
--- a/lodash.oversome/README.md
+++ b/lodash.oversome/README.md
@@ -1,4 +1,4 @@
-# lodash.oversome v4.4.1
+# lodash.oversome v4.5.0
 
 The [lodash](https://lodash.com/) method `_.overSome` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var overSome = require('lodash.oversome');
 ```
 
-See the [documentation](https://lodash.com/docs#overSome) or [package source](https://github.com/lodash/lodash/blob/4.4.1-npm-packages/lodash.oversome) for more details.
+See the [documentation](https://lodash.com/docs#overSome) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.oversome) for more details.
diff --git a/lodash.oversome/package.json b/lodash.oversome/package.json
index f087d5ad4..76a6e665f 100644
--- a/lodash.oversome/package.json
+++ b/lodash.oversome/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.oversome",
-  "version": "4.4.1",
+  "version": "4.5.0",
   "description": "The lodash method `_.overSome` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -16,7 +16,7 @@
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
     "lodash._baseflatten": "~4.2.0",
-    "lodash._baseiteratee": "~4.6.0",
+    "lodash._baseiteratee": "~4.7.0",
     "lodash.rest": "^4.0.0"
   }
 }
diff --git a/lodash.pad/README.md b/lodash.pad/README.md
index 57fb58591..3a00ac23a 100644
--- a/lodash.pad/README.md
+++ b/lodash.pad/README.md
@@ -1,4 +1,4 @@
-# lodash.pad v4.4.0
+# lodash.pad v4.5.0
 
 The [lodash](https://lodash.com/) method `_.pad` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var pad = require('lodash.pad');
 ```
 
-See the [documentation](https://lodash.com/docs#pad) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.pad) for more details.
+See the [documentation](https://lodash.com/docs#pad) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.pad) for more details.
diff --git a/lodash.pad/index.js b/lodash.pad/index.js
index 876fbb967..e05a59eec 100644
--- a/lodash.pad/index.js
+++ b/lodash.pad/index.js
@@ -6,9 +6,6 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseSlice = require('lodash._baseslice'),
-    baseToString = require('lodash._basetostring'),
-    toString = require('lodash.tostring');
 
 /** Used as references for various `Number` constants. */
 var INFINITY = 1 / 0,
@@ -65,6 +62,15 @@ var reHasComplexSymbol = RegExp('[' + rsZWJ + rsAstralRange  + rsComboMarksRange
 /** Built-in method references without a dependency on `root`. */
 var freeParseInt = parseInt;
 
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
 /**
  * Gets the number of symbols in `string`.
  *
@@ -104,10 +110,17 @@ var objectProto = Object.prototype;
  */
 var objectToString = objectProto.toString;
 
+/** Built-in value references. */
+var Symbol = root.Symbol;
+
 /* Built-in method references for those with the same name as other `lodash` methods. */
 var nativeCeil = Math.ceil,
     nativeFloor = Math.floor;
 
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
 /**
  * The base implementation of `_.repeat` which doesn't coerce arguments.
  *
@@ -136,6 +149,56 @@ function baseRepeat(string, n) {
   return result;
 }
 
+/**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+function baseSlice(array, start, end) {
+  var index = -1,
+      length = array.length;
+
+  if (start < 0) {
+    start = -start > length ? 0 : (length + start);
+  }
+  end = end > length ? length : end;
+  if (end < 0) {
+    end += length;
+  }
+  length = start > end ? 0 : ((end - start) >>> 0);
+  start >>>= 0;
+
+  var result = Array(length);
+  while (++index < length) {
+    result[index] = array[index + start];
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Casts `array` to a slice if it's needed.
  *
@@ -181,8 +244,7 @@ function createPadding(length, chars) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -265,8 +327,7 @@ function isObjectLike(value) {
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  * @example
  *
  * _.isSymbol(Symbol.iterator);
@@ -318,7 +379,7 @@ function toFinite(value) {
 /**
  * Converts `value` to an integer.
  *
- * **Note:** This function is loosely based on
+ * **Note:** This method is loosely based on
  * [`ToInteger`](http://www.ecma-international.org/ecma-262/6.0/#sec-tointeger).
  *
  * @static
@@ -392,6 +453,31 @@ function toNumber(value) {
     : (reIsBadHex.test(value) ? NAN : +value);
 }
 
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
 /**
  * Pads `string` on the left and right sides if it's shorter than `length`.
  * Padding characters are truncated if they can't be evenly divided by `length`.
diff --git a/lodash.pad/package.json b/lodash.pad/package.json
index d766d9961..ec1ed57ef 100644
--- a/lodash.pad/package.json
+++ b/lodash.pad/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.pad",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.pad` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseslice": "~4.0.0",
-    "lodash._basetostring": "~4.12.0",
-    "lodash.tostring": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.padend/README.md b/lodash.padend/README.md
index 0cf079e5d..909eef8f2 100644
--- a/lodash.padend/README.md
+++ b/lodash.padend/README.md
@@ -1,4 +1,4 @@
-# lodash.padend v4.4.0
+# lodash.padend v4.5.0
 
 The [lodash](https://lodash.com/) method `_.padEnd` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var padEnd = require('lodash.padend');
 ```
 
-See the [documentation](https://lodash.com/docs#padEnd) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.padend) for more details.
+See the [documentation](https://lodash.com/docs#padEnd) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.padend) for more details.
diff --git a/lodash.padend/index.js b/lodash.padend/index.js
index 57837780e..5af50372e 100644
--- a/lodash.padend/index.js
+++ b/lodash.padend/index.js
@@ -1,5 +1,5 @@
 /**
- * lodash 4.4.0 (Custom Build) <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
  * Copyright jQuery Foundation and other contributors <https://jquery.org/>
  * Released under MIT license <https://lodash.com/license>
@@ -7,6 +7,7 @@
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
 var baseSlice = require('lodash._baseslice'),
+    baseToString = require('lodash._basetostring'),
     toString = require('lodash.tostring');
 
 /** Used as references for various `Number` constants. */
@@ -160,7 +161,7 @@ function castSlice(array, start, end) {
  * @returns {string} Returns the padding for `string`.
  */
 function createPadding(length, chars) {
-  chars = chars === undefined ? ' ' : (chars + '');
+  chars = chars === undefined ? ' ' : baseToString(chars);
 
   var charsLength = chars.length;
   if (charsLength < 2) {
@@ -279,6 +280,41 @@ function isSymbol(value) {
     (isObjectLike(value) && objectToString.call(value) == symbolTag);
 }
 
+/**
+ * Converts `value` to a finite number.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.12.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {number} Returns the converted number.
+ * @example
+ *
+ * _.toFinite(3.2);
+ * // => 3.2
+ *
+ * _.toFinite(Number.MIN_VALUE);
+ * // => 5e-324
+ *
+ * _.toFinite(Infinity);
+ * // => 1.7976931348623157e+308
+ *
+ * _.toFinite('3.2');
+ * // => 3.2
+ */
+function toFinite(value) {
+  if (!value) {
+    return value === 0 ? value : 0;
+  }
+  value = toNumber(value);
+  if (value === INFINITY || value === -INFINITY) {
+    var sign = (value < 0 ? -1 : 1);
+    return sign * MAX_INTEGER;
+  }
+  return value === value ? value : 0;
+}
+
 /**
  * Converts `value` to an integer.
  *
@@ -293,7 +329,7 @@ function isSymbol(value) {
  * @returns {number} Returns the converted integer.
  * @example
  *
- * _.toInteger(3);
+ * _.toInteger(3.2);
  * // => 3
  *
  * _.toInteger(Number.MIN_VALUE);
@@ -302,20 +338,14 @@ function isSymbol(value) {
  * _.toInteger(Infinity);
  * // => 1.7976931348623157e+308
  *
- * _.toInteger('3');
+ * _.toInteger('3.2');
  * // => 3
  */
 function toInteger(value) {
-  if (!value) {
-    return value === 0 ? value : 0;
-  }
-  value = toNumber(value);
-  if (value === INFINITY || value === -INFINITY) {
-    var sign = (value < 0 ? -1 : 1);
-    return sign * MAX_INTEGER;
-  }
-  var remainder = value % 1;
-  return value === value ? (remainder ? value - remainder : value) : 0;
+  var result = toFinite(value),
+      remainder = result % 1;
+
+  return result === result ? (remainder ? result - remainder : result) : 0;
 }
 
 /**
@@ -329,8 +359,8 @@ function toInteger(value) {
  * @returns {number} Returns the number.
  * @example
  *
- * _.toNumber(3);
- * // => 3
+ * _.toNumber(3.2);
+ * // => 3.2
  *
  * _.toNumber(Number.MIN_VALUE);
  * // => 5e-324
@@ -338,8 +368,8 @@ function toInteger(value) {
  * _.toNumber(Infinity);
  * // => Infinity
  *
- * _.toNumber('3');
- * // => 3
+ * _.toNumber('3.2');
+ * // => 3.2
  */
 function toNumber(value) {
   if (typeof value == 'number') {
diff --git a/lodash.padend/package.json b/lodash.padend/package.json
index 128cd15cf..283eee899 100644
--- a/lodash.padend/package.json
+++ b/lodash.padend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.padend",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.padEnd` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -16,6 +16,7 @@
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
     "lodash._baseslice": "~4.0.0",
+    "lodash._basetostring": "~4.12.0",
     "lodash.tostring": "^4.0.0"
   }
 }
diff --git a/lodash.padstart/README.md b/lodash.padstart/README.md
index a333f5221..bcc1c5aa6 100644
--- a/lodash.padstart/README.md
+++ b/lodash.padstart/README.md
@@ -1,4 +1,4 @@
-# lodash.padstart v4.4.0
+# lodash.padstart v4.5.0
 
 The [lodash](https://lodash.com/) method `_.padStart` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var padStart = require('lodash.padstart');
 ```
 
-See the [documentation](https://lodash.com/docs#padStart) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.padstart) for more details.
+See the [documentation](https://lodash.com/docs#padStart) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.padstart) for more details.
diff --git a/lodash.padstart/index.js b/lodash.padstart/index.js
index d96a7a67d..456889536 100644
--- a/lodash.padstart/index.js
+++ b/lodash.padstart/index.js
@@ -1,5 +1,5 @@
 /**
- * lodash 4.4.0 (Custom Build) <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
  * Copyright jQuery Foundation and other contributors <https://jquery.org/>
  * Released under MIT license <https://lodash.com/license>
@@ -7,6 +7,7 @@
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
 var baseSlice = require('lodash._baseslice'),
+    baseToString = require('lodash._basetostring'),
     toString = require('lodash.tostring');
 
 /** Used as references for various `Number` constants. */
@@ -160,7 +161,7 @@ function castSlice(array, start, end) {
  * @returns {string} Returns the padding for `string`.
  */
 function createPadding(length, chars) {
-  chars = chars === undefined ? ' ' : (chars + '');
+  chars = chars === undefined ? ' ' : baseToString(chars);
 
   var charsLength = chars.length;
   if (charsLength < 2) {
@@ -279,6 +280,41 @@ function isSymbol(value) {
     (isObjectLike(value) && objectToString.call(value) == symbolTag);
 }
 
+/**
+ * Converts `value` to a finite number.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.12.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {number} Returns the converted number.
+ * @example
+ *
+ * _.toFinite(3.2);
+ * // => 3.2
+ *
+ * _.toFinite(Number.MIN_VALUE);
+ * // => 5e-324
+ *
+ * _.toFinite(Infinity);
+ * // => 1.7976931348623157e+308
+ *
+ * _.toFinite('3.2');
+ * // => 3.2
+ */
+function toFinite(value) {
+  if (!value) {
+    return value === 0 ? value : 0;
+  }
+  value = toNumber(value);
+  if (value === INFINITY || value === -INFINITY) {
+    var sign = (value < 0 ? -1 : 1);
+    return sign * MAX_INTEGER;
+  }
+  return value === value ? value : 0;
+}
+
 /**
  * Converts `value` to an integer.
  *
@@ -293,7 +329,7 @@ function isSymbol(value) {
  * @returns {number} Returns the converted integer.
  * @example
  *
- * _.toInteger(3);
+ * _.toInteger(3.2);
  * // => 3
  *
  * _.toInteger(Number.MIN_VALUE);
@@ -302,20 +338,14 @@ function isSymbol(value) {
  * _.toInteger(Infinity);
  * // => 1.7976931348623157e+308
  *
- * _.toInteger('3');
+ * _.toInteger('3.2');
  * // => 3
  */
 function toInteger(value) {
-  if (!value) {
-    return value === 0 ? value : 0;
-  }
-  value = toNumber(value);
-  if (value === INFINITY || value === -INFINITY) {
-    var sign = (value < 0 ? -1 : 1);
-    return sign * MAX_INTEGER;
-  }
-  var remainder = value % 1;
-  return value === value ? (remainder ? value - remainder : value) : 0;
+  var result = toFinite(value),
+      remainder = result % 1;
+
+  return result === result ? (remainder ? result - remainder : result) : 0;
 }
 
 /**
@@ -329,8 +359,8 @@ function toInteger(value) {
  * @returns {number} Returns the number.
  * @example
  *
- * _.toNumber(3);
- * // => 3
+ * _.toNumber(3.2);
+ * // => 3.2
  *
  * _.toNumber(Number.MIN_VALUE);
  * // => 5e-324
@@ -338,8 +368,8 @@ function toInteger(value) {
  * _.toNumber(Infinity);
  * // => Infinity
  *
- * _.toNumber('3');
- * // => 3
+ * _.toNumber('3.2');
+ * // => 3.2
  */
 function toNumber(value) {
   if (typeof value == 'number') {
diff --git a/lodash.padstart/package.json b/lodash.padstart/package.json
index 9e0ce26c0..efe842d27 100644
--- a/lodash.padstart/package.json
+++ b/lodash.padstart/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.padstart",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.padStart` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -16,6 +16,7 @@
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
     "lodash._baseslice": "~4.0.0",
+    "lodash._basetostring": "~4.12.0",
     "lodash.tostring": "^4.0.0"
   }
 }
diff --git a/lodash.partition/README.md b/lodash.partition/README.md
index 7e8dccc41..0e3f58046 100644
--- a/lodash.partition/README.md
+++ b/lodash.partition/README.md
@@ -1,4 +1,4 @@
-# lodash.partition v4.4.0
+# lodash.partition v4.5.0
 
 The [lodash](https://lodash.com/) method `_.partition` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var partition = require('lodash.partition');
 ```
 
-See the [documentation](https://lodash.com/docs#partition) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.partition) for more details.
+See the [documentation](https://lodash.com/docs#partition) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.partition) for more details.
diff --git a/lodash.partition/index.js b/lodash.partition/index.js
index ade21ca5a..14a144bd0 100644
--- a/lodash.partition/index.js
+++ b/lodash.partition/index.js
@@ -6,14 +6,126 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseEach = require('lodash._baseeach'),
-    baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
 
 /**
  * A specialized version of `baseAggregator` for arrays.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} setter The function to set `accumulator` values.
  * @param {Function} iteratee The iteratee to transform keys.
  * @param {Object} accumulator The initial aggregated object.
@@ -21,7 +133,7 @@ var baseEach = require('lodash._baseeach'),
  */
 function arrayAggregator(array, setter, iteratee, accumulator) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     var value = array[index];
@@ -30,6 +142,678 @@ function arrayAggregator(array, setter, iteratee, accumulator) {
   return accumulator;
 }
 
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
 /**
  * Aggregates elements of `collection` on `accumulator` with keys transformed
  * by `iteratee` and values set by `setter`.
@@ -48,6 +832,381 @@ function baseAggregator(collection, setter, iteratee, accumulator) {
   return accumulator;
 }
 
+/**
+ * The base implementation of `_.forEach` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ */
+var baseEach = createBaseEach(baseForOwn);
+
+/**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
+
+/**
+ * The base implementation of `_.forOwn` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+function baseForOwn(object, iteratee) {
+  return object && baseFor(object, iteratee, keys);
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
 /**
  * Creates a function like `_.groupBy`.
  *
@@ -61,10 +1220,604 @@ function createAggregator(setter, initializer) {
     var func = isArray(collection) ? arrayAggregator : baseAggregator,
         accumulator = initializer ? initializer() : {};
 
-    return func(collection, setter, baseIteratee(iteratee), accumulator);
+    return func(collection, setter, baseIteratee(iteratee, 2), accumulator);
   };
 }
 
+/**
+ * Creates a `baseEach` or `baseEachRight` function.
+ *
+ * @private
+ * @param {Function} eachFunc The function to iterate over a collection.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseEach(eachFunc, fromRight) {
+  return function(collection, iteratee) {
+    if (collection == null) {
+      return collection;
+    }
+    if (!isArrayLike(collection)) {
+      return eachFunc(collection, iteratee);
+    }
+    var length = collection.length,
+        index = fromRight ? length : -1,
+        iterable = Object(collection);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (iteratee(iterable[index], index, iterable) === false) {
+        break;
+      }
+    }
+    return collection;
+  };
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Creates an array of elements split into two groups, the first of which
  * contains elements `predicate` returns truthy for, the second of which
@@ -76,8 +1829,7 @@ function createAggregator(setter, initializer) {
  * @since 3.0.0
  * @category Collection
  * @param {Array|Object} collection The collection to iterate over.
- * @param {Array|Function|Object|string} [predicate=_.identity]
- *  The function invoked per iteration.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
  * @returns {Array} Returns the array of grouped elements.
  * @example
  *
@@ -106,17 +1858,142 @@ var partition = createAggregator(function(result, value, key) {
   result[key ? 0 : 1].push(value);
 }, function() { return [[], []]; });
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -133,4 +2010,419 @@ var partition = createAggregator(function(result, value, key) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = partition;
diff --git a/lodash.partition/package.json b/lodash.partition/package.json
index 2bae5fb7a..bf9c9eb86 100644
--- a/lodash.partition/package.json
+++ b/lodash.partition/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.partition",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.partition` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseeach": "~4.1.0",
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.pickby/README.md b/lodash.pickby/README.md
index 1720df539..4c7314778 100644
--- a/lodash.pickby/README.md
+++ b/lodash.pickby/README.md
@@ -1,4 +1,4 @@
-# lodash.pickby v4.4.0
+# lodash.pickby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.pickBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var pickBy = require('lodash.pickby');
 ```
 
-See the [documentation](https://lodash.com/docs#pickBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.pickby) for more details.
+See the [documentation](https://lodash.com/docs#pickBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.pickby) for more details.
diff --git a/lodash.pickby/index.js b/lodash.pickby/index.js
index 419b04f03..62d75341f 100644
--- a/lodash.pickby/index.js
+++ b/lodash.pickby/index.js
@@ -6,8 +6,120 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseIteratee = require('lodash._baseiteratee'),
-    keysIn = require('lodash.keysin');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
 
 /**
  * Appends the elements of `values` to `array`.
@@ -28,11 +140,717 @@ function arrayPush(array, values) {
   return array;
 }
 
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `iterator` to an array.
+ *
+ * @private
+ * @param {Object} iterator The iterator to convert.
+ * @returns {Array} Returns the converted array.
+ */
+function iteratorToArray(iterator) {
+  var data,
+      result = [];
+
+  while (!(data = iterator.next()).done) {
+    result.push(data.value);
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
 /** Built-in value references. */
-var getOwnPropertySymbols = Object.getOwnPropertySymbols;
+var Reflect = root.Reflect,
+    Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    enumerate = Reflect ? Reflect.enumerate : undefined,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf;
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeGetSymbols = Object.getOwnPropertySymbols,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
 
 /**
  * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
@@ -50,17 +868,318 @@ function baseGetAllKeys(object, keysFunc, symbolsFunc) {
   return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
 }
 
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.keysIn` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+function baseKeysIn(object) {
+  object = object == null ? object : Object(object);
+
+  var result = [];
+  for (var key in object) {
+    result.push(key);
+  }
+  return result;
+}
+
+// Fallback for IE < 9 with es6-shim.
+if (enumerate && !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf')) {
+  baseKeysIn = function(object) {
+    return iteratorToArray(enumerate(object));
+  };
+}
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
 /**
  * The base implementation of  `_.pickBy` without support for iteratee shorthands.
  *
  * @private
  * @param {Object} object The source object.
+ * @param {string[]} props The property identifiers to pick from.
  * @param {Function} predicate The function invoked per property.
  * @returns {Object} Returns the new object.
  */
-function basePickBy(object, predicate) {
+function basePickBy(object, props, predicate) {
   var index = -1,
-      props = getAllKeysIn(object),
       length = props.length,
       result = {};
 
@@ -75,6 +1194,284 @@ function basePickBy(object, predicate) {
   return result;
 }
 
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
 /**
  * Creates an array of own and inherited enumerable property names and
  * symbols of `object`.
@@ -87,6 +1484,67 @@ function getAllKeysIn(object) {
   return baseGetAllKeys(object, keysIn, getSymbolsIn);
 }
 
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
 /**
  * Gets the `[[Prototype]]` of `value`.
  *
@@ -94,9 +1552,7 @@ function getAllKeysIn(object) {
  * @param {*} value The value to query.
  * @returns {null|Object} Returns the `[[Prototype]]`.
  */
-function getPrototype(value) {
-  return nativeGetPrototype(Object(value));
-}
+var getPrototype = overArg(nativeGetPrototype, Object);
 
 /**
  * Creates an array of the own enumerable symbol properties of `object`.
@@ -105,18 +1561,7 @@ function getPrototype(value) {
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of symbols.
  */
-function getSymbols(object) {
-  // Coerce `object` to an object to avoid non-object errors in V8.
-  // See https://bugs.chromium.org/p/v8/issues/detail?id=3443 for more details.
-  return getOwnPropertySymbols(Object(object));
-}
-
-// Fallback for IE < 11.
-if (!getOwnPropertySymbols) {
-  getSymbols = function() {
-    return [];
-  };
-}
+var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArray;
 
 /**
  * Creates an array of the own and inherited enumerable symbol properties
@@ -126,7 +1571,7 @@ if (!getOwnPropertySymbols) {
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of symbols.
  */
-var getSymbolsIn = !getOwnPropertySymbols ? getSymbols : function(object) {
+var getSymbolsIn = !nativeGetSymbols ? getSymbols : function(object) {
   var result = [];
   while (object) {
     arrayPush(result, getSymbols(object));
@@ -135,17 +1580,379 @@ var getSymbolsIn = !getOwnPropertySymbols ? getSymbols : function(object) {
   return result;
 };
 
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -162,6 +1969,418 @@ var getSymbolsIn = !getOwnPropertySymbols ? getSymbols : function(object) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * Creates an array of the own and inherited enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keysIn(new Foo);
+ * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
+ */
+function keysIn(object) {
+  var index = -1,
+      isProto = isPrototype(object),
+      props = baseKeysIn(object),
+      propsLength = props.length,
+      indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  while (++index < propsLength) {
+    var key = props[index];
+    if (!(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
 /**
  * Creates an object composed of the `object` properties `predicate` returns
  * truthy for. The predicate is invoked with two arguments: (value, key).
@@ -171,8 +2390,7 @@ var isArray = Array.isArray;
  * @since 4.0.0
  * @category Object
  * @param {Object} object The source object.
- * @param {Array|Function|Object|string} [predicate=_.identity]
- *  The function invoked per property.
+ * @param {Function} [predicate=_.identity] The function invoked per property.
  * @returns {Object} Returns the new object.
  * @example
  *
@@ -182,7 +2400,75 @@ var isArray = Array.isArray;
  * // => { 'a': 1, 'c': 3 }
  */
 function pickBy(object, predicate) {
-  return object == null ? {} : basePickBy(object, baseIteratee(predicate));
+  return object == null ? {} : basePickBy(object, getAllKeysIn(object), baseIteratee(predicate));
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
+/**
+ * This method returns a new empty array.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {Array} Returns the new empty array.
+ * @example
+ *
+ * var arrays = _.times(2, _.stubArray);
+ *
+ * console.log(arrays);
+ * // => [[], []]
+ *
+ * console.log(arrays[0] === arrays[1]);
+ * // => false
+ */
+function stubArray() {
+  return [];
 }
 
 module.exports = pickBy;
diff --git a/lodash.pickby/package.json b/lodash.pickby/package.json
index 1cc5e20c2..97222f6d6 100644
--- a/lodash.pickby/package.json
+++ b/lodash.pickby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.pickby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.pickBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseiteratee": "~4.7.0",
-    "lodash.keysin": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.pullallby/README.md b/lodash.pullallby/README.md
index 26978d13b..823c5b74a 100644
--- a/lodash.pullallby/README.md
+++ b/lodash.pullallby/README.md
@@ -1,4 +1,4 @@
-# lodash.pullallby v4.4.0
+# lodash.pullallby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.pullAllBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var pullAllBy = require('lodash.pullallby');
 ```
 
-See the [documentation](https://lodash.com/docs#pullAllBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.pullallby) for more details.
+See the [documentation](https://lodash.com/docs#pullAllBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.pullallby) for more details.
diff --git a/lodash.pullallby/index.js b/lodash.pullallby/index.js
index 8ec5bebca..599f6a615 100644
--- a/lodash.pullallby/index.js
+++ b/lodash.pullallby/index.js
@@ -1,5 +1,5 @@
 /**
- * lodash 4.4.0 (Custom Build) <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
  * Copyright jQuery Foundation and other contributors <https://jquery.org/>
  * Released under MIT license <https://lodash.com/license>
diff --git a/lodash.pullallby/package.json b/lodash.pullallby/package.json
index 06c5fa7a6..c7062768f 100644
--- a/lodash.pullallby/package.json
+++ b/lodash.pullallby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.pullallby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.pullAllBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -15,7 +15,7 @@
   "repository": "lodash/lodash",
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
-    "lodash._baseiteratee": "~4.6.0",
+    "lodash._baseiteratee": "~4.7.0",
     "lodash._basepullall": "~4.6.0"
   }
 }
diff --git a/lodash.pullat/README.md b/lodash.pullat/README.md
index 602030b0f..6a650ac5a 100644
--- a/lodash.pullat/README.md
+++ b/lodash.pullat/README.md
@@ -1,4 +1,4 @@
-# lodash.pullat v4.4.0
+# lodash.pullat v4.5.0
 
 The [lodash](https://lodash.com/) method `_.pullAt` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var pullAt = require('lodash.pullat');
 ```
 
-See the [documentation](https://lodash.com/docs#pullAt) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.pullat) for more details.
+See the [documentation](https://lodash.com/docs#pullAt) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.pullat) for more details.
diff --git a/lodash.pullat/index.js b/lodash.pullat/index.js
index 141d1c57e..9cf2de448 100644
--- a/lodash.pullat/index.js
+++ b/lodash.pullat/index.js
@@ -6,37 +6,84 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseFlatten = require('lodash._baseflatten'),
-    basePullAt = require('lodash._basepullat'),
-    rest = require('lodash.rest'),
-    stringToPath = require('lodash._stringtopath');
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
 /** Used as references for various `Number` constants. */
 var INFINITY = 1 / 0,
     MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
-var symbolTag = '[object Symbol]';
+var argsTag = '[object Arguments]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    symbolTag = '[object Symbol]';
 
 /** Used to match property names within property paths. */
 var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
-    reIsPlainProp = /^\w*$/;
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
 
 /** Used to detect unsigned integer values. */
 var reIsUint = /^(?:0|[1-9]\d*)$/;
 
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/**
+ * A faster alternative to `Function#apply`, this function invokes `func`
+ * with the `this` binding of `thisArg` and the arguments of `args`.
+ *
+ * @private
+ * @param {Function} func The function to invoke.
+ * @param {*} thisArg The `this` binding of `func`.
+ * @param {Array} args The arguments to invoke `func` with.
+ * @returns {*} Returns the result of `func`.
+ */
+function apply(func, thisArg, args) {
+  switch (args.length) {
+    case 0: return func.call(thisArg);
+    case 1: return func.call(thisArg, args[0]);
+    case 2: return func.call(thisArg, args[0], args[1]);
+    case 3: return func.call(thisArg, args[0], args[1], args[2]);
+  }
+  return func.apply(thisArg, args);
+}
+
 /**
  * A specialized version of `_.map` for arrays without support for iteratee
  * shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @returns {Array} Returns the new mapped array.
  */
 function arrayMap(array, iteratee) {
   var index = -1,
-      length = array.length,
+      length = array ? array.length : 0,
       result = Array(length);
 
   while (++index < length) {
@@ -45,8 +92,87 @@ function arrayMap(array, iteratee) {
   return result;
 }
 
+/**
+ * Appends the elements of `values` to `array`.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {Array} values The values to append.
+ * @returns {Array} Returns `array`.
+ */
+function arrayPush(array, values) {
+  var index = -1,
+      length = values.length,
+      offset = array.length;
+
+  while (++index < length) {
+    array[offset + index] = values[index];
+  }
+  return array;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
@@ -55,6 +181,351 @@ var objectProto = Object.prototype;
  */
 var objectToString = objectProto.toString;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice,
+    spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeMax = Math.max;
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
 /**
  * The base implementation of `_.at` without support for individual paths.
  *
@@ -75,6 +546,40 @@ function baseAt(object, paths) {
   return result;
 }
 
+/**
+ * The base implementation of `_.flatten` with support for restricting flattening.
+ *
+ * @private
+ * @param {Array} array The array to flatten.
+ * @param {number} depth The maximum recursion depth.
+ * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
+ * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
+ * @param {Array} [result=[]] The initial result value.
+ * @returns {Array} Returns the new flattened array.
+ */
+function baseFlatten(array, depth, predicate, isStrict, result) {
+  var index = -1,
+      length = array.length;
+
+  predicate || (predicate = isFlattenable);
+  result || (result = []);
+
+  while (++index < length) {
+    var value = array[index];
+    if (depth > 0 && predicate(value)) {
+      if (depth > 1) {
+        // Recursively flatten arrays (susceptible to call stack limits).
+        baseFlatten(value, depth - 1, predicate, isStrict, result);
+      } else {
+        arrayPush(result, value);
+      }
+    } else if (!isStrict) {
+      result[result.length] = value;
+    }
+  }
+  return result;
+}
+
 /**
  * The base implementation of `_.get` without support for default values.
  *
@@ -95,6 +600,137 @@ function baseGet(object, path) {
   return (index && index == length) ? object : undefined;
 }
 
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.pullAt` without support for individual
+ * indexes or capturing the removed elements.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {number[]} indexes The indexes of elements to remove.
+ * @returns {Array} Returns `array`.
+ */
+function basePullAt(array, indexes) {
+  var length = array ? indexes.length : 0,
+      lastIndex = length - 1;
+
+  while (length--) {
+    var index = indexes[length];
+    if (length == lastIndex || index !== previous) {
+      var previous = index;
+      if (isIndex(index)) {
+        splice.call(array, index, 1);
+      }
+      else if (!isKey(index, array)) {
+        var path = castPath(index),
+            object = parent(array, path);
+
+        if (object != null) {
+          delete object[toKey(last(path))];
+        }
+      }
+      else {
+        delete array[toKey(index)];
+      }
+    }
+  }
+  return array;
+}
+
+/**
+ * The base implementation of `_.rest` which doesn't validate or coerce arguments.
+ *
+ * @private
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @returns {Function} Returns the new function.
+ */
+function baseRest(func, start) {
+  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+  return function() {
+    var args = arguments,
+        index = -1,
+        length = nativeMax(args.length - start, 0),
+        array = Array(length);
+
+    while (++index < length) {
+      array[index] = args[start + index];
+    }
+    index = -1;
+    var otherArgs = Array(start + 1);
+    while (++index < start) {
+      otherArgs[index] = args[index];
+    }
+    otherArgs[start] = array;
+    return apply(func, this, otherArgs);
+  };
+}
+
+/**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+function baseSlice(array, start, end) {
+  var index = -1,
+      length = array.length;
+
+  if (start < 0) {
+    start = -start > length ? 0 : (length + start);
+  }
+  end = end > length ? length : end;
+  if (end < 0) {
+    end += length;
+  }
+  length = start > end ? 0 : ((end - start) >>> 0);
+  start >>>= 0;
+
+  var result = Array(length);
+  while (++index < length) {
+    result[index] = array[index + start];
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Casts `value` to a path array if it's not one.
  *
@@ -144,6 +780,59 @@ function compareAscending(value, other) {
   return 0;
 }
 
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Checks if `value` is a flattenable `arguments` object or array.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
+ */
+function isFlattenable(value) {
+  return isArray(value) || isArguments(value) ||
+    !!(spreadableSymbol && value && value[spreadableSymbol])
+}
+
 /**
  * Checks if `value` is a valid array-like index.
  *
@@ -180,6 +869,58 @@ function isKey(value, object) {
     (object != null && value in Object(object));
 }
 
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Gets the parent value at `path` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array} path The path to get the parent value of.
+ * @returns {*} Returns the parent value.
+ */
+function parent(object, path) {
+  return path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
 /**
  * Converts `value` to a string key if it's not a string or symbol.
  *
@@ -195,6 +936,44 @@ function toKey(value) {
   return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
 }
 
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Gets the last element of `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Array
+ * @param {Array} array The array to query.
+ * @returns {*} Returns the last element of `array`.
+ * @example
+ *
+ * _.last([1, 2, 3]);
+ * // => 3
+ */
+function last(array) {
+  var length = array ? array.length : 0;
+  return length ? array[length - 1] : undefined;
+}
+
 /**
  * Removes elements from `array` corresponding to `indexes` and returns an
  * array of removed elements.
@@ -210,16 +989,16 @@ function toKey(value) {
  * @returns {Array} Returns the new array of removed elements.
  * @example
  *
- * var array = [5, 10, 15, 20];
- * var evens = _.pullAt(array, 1, 3);
+ * var array = ['a', 'b', 'c', 'd'];
+ * var pulled = _.pullAt(array, [1, 3]);
  *
  * console.log(array);
- * // => [5, 15]
+ * // => ['a', 'c']
  *
- * console.log(evens);
- * // => [10, 20]
+ * console.log(pulled);
+ * // => ['b', 'd']
  */
-var pullAt = rest(function(array, indexes) {
+var pullAt = baseRest(function(array, indexes) {
   indexes = baseFlatten(indexes, 1);
 
   var length = array ? array.length : 0,
@@ -232,17 +1011,142 @@ var pullAt = rest(function(array, indexes) {
   return result;
 });
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -259,6 +1163,151 @@ var pullAt = rest(function(array, indexes) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
 /**
  * Checks if `value` is object-like. A value is object-like if it's not `null`
  * and has a `typeof` result of "object".
@@ -295,8 +1344,7 @@ function isObjectLike(value) {
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  * @example
  *
  * _.isSymbol(Symbol.iterator);
@@ -310,9 +1358,34 @@ function isSymbol(value) {
     (isObjectLike(value) && objectToString.call(value) == symbolTag);
 }
 
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
 /**
  * Gets the value at `path` of `object`. If the resolved value is
- * `undefined`, the `defaultValue` is used in its place.
+ * `undefined`, the `defaultValue` is returned in its place.
  *
  * @static
  * @memberOf _
diff --git a/lodash.pullat/package.json b/lodash.pullat/package.json
index 4dd43f95b..c43314adf 100644
--- a/lodash.pullat/package.json
+++ b/lodash.pullat/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.pullat",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.pullAt` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,11 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseflatten": "~4.2.0",
-    "lodash._basepullat": "~4.4.0",
-    "lodash._stringtopath": "~4.8.0",
-    "lodash.rest": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.reduce/README.md b/lodash.reduce/README.md
index 4bcd312a6..8802ee862 100644
--- a/lodash.reduce/README.md
+++ b/lodash.reduce/README.md
@@ -1,4 +1,4 @@
-# lodash.reduce v4.4.0
+# lodash.reduce v4.5.0
 
 The [lodash](https://lodash.com/) method `_.reduce` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var reduce = require('lodash.reduce');
 ```
 
-See the [documentation](https://lodash.com/docs#reduce) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.reduce) for more details.
+See the [documentation](https://lodash.com/docs#reduce) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.reduce) for more details.
diff --git a/lodash.reduce/index.js b/lodash.reduce/index.js
index 5a0647a6e..5d23cfe18 100644
--- a/lodash.reduce/index.js
+++ b/lodash.reduce/index.js
@@ -6,16 +6,127 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseEach = require('lodash._baseeach'),
-    baseIteratee = require('lodash._baseiteratee'),
-    baseReduce = require('lodash._basereduce');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
 
 /**
  * A specialized version of `_.reduce` for arrays without support for
  * iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @param {*} [accumulator] The initial value.
  * @param {boolean} [initAccum] Specify using the first element of `array` as
@@ -24,7 +135,7 @@ var baseEach = require('lodash._baseeach'),
  */
 function arrayReduce(array, iteratee, accumulator, initAccum) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   if (initAccum && length) {
     accumulator = array[++index];
@@ -35,6 +146,1669 @@ function arrayReduce(array, iteratee, accumulator, initAccum) {
   return accumulator;
 }
 
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.reduce` and `_.reduceRight`, without support
+ * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {*} accumulator The initial value.
+ * @param {boolean} initAccum Specify using the first or last element of
+ *  `collection` as the initial value.
+ * @param {Function} eachFunc The function to iterate over `collection`.
+ * @returns {*} Returns the accumulated value.
+ */
+function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
+  eachFunc(collection, function(value, index, collection) {
+    accumulator = initAccum
+      ? (initAccum = false, value)
+      : iteratee(accumulator, value, index, collection);
+  });
+  return accumulator;
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.forEach` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ */
+var baseEach = createBaseEach(baseForOwn);
+
+/**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
+
+/**
+ * The base implementation of `_.forOwn` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+function baseForOwn(object, iteratee) {
+  return object && baseFor(object, iteratee, keys);
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * Creates a `baseEach` or `baseEachRight` function.
+ *
+ * @private
+ * @param {Function} eachFunc The function to iterate over a collection.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseEach(eachFunc, fromRight) {
+  return function(collection, iteratee) {
+    if (collection == null) {
+      return collection;
+    }
+    if (!isArrayLike(collection)) {
+      return eachFunc(collection, iteratee);
+    }
+    var length = collection.length,
+        index = fromRight ? length : -1,
+        iterable = Object(collection);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (iteratee(iterable[index], index, iterable) === false) {
+        break;
+      }
+    }
+    return collection;
+  };
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Reduces `collection` to a value which is the accumulated result of running
  * each element in `collection` thru `iteratee`, where each successive
@@ -79,17 +1853,142 @@ function reduce(collection, iteratee, accumulator) {
   return func(collection, baseIteratee(iteratee, 4), accumulator, initAccum, baseEach);
 }
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -106,4 +2005,419 @@ function reduce(collection, iteratee, accumulator) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = reduce;
diff --git a/lodash.reduce/package.json b/lodash.reduce/package.json
index e33fffadf..80b561284 100644
--- a/lodash.reduce/package.json
+++ b/lodash.reduce/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.reduce",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.reduce` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseeach": "~4.1.0",
-    "lodash._baseiteratee": "~4.7.0",
-    "lodash._basereduce": "~3.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.reduceright/README.md b/lodash.reduceright/README.md
index eaf7ad2c7..8467d1090 100644
--- a/lodash.reduceright/README.md
+++ b/lodash.reduceright/README.md
@@ -1,4 +1,4 @@
-# lodash.reduceright v4.4.0
+# lodash.reduceright v4.5.0
 
 The [lodash](https://lodash.com/) method `_.reduceRight` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var reduceRight = require('lodash.reduceright');
 ```
 
-See the [documentation](https://lodash.com/docs#reduceRight) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.reduceright) for more details.
+See the [documentation](https://lodash.com/docs#reduceRight) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.reduceright) for more details.
diff --git a/lodash.reduceright/index.js b/lodash.reduceright/index.js
index a3365a79e..1e9203a28 100644
--- a/lodash.reduceright/index.js
+++ b/lodash.reduceright/index.js
@@ -6,16 +6,127 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseEachRight = require('lodash._baseeachright'),
-    baseIteratee = require('lodash._baseiteratee'),
-    baseReduce = require('lodash._basereduce');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
 
 /**
  * A specialized version of `_.reduceRight` for arrays without support for
  * iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @param {*} [accumulator] The initial value.
  * @param {boolean} [initAccum] Specify using the last element of `array` as
@@ -23,7 +134,7 @@ var baseEachRight = require('lodash._baseeachright'),
  * @returns {*} Returns the accumulated value.
  */
 function arrayReduceRight(array, iteratee, accumulator, initAccum) {
-  var length = array.length;
+  var length = array ? array.length : 0;
   if (initAccum && length) {
     accumulator = array[--length];
   }
@@ -33,6 +144,1668 @@ function arrayReduceRight(array, iteratee, accumulator, initAccum) {
   return accumulator;
 }
 
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.reduce` and `_.reduceRight`, without support
+ * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {*} accumulator The initial value.
+ * @param {boolean} initAccum Specify using the first or last element of
+ *  `collection` as the initial value.
+ * @param {Function} eachFunc The function to iterate over `collection`.
+ * @returns {*} Returns the accumulated value.
+ */
+function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
+  eachFunc(collection, function(value, index, collection) {
+    accumulator = initAccum
+      ? (initAccum = false, value)
+      : iteratee(accumulator, value, index, collection);
+  });
+  return accumulator;
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.forEachRight` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ */
+var baseEachRight = createBaseEach(baseForOwnRight, true);
+
+/**
+ * This function is like `baseFor` except that it iterates over properties
+ * in the opposite order.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseForRight = createBaseFor(true);
+
+/**
+ * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+function baseForOwnRight(object, iteratee) {
+  return object && baseForRight(object, iteratee, keys);
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * Creates a `baseEach` or `baseEachRight` function.
+ *
+ * @private
+ * @param {Function} eachFunc The function to iterate over a collection.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseEach(eachFunc, fromRight) {
+  return function(collection, iteratee) {
+    if (collection == null) {
+      return collection;
+    }
+    if (!isArrayLike(collection)) {
+      return eachFunc(collection, iteratee);
+    }
+    var length = collection.length,
+        index = fromRight ? length : -1,
+        iterable = Object(collection);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (iteratee(iterable[index], index, iterable) === false) {
+        break;
+      }
+    }
+    return collection;
+  };
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * This method is like `_.reduce` except that it iterates over elements of
  * `collection` from right to left.
@@ -62,17 +1835,142 @@ function reduceRight(collection, iteratee, accumulator) {
   return func(collection, baseIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
 }
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -89,4 +1987,419 @@ function reduceRight(collection, iteratee, accumulator) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = reduceRight;
diff --git a/lodash.reduceright/package.json b/lodash.reduceright/package.json
index e2d30592f..54a6acad8 100644
--- a/lodash.reduceright/package.json
+++ b/lodash.reduceright/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.reduceright",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.reduceRight` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseeachright": "~4.1.0",
-    "lodash._baseiteratee": "~4.7.0",
-    "lodash._basereduce": "~3.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.reject/README.md b/lodash.reject/README.md
index 77b676246..c717d956f 100644
--- a/lodash.reject/README.md
+++ b/lodash.reject/README.md
@@ -1,4 +1,4 @@
-# lodash.reject v4.4.0
+# lodash.reject v4.5.0
 
 The [lodash](https://lodash.com/) method `_.reject` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var reject = require('lodash.reject');
 ```
 
-See the [documentation](https://lodash.com/docs#reject) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.reject) for more details.
+See the [documentation](https://lodash.com/docs#reject) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.reject) for more details.
diff --git a/lodash.reject/index.js b/lodash.reject/index.js
index 37b71ee76..fc60b6d63 100644
--- a/lodash.reject/index.js
+++ b/lodash.reject/index.js
@@ -6,21 +6,133 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseFilter = require('lodash._basefilter'),
-    baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
 
 /**
  * A specialized version of `_.filter` for arrays without support for
  * iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} predicate The function invoked per iteration.
  * @returns {Array} Returns the new filtered array.
  */
 function arrayFilter(array, predicate) {
   var index = -1,
-      length = array.length,
+      length = array ? array.length : 0,
       resIndex = 0,
       result = [];
 
@@ -33,6 +145,1665 @@ function arrayFilter(array, predicate) {
   return result;
 }
 
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.forEach` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ */
+var baseEach = createBaseEach(baseForOwn);
+
+/**
+ * The base implementation of `_.filter` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {Array} Returns the new filtered array.
+ */
+function baseFilter(collection, predicate) {
+  var result = [];
+  baseEach(collection, function(value, index, collection) {
+    if (predicate(value, index, collection)) {
+      result.push(value);
+    }
+  });
+  return result;
+}
+
+/**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
+
+/**
+ * The base implementation of `_.forOwn` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+function baseForOwn(object, iteratee) {
+  return object && baseFor(object, iteratee, keys);
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * Creates a `baseEach` or `baseEachRight` function.
+ *
+ * @private
+ * @param {Function} eachFunc The function to iterate over a collection.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseEach(eachFunc, fromRight) {
+  return function(collection, iteratee) {
+    if (collection == null) {
+      return collection;
+    }
+    if (!isArrayLike(collection)) {
+      return eachFunc(collection, iteratee);
+    }
+    var length = collection.length,
+        index = fromRight ? length : -1,
+        iterable = Object(collection);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (iteratee(iterable[index], index, iterable) === false) {
+        break;
+      }
+    }
+    return collection;
+  };
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * The opposite of `_.filter`; this method returns the elements of `collection`
  * that `predicate` does **not** return truthy for.
@@ -42,8 +1813,7 @@ function arrayFilter(array, predicate) {
  * @since 0.1.0
  * @category Collection
  * @param {Array|Object} collection The collection to iterate over.
- * @param {Array|Function|Object|string} [predicate=_.identity]
- *  The function invoked per iteration.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
  * @returns {Array} Returns the new filtered array.
  * @see _.filter
  * @example
@@ -70,10 +1840,170 @@ function arrayFilter(array, predicate) {
  */
 function reject(collection, predicate) {
   var func = isArray(collection) ? arrayFilter : baseFilter;
-  predicate = baseIteratee(predicate, 3);
-  return func(collection, function(value, index, collection) {
-    return !predicate(value, index, collection);
-  });
+  return func(collection, negate(baseIteratee(predicate, 3)));
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Creates a function that negates the result of the predicate `func`. The
+ * `func` predicate is invoked with the `this` binding and arguments of the
+ * created function.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Function
+ * @param {Function} predicate The predicate to negate.
+ * @returns {Function} Returns the new negated function.
+ * @example
+ *
+ * function isEven(n) {
+ *   return n % 2 == 0;
+ * }
+ *
+ * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
+ * // => [1, 3, 5]
+ */
+function negate(predicate) {
+  if (typeof predicate != 'function') {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  return function() {
+    var args = arguments;
+    switch (args.length) {
+      case 0: return !predicate.call(this);
+      case 1: return !predicate.call(this, args[0]);
+      case 2: return !predicate.call(this, args[0], args[1]);
+      case 3: return !predicate.call(this, args[0], args[1], args[2]);
+    }
+    return !predicate.apply(this, args);
+  };
+}
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
 
 /**
@@ -82,11 +2012,9 @@ function reject(collection, predicate) {
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -103,4 +2031,419 @@ function reject(collection, predicate) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = reject;
diff --git a/lodash.reject/package.json b/lodash.reject/package.json
index 060c7307e..f7b1898a3 100644
--- a/lodash.reject/package.json
+++ b/lodash.reject/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.reject",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.reject` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._basefilter": "~4.0.0",
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.remove/README.md b/lodash.remove/README.md
index b2728deaf..3985142ad 100644
--- a/lodash.remove/README.md
+++ b/lodash.remove/README.md
@@ -1,4 +1,4 @@
-# lodash.remove v4.4.0
+# lodash.remove v4.5.0
 
 The [lodash](https://lodash.com/) method `_.remove` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var remove = require('lodash.remove');
 ```
 
-See the [documentation](https://lodash.com/docs#remove) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.remove) for more details.
+See the [documentation](https://lodash.com/docs#remove) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.remove) for more details.
diff --git a/lodash.remove/package.json b/lodash.remove/package.json
index d79951230..0840f81b2 100644
--- a/lodash.remove/package.json
+++ b/lodash.remove/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.remove",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.remove` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -15,7 +15,7 @@
   "repository": "lodash/lodash",
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
-    "lodash._baseiteratee": "~4.6.0",
+    "lodash._baseiteratee": "~4.7.0",
     "lodash._basepullat": "~4.4.0"
   }
 }
diff --git a/lodash.result/README.md b/lodash.result/README.md
index b2de97f62..fca9c1144 100644
--- a/lodash.result/README.md
+++ b/lodash.result/README.md
@@ -1,4 +1,4 @@
-# lodash.result v4.4.0
+# lodash.result v4.5.0
 
 The [lodash](https://lodash.com/) method `_.result` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var result = require('lodash.result');
 ```
 
-See the [documentation](https://lodash.com/docs#result) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.result) for more details.
+See the [documentation](https://lodash.com/docs#result) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.result) for more details.
diff --git a/lodash.result/index.js b/lodash.result/index.js
index 165538a51..b725fe822 100644
--- a/lodash.result/index.js
+++ b/lodash.result/index.js
@@ -6,7 +6,12 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var stringToPath = require('lodash._stringtopath');
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
 /** Used as references for various `Number` constants. */
 var INFINITY = 1 / 0;
@@ -18,10 +23,79 @@ var funcTag = '[object Function]',
 
 /** Used to match property names within property paths. */
 var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
-    reIsPlainProp = /^\w*$/;
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
 
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
@@ -30,6 +104,382 @@ var objectProto = Object.prototype;
  */
 var objectToString = objectProto.toString;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    splice = arrayProto.splice;
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Casts `value` to a path array if it's not one.
  *
@@ -41,6 +491,34 @@ function castPath(value) {
   return isArray(value) ? value : stringToPath(value);
 }
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
 /**
  * Checks if `value` is a property name and not a property path.
  *
@@ -62,6 +540,46 @@ function isKey(value, object) {
     (object != null && value in Object(object));
 }
 
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
 /**
  * Converts `value` to a string key if it's not a string or symbol.
  *
@@ -77,17 +595,137 @@ function toKey(value) {
   return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
 }
 
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -112,8 +750,7 @@ var isArray = Array.isArray;
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -196,8 +833,7 @@ function isObjectLike(value) {
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  * @example
  *
  * _.isSymbol(Symbol.iterator);
@@ -211,6 +847,31 @@ function isSymbol(value) {
     (isObjectLike(value) && objectToString.call(value) == symbolTag);
 }
 
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
 /**
  * This method is like `_.get` except that if the resolved value is a
  * function it's invoked with the `this` binding of its parent object and
diff --git a/lodash.result/package.json b/lodash.result/package.json
index db0437869..a54d1c659 100644
--- a/lodash.result/package.json
+++ b/lodash.result/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.result",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.result` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,8 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._stringtopath": "~4.8.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.some/README.md b/lodash.some/README.md
index cfb2ab387..7e8071a2e 100644
--- a/lodash.some/README.md
+++ b/lodash.some/README.md
@@ -1,4 +1,4 @@
-# lodash.some v4.4.0
+# lodash.some v4.5.0
 
 The [lodash](https://lodash.com/) method `_.some` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var some = require('lodash.some');
 ```
 
-See the [documentation](https://lodash.com/docs#some) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.some) for more details.
+See the [documentation](https://lodash.com/docs#some) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.some) for more details.
diff --git a/lodash.some/index.js b/lodash.some/index.js
index e59d64d88..9a1210082 100644
--- a/lodash.some/index.js
+++ b/lodash.some/index.js
@@ -6,32 +6,134 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseEach = require('lodash._baseeach'),
-    baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
 
 /** Used as references for various `Number` constants. */
-var MAX_SAFE_INTEGER = 9007199254740991;
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
-var funcTag = '[object Function]',
-    genTag = '[object GeneratorFunction]';
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
 
 /** Used to detect unsigned integer values. */
 var reIsUint = /^(?:0|[1-9]\d*)$/;
 
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
 /**
  * A specialized version of `_.some` for arrays without support for iteratee
  * shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} predicate The function invoked per iteration.
  * @returns {boolean} Returns `true` if any element passes the predicate check,
  *  else `false`.
  */
 function arraySome(array, predicate) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     if (predicate(array[index], index, array)) {
@@ -41,16 +143,6 @@ function arraySome(array, predicate) {
   return false;
 }
 
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
-
-/**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
- * of values.
- */
-var objectToString = objectProto.toString;
-
 /**
  * The base implementation of `_.property` without support for deep paths.
  *
@@ -64,6 +156,987 @@ function baseProperty(key) {
   };
 }
 
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.forEach` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ */
+var baseEach = createBaseEach(baseForOwn);
+
+/**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
+
+/**
+ * The base implementation of `_.forOwn` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+function baseForOwn(object, iteratee) {
+  return object && baseFor(object, iteratee, keys);
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
 /**
  * The base implementation of `_.some` without support for iteratee shorthands.
  *
@@ -83,6 +1156,324 @@ function baseSome(collection, predicate) {
   return !!result;
 }
 
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * Creates a `baseEach` or `baseEachRight` function.
+ *
+ * @private
+ * @param {Function} eachFunc The function to iterate over a collection.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseEach(eachFunc, fromRight) {
+  return function(collection, iteratee) {
+    if (collection == null) {
+      return collection;
+    }
+    if (!isArrayLike(collection)) {
+      return eachFunc(collection, iteratee);
+    }
+    var length = collection.length,
+        index = fromRight ? length : -1,
+        iterable = Object(collection);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (iteratee(iterable[index], index, iterable) === false) {
+        break;
+      }
+    }
+    return collection;
+  };
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
 /**
  * Gets the "length" property value of `object`.
  *
@@ -96,6 +1487,145 @@ function baseSome(collection, predicate) {
  */
 var getLength = baseProperty('length');
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
 /**
  * Checks if `value` is a valid array-like index.
  *
@@ -135,6 +1665,146 @@ function isIterateeCall(value, index, object) {
   return false;
 }
 
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Checks if `predicate` returns truthy for **any** element of `collection`.
  * Iteration is stopped once `predicate` returns truthy. The predicate is
@@ -145,8 +1815,7 @@ function isIterateeCall(value, index, object) {
  * @since 0.1.0
  * @category Collection
  * @param {Array|Object} collection The collection to iterate over.
- * @param {Array|Function|Object|string} [predicate=_.identity]
- *  The function invoked per iteration.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
  * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  * @returns {boolean} Returns `true` if any element passes the predicate check,
  *  else `false`.
@@ -180,6 +1849,73 @@ function some(collection, predicate, guard) {
   return func(collection, baseIteratee(predicate, 3));
 }
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
 /**
  * Performs a
  * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
@@ -194,8 +1930,8 @@ function some(collection, predicate, guard) {
  * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  * @example
  *
- * var object = { 'user': 'fred' };
- * var other = { 'user': 'fred' };
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
  *
  * _.eq(object, object);
  * // => true
@@ -216,17 +1952,39 @@ function eq(value, other) {
   return value === other || (value !== value && other !== other);
 }
 
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -272,6 +2030,35 @@ function isArrayLike(value) {
   return value != null && isLength(getLength(value)) && !isFunction(value);
 }
 
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
 /**
  * Checks if `value` is classified as a `Function` object.
  *
@@ -280,8 +2067,7 @@ function isArrayLike(value) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -360,4 +2146,274 @@ function isObject(value) {
   return !!value && (type == 'object' || type == 'function');
 }
 
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = some;
diff --git a/lodash.some/package.json b/lodash.some/package.json
index 92b7a8418..3c9fa909b 100644
--- a/lodash.some/package.json
+++ b/lodash.some/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.some",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.some` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseeach": "~4.1.0",
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.sortby/README.md b/lodash.sortby/README.md
index c9a66a635..fcac265b3 100644
--- a/lodash.sortby/README.md
+++ b/lodash.sortby/README.md
@@ -1,4 +1,4 @@
-# lodash.sortby v4.4.3
+# lodash.sortby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.sortBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var sortBy = require('lodash.sortby');
 ```
 
-See the [documentation](https://lodash.com/docs#sortBy) or [package source](https://github.com/lodash/lodash/blob/4.4.3-npm-packages/lodash.sortby) for more details.
+See the [documentation](https://lodash.com/docs#sortBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.sortby) for more details.
diff --git a/lodash.sortby/package.json b/lodash.sortby/package.json
index d7d02b25b..8bb3900e2 100644
--- a/lodash.sortby/package.json
+++ b/lodash.sortby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.sortby",
-  "version": "4.4.3",
+  "version": "4.5.0",
   "description": "The lodash method `_.sortBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -17,7 +17,7 @@
   "dependencies": {
     "lodash._baseeach": "~4.1.0",
     "lodash._baseflatten": "~4.2.0",
-    "lodash._baseiteratee": "~4.6.0",
+    "lodash._baseiteratee": "~4.7.0",
     "lodash.rest": "^4.0.0"
   }
 }
diff --git a/lodash.sortedindexby/README.md b/lodash.sortedindexby/README.md
index 030c5180b..7b50fc20d 100644
--- a/lodash.sortedindexby/README.md
+++ b/lodash.sortedindexby/README.md
@@ -1,4 +1,4 @@
-# lodash.sortedindexby v4.4.0
+# lodash.sortedindexby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.sortedIndexBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var sortedIndexBy = require('lodash.sortedindexby');
 ```
 
-See the [documentation](https://lodash.com/docs#sortedIndexBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.sortedindexby) for more details.
+See the [documentation](https://lodash.com/docs#sortedIndexBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.sortedindexby) for more details.
diff --git a/lodash.sortedindexby/index.js b/lodash.sortedindexby/index.js
index 0490ce368..774e9805a 100644
--- a/lodash.sortedindexby/index.js
+++ b/lodash.sortedindexby/index.js
@@ -6,8 +6,1732 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseIteratee = require('lodash._baseiteratee'),
-    baseSortedIndexBy = require('lodash._basesortedindexby');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** Used as references for the maximum length and index of an array. */
+var MAX_ARRAY_LENGTH = 4294967295,
+    MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeFloor = Math.floor,
+    nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys,
+    nativeMin = Math.min;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
+ * which invokes `iteratee` for `value` and each element of `array` to compute
+ * their sort ranking. The iteratee is invoked with one argument; (value).
+ *
+ * @private
+ * @param {Array} array The sorted array to inspect.
+ * @param {*} value The value to evaluate.
+ * @param {Function} iteratee The iteratee invoked per element.
+ * @param {boolean} [retHighest] Specify returning the highest qualified index.
+ * @returns {number} Returns the index at which `value` should be inserted
+ *  into `array`.
+ */
+function baseSortedIndexBy(array, value, iteratee, retHighest) {
+  value = iteratee(value);
+
+  var low = 0,
+      high = array ? array.length : 0,
+      valIsNaN = value !== value,
+      valIsNull = value === null,
+      valIsSymbol = isSymbol(value),
+      valIsUndefined = value === undefined;
+
+  while (low < high) {
+    var mid = nativeFloor((low + high) / 2),
+        computed = iteratee(array[mid]),
+        othIsDefined = computed !== undefined,
+        othIsNull = computed === null,
+        othIsReflexive = computed === computed,
+        othIsSymbol = isSymbol(computed);
+
+    if (valIsNaN) {
+      var setLow = retHighest || othIsReflexive;
+    } else if (valIsUndefined) {
+      setLow = othIsReflexive && (retHighest || othIsDefined);
+    } else if (valIsNull) {
+      setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
+    } else if (valIsSymbol) {
+      setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
+    } else if (othIsNull || othIsSymbol) {
+      setLow = false;
+    } else {
+      setLow = retHighest ? (computed <= value) : (computed < value);
+    }
+    if (setLow) {
+      low = mid + 1;
+    } else {
+      high = mid;
+    }
+  }
+  return nativeMin(high, MAX_ARRAY_INDEX);
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
 
 /**
  * This method is like `_.sortedIndex` except that it accepts `iteratee`
@@ -20,23 +1744,590 @@ var baseIteratee = require('lodash._baseiteratee'),
  * @category Array
  * @param {Array} array The sorted array to inspect.
  * @param {*} value The value to evaluate.
- * @param {Array|Function|Object|string} [iteratee=_.identity]
+ * @param {Function} [iteratee=_.identity]
  *  The iteratee invoked per element.
  * @returns {number} Returns the index at which `value` should be inserted
  *  into `array`.
  * @example
  *
- * var dict = { 'thirty': 30, 'forty': 40, 'fifty': 50 };
+ * var objects = [{ 'x': 4 }, { 'x': 5 }];
  *
- * _.sortedIndexBy(['thirty', 'fifty'], 'forty', _.propertyOf(dict));
- * // => 1
+ * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+ * // => 0
  *
  * // The `_.property` iteratee shorthand.
- * _.sortedIndexBy([{ 'x': 4 }, { 'x': 5 }], { 'x': 4 }, 'x');
+ * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
  * // => 0
  */
 function sortedIndexBy(array, value, iteratee) {
-  return baseSortedIndexBy(array, value, baseIteratee(iteratee));
+  return baseSortedIndexBy(array, value, baseIteratee(iteratee, 2));
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
 }
 
 module.exports = sortedIndexBy;
diff --git a/lodash.sortedindexby/package.json b/lodash.sortedindexby/package.json
index 40b4a8399..a17c179a7 100644
--- a/lodash.sortedindexby/package.json
+++ b/lodash.sortedindexby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.sortedindexby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.sortedIndexBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseiteratee": "~4.7.0",
-    "lodash._basesortedindexby": "~4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.sortedlastindexby/README.md b/lodash.sortedlastindexby/README.md
index f35caf1af..06eb92d5e 100644
--- a/lodash.sortedlastindexby/README.md
+++ b/lodash.sortedlastindexby/README.md
@@ -1,4 +1,4 @@
-# lodash.sortedlastindexby v4.4.0
+# lodash.sortedlastindexby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.sortedLastIndexBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var sortedLastIndexBy = require('lodash.sortedlastindexby');
 ```
 
-See the [documentation](https://lodash.com/docs#sortedLastIndexBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.sortedlastindexby) for more details.
+See the [documentation](https://lodash.com/docs#sortedLastIndexBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.sortedlastindexby) for more details.
diff --git a/lodash.sortedlastindexby/index.js b/lodash.sortedlastindexby/index.js
index c399f8033..8e14e22da 100644
--- a/lodash.sortedlastindexby/index.js
+++ b/lodash.sortedlastindexby/index.js
@@ -6,8 +6,1732 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseIteratee = require('lodash._baseiteratee'),
-    baseSortedIndexBy = require('lodash._basesortedindexby');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** Used as references for the maximum length and index of an array. */
+var MAX_ARRAY_LENGTH = 4294967295,
+    MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeFloor = Math.floor,
+    nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys,
+    nativeMin = Math.min;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
+ * which invokes `iteratee` for `value` and each element of `array` to compute
+ * their sort ranking. The iteratee is invoked with one argument; (value).
+ *
+ * @private
+ * @param {Array} array The sorted array to inspect.
+ * @param {*} value The value to evaluate.
+ * @param {Function} iteratee The iteratee invoked per element.
+ * @param {boolean} [retHighest] Specify returning the highest qualified index.
+ * @returns {number} Returns the index at which `value` should be inserted
+ *  into `array`.
+ */
+function baseSortedIndexBy(array, value, iteratee, retHighest) {
+  value = iteratee(value);
+
+  var low = 0,
+      high = array ? array.length : 0,
+      valIsNaN = value !== value,
+      valIsNull = value === null,
+      valIsSymbol = isSymbol(value),
+      valIsUndefined = value === undefined;
+
+  while (low < high) {
+    var mid = nativeFloor((low + high) / 2),
+        computed = iteratee(array[mid]),
+        othIsDefined = computed !== undefined,
+        othIsNull = computed === null,
+        othIsReflexive = computed === computed,
+        othIsSymbol = isSymbol(computed);
+
+    if (valIsNaN) {
+      var setLow = retHighest || othIsReflexive;
+    } else if (valIsUndefined) {
+      setLow = othIsReflexive && (retHighest || othIsDefined);
+    } else if (valIsNull) {
+      setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
+    } else if (valIsSymbol) {
+      setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
+    } else if (othIsNull || othIsSymbol) {
+      setLow = false;
+    } else {
+      setLow = retHighest ? (computed <= value) : (computed < value);
+    }
+    if (setLow) {
+      low = mid + 1;
+    } else {
+      high = mid;
+    }
+  }
+  return nativeMin(high, MAX_ARRAY_INDEX);
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
 
 /**
  * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
@@ -20,18 +1744,590 @@ var baseIteratee = require('lodash._baseiteratee'),
  * @category Array
  * @param {Array} array The sorted array to inspect.
  * @param {*} value The value to evaluate.
- * @param {Array|Function|Object|string} [iteratee=_.identity]
+ * @param {Function} [iteratee=_.identity]
  *  The iteratee invoked per element.
  * @returns {number} Returns the index at which `value` should be inserted
  *  into `array`.
  * @example
  *
+ * var objects = [{ 'x': 4 }, { 'x': 5 }];
+ *
+ * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+ * // => 1
+ *
  * // The `_.property` iteratee shorthand.
- * _.sortedLastIndexBy([{ 'x': 4 }, { 'x': 5 }], { 'x': 4 }, 'x');
+ * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
  * // => 1
  */
 function sortedLastIndexBy(array, value, iteratee) {
-  return baseSortedIndexBy(array, value, baseIteratee(iteratee), true);
+  return baseSortedIndexBy(array, value, baseIteratee(iteratee, 2), true);
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
 }
 
 module.exports = sortedLastIndexBy;
diff --git a/lodash.sortedlastindexby/package.json b/lodash.sortedlastindexby/package.json
index 4578e5022..759ad1b15 100644
--- a/lodash.sortedlastindexby/package.json
+++ b/lodash.sortedlastindexby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.sortedlastindexby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.sortedLastIndexBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseiteratee": "~4.7.0",
-    "lodash._basesortedindexby": "~4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.sorteduniqby/README.md b/lodash.sorteduniqby/README.md
index c19d94559..657f20d99 100644
--- a/lodash.sorteduniqby/README.md
+++ b/lodash.sorteduniqby/README.md
@@ -1,4 +1,4 @@
-# lodash.sorteduniqby v4.4.0
+# lodash.sorteduniqby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.sortedUniqBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var sortedUniqBy = require('lodash.sorteduniqby');
 ```
 
-See the [documentation](https://lodash.com/docs#sortedUniqBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.sorteduniqby) for more details.
+See the [documentation](https://lodash.com/docs#sortedUniqBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.sorteduniqby) for more details.
diff --git a/lodash.sorteduniqby/package.json b/lodash.sorteduniqby/package.json
index a96329b10..7bebfc2e1 100644
--- a/lodash.sorteduniqby/package.json
+++ b/lodash.sorteduniqby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.sorteduniqby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.sortedUniqBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -15,7 +15,7 @@
   "repository": "lodash/lodash",
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
-    "lodash._baseiteratee": "~4.6.0",
+    "lodash._baseiteratee": "~4.7.0",
     "lodash._basesorteduniq": "~4.12.0"
   }
 }
diff --git a/lodash.sumby/README.md b/lodash.sumby/README.md
index 02e1c0971..7a8effb78 100644
--- a/lodash.sumby/README.md
+++ b/lodash.sumby/README.md
@@ -1,4 +1,4 @@
-# lodash.sumby v4.4.0
+# lodash.sumby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.sumBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var sumBy = require('lodash.sumby');
 ```
 
-See the [documentation](https://lodash.com/docs#sumBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.sumby) for more details.
+See the [documentation](https://lodash.com/docs#sumBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.sumby) for more details.
diff --git a/lodash.sumby/index.js b/lodash.sumby/index.js
index 47f7f6c33..55fddf323 100644
--- a/lodash.sumby/index.js
+++ b/lodash.sumby/index.js
@@ -6,7 +6,155 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseIteratee = require('lodash._baseiteratee');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
 
 /**
  * The base implementation of `_.sum` and `_.sumBy` without support for
@@ -31,6 +179,2091 @@ function baseSum(array, iteratee) {
   return result;
 }
 
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 /**
  * This method is like `_.sum` except that it accepts `iteratee` which is
  * invoked for each element in `array` to generate the value to be summed.
@@ -41,8 +2274,7 @@ function baseSum(array, iteratee) {
  * @since 4.0.0
  * @category Math
  * @param {Array} array The array to iterate over.
- * @param {Array|Function|Object|string} [iteratee=_.identity]
- *  The iteratee invoked per element.
+ * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  * @returns {number} Returns the sum.
  * @example
  *
@@ -57,7 +2289,7 @@ function baseSum(array, iteratee) {
  */
 function sumBy(array, iteratee) {
   return (array && array.length)
-    ? baseSum(array, baseIteratee(iteratee))
+    ? baseSum(array, baseIteratee(iteratee, 2))
     : 0;
 }
 
diff --git a/lodash.sumby/package.json b/lodash.sumby/package.json
index 026439235..ccf28dfc9 100644
--- a/lodash.sumby/package.json
+++ b/lodash.sumby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.sumby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.sumBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,8 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseiteratee": "~4.7.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.takerightwhile/README.md b/lodash.takerightwhile/README.md
index ea4e45716..8a84a7817 100644
--- a/lodash.takerightwhile/README.md
+++ b/lodash.takerightwhile/README.md
@@ -1,4 +1,4 @@
-# lodash.takerightwhile v4.4.0
+# lodash.takerightwhile v4.5.0
 
 The [lodash](https://lodash.com/) method `_.takeRightWhile` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var takeRightWhile = require('lodash.takerightwhile');
 ```
 
-See the [documentation](https://lodash.com/docs#takeRightWhile) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.takerightwhile) for more details.
+See the [documentation](https://lodash.com/docs#takeRightWhile) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.takerightwhile) for more details.
diff --git a/lodash.takerightwhile/index.js b/lodash.takerightwhile/index.js
index f49e2b280..2afed620d 100644
--- a/lodash.takerightwhile/index.js
+++ b/lodash.takerightwhile/index.js
@@ -6,8 +6,1151 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseIteratee = require('lodash._baseiteratee'),
-    baseSlice = require('lodash._baseslice');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+function baseSlice(array, start, end) {
+  var index = -1,
+      length = array.length;
+
+  if (start < 0) {
+    start = -start > length ? 0 : (length + start);
+  }
+  end = end > length ? length : end;
+  if (end < 0) {
+    end += length;
+  }
+  length = start > end ? 0 : ((end - start) >>> 0);
+  start >>>= 0;
+
+  var result = Array(length);
+  while (++index < length) {
+    result[index] = array[index + start];
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
 
 /**
  * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
@@ -32,6 +1175,558 @@ function baseWhile(array, predicate, isDrop, fromRight) {
     : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
 }
 
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Creates a slice of `array` with elements taken from the end. Elements are
  * taken until `predicate` returns falsey. The predicate is invoked with
@@ -42,7 +1737,7 @@ function baseWhile(array, predicate, isDrop, fromRight) {
  * @since 3.0.0
  * @category Array
  * @param {Array} array The array to query.
- * @param {Array|Function|Object|string} [predicate=_.identity]
+ * @param {Function} [predicate=_.identity]
  *  The function invoked per iteration.
  * @returns {Array} Returns the slice of `array`.
  * @example
@@ -74,4 +1769,571 @@ function takeRightWhile(array, predicate) {
     : [];
 }
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = takeRightWhile;
diff --git a/lodash.takerightwhile/package.json b/lodash.takerightwhile/package.json
index 1160e99b0..57202d546 100644
--- a/lodash.takerightwhile/package.json
+++ b/lodash.takerightwhile/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.takerightwhile",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.takeRightWhile` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseiteratee": "~4.7.0",
-    "lodash._baseslice": "~4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.takewhile/README.md b/lodash.takewhile/README.md
index 1c165cabf..6b0287576 100644
--- a/lodash.takewhile/README.md
+++ b/lodash.takewhile/README.md
@@ -1,4 +1,4 @@
-# lodash.takewhile v4.4.0
+# lodash.takewhile v4.5.0
 
 The [lodash](https://lodash.com/) method `_.takeWhile` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var takeWhile = require('lodash.takewhile');
 ```
 
-See the [documentation](https://lodash.com/docs#takeWhile) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.takewhile) for more details.
+See the [documentation](https://lodash.com/docs#takeWhile) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.takewhile) for more details.
diff --git a/lodash.takewhile/index.js b/lodash.takewhile/index.js
index 76b16f50c..ea765ac2a 100644
--- a/lodash.takewhile/index.js
+++ b/lodash.takewhile/index.js
@@ -6,8 +6,1151 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseIteratee = require('lodash._baseiteratee'),
-    baseSlice = require('lodash._baseslice');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
+
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+function baseSlice(array, start, end) {
+  var index = -1,
+      length = array.length;
+
+  if (start < 0) {
+    start = -start > length ? 0 : (length + start);
+  }
+  end = end > length ? length : end;
+  if (end < 0) {
+    end += length;
+  }
+  length = start > end ? 0 : ((end - start) >>> 0);
+  start >>>= 0;
+
+  var result = Array(length);
+  while (++index < length) {
+    result[index] = array[index + start];
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
 
 /**
  * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
@@ -32,6 +1175,558 @@ function baseWhile(array, predicate, isDrop, fromRight) {
     : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
 }
 
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Gets the `[[Prototype]]` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {null|Object} Returns the `[[Prototype]]`.
+ */
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Creates a slice of `array` with elements taken from the beginning. Elements
  * are taken until `predicate` returns falsey. The predicate is invoked with
@@ -42,7 +1737,7 @@ function baseWhile(array, predicate, isDrop, fromRight) {
  * @since 3.0.0
  * @category Array
  * @param {Array} array The array to query.
- * @param {Array|Function|Object|string} [predicate=_.identity]
+ * @param {Function} [predicate=_.identity]
  *  The function invoked per iteration.
  * @returns {Array} Returns the slice of `array`.
  * @example
@@ -74,4 +1769,571 @@ function takeWhile(array, predicate) {
     : [];
 }
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length,
+ *  else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+function isLength(value) {
+  return typeof value == 'number' &&
+    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = takeWhile;
diff --git a/lodash.takewhile/package.json b/lodash.takewhile/package.json
index 2de6b930d..cbde61623 100644
--- a/lodash.takewhile/package.json
+++ b/lodash.takewhile/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.takewhile",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.takeWhile` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseiteratee": "~4.7.0",
-    "lodash._baseslice": "~4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.template/LICENSE b/lodash.template/LICENSE
index e0c69d560..77c42f140 100644
--- a/lodash.template/LICENSE
+++ b/lodash.template/LICENSE
@@ -1,4 +1,4 @@
-Copyright jQuery Foundation and other contributors <https://jquery.org/>
+Copyright OpenJS Foundation and other contributors <https://openjsf.org/>
 
 Based on Underscore.js, copyright Jeremy Ashkenas,
 DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>
diff --git a/lodash.template/README.md b/lodash.template/README.md
index 251b38729..0310a7c70 100644
--- a/lodash.template/README.md
+++ b/lodash.template/README.md
@@ -1,6 +1,6 @@
-# lodash.template v4.4.0
+# lodash.template v4.5.0
 
-The [lodash](https://lodash.com/) method `_.template` exported as a [Node.js](https://nodejs.org/) module.
+The [Lodash](https://lodash.com/) method `_.template` exported as a [Node.js](https://nodejs.org/) module.
 
 ## Installation
 
@@ -15,4 +15,4 @@ In Node.js:
 var template = require('lodash.template');
 ```
 
-See the [documentation](https://lodash.com/docs#template) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.template) for more details.
+See the [documentation](https://lodash.com/docs#template) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.template) for more details.
diff --git a/lodash.template/index.js b/lodash.template/index.js
index 5fba1b0cb..f051141e3 100644
--- a/lodash.template/index.js
+++ b/lodash.template/index.js
@@ -1,7 +1,7 @@
 /**
- * lodash (Custom Build) <https://lodash.com/>
+ * Lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
- * Copyright jQuery Foundation and other contributors <https://jquery.org/>
+ * Copyright OpenJS Foundation and other contributors <https://openjsf.org/>
  * Released under MIT license <https://lodash.com/license>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
@@ -9,28 +9,68 @@
 var reInterpolate = require('lodash._reinterpolate'),
     templateSettings = require('lodash.templatesettings');
 
+/** Used to detect hot functions by number of calls within a span of milliseconds. */
+var HOT_COUNT = 800,
+    HOT_SPAN = 16;
+
 /** Used as references for various `Number` constants. */
 var INFINITY = 1 / 0,
     MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
 var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    asyncTag = '[object AsyncFunction]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    domExcTag = '[object DOMException]',
     errorTag = '[object Error]',
     funcTag = '[object Function]',
     genTag = '[object GeneratorFunction]',
-    symbolTag = '[object Symbol]';
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    nullTag = '[object Null]',
+    objectTag = '[object Object]',
+    proxyTag = '[object Proxy]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
+    undefinedTag = '[object Undefined]',
+    weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
+    float32Tag = '[object Float32Array]',
+    float64Tag = '[object Float64Array]',
+    int8Tag = '[object Int8Array]',
+    int16Tag = '[object Int16Array]',
+    int32Tag = '[object Int32Array]',
+    uint8Tag = '[object Uint8Array]',
+    uint8ClampedTag = '[object Uint8ClampedArray]',
+    uint16Tag = '[object Uint16Array]',
+    uint32Tag = '[object Uint32Array]';
 
 /** Used to match empty string literals in compiled template source. */
 var reEmptyStringLeading = /\b__p \+= '';/g,
     reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
     reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
 
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
 /**
  * Used to match
  * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
  */
 var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
 
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
 /** Used to detect unsigned integer values. */
 var reIsUint = /^(?:0|[1-9]\d*)$/;
 
@@ -40,6 +80,22 @@ var reNoMatch = /($^)/;
 /** Used to match unescaped characters in compiled string literals. */
 var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
 
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
 /** Used to escape characters for inclusion in compiled string literals. */
 var stringEscapes = {
   '\\': '\\',
@@ -59,6 +115,36 @@ var freeSelf = typeof self == 'object' && self && self.Object === Object && self
 /** Used as a reference to the global object. */
 var root = freeGlobal || freeSelf || Function('return this')();
 
+/** Detect free variable `exports`. */
+var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    // Use `util.types` for Node.js 10+.
+    var types = freeModule && freeModule.require && freeModule.require('util').types;
+
+    if (types) {
+      return types;
+    }
+
+    // Legacy `process.binding('util')` for Node.js < 10.
+    return freeProcess && freeProcess.binding && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
 /**
  * A faster alternative to `Function#apply`, this function invokes `func`
  * with the `this` binding of `thisArg` and the arguments of `args`.
@@ -90,7 +176,7 @@ function apply(func, thisArg, args) {
  */
 function arrayMap(array, iteratee) {
   var index = -1,
-      length = array ? array.length : 0,
+      length = array == null ? 0 : array.length,
       result = Array(length);
 
   while (++index < length) {
@@ -118,6 +204,19 @@ function baseTimes(n, iteratee) {
   return result;
 }
 
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
 /**
  * The base implementation of `_.values` and `_.valuesIn` which creates an
  * array of `object` property values corresponding to the property names
@@ -145,6 +244,18 @@ function escapeStringChar(chr) {
   return '\\' + stringEscapes[chr];
 }
 
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
 /**
  * Creates a unary function that invokes `func` with its argument transformed.
  *
@@ -160,25 +271,60 @@ function overArg(func, transform) {
 }
 
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var funcProto = Function.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
 /**
  * Used to resolve the
  * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
-var objectToString = objectProto.toString;
+var nativeObjectToString = objectProto.toString;
+
+/** Used to infer the `Object` constructor. */
+var objectCtorString = funcToString.call(Object);
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
 
 /** Built-in value references. */
-var Symbol = root.Symbol,
-    propertyIsEnumerable = objectProto.propertyIsEnumerable;
+var Buffer = moduleExports ? root.Buffer : undefined,
+    Symbol = root.Symbol,
+    getPrototype = overArg(Object.getPrototypeOf, Object),
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    symToStringTag = Symbol ? Symbol.toStringTag : undefined;
+
+var defineProperty = (function() {
+  try {
+    var func = getNative(Object, 'defineProperty');
+    func({}, '', {});
+    return func;
+  } catch (e) {}
+}());
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeKeys = overArg(Object.keys, Object),
-    nativeMax = Math.max;
+var nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
+    nativeKeys = overArg(Object.keys, Object),
+    nativeMax = Math.max,
+    nativeNow = Date.now;
 
 /** Used to convert symbols to primitives and strings. */
 var symbolProto = Symbol ? Symbol.prototype : undefined,
@@ -193,42 +339,32 @@ var symbolProto = Symbol ? Symbol.prototype : undefined,
  * @returns {Array} Returns the array of property names.
  */
 function arrayLikeKeys(value, inherited) {
-  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
-  // Safari 9 makes `arguments.length` enumerable in strict mode.
-  var result = (isArray(value) || isArguments(value))
-    ? baseTimes(value.length, String)
-    : [];
-
-  var length = result.length,
-      skipIndexes = !!length;
+  var isArr = isArray(value),
+      isArg = !isArr && isArguments(value),
+      isBuff = !isArr && !isArg && isBuffer(value),
+      isType = !isArr && !isArg && !isBuff && isTypedArray(value),
+      skipIndexes = isArr || isArg || isBuff || isType,
+      result = skipIndexes ? baseTimes(value.length, String) : [],
+      length = result.length;
 
   for (var key in value) {
     if ((inherited || hasOwnProperty.call(value, key)) &&
-        !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+        !(skipIndexes && (
+           // Safari 9 has enumerable `arguments.length` in strict mode.
+           key == 'length' ||
+           // Node.js 0.10 has enumerable non-index properties on buffers.
+           (isBuff && (key == 'offset' || key == 'parent')) ||
+           // PhantomJS 2 has enumerable non-index properties on typed arrays.
+           (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
+           // Skip index properties.
+           isIndex(key, length)
+        ))) {
       result.push(key);
     }
   }
   return result;
 }
 
-/**
- * Used by `_.defaults` to customize its `_.assignIn` use.
- *
- * @private
- * @param {*} objValue The destination value.
- * @param {*} srcValue The source value.
- * @param {string} key The key of the property to assign.
- * @param {Object} object The parent object of `objValue`.
- * @returns {*} Returns the value to assign.
- */
-function assignInDefaults(objValue, srcValue, key, object) {
-  if (objValue === undefined ||
-      (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
-    return srcValue;
-  }
-  return objValue;
-}
-
 /**
  * Assigns `value` to `key` of `object` if the existing value is not equivalent
  * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
@@ -243,10 +379,87 @@ function assignValue(object, key, value) {
   var objValue = object[key];
   if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
       (value === undefined && !(key in object))) {
+    baseAssignValue(object, key, value);
+  }
+}
+
+/**
+ * The base implementation of `assignValue` and `assignMergeValue` without
+ * value checks.
+ *
+ * @private
+ * @param {Object} object The object to modify.
+ * @param {string} key The key of the property to assign.
+ * @param {*} value The value to assign.
+ */
+function baseAssignValue(object, key, value) {
+  if (key == '__proto__' && defineProperty) {
+    defineProperty(object, key, {
+      'configurable': true,
+      'enumerable': true,
+      'value': value,
+      'writable': true
+    });
+  } else {
     object[key] = value;
   }
 }
 
+/**
+ * The base implementation of `getTag` without fallbacks for buggy environments.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  if (value == null) {
+    return value === undefined ? undefinedTag : nullTag;
+  }
+  return (symToStringTag && symToStringTag in Object(value))
+    ? getRawTag(value)
+    : objectToString(value);
+}
+
+/**
+ * The base implementation of `_.isArguments`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ */
+function baseIsArguments(value) {
+  return isObjectLike(value) && baseGetTag(value) == argsTag;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
+}
+
 /**
  * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
  *
@@ -298,26 +511,26 @@ function baseKeysIn(object) {
  * @returns {Function} Returns the new function.
  */
 function baseRest(func, start) {
-  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
-  return function() {
-    var args = arguments,
-        index = -1,
-        length = nativeMax(args.length - start, 0),
-        array = Array(length);
-
-    while (++index < length) {
-      array[index] = args[start + index];
-    }
-    index = -1;
-    var otherArgs = Array(start + 1);
-    while (++index < start) {
-      otherArgs[index] = args[index];
-    }
-    otherArgs[start] = array;
-    return apply(func, this, otherArgs);
-  };
+  return setToString(overRest(func, start, identity), func + '');
 }
 
+/**
+ * The base implementation of `setToString` without support for hot loop shorting.
+ *
+ * @private
+ * @param {Function} func The function to modify.
+ * @param {Function} string The `toString` result.
+ * @returns {Function} Returns `func`.
+ */
+var baseSetToString = !defineProperty ? identity : function(func, string) {
+  return defineProperty(func, 'toString', {
+    'configurable': true,
+    'enumerable': false,
+    'value': constant(string),
+    'writable': true
+  });
+};
+
 /**
  * The base implementation of `_.toString` which doesn't convert nullish
  * values to empty strings.
@@ -331,6 +544,10 @@ function baseToString(value) {
   if (typeof value == 'string') {
     return value;
   }
+  if (isArray(value)) {
+    // Recursively convert values (susceptible to call stack limits).
+    return arrayMap(value, baseToString) + '';
+  }
   if (isSymbol(value)) {
     return symbolToString ? symbolToString.call(value) : '';
   }
@@ -349,6 +566,7 @@ function baseToString(value) {
  * @returns {Object} Returns `object`.
  */
 function copyObject(source, props, object, customizer) {
+  var isNew = !object;
   object || (object = {});
 
   var index = -1,
@@ -361,7 +579,14 @@ function copyObject(source, props, object, customizer) {
       ? customizer(object[key], source[key], key, object, source)
       : undefined;
 
-    assignValue(object, key, newValue === undefined ? source[key] : newValue);
+    if (newValue === undefined) {
+      newValue = source[key];
+    }
+    if (isNew) {
+      baseAssignValue(object, key, newValue);
+    } else {
+      assignValue(object, key, newValue);
+    }
   }
   return object;
 }
@@ -399,6 +624,66 @@ function createAssigner(assigner) {
   });
 }
 
+/**
+ * Used by `_.defaults` to customize its `_.assignIn` use to assign properties
+ * of source objects to the destination object for all destination properties
+ * that resolve to `undefined`.
+ *
+ * @private
+ * @param {*} objValue The destination value.
+ * @param {*} srcValue The source value.
+ * @param {string} key The key of the property to assign.
+ * @param {Object} object The parent object of `objValue`.
+ * @returns {*} Returns the value to assign.
+ */
+function customDefaultsAssignIn(objValue, srcValue, key, object) {
+  if (objValue === undefined ||
+      (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
+    return srcValue;
+  }
+  return objValue;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the raw `toStringTag`.
+ */
+function getRawTag(value) {
+  var isOwn = hasOwnProperty.call(value, symToStringTag),
+      tag = value[symToStringTag];
+
+  try {
+    value[symToStringTag] = undefined;
+    var unmasked = true;
+  } catch (e) {}
+
+  var result = nativeObjectToString.call(value);
+  if (unmasked) {
+    if (isOwn) {
+      value[symToStringTag] = tag;
+    } else {
+      delete value[symToStringTag];
+    }
+  }
+  return result;
+}
+
 /**
  * Checks if `value` is a valid array-like index.
  *
@@ -408,10 +693,13 @@ function createAssigner(assigner) {
  * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
  */
 function isIndex(value, length) {
+  var type = typeof value;
   length = length == null ? MAX_SAFE_INTEGER : length;
+
   return !!length &&
-    (typeof value == 'number' || reIsUint.test(value)) &&
-    (value > -1 && value % 1 == 0 && value < length);
+    (type == 'number' ||
+      (type != 'symbol' && reIsUint.test(value))) &&
+        (value > -1 && value % 1 == 0 && value < length);
 }
 
 /**
@@ -438,6 +726,17 @@ function isIterateeCall(value, index, object) {
   return false;
 }
 
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
 /**
  * Checks if `value` is likely a prototype object.
  *
@@ -471,6 +770,105 @@ function nativeKeysIn(object) {
   return result;
 }
 
+/**
+ * Converts `value` to a string using `Object.prototype.toString`.
+ *
+ * @private
+ * @param {*} value The value to convert.
+ * @returns {string} Returns the converted string.
+ */
+function objectToString(value) {
+  return nativeObjectToString.call(value);
+}
+
+/**
+ * A specialized version of `baseRest` which transforms the rest array.
+ *
+ * @private
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @param {Function} transform The rest array transform.
+ * @returns {Function} Returns the new function.
+ */
+function overRest(func, start, transform) {
+  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+  return function() {
+    var args = arguments,
+        index = -1,
+        length = nativeMax(args.length - start, 0),
+        array = Array(length);
+
+    while (++index < length) {
+      array[index] = args[start + index];
+    }
+    index = -1;
+    var otherArgs = Array(start + 1);
+    while (++index < start) {
+      otherArgs[index] = args[index];
+    }
+    otherArgs[start] = transform(array);
+    return apply(func, this, otherArgs);
+  };
+}
+
+/**
+ * Sets the `toString` method of `func` to return `string`.
+ *
+ * @private
+ * @param {Function} func The function to modify.
+ * @param {Function} string The `toString` result.
+ * @returns {Function} Returns `func`.
+ */
+var setToString = shortOut(baseSetToString);
+
+/**
+ * Creates a function that'll short out and invoke `identity` instead
+ * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
+ * milliseconds.
+ *
+ * @private
+ * @param {Function} func The function to restrict.
+ * @returns {Function} Returns the new shortable function.
+ */
+function shortOut(func) {
+  var count = 0,
+      lastCalled = 0;
+
+  return function() {
+    var stamp = nativeNow(),
+        remaining = HOT_SPAN - (stamp - lastCalled);
+
+    lastCalled = stamp;
+    if (remaining > 0) {
+      if (++count >= HOT_COUNT) {
+        return arguments[0];
+      }
+    } else {
+      count = 0;
+    }
+    return func.apply(undefined, arguments);
+  };
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to convert.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Performs a
  * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
@@ -525,11 +923,10 @@ function eq(value, other) {
  * _.isArguments([1, 2, 3]);
  * // => false
  */
-function isArguments(value) {
-  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
-  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
-    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
-}
+var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
+  return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
+    !propertyIsEnumerable.call(value, 'callee');
+};
 
 /**
  * Checks if `value` is classified as an `Array` object.
@@ -586,33 +983,23 @@ function isArrayLike(value) {
 }
 
 /**
- * This method is like `_.isArrayLike` except that it also checks if `value`
- * is an object.
+ * Checks if `value` is a buffer.
  *
  * @static
  * @memberOf _
- * @since 4.0.0
+ * @since 4.3.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an array-like object,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
  * @example
  *
- * _.isArrayLikeObject([1, 2, 3]);
+ * _.isBuffer(new Buffer(2));
  * // => true
  *
- * _.isArrayLikeObject(document.body.children);
- * // => true
- *
- * _.isArrayLikeObject('abc');
- * // => false
- *
- * _.isArrayLikeObject(_.noop);
+ * _.isBuffer(new Uint8Array(2));
  * // => false
  */
-function isArrayLikeObject(value) {
-  return isObjectLike(value) && isArrayLike(value);
-}
+var isBuffer = nativeIsBuffer || stubFalse;
 
 /**
  * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
@@ -636,8 +1023,9 @@ function isError(value) {
   if (!isObjectLike(value)) {
     return false;
   }
-  return (objectToString.call(value) == errorTag) ||
-    (typeof value.message == 'string' && typeof value.name == 'string');
+  var tag = baseGetTag(value);
+  return tag == errorTag || tag == domExcTag ||
+    (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));
 }
 
 /**
@@ -658,10 +1046,13 @@ function isError(value) {
  * // => false
  */
 function isFunction(value) {
+  if (!isObject(value)) {
+    return false;
+  }
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8-9 which returns 'object' for typed array and other constructors.
-  var tag = isObject(value) ? objectToString.call(value) : '';
-  return tag == funcTag || tag == genTag;
+  // in Safari 9 which returns 'object' for typed arrays and other constructors.
+  var tag = baseGetTag(value);
+  return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
 }
 
 /**
@@ -722,7 +1113,7 @@ function isLength(value) {
  */
 function isObject(value) {
   var type = typeof value;
-  return !!value && (type == 'object' || type == 'function');
+  return value != null && (type == 'object' || type == 'function');
 }
 
 /**
@@ -750,7 +1141,48 @@ function isObject(value) {
  * // => false
  */
 function isObjectLike(value) {
-  return !!value && typeof value == 'object';
+  return value != null && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is a plain object, that is, an object created by the
+ * `Object` constructor or one with a `[[Prototype]]` of `null`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.8.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ * }
+ *
+ * _.isPlainObject(new Foo);
+ * // => false
+ *
+ * _.isPlainObject([1, 2, 3]);
+ * // => false
+ *
+ * _.isPlainObject({ 'x': 0, 'y': 0 });
+ * // => true
+ *
+ * _.isPlainObject(Object.create(null));
+ * // => true
+ */
+function isPlainObject(value) {
+  if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
+    return false;
+  }
+  var proto = getPrototype(value);
+  if (proto === null) {
+    return true;
+  }
+  var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
+  return typeof Ctor == 'function' && Ctor instanceof Ctor &&
+    funcToString.call(Ctor) == objectCtorString;
 }
 
 /**
@@ -772,9 +1204,28 @@ function isObjectLike(value) {
  */
 function isSymbol(value) {
   return typeof value == 'symbol' ||
-    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+    (isObjectLike(value) && baseGetTag(value) == symbolTag);
 }
 
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
 /**
  * Converts `value` to a string. An empty string is returned for `null`
  * and `undefined` values. The sign of `-0` is preserved.
@@ -783,8 +1234,8 @@ function isSymbol(value) {
  * @memberOf _
  * @since 4.0.0
  * @category Lang
- * @param {*} value The value to process.
- * @returns {string} Returns the string.
+ * @param {*} value The value to convert.
+ * @returns {string} Returns the converted string.
  * @example
  *
  * _.toString(null);
@@ -951,7 +1402,8 @@ function keysIn(object) {
  * compiled({ 'user': 'barney' });
  * // => 'hello barney!'
  *
- * // Use the ES delimiter as an alternative to the default "interpolate" delimiter.
+ * // Use the ES template literal delimiter as an "interpolate" delimiter.
+ * // Disable support by replacing the "interpolate" delimiter.
  * var compiled = _.template('hello ${ user }!');
  * compiled({ 'user': 'pebbles' });
  * // => 'hello pebbles!'
@@ -1005,9 +1457,9 @@ function template(string, options, guard) {
     options = undefined;
   }
   string = toString(string);
-  options = assignInWith({}, options, settings, assignInDefaults);
+  options = assignInWith({}, options, settings, customDefaultsAssignIn);
 
-  var imports = assignInWith({}, options.imports, settings.imports, assignInDefaults),
+  var imports = assignInWith({}, options.imports, settings.imports, customDefaultsAssignIn),
       importsKeys = keys(imports),
       importsValues = baseValues(imports, importsKeys);
 
@@ -1026,7 +1478,14 @@ function template(string, options, guard) {
   , 'g');
 
   // Use a sourceURL for easier debugging.
-  var sourceURL = 'sourceURL' in options ? '//# sourceURL=' + options.sourceURL + '\n' : '';
+  // The sourceURL gets injected into the source that's eval-ed, so be careful
+  // with lookup (in case of e.g. prototype pollution), and strip newlines if any.
+  // A newline wouldn't be a valid sourceURL anyway, and it'd enable code injection.
+  var sourceURL = hasOwnProperty.call(options, 'sourceURL')
+    ? ('//# sourceURL=' +
+       (options.sourceURL + '').replace(/[\r\n]/g, ' ') +
+       '\n')
+    : '';
 
   string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
     interpolateValue || (interpolateValue = esTemplateValue);
@@ -1057,7 +1516,9 @@ function template(string, options, guard) {
 
   // If `variable` is not specified wrap a with-statement around the generated
   // code to add the data object to the top of the scope chain.
-  var variable = options.variable;
+  // Like with sourceURL, we take care to not check the option's prototype,
+  // as this configuration is a code injection vector.
+  var variable = hasOwnProperty.call(options, 'variable') && options.variable;
   if (!variable) {
     source = 'with (obj) {\n' + source + '\n}\n';
   }
@@ -1129,4 +1590,66 @@ var attempt = baseRest(function(func, args) {
   }
 });
 
+/**
+ * Creates a function that returns `value`.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {*} value The value to return from the new function.
+ * @returns {Function} Returns the new constant function.
+ * @example
+ *
+ * var objects = _.times(2, _.constant({ 'a': 1 }));
+ *
+ * console.log(objects);
+ * // => [{ 'a': 1 }, { 'a': 1 }]
+ *
+ * console.log(objects[0] === objects[1]);
+ * // => true
+ */
+function constant(value) {
+  return function() {
+    return value;
+  };
+}
+
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * This method returns `false`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {boolean} Returns `false`.
+ * @example
+ *
+ * _.times(2, _.stubFalse);
+ * // => [false, false]
+ */
+function stubFalse() {
+  return false;
+}
+
 module.exports = template;
diff --git a/lodash.template/package.json b/lodash.template/package.json
index 99b09133b..2b7c97612 100644
--- a/lodash.template/package.json
+++ b/lodash.template/package.json
@@ -1,21 +1,20 @@
 {
   "name": "lodash.template",
-  "version": "4.4.0",
-  "description": "The lodash method `_.template` exported as a module.",
+  "version": "4.5.0",
+  "description": "The Lodash method `_.template` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
   "license": "MIT",
   "keywords": "lodash-modularized, template",
-  "author": "John-David Dalton <john.david.dalton@gmail.com> (http://allyoucanleet.com/)",
+  "author": "John-David Dalton <john.david.dalton@gmail.com>",
   "contributors": [
-    "John-David Dalton <john.david.dalton@gmail.com> (http://allyoucanleet.com/)",
-    "Blaine Bublitz <blaine.bublitz@gmail.com> (https://github.com/phated)",
-    "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
+    "John-David Dalton <john.david.dalton@gmail.com>",
+    "Mathias Bynens <mathias@qiwi.be>"
   ],
   "repository": "lodash/lodash",
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
-    "lodash._reinterpolate": "~3.0.0",
+    "lodash._reinterpolate": "^3.0.0",
     "lodash.templatesettings": "^4.0.0"
   }
 }
diff --git a/lodash.topath/README.md b/lodash.topath/README.md
index 949b7d4c8..70cf2f202 100644
--- a/lodash.topath/README.md
+++ b/lodash.topath/README.md
@@ -1,4 +1,4 @@
-# lodash.topath v4.4.0
+# lodash.topath v4.5.0
 
 The [lodash](https://lodash.com/) method `_.toPath` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var toPath = require('lodash.topath');
 ```
 
-See the [documentation](https://lodash.com/docs#toPath) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.topath) for more details.
+See the [documentation](https://lodash.com/docs#toPath) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.topath) for more details.
diff --git a/lodash.topath/index.js b/lodash.topath/index.js
index fc273ee08..1d00155a7 100644
--- a/lodash.topath/index.js
+++ b/lodash.topath/index.js
@@ -6,26 +6,57 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var stringToPath = require('lodash._stringtopath');
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
 /** Used as references for various `Number` constants. */
 var INFINITY = 1 / 0;
 
 /** `Object#toString` result references. */
-var symbolTag = '[object Symbol]';
+var funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    symbolTag = '[object Symbol]';
+
+/** Used to match property names within property paths. */
+var rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
 
 /**
  * A specialized version of `_.map` for arrays without support for iteratee
  * shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @returns {Array} Returns the new mapped array.
  */
 function arrayMap(array, iteratee) {
   var index = -1,
-      length = array.length,
+      length = array ? array.length : 0,
       result = Array(length);
 
   while (++index < length) {
@@ -34,8 +65,55 @@ function arrayMap(array, iteratee) {
   return result;
 }
 
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
@@ -44,6 +122,382 @@ var objectProto = Object.prototype;
  */
 var objectToString = objectProto.toString;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    splice = arrayProto.splice;
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Copies the values of `source` to `array`.
  *
@@ -63,6 +517,74 @@ function copyArray(source, array) {
   return array;
 }
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
 /**
  * Converts `value` to a string key if it's not a string or symbol.
  *
@@ -78,17 +600,137 @@ function toKey(value) {
   return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
 }
 
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -105,6 +747,61 @@ function toKey(value) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
 /**
  * Checks if `value` is object-like. A value is object-like if it's not `null`
  * and has a `typeof` result of "object".
@@ -141,8 +838,7 @@ function isObjectLike(value) {
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  * @example
  *
  * _.isSymbol(Symbol.iterator);
@@ -156,6 +852,31 @@ function isSymbol(value) {
     (isObjectLike(value) && objectToString.call(value) == symbolTag);
 }
 
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
 /**
  * Converts `value` to a property path array.
  *
@@ -172,15 +893,6 @@ function isSymbol(value) {
  *
  * _.toPath('a[0].b.c');
  * // => ['a', '0', 'b', 'c']
- *
- * var path = ['a', 'b', 'c'],
- *     newPath = _.toPath(path);
- *
- * console.log(newPath);
- * // => ['a', 'b', 'c']
- *
- * console.log(path === newPath);
- * // => false
  */
 function toPath(value) {
   if (isArray(value)) {
diff --git a/lodash.topath/package.json b/lodash.topath/package.json
index b09cfe76b..d9d3e0680 100644
--- a/lodash.topath/package.json
+++ b/lodash.topath/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.topath",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.toPath` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,8 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._stringtopath": "~4.8.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.transform/README.md b/lodash.transform/README.md
index 1557bf7c3..c90f23ede 100644
--- a/lodash.transform/README.md
+++ b/lodash.transform/README.md
@@ -1,4 +1,4 @@
-# lodash.transform v4.4.0
+# lodash.transform v4.5.0
 
 The [lodash](https://lodash.com/) method `_.transform` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var transform = require('lodash.transform');
 ```
 
-See the [documentation](https://lodash.com/docs#transform) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.transform) for more details.
+See the [documentation](https://lodash.com/docs#transform) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.transform) for more details.
diff --git a/lodash.transform/index.js b/lodash.transform/index.js
index 01865c1b2..963f7f601 100644
--- a/lodash.transform/index.js
+++ b/lodash.transform/index.js
@@ -6,12 +6,23 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseFor = require('lodash._basefor'),
-    baseIteratee = require('lodash._baseiteratee'),
-    keys = require('lodash.keys');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
 
 /** Used as references for various `Number` constants. */
-var MAX_SAFE_INTEGER = 9007199254740991;
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
 var argsTag = '[object Arguments]',
@@ -24,9 +35,11 @@ var argsTag = '[object Arguments]',
     mapTag = '[object Map]',
     numberTag = '[object Number]',
     objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
     regexpTag = '[object RegExp]',
     setTag = '[object Set]',
     stringTag = '[object String]',
+    symbolTag = '[object Symbol]',
     weakMapTag = '[object WeakMap]';
 
 var arrayBufferTag = '[object ArrayBuffer]',
@@ -41,6 +54,26 @@ var arrayBufferTag = '[object ArrayBuffer]',
     uint16Tag = '[object Uint16Array]',
     uint32Tag = '[object Uint32Array]';
 
+/** Used to match property names within property paths. */
+var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
 /** Used to identify `toStringTag` values of typed arrays. */
 var typedArrayTags = {};
 typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
@@ -57,18 +90,49 @@ typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
 typedArrayTags[setTag] = typedArrayTags[stringTag] =
 typedArrayTags[weakMapTag] = false;
 
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/** Detect free variable `exports`. */
+var freeExports = freeGlobal && typeof exports == 'object' && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+  try {
+    return freeProcess && freeProcess.binding('util');
+  } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
 /**
  * A specialized version of `_.forEach` for arrays without support for
  * iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @returns {Array} Returns `array`.
  */
 function arrayEach(array, iteratee) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     if (iteratee(array[index], index, array) === false) {
@@ -78,8 +142,170 @@ function arrayEach(array, iteratee) {
   return array;
 }
 
+/**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
+ */
+function arraySome(array, predicate) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (predicate(array[index], index, array)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function baseProperty(key) {
+  return function(object) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+  var index = -1,
+      result = Array(n);
+
+  while (++index < n) {
+    result[index] = iteratee(index);
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+  return function(value) {
+    return func(value);
+  };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+function mapToArray(map) {
+  var index = -1,
+      result = Array(map.size);
+
+  map.forEach(function(value, key) {
+    result[++index] = [key, value];
+  });
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
@@ -88,11 +314,506 @@ var objectProto = Object.prototype;
  */
 var objectToString = objectProto.toString;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
 /** Built-in value references. */
-var objectCreate = Object.create;
+var Symbol = root.Symbol,
+    Uint8Array = root.Uint8Array,
+    objectCreate = Object.create,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice;
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf;
+var nativeGetPrototype = Object.getPrototypeOf,
+    nativeKeys = Object.keys;
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView'),
+    Map = getNative(root, 'Map'),
+    Promise = getNative(root, 'Promise'),
+    Set = getNative(root, 'Set'),
+    WeakMap = getNative(root, 'WeakMap'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to detect maps, sets, and weakmaps. */
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+  this.__data__ = new ListCache(entries);
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+  this.__data__ = new ListCache;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+  return this.__data__['delete'](key);
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+  return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+  return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+  var cache = this.__data__;
+  if (cache instanceof ListCache) {
+    var pairs = cache.__data__;
+    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+      pairs.push([key, value]);
+      return this;
+    }
+    cache = this.__data__ = new MapCache(pairs);
+  }
+  cache.set(key, value);
+  return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
 
 /**
  * The base implementation of `_.create` without support for assigning
@@ -106,6 +827,19 @@ function baseCreate(proto) {
   return isObject(proto) ? objectCreate(proto) : {};
 }
 
+/**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+var baseFor = createBaseFor();
+
 /**
  * The base implementation of `_.forOwn` without support for iteratee shorthands.
  *
@@ -118,6 +852,665 @@ function baseForOwn(object, iteratee) {
   return object && baseFor(object, iteratee, keys);
 }
 
+/**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+function baseGet(object, path) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[toKey(path[index++])];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+/**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHas(object, key) {
+  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
+  // that are composed entirely of index properties, return `false` for
+  // `hasOwnProperty` checks of them.
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+function baseHasIn(object, key) {
+  return object != null && key in Object(object);
+}
+
+/**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {boolean} [bitmask] The bitmask of comparison flags.
+ *  The bitmask may be composed of the following flags:
+ *     1 - Unordered comparison
+ *     2 - Partial comparison
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+function baseIsEqual(value, other, customizer, bitmask, stack) {
+  if (value === other) {
+    return true;
+  }
+  if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    return value !== value && other !== other;
+  }
+  return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+}
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    objTag = objTag == argsTag ? objectTag : objTag;
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    othTag = othTag == argsTag ? objectTag : othTag;
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !objIsObj) {
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+  }
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
+      stack || (stack = new Stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+/**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+function baseIsMatch(object, source, matchData, customizer) {
+  var index = matchData.length,
+      length = index,
+      noCustomizer = !customizer;
+
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (index--) {
+    var data = matchData[index];
+    if ((noCustomizer && data[2])
+          ? data[1] !== object[data[0]]
+          : !(data[0] in object)
+        ) {
+      return false;
+    }
+  }
+  while (++index < length) {
+    data = matchData[index];
+    var key = data[0],
+        objValue = object[key],
+        srcValue = data[1];
+
+    if (noCustomizer && data[2]) {
+      if (objValue === undefined && !(key in object)) {
+        return false;
+      }
+    } else {
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
+      if (!(result === undefined
+            ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+            : result
+          )) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+  return isObjectLike(value) &&
+    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+}
+
+/**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+function baseIteratee(value) {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
+    return value;
+  }
+  if (value == null) {
+    return identity;
+  }
+  if (typeof value == 'object') {
+    return isArray(value)
+      ? baseMatchesProperty(value[0], value[1])
+      : baseMatches(value);
+  }
+  return property(value);
+}
+
+/**
+ * The base implementation of `_.keys` which doesn't skip the constructor
+ * property of prototypes or treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+var baseKeys = overArg(nativeKeys, Object);
+
+/**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+/**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(toKey(path), srcValue);
+  }
+  return function(object) {
+    var objValue = get(object, path);
+    return (objValue === undefined && objValue === srcValue)
+      ? hasIn(object, path)
+      : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+  };
+}
+
+/**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function castPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+/**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+function createBaseFor(fromRight) {
+  return function(object, iteratee, keysFunc) {
+    var index = -1,
+        iterable = Object(object),
+        props = keysFunc(object),
+        length = props.length;
+
+    while (length--) {
+      var key = props[fromRight ? length : ++index];
+      if (iteratee(iterable[key], key, iterable) === false) {
+        break;
+      }
+    }
+    return object;
+  };
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      arrLength = array.length,
+      othLength = other.length;
+
+  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(array);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var index = -1,
+      result = true,
+      seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
+
+  stack.set(array, other);
+  stack.set(other, array);
+
+  // Ignore non-index properties.
+  while (++index < arrLength) {
+    var arrValue = array[index],
+        othValue = other[index];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, arrValue, index, other, array, stack)
+        : customizer(arrValue, othValue, index, array, other, stack);
+    }
+    if (compared !== undefined) {
+      if (compared) {
+        continue;
+      }
+      result = false;
+      break;
+    }
+    // Recursively compare arrays (susceptible to call stack limits).
+    if (seen) {
+      if (!arraySome(other, function(othValue, othIndex) {
+            if (!seen.has(othIndex) &&
+                (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+              return seen.add(othIndex);
+            }
+          })) {
+        result = false;
+        break;
+      }
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
+      result = false;
+      break;
+    }
+  }
+  stack['delete'](array);
+  return result;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
+  switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
+    case arrayBufferTag:
+      if ((object.byteLength != other.byteLength) ||
+          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+        return false;
+      }
+      return true;
+
+    case boolTag:
+    case dateTag:
+    case numberTag:
+      // Coerce booleans to `1` or `0` and dates to milliseconds.
+      // Invalid dates are coerced to `NaN`.
+      return eq(+object, +other);
+
+    case errorTag:
+      return object.name == other.name && object.message == other.message;
+
+    case regexpTag:
+    case stringTag:
+      // Coerce regexes to strings and treat strings, primitives and objects,
+      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // for more details.
+      return object == (other + '');
+
+    case mapTag:
+      var convert = mapToArray;
+
+    case setTag:
+      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+      convert || (convert = setToArray);
+
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+
+      // Recursively compare objects (susceptible to call stack limits).
+      stack.set(object, other);
+      var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
+      stack['delete'](object);
+      return result;
+
+    case symbolTag:
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
+  }
+  return false;
+}
+
+/**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
+      objProps = keys(object),
+      objLength = objProps.length,
+      othProps = keys(other),
+      othLength = othProps.length;
+
+  if (objLength != othLength && !isPartial) {
+    return false;
+  }
+  var index = objLength;
+  while (index--) {
+    var key = objProps[index];
+    if (!(isPartial ? key in other : baseHas(other, key))) {
+      return false;
+    }
+  }
+  // Assume cyclic values are equal.
+  var stacked = stack.get(object);
+  if (stacked && stack.get(other)) {
+    return stacked == other;
+  }
+  var result = true;
+  stack.set(object, other);
+  stack.set(other, object);
+
+  var skipCtor = isPartial;
+  while (++index < objLength) {
+    key = objProps[index];
+    var objValue = object[key],
+        othValue = other[key];
+
+    if (customizer) {
+      var compared = isPartial
+        ? customizer(othValue, objValue, key, other, object, stack)
+        : customizer(objValue, othValue, key, object, other, stack);
+    }
+    // Recursively compare objects (susceptible to call stack limits).
+    if (!(compared === undefined
+          ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
+          : compared
+        )) {
+      result = false;
+      break;
+    }
+    skipCtor || (skipCtor = key == 'constructor');
+  }
+  if (result && !skipCtor) {
+    var objCtor = object.constructor,
+        othCtor = other.constructor;
+
+    // Non `Object` object instances with different constructors are not equal.
+    if (objCtor != othCtor &&
+        ('constructor' in object && 'constructor' in other) &&
+        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      result = false;
+    }
+  }
+  stack['delete'](object);
+  return result;
+}
+
+/**
+ * Gets the "length" property value of `object`.
+ *
+ * **Note:** This function is used to avoid a
+ * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
+ * Safari on at least iOS 8.1-8.3 ARM64.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {*} Returns the "length" value.
+ */
+var getLength = baseProperty('length');
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+function getMatchData(object) {
+  var result = keys(object),
+      length = result.length;
+
+  while (length--) {
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
+  }
+  return result;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
 /**
  * Gets the `[[Prototype]]` of `value`.
  *
@@ -125,8 +1518,370 @@ function baseForOwn(object, iteratee) {
  * @param {*} value The value to query.
  * @returns {null|Object} Returns the `[[Prototype]]`.
  */
-function getPrototype(value) {
-  return nativeGetPrototype(Object(value));
+var getPrototype = overArg(nativeGetPrototype, Object);
+
+/**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+var getTag = baseGetTag;
+
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+    (Map && getTag(new Map) != mapTag) ||
+    (Promise && getTag(Promise.resolve()) != promiseTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+  getTag = function(value) {
+    var result = objectToString.call(value),
+        Ctor = result == objectTag ? value.constructor : undefined,
+        ctorString = Ctor ? toSource(Ctor) : undefined;
+
+    if (ctorString) {
+      switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
+        case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
+      }
+    }
+    return result;
+  };
+}
+
+/**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+function hasPath(object, path, hasFunc) {
+  path = isKey(path, object) ? [path] : castPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
+    }
+    object = object[key];
+  }
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
+}
+
+/**
+ * Creates an array of index keys for `object` values of arrays,
+ * `arguments` objects, and strings, otherwise `null` is returned.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array|null} Returns index keys, else `null`.
+ */
+function indexKeys(object) {
+  var length = object ? object.length : undefined;
+  if (isLength(length) &&
+      (isArray(object) || isString(object) || isArguments(object))) {
+    return baseTimes(length, String);
+  }
+  return null;
+}
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return !!length &&
+    (typeof value == 'number' || reIsUint.test(value)) &&
+    (value > -1 && value % 1 == 0 && value < length);
+}
+
+/**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+function isKey(value, object) {
+  if (isArray(value)) {
+    return false;
+  }
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+      value == null || isSymbol(value)) {
+    return true;
+  }
+  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (object != null && value in Object(object));
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+  var Ctor = value && value.constructor,
+      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+  return value === proto;
+}
+
+/**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ *  equality comparisons, else `false`.
+ */
+function isStrictComparable(value) {
+  return value === value && !isObject(value);
+}
+
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(value) {
+  if (typeof value == 'string' || isSymbol(value)) {
+    return value;
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
 
 /**
@@ -135,11 +1890,9 @@ function getPrototype(value) {
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -156,6 +1909,64 @@ function getPrototype(value) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+function isArrayLike(value) {
+  return value != null && isLength(getLength(value)) && !isFunction(value);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+  return isObjectLike(value) && isArrayLike(value);
+}
+
 /**
  * Checks if `value` is classified as a `Function` object.
  *
@@ -164,8 +1975,7 @@ var isArray = Array.isArray;
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -272,6 +2082,50 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
+/**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+function isString(value) {
+  return typeof value == 'string' ||
+    (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
 /**
  * Checks if `value` is classified as a typed array.
  *
@@ -280,8 +2134,7 @@ function isObjectLike(value) {
  * @since 3.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
  * @example
  *
  * _.isTypedArray(new Uint8Array);
@@ -290,24 +2143,155 @@ function isObjectLike(value) {
  * _.isTypedArray([]);
  * // => false
  */
-function isTypedArray(value) {
-  return isObjectLike(value) &&
-    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
+/**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+function get(object, path, defaultValue) {
+  var result = object == null ? undefined : baseGet(object, path);
+  return result === undefined ? defaultValue : result;
+}
+
+/**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+function hasIn(object, path) {
+  return object != null && hasPath(object, path, baseHasIn);
+}
+
+/**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ *   this.a = 1;
+ *   this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+function keys(object) {
+  var isProto = isPrototype(object);
+  if (!(isProto || isArrayLike(object))) {
+    return baseKeys(object);
+  }
+  var indexes = indexKeys(object),
+      skipIndexes = !!indexes,
+      result = indexes || [],
+      length = result.length;
+
+  for (var key in object) {
+    if (baseHas(object, key) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
+        !(isProto && key == 'constructor')) {
+      result.push(key);
+    }
+  }
+  return result;
 }
 
 /**
  * An alternative to `_.reduce`; this method transforms `object` to a new
  * `accumulator` object which is the result of running each of its own
  * enumerable string keyed properties thru `iteratee`, with each invocation
- * potentially mutating the `accumulator` object. The iteratee is invoked
- * with four arguments: (accumulator, value, key, object). Iteratee functions
- * may exit iteration early by explicitly returning `false`.
+ * potentially mutating the `accumulator` object. If `accumulator` is not
+ * provided, a new object with the same `[[Prototype]]` will be used. The
+ * iteratee is invoked with four arguments: (accumulator, value, key, object).
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
  *
  * @static
  * @memberOf _
  * @since 1.3.0
  * @category Object
- * @param {Array|Object} object The object to iterate over.
+ * @param {Object} object The object to iterate over.
  * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  * @param {*} [accumulator] The custom accumulator value.
  * @returns {*} Returns the accumulated value.
@@ -346,4 +2330,50 @@ function transform(object, iteratee, accumulator) {
   return accumulator;
 }
 
+/**
+ * This method returns the first argument it receives.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Util
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ *
+ * console.log(_.identity(object) === object);
+ * // => true
+ */
+function identity(value) {
+  return value;
+}
+
+/**
+ * Creates a function that returns the value at `path` of a given object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ * @example
+ *
+ * var objects = [
+ *   { 'a': { 'b': 2 } },
+ *   { 'a': { 'b': 1 } }
+ * ];
+ *
+ * _.map(objects, _.property('a.b'));
+ * // => [2, 1]
+ *
+ * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+ * // => [1, 2]
+ */
+function property(path) {
+  return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+}
+
 module.exports = transform;
diff --git a/lodash.transform/package.json b/lodash.transform/package.json
index 8c55ad6e3..2c023415e 100644
--- a/lodash.transform/package.json
+++ b/lodash.transform/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.transform",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.transform` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._basefor": "~3.0.0",
-    "lodash._baseiteratee": "~4.7.0",
-    "lodash.keys": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.trim/README.md b/lodash.trim/README.md
index b5f30e329..065702985 100644
--- a/lodash.trim/README.md
+++ b/lodash.trim/README.md
@@ -1,4 +1,4 @@
-# lodash.trim v4.4.0
+# lodash.trim v4.5.0
 
 The [lodash](https://lodash.com/) method `_.trim` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var trim = require('lodash.trim');
 ```
 
-See the [documentation](https://lodash.com/docs#trim) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.trim) for more details.
+See the [documentation](https://lodash.com/docs#trim) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.trim) for more details.
diff --git a/lodash.trim/index.js b/lodash.trim/index.js
index f77bbc0a5..bf6abdc20 100644
--- a/lodash.trim/index.js
+++ b/lodash.trim/index.js
@@ -6,9 +6,12 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseSlice = require('lodash._baseslice'),
-    baseToString = require('lodash._basetostring'),
-    toString = require('lodash.tostring');
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0;
+
+/** `Object#toString` result references. */
+var symbolTag = '[object Symbol]';
 
 /** Used to match leading and trailing whitespace. */
 var reTrim = /^\s+|\s+$/g;
@@ -39,6 +42,38 @@ var reOptMod = rsModifier + '?',
 /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
 var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
 
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/**
+ * The base implementation of `_.findIndex` and `_.findLastIndex` without
+ * support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {Function} predicate The function invoked per iteration.
+ * @param {number} fromIndex The index to search from.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function baseFindIndex(array, predicate, fromIndex, fromRight) {
+  var length = array.length,
+      index = fromIndex + (fromRight ? 1 : -1);
+
+  while ((fromRight ? index-- : ++index < length)) {
+    if (predicate(array[index], index, array)) {
+      return index;
+    }
+  }
+  return -1;
+}
+
 /**
  * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
  *
@@ -50,7 +85,7 @@ var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq,
  */
 function baseIndexOf(array, value, fromIndex) {
   if (value !== value) {
-    return indexOfNaN(array, fromIndex);
+    return baseFindIndex(array, baseIsNaN, fromIndex);
   }
   var index = fromIndex - 1,
       length = array.length;
@@ -63,6 +98,17 @@ function baseIndexOf(array, value, fromIndex) {
   return -1;
 }
 
+/**
+ * The base implementation of `_.isNaN` without support for number objects.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+ */
+function baseIsNaN(value) {
+  return value !== value;
+}
+
 /**
  * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
  * that is not found in the character symbols.
@@ -96,28 +142,6 @@ function charsEndIndex(strSymbols, chrSymbols) {
   return index;
 }
 
-/**
- * Gets the index at which the first occurrence of `NaN` is found in `array`.
- *
- * @private
- * @param {Array} array The array to search.
- * @param {number} fromIndex The index to search from.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {number} Returns the index of the matched `NaN`, else `-1`.
- */
-function indexOfNaN(array, fromIndex, fromRight) {
-  var length = array.length,
-      index = fromIndex + (fromRight ? 0 : -1);
-
-  while ((fromRight ? index-- : ++index < length)) {
-    var other = array[index];
-    if (other !== other) {
-      return index;
-    }
-  }
-  return -1;
-}
-
 /**
  * Converts `string` to an array.
  *
@@ -129,6 +153,73 @@ function stringToArray(string) {
   return string.match(reComplexSymbol);
 }
 
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Built-in value references. */
+var Symbol = root.Symbol;
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+function baseSlice(array, start, end) {
+  var index = -1,
+      length = array.length;
+
+  if (start < 0) {
+    start = -start > length ? 0 : (length + start);
+  }
+  end = end > length ? length : end;
+  if (end < 0) {
+    end += length;
+  }
+  length = start > end ? 0 : ((end - start) >>> 0);
+  start >>>= 0;
+
+  var result = Array(length);
+  while (++index < length) {
+    result[index] = array[index + start];
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Casts `array` to a slice if it's needed.
  *
@@ -144,6 +235,81 @@ function castSlice(array, start, end) {
   return (!start && end >= length) ? array : baseSlice(array, start, end);
 }
 
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
 /**
  * Removes leading and trailing whitespace or specified characters from `string`.
  *
diff --git a/lodash.trim/package.json b/lodash.trim/package.json
index 88a2ac0cb..86c77a8b2 100644
--- a/lodash.trim/package.json
+++ b/lodash.trim/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.trim",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.trim` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseslice": "~4.0.0",
-    "lodash._basetostring": "~4.12.0",
-    "lodash.tostring": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.trimend/README.md b/lodash.trimend/README.md
index 2473ad92a..9c6b83677 100644
--- a/lodash.trimend/README.md
+++ b/lodash.trimend/README.md
@@ -1,4 +1,4 @@
-# lodash.trimend v4.4.0
+# lodash.trimend v4.5.0
 
 The [lodash](https://lodash.com/) method `_.trimEnd` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var trimEnd = require('lodash.trimend');
 ```
 
-See the [documentation](https://lodash.com/docs#trimEnd) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.trimend) for more details.
+See the [documentation](https://lodash.com/docs#trimEnd) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.trimend) for more details.
diff --git a/lodash.trimend/index.js b/lodash.trimend/index.js
index e2efede38..f162d1f65 100644
--- a/lodash.trimend/index.js
+++ b/lodash.trimend/index.js
@@ -6,9 +6,12 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseSlice = require('lodash._baseslice'),
-    baseToString = require('lodash._basetostring'),
-    toString = require('lodash.tostring');
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0;
+
+/** `Object#toString` result references. */
+var symbolTag = '[object Symbol]';
 
 /** Used to match leading and trailing whitespace. */
 var reTrimEnd = /\s+$/;
@@ -39,6 +42,38 @@ var reOptMod = rsModifier + '?',
 /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
 var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
 
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/**
+ * The base implementation of `_.findIndex` and `_.findLastIndex` without
+ * support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {Function} predicate The function invoked per iteration.
+ * @param {number} fromIndex The index to search from.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function baseFindIndex(array, predicate, fromIndex, fromRight) {
+  var length = array.length,
+      index = fromIndex + (fromRight ? 1 : -1);
+
+  while ((fromRight ? index-- : ++index < length)) {
+    if (predicate(array[index], index, array)) {
+      return index;
+    }
+  }
+  return -1;
+}
+
 /**
  * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
  *
@@ -50,7 +85,7 @@ var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq,
  */
 function baseIndexOf(array, value, fromIndex) {
   if (value !== value) {
-    return indexOfNaN(array, fromIndex);
+    return baseFindIndex(array, baseIsNaN, fromIndex);
   }
   var index = fromIndex - 1,
       length = array.length;
@@ -63,6 +98,17 @@ function baseIndexOf(array, value, fromIndex) {
   return -1;
 }
 
+/**
+ * The base implementation of `_.isNaN` without support for number objects.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+ */
+function baseIsNaN(value) {
+  return value !== value;
+}
+
 /**
  * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
  * that is not found in the character symbols.
@@ -79,28 +125,6 @@ function charsEndIndex(strSymbols, chrSymbols) {
   return index;
 }
 
-/**
- * Gets the index at which the first occurrence of `NaN` is found in `array`.
- *
- * @private
- * @param {Array} array The array to search.
- * @param {number} fromIndex The index to search from.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {number} Returns the index of the matched `NaN`, else `-1`.
- */
-function indexOfNaN(array, fromIndex, fromRight) {
-  var length = array.length,
-      index = fromIndex + (fromRight ? 0 : -1);
-
-  while ((fromRight ? index-- : ++index < length)) {
-    var other = array[index];
-    if (other !== other) {
-      return index;
-    }
-  }
-  return -1;
-}
-
 /**
  * Converts `string` to an array.
  *
@@ -112,6 +136,73 @@ function stringToArray(string) {
   return string.match(reComplexSymbol);
 }
 
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Built-in value references. */
+var Symbol = root.Symbol;
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+function baseSlice(array, start, end) {
+  var index = -1,
+      length = array.length;
+
+  if (start < 0) {
+    start = -start > length ? 0 : (length + start);
+  }
+  end = end > length ? length : end;
+  if (end < 0) {
+    end += length;
+  }
+  length = start > end ? 0 : ((end - start) >>> 0);
+  start >>>= 0;
+
+  var result = Array(length);
+  while (++index < length) {
+    result[index] = array[index + start];
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Casts `array` to a slice if it's needed.
  *
@@ -127,6 +218,81 @@ function castSlice(array, start, end) {
   return (!start && end >= length) ? array : baseSlice(array, start, end);
 }
 
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
 /**
  * Removes trailing whitespace or specified characters from `string`.
  *
diff --git a/lodash.trimend/package.json b/lodash.trimend/package.json
index 8003158e1..3b8b6d599 100644
--- a/lodash.trimend/package.json
+++ b/lodash.trimend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.trimend",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.trimEnd` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseslice": "~4.0.0",
-    "lodash._basetostring": "~4.12.0",
-    "lodash.tostring": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.trimstart/README.md b/lodash.trimstart/README.md
index 3381e066c..6d818725b 100644
--- a/lodash.trimstart/README.md
+++ b/lodash.trimstart/README.md
@@ -1,4 +1,4 @@
-# lodash.trimstart v4.4.0
+# lodash.trimstart v4.5.0
 
 The [lodash](https://lodash.com/) method `_.trimStart` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var trimStart = require('lodash.trimstart');
 ```
 
-See the [documentation](https://lodash.com/docs#trimStart) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.trimstart) for more details.
+See the [documentation](https://lodash.com/docs#trimStart) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.trimstart) for more details.
diff --git a/lodash.trimstart/index.js b/lodash.trimstart/index.js
index ec5056a91..7c65170be 100644
--- a/lodash.trimstart/index.js
+++ b/lodash.trimstart/index.js
@@ -6,9 +6,12 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseSlice = require('lodash._baseslice'),
-    baseToString = require('lodash._basetostring'),
-    toString = require('lodash.tostring');
+
+/** Used as references for various `Number` constants. */
+var INFINITY = 1 / 0;
+
+/** `Object#toString` result references. */
+var symbolTag = '[object Symbol]';
 
 /** Used to match leading and trailing whitespace. */
 var reTrimStart = /^\s+/;
@@ -39,6 +42,38 @@ var reOptMod = rsModifier + '?',
 /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
 var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
 
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/**
+ * The base implementation of `_.findIndex` and `_.findLastIndex` without
+ * support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {Function} predicate The function invoked per iteration.
+ * @param {number} fromIndex The index to search from.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function baseFindIndex(array, predicate, fromIndex, fromRight) {
+  var length = array.length,
+      index = fromIndex + (fromRight ? 1 : -1);
+
+  while ((fromRight ? index-- : ++index < length)) {
+    if (predicate(array[index], index, array)) {
+      return index;
+    }
+  }
+  return -1;
+}
+
 /**
  * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
  *
@@ -50,7 +85,7 @@ var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq,
  */
 function baseIndexOf(array, value, fromIndex) {
   if (value !== value) {
-    return indexOfNaN(array, fromIndex);
+    return baseFindIndex(array, baseIsNaN, fromIndex);
   }
   var index = fromIndex - 1,
       length = array.length;
@@ -63,6 +98,17 @@ function baseIndexOf(array, value, fromIndex) {
   return -1;
 }
 
+/**
+ * The base implementation of `_.isNaN` without support for number objects.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+ */
+function baseIsNaN(value) {
+  return value !== value;
+}
+
 /**
  * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
  * that is not found in the character symbols.
@@ -80,28 +126,6 @@ function charsStartIndex(strSymbols, chrSymbols) {
   return index;
 }
 
-/**
- * Gets the index at which the first occurrence of `NaN` is found in `array`.
- *
- * @private
- * @param {Array} array The array to search.
- * @param {number} fromIndex The index to search from.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {number} Returns the index of the matched `NaN`, else `-1`.
- */
-function indexOfNaN(array, fromIndex, fromRight) {
-  var length = array.length,
-      index = fromIndex + (fromRight ? 0 : -1);
-
-  while ((fromRight ? index-- : ++index < length)) {
-    var other = array[index];
-    if (other !== other) {
-      return index;
-    }
-  }
-  return -1;
-}
-
 /**
  * Converts `string` to an array.
  *
@@ -113,6 +137,73 @@ function stringToArray(string) {
   return string.match(reComplexSymbol);
 }
 
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Built-in value references. */
+var Symbol = root.Symbol;
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+function baseSlice(array, start, end) {
+  var index = -1,
+      length = array.length;
+
+  if (start < 0) {
+    start = -start > length ? 0 : (length + start);
+  }
+  end = end > length ? length : end;
+  if (end < 0) {
+    end += length;
+  }
+  length = start > end ? 0 : ((end - start) >>> 0);
+  start >>>= 0;
+
+  var result = Array(length);
+  while (++index < length) {
+    result[index] = array[index + start];
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+}
+
 /**
  * Casts `array` to a slice if it's needed.
  *
@@ -128,6 +219,81 @@ function castSlice(array, start, end) {
   return (!start && end >= length) ? array : baseSlice(array, start, end);
 }
 
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
 /**
  * Removes leading whitespace or specified characters from `string`.
  *
diff --git a/lodash.trimstart/package.json b/lodash.trimstart/package.json
index cd2f75096..57aa0a68d 100644
--- a/lodash.trimstart/package.json
+++ b/lodash.trimstart/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.trimstart",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.trimStart` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseslice": "~4.0.0",
-    "lodash._basetostring": "~4.12.0",
-    "lodash.tostring": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.union/README.md b/lodash.union/README.md
index 5a4fb54a9..b688cbf7e 100644
--- a/lodash.union/README.md
+++ b/lodash.union/README.md
@@ -1,4 +1,4 @@
-# lodash.union v4.4.0
+# lodash.union v4.5.0
 
 The [lodash](https://lodash.com/) method `_.union` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var union = require('lodash.union');
 ```
 
-See the [documentation](https://lodash.com/docs#union) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.union) for more details.
+See the [documentation](https://lodash.com/docs#union) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.union) for more details.
diff --git a/lodash.union/index.js b/lodash.union/index.js
index 5aa425b77..173148c3f 100644
--- a/lodash.union/index.js
+++ b/lodash.union/index.js
@@ -6,26 +6,171 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseFlatten = require('lodash._baseflatten'),
-    baseUniq = require('lodash._baseuniq'),
-    rest = require('lodash.rest');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
 /** Used as references for various `Number` constants. */
-var MAX_SAFE_INTEGER = 9007199254740991;
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
-var funcTag = '[object Function]',
+var argsTag = '[object Arguments]',
+    funcTag = '[object Function]',
     genTag = '[object GeneratorFunction]';
 
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
 
 /**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
- * of values.
+ * A faster alternative to `Function#apply`, this function invokes `func`
+ * with the `this` binding of `thisArg` and the arguments of `args`.
+ *
+ * @private
+ * @param {Function} func The function to invoke.
+ * @param {*} thisArg The `this` binding of `func`.
+ * @param {Array} args The arguments to invoke `func` with.
+ * @returns {*} Returns the result of `func`.
  */
-var objectToString = objectProto.toString;
+function apply(func, thisArg, args) {
+  switch (args.length) {
+    case 0: return func.call(thisArg);
+    case 1: return func.call(thisArg, args[0]);
+    case 2: return func.call(thisArg, args[0], args[1]);
+    case 3: return func.call(thisArg, args[0], args[1], args[2]);
+  }
+  return func.apply(thisArg, args);
+}
+
+/**
+ * A specialized version of `_.includes` for arrays without support for
+ * specifying an index to search from.
+ *
+ * @private
+ * @param {Array} [array] The array to search.
+ * @param {*} target The value to search for.
+ * @returns {boolean} Returns `true` if `target` is found, else `false`.
+ */
+function arrayIncludes(array, value) {
+  var length = array ? array.length : 0;
+  return !!length && baseIndexOf(array, value, 0) > -1;
+}
+
+/**
+ * This function is like `arrayIncludes` except that it accepts a comparator.
+ *
+ * @private
+ * @param {Array} [array] The array to search.
+ * @param {*} target The value to search for.
+ * @param {Function} comparator The comparator invoked per element.
+ * @returns {boolean} Returns `true` if `target` is found, else `false`.
+ */
+function arrayIncludesWith(array, value, comparator) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (comparator(value, array[index])) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * Appends the elements of `values` to `array`.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {Array} values The values to append.
+ * @returns {Array} Returns `array`.
+ */
+function arrayPush(array, values) {
+  var index = -1,
+      length = values.length,
+      offset = array.length;
+
+  while (++index < length) {
+    array[offset + index] = values[index];
+  }
+  return array;
+}
+
+/**
+ * The base implementation of `_.findIndex` and `_.findLastIndex` without
+ * support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {Function} predicate The function invoked per iteration.
+ * @param {number} fromIndex The index to search from.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function baseFindIndex(array, predicate, fromIndex, fromRight) {
+  var length = array.length,
+      index = fromIndex + (fromRight ? 1 : -1);
+
+  while ((fromRight ? index-- : ++index < length)) {
+    if (predicate(array[index], index, array)) {
+      return index;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} value The value to search for.
+ * @param {number} fromIndex The index to search from.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function baseIndexOf(array, value, fromIndex) {
+  if (value !== value) {
+    return baseFindIndex(array, baseIsNaN, fromIndex);
+  }
+  var index = fromIndex - 1,
+      length = array.length;
+
+  while (++index < length) {
+    if (array[index] === value) {
+      return index;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.isNaN` without support for number objects.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+ */
+function baseIsNaN(value) {
+  return value !== value;
+}
 
 /**
  * The base implementation of `_.property` without support for deep paths.
@@ -40,6 +185,635 @@ function baseProperty(key) {
   };
 }
 
+/**
+ * Checks if a cache value for `key` exists.
+ *
+ * @private
+ * @param {Object} cache The cache to query.
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function cacheHas(cache, key) {
+  return cache.has(key);
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice,
+    spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeMax = Math.max;
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    Set = getNative(root, 'Set'),
+    nativeCreate = getNative(Object, 'create');
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.flatten` with support for restricting flattening.
+ *
+ * @private
+ * @param {Array} array The array to flatten.
+ * @param {number} depth The maximum recursion depth.
+ * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
+ * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
+ * @param {Array} [result=[]] The initial result value.
+ * @returns {Array} Returns the new flattened array.
+ */
+function baseFlatten(array, depth, predicate, isStrict, result) {
+  var index = -1,
+      length = array.length;
+
+  predicate || (predicate = isFlattenable);
+  result || (result = []);
+
+  while (++index < length) {
+    var value = array[index];
+    if (depth > 0 && predicate(value)) {
+      if (depth > 1) {
+        // Recursively flatten arrays (susceptible to call stack limits).
+        baseFlatten(value, depth - 1, predicate, isStrict, result);
+      } else {
+        arrayPush(result, value);
+      }
+    } else if (!isStrict) {
+      result[result.length] = value;
+    }
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.rest` which doesn't validate or coerce arguments.
+ *
+ * @private
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @returns {Function} Returns the new function.
+ */
+function baseRest(func, start) {
+  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+  return function() {
+    var args = arguments,
+        index = -1,
+        length = nativeMax(args.length - start, 0),
+        array = Array(length);
+
+    while (++index < length) {
+      array[index] = args[start + index];
+    }
+    index = -1;
+    var otherArgs = Array(start + 1);
+    while (++index < start) {
+      otherArgs[index] = args[index];
+    }
+    otherArgs[start] = array;
+    return apply(func, this, otherArgs);
+  };
+}
+
+/**
+ * The base implementation of `_.uniqBy` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {Function} [iteratee] The iteratee invoked per element.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns the new duplicate free array.
+ */
+function baseUniq(array, iteratee, comparator) {
+  var index = -1,
+      includes = arrayIncludes,
+      length = array.length,
+      isCommon = true,
+      result = [],
+      seen = result;
+
+  if (comparator) {
+    isCommon = false;
+    includes = arrayIncludesWith;
+  }
+  else if (length >= LARGE_ARRAY_SIZE) {
+    var set = iteratee ? null : createSet(array);
+    if (set) {
+      return setToArray(set);
+    }
+    isCommon = false;
+    includes = cacheHas;
+    seen = new SetCache;
+  }
+  else {
+    seen = iteratee ? [] : result;
+  }
+  outer:
+  while (++index < length) {
+    var value = array[index],
+        computed = iteratee ? iteratee(value) : value;
+
+    value = (comparator || value !== 0) ? value : 0;
+    if (isCommon && computed === computed) {
+      var seenIndex = seen.length;
+      while (seenIndex--) {
+        if (seen[seenIndex] === computed) {
+          continue outer;
+        }
+      }
+      if (iteratee) {
+        seen.push(computed);
+      }
+      result.push(value);
+    }
+    else if (!includes(seen, computed, comparator)) {
+      if (seen !== result) {
+        seen.push(computed);
+      }
+      result.push(value);
+    }
+  }
+  return result;
+}
+
+/**
+ * Creates a set object of `values`.
+ *
+ * @private
+ * @param {Array} values The values to add to the set.
+ * @returns {Object} Returns the new set.
+ */
+var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {
+  return new Set(values);
+};
+
 /**
  * Gets the "length" property value of `object`.
  *
@@ -53,6 +827,90 @@ function baseProperty(key) {
  */
 var getLength = baseProperty('length');
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Checks if `value` is a flattenable `arguments` object or array.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
+ */
+function isFlattenable(value) {
+  return isArray(value) || isArguments(value) ||
+    !!(spreadableSymbol && value && value[spreadableSymbol]);
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Creates an array of unique values, in order, from all given arrays using
  * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
@@ -66,13 +924,98 @@ var getLength = baseProperty('length');
  * @returns {Array} Returns the new array of combined values.
  * @example
  *
- * _.union([2, 1], [4, 2], [1, 2]);
- * // => [2, 1, 4]
+ * _.union([2], [1, 2]);
+ * // => [2, 1]
  */
-var union = rest(function(arrays) {
+var union = baseRest(function(arrays) {
   return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
 });
 
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
 /**
  * Checks if `value` is array-like. A value is considered array-like if it's
  * not a function and has a `value.length` that's an integer greater than or
@@ -139,8 +1082,7 @@ function isArrayLikeObject(value) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -247,4 +1189,20 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
+/**
+ * This method returns `undefined`.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.3.0
+ * @category Util
+ * @example
+ *
+ * _.times(2, _.noop);
+ * // => [undefined, undefined]
+ */
+function noop() {
+  // No operation performed.
+}
+
 module.exports = union;
diff --git a/lodash.union/package.json b/lodash.union/package.json
index 32b9f8c16..5150fa077 100644
--- a/lodash.union/package.json
+++ b/lodash.union/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.union",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.union` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseflatten": "~4.2.0",
-    "lodash._baseuniq": "~4.6.0",
-    "lodash.rest": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.unionby/README.md b/lodash.unionby/README.md
index 1787f2019..4ee4766cc 100644
--- a/lodash.unionby/README.md
+++ b/lodash.unionby/README.md
@@ -1,4 +1,4 @@
-# lodash.unionby v4.4.0
+# lodash.unionby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.unionBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var unionBy = require('lodash.unionby');
 ```
 
-See the [documentation](https://lodash.com/docs#unionBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.unionby) for more details.
+See the [documentation](https://lodash.com/docs#unionBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.unionby) for more details.
diff --git a/lodash.unionby/index.js b/lodash.unionby/index.js
index a1a90c080..df599c05c 100644
--- a/lodash.unionby/index.js
+++ b/lodash.unionby/index.js
@@ -1,5 +1,5 @@
 /**
- * lodash 4.4.0 (Custom Build) <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
  * Copyright jQuery Foundation and other contributors <https://jquery.org/>
  * Released under MIT license <https://lodash.com/license>
@@ -33,7 +33,7 @@ var objectToString = objectProto.toString;
  *
  * @private
  * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new function.
+ * @returns {Function} Returns the new accessor function.
  */
 function baseProperty(key) {
   return function(object) {
diff --git a/lodash.unionby/package.json b/lodash.unionby/package.json
index 0877d720b..5becf4805 100644
--- a/lodash.unionby/package.json
+++ b/lodash.unionby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.unionby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.unionBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -17,7 +17,7 @@
   "dependencies": {
     "lodash._baseflatten": "~4.2.0",
     "lodash._baseiteratee": "~4.6.0",
-    "lodash._baseuniq": "~4.5.0",
+    "lodash._baseuniq": "~4.6.0",
     "lodash.rest": "^4.0.0"
   }
 }
diff --git a/lodash.unionwith/README.md b/lodash.unionwith/README.md
index 1f0ac9233..21c931cd7 100644
--- a/lodash.unionwith/README.md
+++ b/lodash.unionwith/README.md
@@ -1,4 +1,4 @@
-# lodash.unionwith v4.4.0
+# lodash.unionwith v4.5.0
 
 The [lodash](https://lodash.com/) method `_.unionWith` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var unionWith = require('lodash.unionwith');
 ```
 
-See the [documentation](https://lodash.com/docs#unionWith) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.unionwith) for more details.
+See the [documentation](https://lodash.com/docs#unionWith) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.unionwith) for more details.
diff --git a/lodash.unionwith/index.js b/lodash.unionwith/index.js
index a191da544..3b07e6a3a 100644
--- a/lodash.unionwith/index.js
+++ b/lodash.unionwith/index.js
@@ -6,26 +6,171 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseFlatten = require('lodash._baseflatten'),
-    baseUniq = require('lodash._baseuniq'),
-    rest = require('lodash.rest');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
 /** Used as references for various `Number` constants. */
-var MAX_SAFE_INTEGER = 9007199254740991;
+var INFINITY = 1 / 0,
+    MAX_SAFE_INTEGER = 9007199254740991;
 
 /** `Object#toString` result references. */
-var funcTag = '[object Function]',
+var argsTag = '[object Arguments]',
+    funcTag = '[object Function]',
     genTag = '[object GeneratorFunction]';
 
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
 
 /**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
- * of values.
+ * A faster alternative to `Function#apply`, this function invokes `func`
+ * with the `this` binding of `thisArg` and the arguments of `args`.
+ *
+ * @private
+ * @param {Function} func The function to invoke.
+ * @param {*} thisArg The `this` binding of `func`.
+ * @param {Array} args The arguments to invoke `func` with.
+ * @returns {*} Returns the result of `func`.
  */
-var objectToString = objectProto.toString;
+function apply(func, thisArg, args) {
+  switch (args.length) {
+    case 0: return func.call(thisArg);
+    case 1: return func.call(thisArg, args[0]);
+    case 2: return func.call(thisArg, args[0], args[1]);
+    case 3: return func.call(thisArg, args[0], args[1], args[2]);
+  }
+  return func.apply(thisArg, args);
+}
+
+/**
+ * A specialized version of `_.includes` for arrays without support for
+ * specifying an index to search from.
+ *
+ * @private
+ * @param {Array} [array] The array to search.
+ * @param {*} target The value to search for.
+ * @returns {boolean} Returns `true` if `target` is found, else `false`.
+ */
+function arrayIncludes(array, value) {
+  var length = array ? array.length : 0;
+  return !!length && baseIndexOf(array, value, 0) > -1;
+}
+
+/**
+ * This function is like `arrayIncludes` except that it accepts a comparator.
+ *
+ * @private
+ * @param {Array} [array] The array to search.
+ * @param {*} target The value to search for.
+ * @param {Function} comparator The comparator invoked per element.
+ * @returns {boolean} Returns `true` if `target` is found, else `false`.
+ */
+function arrayIncludesWith(array, value, comparator) {
+  var index = -1,
+      length = array ? array.length : 0;
+
+  while (++index < length) {
+    if (comparator(value, array[index])) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * Appends the elements of `values` to `array`.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {Array} values The values to append.
+ * @returns {Array} Returns `array`.
+ */
+function arrayPush(array, values) {
+  var index = -1,
+      length = values.length,
+      offset = array.length;
+
+  while (++index < length) {
+    array[offset + index] = values[index];
+  }
+  return array;
+}
+
+/**
+ * The base implementation of `_.findIndex` and `_.findLastIndex` without
+ * support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {Function} predicate The function invoked per iteration.
+ * @param {number} fromIndex The index to search from.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function baseFindIndex(array, predicate, fromIndex, fromRight) {
+  var length = array.length,
+      index = fromIndex + (fromRight ? 1 : -1);
+
+  while ((fromRight ? index-- : ++index < length)) {
+    if (predicate(array[index], index, array)) {
+      return index;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} value The value to search for.
+ * @param {number} fromIndex The index to search from.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function baseIndexOf(array, value, fromIndex) {
+  if (value !== value) {
+    return baseFindIndex(array, baseIsNaN, fromIndex);
+  }
+  var index = fromIndex - 1,
+      length = array.length;
+
+  while (++index < length) {
+    if (array[index] === value) {
+      return index;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.isNaN` without support for number objects.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+ */
+function baseIsNaN(value) {
+  return value !== value;
+}
 
 /**
  * The base implementation of `_.property` without support for deep paths.
@@ -40,6 +185,635 @@ function baseProperty(key) {
   };
 }
 
+/**
+ * Checks if a cache value for `key` exists.
+ *
+ * @private
+ * @param {Object} cache The cache to query.
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function cacheHas(cache, key) {
+  return cache.has(key);
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+function setToArray(set) {
+  var index = -1,
+      result = Array(set.size);
+
+  set.forEach(function(value) {
+    result[++index] = value;
+  });
+  return result;
+}
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable,
+    splice = arrayProto.splice,
+    spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeMax = Math.max;
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    Set = getNative(root, 'Set'),
+    nativeCreate = getNative(Object, 'create');
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+  var index = -1,
+      length = values ? values.length : 0;
+
+  this.__data__ = new MapCache;
+  while (++index < length) {
+    this.add(values[index]);
+  }
+}
+
+/**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+function setCacheAdd(value) {
+  this.__data__.set(value, HASH_UNDEFINED);
+  return this;
+}
+
+/**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+function setCacheHas(value) {
+  return this.__data__.has(value);
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+SetCache.prototype.has = setCacheHas;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
+/**
+ * The base implementation of `_.flatten` with support for restricting flattening.
+ *
+ * @private
+ * @param {Array} array The array to flatten.
+ * @param {number} depth The maximum recursion depth.
+ * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
+ * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
+ * @param {Array} [result=[]] The initial result value.
+ * @returns {Array} Returns the new flattened array.
+ */
+function baseFlatten(array, depth, predicate, isStrict, result) {
+  var index = -1,
+      length = array.length;
+
+  predicate || (predicate = isFlattenable);
+  result || (result = []);
+
+  while (++index < length) {
+    var value = array[index];
+    if (depth > 0 && predicate(value)) {
+      if (depth > 1) {
+        // Recursively flatten arrays (susceptible to call stack limits).
+        baseFlatten(value, depth - 1, predicate, isStrict, result);
+      } else {
+        arrayPush(result, value);
+      }
+    } else if (!isStrict) {
+      result[result.length] = value;
+    }
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.rest` which doesn't validate or coerce arguments.
+ *
+ * @private
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @returns {Function} Returns the new function.
+ */
+function baseRest(func, start) {
+  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+  return function() {
+    var args = arguments,
+        index = -1,
+        length = nativeMax(args.length - start, 0),
+        array = Array(length);
+
+    while (++index < length) {
+      array[index] = args[start + index];
+    }
+    index = -1;
+    var otherArgs = Array(start + 1);
+    while (++index < start) {
+      otherArgs[index] = args[index];
+    }
+    otherArgs[start] = array;
+    return apply(func, this, otherArgs);
+  };
+}
+
+/**
+ * The base implementation of `_.uniqBy` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {Function} [iteratee] The iteratee invoked per element.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns the new duplicate free array.
+ */
+function baseUniq(array, iteratee, comparator) {
+  var index = -1,
+      includes = arrayIncludes,
+      length = array.length,
+      isCommon = true,
+      result = [],
+      seen = result;
+
+  if (comparator) {
+    isCommon = false;
+    includes = arrayIncludesWith;
+  }
+  else if (length >= LARGE_ARRAY_SIZE) {
+    var set = iteratee ? null : createSet(array);
+    if (set) {
+      return setToArray(set);
+    }
+    isCommon = false;
+    includes = cacheHas;
+    seen = new SetCache;
+  }
+  else {
+    seen = iteratee ? [] : result;
+  }
+  outer:
+  while (++index < length) {
+    var value = array[index],
+        computed = iteratee ? iteratee(value) : value;
+
+    value = (comparator || value !== 0) ? value : 0;
+    if (isCommon && computed === computed) {
+      var seenIndex = seen.length;
+      while (seenIndex--) {
+        if (seen[seenIndex] === computed) {
+          continue outer;
+        }
+      }
+      if (iteratee) {
+        seen.push(computed);
+      }
+      result.push(value);
+    }
+    else if (!includes(seen, computed, comparator)) {
+      if (seen !== result) {
+        seen.push(computed);
+      }
+      result.push(value);
+    }
+  }
+  return result;
+}
+
+/**
+ * Creates a set object of `values`.
+ *
+ * @private
+ * @param {Array} values The values to add to the set.
+ * @returns {Object} Returns the new set.
+ */
+var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {
+  return new Set(values);
+};
+
 /**
  * Gets the "length" property value of `object`.
  *
@@ -53,6 +827,90 @@ function baseProperty(key) {
  */
 var getLength = baseProperty('length');
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * Checks if `value` is a flattenable `arguments` object or array.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
+ */
+function isFlattenable(value) {
+  return isArray(value) || isArguments(value) ||
+    !!(spreadableSymbol && value && value[spreadableSymbol]);
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Gets the last element of `array`.
  *
@@ -74,7 +932,8 @@ function last(array) {
 
 /**
  * This method is like `_.union` except that it accepts `comparator` which
- * is invoked to compare elements of `arrays`. The comparator is invoked
+ * is invoked to compare elements of `arrays`. Result values are chosen from
+ * the first array in which the value occurs. The comparator is invoked
  * with two arguments: (arrVal, othVal).
  *
  * @static
@@ -92,7 +951,7 @@ function last(array) {
  * _.unionWith(objects, others, _.isEqual);
  * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
  */
-var unionWith = rest(function(arrays) {
+var unionWith = baseRest(function(arrays) {
   var comparator = last(arrays);
   if (isArrayLikeObject(comparator)) {
     comparator = undefined;
@@ -100,6 +959,91 @@ var unionWith = rest(function(arrays) {
   return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);
 });
 
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
+/**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+function isArguments(value) {
+  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
+    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+}
+
+/**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+var isArray = Array.isArray;
+
 /**
  * Checks if `value` is array-like. A value is considered array-like if it's
  * not a function and has a `value.length` that's an integer greater than or
@@ -166,8 +1110,7 @@ function isArrayLikeObject(value) {
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -274,4 +1217,20 @@ function isObjectLike(value) {
   return !!value && typeof value == 'object';
 }
 
+/**
+ * This method returns `undefined`.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.3.0
+ * @category Util
+ * @example
+ *
+ * _.times(2, _.noop);
+ * // => [undefined, undefined]
+ */
+function noop() {
+  // No operation performed.
+}
+
 module.exports = unionWith;
diff --git a/lodash.unionwith/package.json b/lodash.unionwith/package.json
index e52436e17..3611d93fc 100644
--- a/lodash.unionwith/package.json
+++ b/lodash.unionwith/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.unionwith",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.unionWith` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,10 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseflatten": "~4.2.0",
-    "lodash._baseuniq": "~4.6.0",
-    "lodash.rest": "^4.0.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.uniq/README.md b/lodash.uniq/README.md
index 6572c2fa5..a662a5e38 100644
--- a/lodash.uniq/README.md
+++ b/lodash.uniq/README.md
@@ -1,4 +1,4 @@
-# lodash.uniq v4.4.0
+# lodash.uniq v4.5.0
 
 The [lodash](https://lodash.com/) method `_.uniq` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var uniq = require('lodash.uniq');
 ```
 
-See the [documentation](https://lodash.com/docs#uniq) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.uniq) for more details.
+See the [documentation](https://lodash.com/docs#uniq) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.uniq) for more details.
diff --git a/lodash.uniq/index.js b/lodash.uniq/index.js
index f0fd57ba2..83fce2bc4 100644
--- a/lodash.uniq/index.js
+++ b/lodash.uniq/index.js
@@ -22,7 +22,7 @@ var funcTag = '[object Function]',
 
 /**
  * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
@@ -43,7 +43,7 @@ var root = freeGlobal || freeSelf || Function('return this')();
  * specifying an index to search from.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
  */
@@ -56,7 +56,7 @@ function arrayIncludes(array, value) {
  * This function is like `arrayIncludes` except that it accepts a comparator.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @param {Function} comparator The comparator invoked per element.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
@@ -78,7 +78,7 @@ function arrayIncludesWith(array, value, comparator) {
  * support for iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {Function} predicate The function invoked per iteration.
  * @param {number} fromIndex The index to search from.
  * @param {boolean} [fromRight] Specify iterating from right to left.
@@ -100,7 +100,7 @@ function baseFindIndex(array, predicate, fromIndex, fromRight) {
  * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} value The value to search for.
  * @param {number} fromIndex The index to search from.
  * @returns {number} Returns the index of the matched value, else `-1`.
@@ -193,6 +193,7 @@ function setToArray(set) {
 
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
+    funcProto = Function.prototype,
     objectProto = Object.prototype;
 
 /** Used to detect overreaching core-js shims. */
@@ -205,14 +206,14 @@ var maskSrcKey = (function() {
 }());
 
 /** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
+var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -589,7 +590,7 @@ SetCache.prototype.has = setCacheHas;
  * Gets the index at which the `key` is found in `array` of key-value pairs.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} key The key to search for.
  * @returns {number} Returns the index of the matched value, else `-1`.
  */
@@ -765,7 +766,7 @@ function toSource(func) {
 
 /**
  * Creates a duplicate-free version of an array, using
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * for equality comparisons, in which only the first occurrence of each
  * element is kept.
  *
@@ -788,7 +789,7 @@ function uniq(array) {
 
 /**
  * Performs a
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * comparison between two values to determine if they are equivalent.
  *
  * @static
@@ -841,15 +842,14 @@ function eq(value, other) {
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
diff --git a/lodash.uniq/package.json b/lodash.uniq/package.json
index a305024d6..d43312344 100644
--- a/lodash.uniq/package.json
+++ b/lodash.uniq/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.uniq",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.uniq` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.uniqby/README.md b/lodash.uniqby/README.md
index 5ed3bdde1..da36d1281 100644
--- a/lodash.uniqby/README.md
+++ b/lodash.uniqby/README.md
@@ -1,4 +1,4 @@
-# lodash.uniqby v4.4.0
+# lodash.uniqby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.uniqBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var uniqBy = require('lodash.uniqby');
 ```
 
-See the [documentation](https://lodash.com/docs#uniqBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.uniqby) for more details.
+See the [documentation](https://lodash.com/docs#uniqBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.uniqby) for more details.
diff --git a/lodash.uniqby/package.json b/lodash.uniqby/package.json
index f5b0748c8..a5fde10a2 100644
--- a/lodash.uniqby/package.json
+++ b/lodash.uniqby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.uniqby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.uniqBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -15,7 +15,7 @@
   "repository": "lodash/lodash",
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
-    "lodash._baseiteratee": "~4.6.0",
+    "lodash._baseiteratee": "~4.7.0",
     "lodash._baseuniq": "~4.6.0"
   }
 }
diff --git a/lodash.uniqwith/README.md b/lodash.uniqwith/README.md
index 1611bb894..7758f08b9 100644
--- a/lodash.uniqwith/README.md
+++ b/lodash.uniqwith/README.md
@@ -1,4 +1,4 @@
-# lodash.uniqwith v4.4.0
+# lodash.uniqwith v4.5.0
 
 The [lodash](https://lodash.com/) method `_.uniqWith` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var uniqWith = require('lodash.uniqwith');
 ```
 
-See the [documentation](https://lodash.com/docs#uniqWith) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.uniqwith) for more details.
+See the [documentation](https://lodash.com/docs#uniqWith) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.uniqwith) for more details.
diff --git a/lodash.uniqwith/index.js b/lodash.uniqwith/index.js
index 276aa01d5..683fa2ff3 100644
--- a/lodash.uniqwith/index.js
+++ b/lodash.uniqwith/index.js
@@ -22,7 +22,7 @@ var funcTag = '[object Function]',
 
 /**
  * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
@@ -43,7 +43,7 @@ var root = freeGlobal || freeSelf || Function('return this')();
  * specifying an index to search from.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
  */
@@ -56,7 +56,7 @@ function arrayIncludes(array, value) {
  * This function is like `arrayIncludes` except that it accepts a comparator.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @param {Function} comparator The comparator invoked per element.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
@@ -78,7 +78,7 @@ function arrayIncludesWith(array, value, comparator) {
  * support for iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {Function} predicate The function invoked per iteration.
  * @param {number} fromIndex The index to search from.
  * @param {boolean} [fromRight] Specify iterating from right to left.
@@ -100,7 +100,7 @@ function baseFindIndex(array, predicate, fromIndex, fromRight) {
  * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} value The value to search for.
  * @param {number} fromIndex The index to search from.
  * @returns {number} Returns the index of the matched value, else `-1`.
@@ -193,6 +193,7 @@ function setToArray(set) {
 
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
+    funcProto = Function.prototype,
     objectProto = Object.prototype;
 
 /** Used to detect overreaching core-js shims. */
@@ -205,14 +206,14 @@ var maskSrcKey = (function() {
 }());
 
 /** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
+var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -589,7 +590,7 @@ SetCache.prototype.has = setCacheHas;
  * Gets the index at which the `key` is found in `array` of key-value pairs.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} key The key to search for.
  * @returns {number} Returns the index of the matched value, else `-1`.
  */
@@ -790,7 +791,7 @@ function uniqWith(array, comparator) {
 
 /**
  * Performs a
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * comparison between two values to determine if they are equivalent.
  *
  * @static
@@ -843,15 +844,14 @@ function eq(value, other) {
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
diff --git a/lodash.uniqwith/package.json b/lodash.uniqwith/package.json
index a0a6abe47..58a0053bc 100644
--- a/lodash.uniqwith/package.json
+++ b/lodash.uniqwith/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.uniqwith",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.uniqWith` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.unset/README.md b/lodash.unset/README.md
index 83034232c..08603929a 100644
--- a/lodash.unset/README.md
+++ b/lodash.unset/README.md
@@ -1,4 +1,4 @@
-# lodash.unset v4.4.0
+# lodash.unset v4.5.0
 
 The [lodash](https://lodash.com/) method `_.unset` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var unset = require('lodash.unset');
 ```
 
-See the [documentation](https://lodash.com/docs#unset) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.unset) for more details.
+See the [documentation](https://lodash.com/docs#unset) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.unset) for more details.
diff --git a/lodash.unset/index.js b/lodash.unset/index.js
index 5dd84f2fd..9df01c824 100644
--- a/lodash.unset/index.js
+++ b/lodash.unset/index.js
@@ -6,21 +6,107 @@
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var baseSlice = require('lodash._baseslice'),
-    stringToPath = require('lodash._stringtopath');
+
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
 /** Used as references for various `Number` constants. */
 var INFINITY = 1 / 0;
 
 /** `Object#toString` result references. */
-var symbolTag = '[object Symbol]';
+var funcTag = '[object Function]',
+    genTag = '[object GeneratorFunction]',
+    symbolTag = '[object Symbol]';
 
 /** Used to match property names within property paths. */
 var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
-    reIsPlainProp = /^\w*$/;
+    reIsPlainProp = /^\w*$/,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to match backslashes in property paths. */
+var reEscapeChar = /\\(\\)?/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+/**
+ * Checks if `value` is a host object in IE < 9.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
+ */
+function isHostObject(value) {
+  // Many host objects are `Object` objects that can coerce to strings
+  // despite having improperly defined `toString` methods.
+  var result = false;
+  if (value != null && typeof value.toString != 'function') {
+    try {
+      result = !!(value + '');
+    } catch (e) {}
+  }
+  return result;
+}
+
+/**
+ * Creates a function that invokes `func` with its first argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+function overArg(func, transform) {
+  return function(arg) {
+    return func(transform(arg));
+  };
+}
 
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var arrayProto = Array.prototype,
+    objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
@@ -32,9 +118,349 @@ var hasOwnProperty = objectProto.hasOwnProperty;
  */
 var objectToString = objectProto.toString;
 
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Symbol = root.Symbol,
+    splice = arrayProto.splice;
+
 /* Built-in method references for those with the same name as other `lodash` methods. */
 var nativeGetPrototype = Object.getPrototypeOf;
 
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+    nativeCreate = getNative(Object, 'create');
+
+/** Used to convert symbols to primitives and strings. */
+var symbolProto = Symbol ? Symbol.prototype : undefined,
+    symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+  this.__data__ = nativeCreate ? nativeCreate(null) : {};
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+  return this.has(key) && delete this.__data__[key];
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+  var data = this.__data__;
+  if (nativeCreate) {
+    var result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+  return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+  var data = this.__data__;
+  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+  var data = this.__data__;
+  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+  return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+  this.__data__ = [];
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    return false;
+  }
+  var lastIndex = data.length - 1;
+  if (index == lastIndex) {
+    data.pop();
+  } else {
+    splice.call(data, index, 1);
+  }
+  return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+  return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+  var data = this.__data__,
+      index = assocIndexOf(data, key);
+
+  if (index < 0) {
+    data.push([key, value]);
+  } else {
+    data[index][1] = value;
+  }
+  return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries ? entries.length : 0;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+  this.__data__ = {
+    'hash': new Hash,
+    'map': new (Map || ListCache),
+    'string': new Hash
+  };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+  return getMapData(this, key)['delete'](key);
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+  return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+  return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+  getMapData(this, key).set(key, value);
+  return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+  var length = array.length;
+  while (length--) {
+    if (eq(array[length][0], key)) {
+      return length;
+    }
+  }
+  return -1;
+}
+
 /**
  * The base implementation of `_.get` without support for default values.
  *
@@ -59,7 +485,7 @@ function baseGet(object, path) {
  * The base implementation of `_.has` without support for deep paths.
  *
  * @private
- * @param {Object} object The object to query.
+ * @param {Object} [object] The object to query.
  * @param {Array|string} key The key to check.
  * @returns {boolean} Returns `true` if `key` exists, else `false`.
  */
@@ -67,8 +493,75 @@ function baseHas(object, key) {
   // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
   // that are composed entirely of index properties, return `false` for
   // `hasOwnProperty` checks of them.
-  return hasOwnProperty.call(object, key) ||
-    (typeof object == 'object' && key in object && getPrototype(object) === null);
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+function baseSlice(array, start, end) {
+  var index = -1,
+      length = array.length;
+
+  if (start < 0) {
+    start = -start > length ? 0 : (length + start);
+  }
+  end = end > length ? length : end;
+  if (end < 0) {
+    end += length;
+  }
+  length = start > end ? 0 : ((end - start) >>> 0);
+  start >>>= 0;
+
+  var result = Array(length);
+  while (++index < length) {
+    result[index] = array[index + start];
+  }
+  return result;
+}
+
+/**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+function baseToString(value) {
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value == 'string') {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return symbolToString ? symbolToString.call(value) : '';
+  }
+  var result = (value + '');
+  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
 }
 
 /**
@@ -98,6 +591,34 @@ function castPath(value) {
   return isArray(value) ? value : stringToPath(value);
 }
 
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+  var data = map.__data__;
+  return isKeyable(key)
+    ? data[typeof key == 'string' ? 'string' : 'hash']
+    : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
+}
+
 /**
  * Gets the `[[Prototype]]` of `value`.
  *
@@ -105,9 +626,7 @@ function castPath(value) {
  * @param {*} value The value to query.
  * @returns {null|Object} Returns the `[[Prototype]]`.
  */
-function getPrototype(value) {
-  return nativeGetPrototype(Object(value));
-}
+var getPrototype = overArg(nativeGetPrototype, Object);
 
 /**
  * Checks if `value` is a property name and not a property path.
@@ -130,6 +649,31 @@ function isKey(value, object) {
     (object != null && value in Object(object));
 }
 
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+  var type = typeof value;
+  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+    ? (value !== '__proto__')
+    : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
 /**
  * Gets the parent value at `path` of `object`.
  *
@@ -142,6 +686,21 @@ function parent(object, path) {
   return path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
 }
 
+/**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+var stringToPath = memoize(function(string) {
+  var result = [];
+  toString(string).replace(rePropName, function(match, number, quote, string) {
+    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+  });
+  return result;
+});
+
 /**
  * Converts `value` to a string key if it's not a string or symbol.
  *
@@ -157,6 +716,25 @@ function toKey(value) {
   return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
 }
 
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (func != null) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+    try {
+      return (func + '');
+    } catch (e) {}
+  }
+  return '';
+}
+
 /**
  * Gets the last element of `array`.
  *
@@ -176,17 +754,118 @@ function last(array) {
   return length ? array[length - 1] : undefined;
 }
 
+/**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+function memoize(func, resolver) {
+  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
+    throw new TypeError(FUNC_ERROR_TEXT);
+  }
+  var memoized = function() {
+    var args = arguments,
+        key = resolver ? resolver.apply(this, args) : args[0],
+        cache = memoized.cache;
+
+    if (cache.has(key)) {
+      return cache.get(key);
+    }
+    var result = func.apply(this, args);
+    memoized.cache = cache.set(key, result);
+    return result;
+  };
+  memoized.cache = new (memoize.Cache || MapCache);
+  return memoized;
+}
+
+// Assign cache to `_.memoize`.
+memoize.Cache = MapCache;
+
+/**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+function eq(value, other) {
+  return value === other || (value !== value && other !== other);
+}
+
 /**
  * Checks if `value` is classified as an `Array` object.
  *
  * @static
  * @memberOf _
  * @since 0.1.0
- * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -203,6 +882,61 @@ function last(array) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+function isFunction(value) {
+  // The use of `Object#toString` avoids issues with the `typeof` operator
+  // in Safari 8 which returns 'object' for typed array and weak map constructors,
+  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  var tag = isObject(value) ? objectToString.call(value) : '';
+  return tag == funcTag || tag == genTag;
+}
+
+/**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+function isObject(value) {
+  var type = typeof value;
+  return !!value && (type == 'object' || type == 'function');
+}
+
 /**
  * Checks if `value` is object-like. A value is object-like if it's not `null`
  * and has a `typeof` result of "object".
@@ -239,8 +973,7 @@ function isObjectLike(value) {
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  * @example
  *
  * _.isSymbol(Symbol.iterator);
@@ -254,6 +987,31 @@ function isSymbol(value) {
     (isObjectLike(value) && objectToString.call(value) == symbolTag);
 }
 
+/**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+function toString(value) {
+  return value == null ? '' : baseToString(value);
+}
+
 /**
  * Removes the property at `path` of `object`.
  *
diff --git a/lodash.unset/package.json b/lodash.unset/package.json
index 5d3e415f7..2e8839a46 100644
--- a/lodash.unset/package.json
+++ b/lodash.unset/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.unset",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.unset` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -13,9 +13,5 @@
     "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
   ],
   "repository": "lodash/lodash",
-  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
-  "dependencies": {
-    "lodash._baseslice": "~4.0.0",
-    "lodash._stringtopath": "~4.8.0"
-  }
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" }
 }
diff --git a/lodash.xor/README.md b/lodash.xor/README.md
index 75c69c0f1..ad81364eb 100644
--- a/lodash.xor/README.md
+++ b/lodash.xor/README.md
@@ -1,4 +1,4 @@
-# lodash.xor v4.4.0
+# lodash.xor v4.5.0
 
 The [lodash](https://lodash.com/) method `_.xor` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var xor = require('lodash.xor');
 ```
 
-See the [documentation](https://lodash.com/docs#xor) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.xor) for more details.
+See the [documentation](https://lodash.com/docs#xor) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.xor) for more details.
diff --git a/lodash.xor/index.js b/lodash.xor/index.js
index 5a16bf653..c6fbce196 100644
--- a/lodash.xor/index.js
+++ b/lodash.xor/index.js
@@ -23,7 +23,7 @@ var funcTag = '[object Function]',
 
 /**
  * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
@@ -88,7 +88,7 @@ function arrayFilter(array, predicate) {
  * specifying an index to search from.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
  */
@@ -101,7 +101,7 @@ function arrayIncludes(array, value) {
  * This function is like `arrayIncludes` except that it accepts a comparator.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @param {Function} comparator The comparator invoked per element.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
@@ -162,7 +162,7 @@ function arrayPush(array, values) {
  * support for iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {Function} predicate The function invoked per iteration.
  * @param {number} fromIndex The index to search from.
  * @param {boolean} [fromRight] Specify iterating from right to left.
@@ -184,7 +184,7 @@ function baseFindIndex(array, predicate, fromIndex, fromRight) {
  * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} value The value to search for.
  * @param {number} fromIndex The index to search from.
  * @returns {number} Returns the index of the matched value, else `-1`.
@@ -215,19 +215,6 @@ function baseIsNaN(value) {
   return value !== value;
 }
 
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
 /**
  * The base implementation of `_.unary` without support for storing metadata.
  *
@@ -303,6 +290,7 @@ function setToArray(set) {
 
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
+    funcProto = Function.prototype,
     objectProto = Object.prototype;
 
 /** Used to detect overreaching core-js shims. */
@@ -315,14 +303,14 @@ var maskSrcKey = (function() {
 }());
 
 /** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
+var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -702,7 +690,7 @@ SetCache.prototype.has = setCacheHas;
  * Gets the index at which the `key` is found in `array` of key-value pairs.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} key The key to search for.
  * @returns {number} Returns the index of the matched value, else `-1`.
  */
@@ -914,19 +902,6 @@ var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop
   return new Set(values);
 };
 
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
 /**
  * Gets the data for `map`.
  *
@@ -1023,7 +998,7 @@ var xor = baseRest(function(arrays) {
 
 /**
  * Performs a
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * comparison between two values to determine if they are equivalent.
  *
  * @static
@@ -1083,7 +1058,7 @@ function eq(value, other) {
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -1134,8 +1109,7 @@ function isArrayLikeObject(value) {
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -1143,16 +1117,15 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);
@@ -1174,7 +1147,7 @@ function isLength(value) {
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
diff --git a/lodash.xor/package.json b/lodash.xor/package.json
index 1b52a6c3c..0c1297fc5 100644
--- a/lodash.xor/package.json
+++ b/lodash.xor/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.xor",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.xor` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
diff --git a/lodash.xorby/README.md b/lodash.xorby/README.md
index d19e6d01f..5b97fc30e 100644
--- a/lodash.xorby/README.md
+++ b/lodash.xorby/README.md
@@ -1,4 +1,4 @@
-# lodash.xorby v4.4.0
+# lodash.xorby v4.5.0
 
 The [lodash](https://lodash.com/) method `_.xorBy` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var xorBy = require('lodash.xorby');
 ```
 
-See the [documentation](https://lodash.com/docs#xorBy) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.xorby) for more details.
+See the [documentation](https://lodash.com/docs#xorBy) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.xorby) for more details.
diff --git a/lodash.xorby/package.json b/lodash.xorby/package.json
index ec9062253..18516ddd1 100644
--- a/lodash.xorby/package.json
+++ b/lodash.xorby/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.xorby",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.xorBy` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",
@@ -15,7 +15,7 @@
   "repository": "lodash/lodash",
   "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
   "dependencies": {
-    "lodash._baseiteratee": "~4.6.0",
+    "lodash._baseiteratee": "~4.7.0",
     "lodash._basexor": "~4.5.0",
     "lodash.rest": "^4.0.0"
   }
diff --git a/lodash.xorwith/README.md b/lodash.xorwith/README.md
index 727c4cb5b..0acf46e17 100644
--- a/lodash.xorwith/README.md
+++ b/lodash.xorwith/README.md
@@ -1,4 +1,4 @@
-# lodash.xorwith v4.4.0
+# lodash.xorwith v4.5.0
 
 The [lodash](https://lodash.com/) method `_.xorWith` exported as a [Node.js](https://nodejs.org/) module.
 
@@ -15,4 +15,4 @@ In Node.js:
 var xorWith = require('lodash.xorwith');
 ```
 
-See the [documentation](https://lodash.com/docs#xorWith) or [package source](https://github.com/lodash/lodash/blob/4.4.0-npm-packages/lodash.xorwith) for more details.
+See the [documentation](https://lodash.com/docs#xorWith) or [package source](https://github.com/lodash/lodash/blob/4.5.0-npm-packages/lodash.xorwith) for more details.
diff --git a/lodash.xorwith/index.js b/lodash.xorwith/index.js
index 45e3bed85..84219fa4e 100644
--- a/lodash.xorwith/index.js
+++ b/lodash.xorwith/index.js
@@ -23,7 +23,7 @@ var funcTag = '[object Function]',
 
 /**
  * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
@@ -88,7 +88,7 @@ function arrayFilter(array, predicate) {
  * specifying an index to search from.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
  */
@@ -101,7 +101,7 @@ function arrayIncludes(array, value) {
  * This function is like `arrayIncludes` except that it accepts a comparator.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @param {Function} comparator The comparator invoked per element.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
@@ -162,7 +162,7 @@ function arrayPush(array, values) {
  * support for iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {Function} predicate The function invoked per iteration.
  * @param {number} fromIndex The index to search from.
  * @param {boolean} [fromRight] Specify iterating from right to left.
@@ -184,7 +184,7 @@ function baseFindIndex(array, predicate, fromIndex, fromRight) {
  * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} value The value to search for.
  * @param {number} fromIndex The index to search from.
  * @returns {number} Returns the index of the matched value, else `-1`.
@@ -215,19 +215,6 @@ function baseIsNaN(value) {
   return value !== value;
 }
 
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
 /**
  * The base implementation of `_.unary` without support for storing metadata.
  *
@@ -303,6 +290,7 @@ function setToArray(set) {
 
 /** Used for built-in method references. */
 var arrayProto = Array.prototype,
+    funcProto = Function.prototype,
     objectProto = Object.prototype;
 
 /** Used to detect overreaching core-js shims. */
@@ -315,14 +303,14 @@ var maskSrcKey = (function() {
 }());
 
 /** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
+var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -702,7 +690,7 @@ SetCache.prototype.has = setCacheHas;
  * Gets the index at which the `key` is found in `array` of key-value pairs.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} key The key to search for.
  * @returns {number} Returns the index of the matched value, else `-1`.
  */
@@ -914,19 +902,6 @@ var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop
   return new Set(values);
 };
 
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
 /**
  * Gets the data for `map`.
  *
@@ -1048,7 +1023,7 @@ var xorWith = baseRest(function(arrays) {
 
 /**
  * Performs a
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * comparison between two values to determine if they are equivalent.
  *
  * @static
@@ -1108,7 +1083,7 @@ function eq(value, other) {
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -1159,8 +1134,7 @@ function isArrayLikeObject(value) {
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -1168,16 +1142,15 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);
@@ -1199,7 +1172,7 @@ function isLength(value) {
 
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
diff --git a/lodash.xorwith/package.json b/lodash.xorwith/package.json
index 4524a8f87..240faf6c6 100644
--- a/lodash.xorwith/package.json
+++ b/lodash.xorwith/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash.xorwith",
-  "version": "4.4.0",
+  "version": "4.5.0",
   "description": "The lodash method `_.xorWith` exported as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",