Bump to v4.7.0.

LICENSE

@@ -1,7 +1,17 @@
-Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
-Based on Underscore.js 1.7.0, copyright 2009-2015 Jeremy Ashkenas,
+Copyright jQuery Foundation and other contributors <https://jquery.org/>
+
+Based on Underscore.js, copyright Jeremy Ashkenas,
 DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>
 
+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 following license applies to all parts of this software except as
+documented below:
+
+====
+
 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
@@ -20,3 +30,18 @@ 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.

README.md

@@ -1,10 +1,10 @@
-# lodash-es v3.2.0
+# lodash-es v4.7.0
 
-The [modern build](https://github.com/lodash/lodash/wiki/Build-Differences) of [lodash](https://lodash.com/) exported as [ES](https://people.mozilla.org/~jorendorff/es6-draft.html) modules.
+The [lodash](https://lodash.com/) library exported as [ES](http://www.ecma-international.org/ecma-262/6.0/) modules.
 
 Generated using [lodash-cli](https://www.npmjs.com/package/lodash-cli):
 ```bash
-$ lodash modularize modern exports=es -o ./
+$ lodash modularize exports=es -o ./
 ```
 
-See the [package source](https://github.com/lodash/lodash/tree/3.2.0-es) for more details.
+See the [package source](https://github.com/lodash/lodash/tree/4.7.0-es) for more details.

_DataView.js

@@ -0,0 +1,7 @@
+import getNative from './_getNative';
+import root from './_root';
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView');
+
+export default DataView;

_Hash.js

@@ -0,0 +1,18 @@
+import nativeCreate from './_nativeCreate';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Creates an hash object.
+ *
+ * @private
+ * @constructor
+ * @returns {Object} Returns the new hash object.
+ */
+function Hash() {}
+
+// Avoid inheriting from `Object.prototype` when possible.
+Hash.prototype = nativeCreate ? nativeCreate(null) : objectProto;
+
+export default Hash;

_LazyWrapper.js

@@ -0,0 +1,28 @@
+import baseCreate from './_baseCreate';
+import baseLodash from './_baseLodash';
+
+/** Used as references for the maximum length and index of an array. */
+var MAX_ARRAY_LENGTH = 4294967295;
+
+/**
+ * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
+ *
+ * @private
+ * @constructor
+ * @param {*} value The value to wrap.
+ */
+function LazyWrapper(value) {
+  this.__wrapped__ = value;
+  this.__actions__ = [];
+  this.__dir__ = 1;
+  this.__filtered__ = false;
+  this.__iteratees__ = [];
+  this.__takeCount__ = MAX_ARRAY_LENGTH;
+  this.__views__ = [];
+}
+
+// Ensure `LazyWrapper` is an instance of `baseLodash`.
+LazyWrapper.prototype = baseCreate(baseLodash.prototype);
+LazyWrapper.prototype.constructor = LazyWrapper;
+
+export default LazyWrapper;

_LodashWrapper.js

@@ -0,0 +1,22 @@
+import baseCreate from './_baseCreate';
+import baseLodash from './_baseLodash';
+
+/**
+ * The base constructor for creating `lodash` wrapper objects.
+ *
+ * @private
+ * @param {*} value The value to wrap.
+ * @param {boolean} [chainAll] Enable explicit method chain sequences.
+ */
+function LodashWrapper(value, chainAll) {
+  this.__wrapped__ = value;
+  this.__actions__ = [];
+  this.__chain__ = !!chainAll;
+  this.__index__ = 0;
+  this.__values__ = undefined;
+}
+
+LodashWrapper.prototype = baseCreate(baseLodash.prototype);
+LodashWrapper.prototype.constructor = LodashWrapper;
+
+export default LodashWrapper;

_Map.js

@@ -0,0 +1,7 @@
+import getNative from './_getNative';
+import root from './_root';
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map');
+
+export default Map;

_MapCache.js

@@ -0,0 +1,32 @@
+import mapClear from './_mapClear';
+import mapDelete from './_mapDelete';
+import mapGet from './_mapGet';
+import mapHas from './_mapHas';
+import mapSet from './_mapSet';
+
+/**
+ * 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]);
+  }
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapClear;
+MapCache.prototype['delete'] = mapDelete;
+MapCache.prototype.get = mapGet;
+MapCache.prototype.has = mapHas;
+MapCache.prototype.set = mapSet;
+
+export default MapCache;

_Promise.js

@@ -0,0 +1,7 @@
+import getNative from './_getNative';
+import root from './_root';
+
+/* Built-in method references that are verified to be native. */
+var Promise = getNative(root, 'Promise');
+
+export default Promise;

_Reflect.js

@@ -0,0 +1,6 @@
+import root from './_root';
+
+/** Built-in value references. */
+var Reflect = root.Reflect;
+
+export default Reflect;

_Set.js

@@ -0,0 +1,7 @@
+import getNative from './_getNative';
+import root from './_root';
+
+/* Built-in method references that are verified to be native. */
+var Set = getNative(root, 'Set');
+
+export default Set;

_SetCache.js

@@ -0,0 +1,25 @@
+import MapCache from './_MapCache';
+import cachePush from './_cachePush';
+
+/**
+ *
+ * Creates a set 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.push(values[index]);
+  }
+}
+
+// Add methods to `SetCache`.
+SetCache.prototype.push = cachePush;
+
+export default SetCache;

_Stack.js

@@ -0,0 +1,32 @@
+import stackClear from './_stackClear';
+import stackDelete from './_stackDelete';
+import stackGet from './_stackGet';
+import stackHas from './_stackHas';
+import stackSet from './_stackSet';
+
+/**
+ * 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]);
+  }
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+export default Stack;

_Symbol.js

@@ -0,0 +1,6 @@
+import root from './_root';
+
+/** Built-in value references. */
+var Symbol = root.Symbol;
+
+export default Symbol;

_Uint8Array.js

@@ -0,0 +1,6 @@
+import root from './_root';
+
+/** Built-in value references. */
+var Uint8Array = root.Uint8Array;
+
+export default Uint8Array;

_WeakMap.js

@@ -0,0 +1,7 @@
+import getNative from './_getNative';
+import root from './_root';
+
+/* Built-in method references that are verified to be native. */
+var WeakMap = getNative(root, 'WeakMap');
+
+export default WeakMap;

_addMapEntry.js

@@ -0,0 +1,15 @@
+/**
+ * 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 doesn't return the map instance in IE 11.
+  map.set(pair[0], pair[1]);
+  return map;
+}
+
+export default addMapEntry;

_addSetEntry.js

@@ -0,0 +1,14 @@
+/**
+ * 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;
+}
+
+export default addSetEntry;

_apply.js

@@ -0,0 +1,22 @@
+/**
+ * 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 {...*} args The arguments to invoke `func` with.
+ * @returns {*} Returns the result of `func`.
+ */
+function apply(func, thisArg, args) {
+  var length = args.length;
+  switch (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);
+}
+
+export default apply;

_arrayAggregator.js

@@ -0,0 +1,22 @@
+/**
+ * A specialized version of `baseAggregator` for arrays.
+ *
+ * @private
+ * @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.
+ * @returns {Function} Returns `accumulator`.
+ */
+function arrayAggregator(array, setter, iteratee, accumulator) {
+  var index = -1,
+      length = array.length;
+
+  while (++index < length) {
+    var value = array[index];
+    setter(accumulator, value, iteratee(value), array);
+  }
+  return accumulator;
+}
+
+export default arrayAggregator;

_arrayConcat.js

@@ -0,0 +1,25 @@
+/**
+ * Creates a new array concatenating `array` with `other`.
+ *
+ * @private
+ * @param {Array} array The first array to concatenate.
+ * @param {Array} other The second array to concatenate.
+ * @returns {Array} Returns the new concatenated array.
+ */
+function arrayConcat(array, other) {
+  var index = -1,
+      length = array.length,
+      othIndex = -1,
+      othLength = other.length,
+      result = Array(length + othLength);
+
+  while (++index < length) {
+    result[index] = array[index];
+  }
+  while (++othIndex < othLength) {
+    result[index++] = other[othIndex];
+  }
+  return result;
+}
+
+export default arrayConcat;

_arrayEach.js

@@ -1,6 +1,6 @@
 /**
- * A specialized version of `_.forEach` for arrays without support for callback
- * shorthands or `this` binding.
+ * A specialized version of `_.forEach` for arrays without support for
+ * iteratee shorthands.
  *
  * @private
  * @param {Array} array The array to iterate over.

_arrayEachRight.js

@@ -1,6 +1,6 @@
 /**
  * A specialized version of `_.forEachRight` for arrays without support for
- * callback shorthands or `this` binding.
+ * iteratee shorthands.
  *
  * @private
  * @param {Array} array The array to iterate over.

_arrayEvery.js

@@ -1,6 +1,6 @@
 /**
- * A specialized version of `_.every` for arrays without support for callback
- * shorthands or `this` binding.
+ * A specialized version of `_.every` for arrays without support for
+ * iteratee shorthands.
  *
  * @private
  * @param {Array} array The array to iterate over.

_arrayFilter.js

@@ -1,6 +1,6 @@
 /**
- * A specialized version of `_.filter` for arrays without support for callback
- * shorthands or `this` binding.
+ * A specialized version of `_.filter` for arrays without support for
+ * iteratee shorthands.
  *
  * @private
  * @param {Array} array The array to iterate over.
@@ -10,13 +10,13 @@
 function arrayFilter(array, predicate) {
   var index = -1,
       length = array.length,
-      resIndex = -1,
+      resIndex = 0,
       result = [];
 
   while (++index < length) {
     var value = array[index];
     if (predicate(value, index, array)) {
-      result[++resIndex] = value;
+      result[resIndex++] = value;
     }
   }
   return result;

_arrayIncludes.js

@@ -0,0 +1,16 @@
+import baseIndexOf from './_baseIndexOf';
+
+/**
+ * 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) {
+  return !!array.length && baseIndexOf(array, value, 0) > -1;
+}
+
+export default arrayIncludes;

_arrayIncludesWith.js

@@ -0,0 +1,22 @@
+/**
+ * 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.length;
+
+  while (++index < length) {
+    if (comparator(value, array[index])) {
+      return true;
+    }
+  }
+  return false;
+}
+
+export default arrayIncludesWith;

_arrayMap.js

@@ -1,6 +1,6 @@
 /**
- * A specialized version of `_.map` for arrays without support for callback
- * shorthands or `this` binding.
+ * A specialized version of `_.map` for arrays without support for iteratee
+ * shorthands.
  *
  * @private
  * @param {Array} array The array to iterate over.

_arrayPush.js

@@ -0,0 +1,20 @@
+/**
+ * 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;
+}
+
+export default arrayPush;

_arrayReduce.js

@@ -1,20 +1,20 @@
 /**
- * A specialized version of `_.reduce` for arrays without support for callback
- * shorthands or `this` binding.
+ * 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} [initFromArray] Specify using the first element of `array`
- *  as 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, initFromArray) {
+function arrayReduce(array, iteratee, accumulator, initAccum) {
   var index = -1,
       length = array.length;
 
-  if (initFromArray && length) {
+  if (initAccum && length) {
     accumulator = array[++index];
   }
   while (++index < length) {

_arrayReduceRight.js

@@ -1,18 +1,18 @@
 /**
  * A specialized version of `_.reduceRight` for arrays without support for
- * callback shorthands or `this` binding.
+ * 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} [initFromArray] Specify using the last element of `array`
- *  as the initial value.
+ * @param {boolean} [initAccum] Specify using the last element of `array` as
+ *  the initial value.
  * @returns {*} Returns the accumulated value.
  */
-function arrayReduceRight(array, iteratee, accumulator, initFromArray) {
+function arrayReduceRight(array, iteratee, accumulator, initAccum) {
   var length = array.length;
-  if (initFromArray && length) {
+  if (initAccum && length) {
     accumulator = array[--length];
   }
   while (length--) {

_arraySome.js

@@ -1,6 +1,6 @@
 /**
- * A specialized version of `_.some` for arrays without support for callback
- * shorthands or `this` binding.
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
  *
  * @private
  * @param {Array} array The array to iterate over.

_assignInDefaults.js

@@ -0,0 +1,27 @@
+import eq from './eq';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * 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;
+}
+
+export default assignInDefaults;

_assignMergeValue.js

@@ -0,0 +1,19 @@
+import eq from './eq';
+
+/**
+ * This function is like `assignValue` except that it doesn't assign
+ * `undefined` values.
+ *
+ * @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 assignMergeValue(object, key, value) {
+  if ((value !== undefined && !eq(object[key], value)) ||
+      (typeof key == 'number' && value === undefined && !(key in object))) {
+    object[key] = value;
+  }
+}
+
+export default assignMergeValue;

_assignValue.js

@@ -0,0 +1,27 @@
+import eq from './eq';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * 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;
+  }
+}
+
+export default assignValue;

_assocDelete.js

@@ -0,0 +1,31 @@
+import assocIndexOf from './_assocIndexOf';
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype;
+
+/** Built-in value references. */
+var splice = arrayProto.splice;
+
+/**
+ * Removes `key` and its value from the associative array.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @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;
+}
+
+export default assocDelete;

_assocGet.js

@@ -0,0 +1,16 @@
+import assocIndexOf from './_assocIndexOf';
+
+/**
+ * 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];
+}
+
+export default assocGet;

_assocHas.js

@@ -0,0 +1,15 @@
+import assocIndexOf from './_assocIndexOf';
+
+/**
+ * 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;
+}
+
+export default assocHas;

_assocIndexOf.js

@@ -0,0 +1,21 @@
+import eq from './eq';
+
+/**
+ * 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;
+}
+
+export default assocIndexOf;

_assocSet.js

@@ -0,0 +1,20 @@
+import assocIndexOf from './_assocIndexOf';
+
+/**
+ * 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;
+  }
+}
+
+export default assocSet;

_baseAggregator.js

@@ -0,0 +1,21 @@
+import baseEach from './_baseEach';
+
+/**
+ * Aggregates elements of `collection` on `accumulator` with keys transformed
+ * by `iteratee` and values set by `setter`.
+ *
+ * @private
+ * @param {Array|Object} collection The collection 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.
+ * @returns {Function} Returns `accumulator`.
+ */
+function baseAggregator(collection, setter, iteratee, accumulator) {
+  baseEach(collection, function(value, key, collection) {
+    setter(accumulator, value, iteratee(value), collection);
+  });
+  return accumulator;
+}
+
+export default baseAggregator;

_baseAssign.js

@@ -0,0 +1,17 @@
+import copyObject from './_copyObject';
+import keys from './keys';
+
+/**
+ * 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);
+}
+
+export default baseAssign;

_baseAt.js

@@ -0,0 +1,23 @@
+import get from './get';
+
+/**
+ * The base implementation of `_.at` without support for individual paths.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {string[]} paths The property paths of elements to pick.
+ * @returns {Array} Returns the new array of picked elements.
+ */
+function baseAt(object, paths) {
+  var index = -1,
+      isNil = object == null,
+      length = paths.length,
+      result = Array(length);
+
+  while (++index < length) {
+    result[index] = isNil ? undefined : get(object, paths[index]);
+  }
+  return result;
+}
+
+export default baseAt;

_baseCastArrayLikeObject.js

@@ -0,0 +1,14 @@
+import isArrayLikeObject from './isArrayLikeObject';
+
+/**
+ * Casts `value` to an empty array if it's not an array like object.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array|Object} Returns the cast array-like object.
+ */
+function baseCastArrayLikeObject(value) {
+  return isArrayLikeObject(value) ? value : [];
+}
+
+export default baseCastArrayLikeObject;

_baseCastFunction.js

@@ -0,0 +1,14 @@
+import identity from './identity';
+
+/**
+ * Casts `value` to `identity` if it's not a function.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Function} Returns cast function.
+ */
+function baseCastFunction(value) {
+  return typeof value == 'function' ? value : identity;
+}
+
+export default baseCastFunction;

_baseCastKey.js

@@ -0,0 +1,14 @@
+import isSymbol from './isSymbol';
+
+/**
+ * Casts `value` to a string if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the cast key.
+ */
+function baseCastKey(key) {
+  return (typeof key == 'string' || isSymbol(key)) ? key : (key + '');
+}
+
+export default baseCastKey;

_baseCastPath.js

@@ -0,0 +1,15 @@
+import isArray from './isArray';
+import stringToPath from './_stringToPath';
+
+/**
+ * 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 baseCastPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+export default baseCastPath;

_baseClamp.js

@@ -0,0 +1,22 @@
+/**
+ * The base implementation of `_.clamp` which doesn't coerce arguments to numbers.
+ *
+ * @private
+ * @param {number} number The number to clamp.
+ * @param {number} [lower] The lower bound.
+ * @param {number} upper The upper bound.
+ * @returns {number} Returns the clamped number.
+ */
+function baseClamp(number, lower, upper) {
+  if (number === number) {
+    if (upper !== undefined) {
+      number = number <= upper ? number : upper;
+    }
+    if (lower !== undefined) {
+      number = number >= lower ? number : lower;
+    }
+  }
+  return number;
+}
+
+export default baseClamp;

_baseClone.js

@@ -0,0 +1,139 @@
+import Stack from './_Stack';
+import arrayEach from './_arrayEach';
+import assignValue from './_assignValue';
+import baseAssign from './_baseAssign';
+import cloneBuffer from './_cloneBuffer';
+import copyArray from './_copyArray';
+import copySymbols from './_copySymbols';
+import getAllKeys from './_getAllKeys';
+import getTag from './_getTag';
+import initCloneArray from './_initCloneArray';
+import initCloneByTag from './_initCloneByTag';
+import initCloneObject from './_initCloneObject';
+import isArray from './isArray';
+import isBuffer from './isBuffer';
+import isHostObject from './_isHostObject';
+import isObject from './isObject';
+import keys from './keys';
+
+/** `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]',
+    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 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;
+
+/**
+ * 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);
+  }
+  // Recursively populate clone (susceptible to call stack limits).
+  arrayEach(props || value, function(subValue, key) {
+    if (props) {
+      key = subValue;
+      subValue = value[key];
+    }
+    assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
+  });
+  return result;
+}
+
+export default baseClone;

_baseConforms.js

@@ -0,0 +1,33 @@
+import keys from './keys';
+
+/**
+ * The base implementation of `_.conforms` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property predicates to conform to.
+ * @returns {Function} Returns the new function.
+ */
+function baseConforms(source) {
+  var props = keys(source),
+      length = props.length;
+
+  return function(object) {
+    if (object == null) {
+      return !length;
+    }
+    var index = length;
+    while (index--) {
+      var key = props[index],
+          predicate = source[key],
+          value = object[key];
+
+      if ((value === undefined &&
+          !(key in Object(object))) || !predicate(value)) {
+        return false;
+      }
+    }
+    return true;
+  };
+}
+
+export default baseConforms;

_baseCreate.js

@@ -0,0 +1,18 @@
+import isObject from './isObject';
+
+/** Built-in value references. */
+var objectCreate = Object.create;
+
+/**
+ * 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) : {};
+}
+
+export default baseCreate;

_baseDelay.js

@@ -1,23 +1,21 @@
-import baseSlice from './baseSlice';
-
 /** Used as the `TypeError` message for "Functions" methods. */
 var FUNC_ERROR_TEXT = 'Expected a function';
 
 /**
- * The base implementation of `_.delay` and `_.defer` which accepts an index
- * of where to slice the arguments to provide to `func`.
+ * The base implementation of `_.delay` and `_.defer` which accepts an array
+ * of `func` arguments.
  *
  * @private
  * @param {Function} func The function to delay.
  * @param {number} wait The number of milliseconds to delay invocation.
- * @param {Object} args The `arguments` object to slice and provide to `func`.
+ * @param {Object} args The arguments to provide to `func`.
  * @returns {number} Returns the timer id.
  */
-function baseDelay(func, wait, args, fromIndex) {
+function baseDelay(func, wait, args) {
   if (typeof func != 'function') {
     throw new TypeError(FUNC_ERROR_TEXT);
   }
-  return setTimeout(function() { func.apply(undefined, baseSlice(args, fromIndex)); }, wait);
+  return setTimeout(function() { func.apply(undefined, args); }, wait);
 }
 
 export default baseDelay;

_baseDifference.js

@@ -0,0 +1,66 @@
+import SetCache from './_SetCache';
+import arrayIncludes from './_arrayIncludes';
+import arrayIncludesWith from './_arrayIncludesWith';
+import arrayMap from './_arrayMap';
+import baseUnary from './_baseUnary';
+import cacheHas from './_cacheHas';
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/**
+ * The base implementation of methods like `_.difference` without support
+ * for excluding multiple arrays or iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {Array} values The values to exclude.
+ * @param {Function} [iteratee] The iteratee invoked per element.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns the new array of filtered values.
+ */
+function baseDifference(array, values, iteratee, comparator) {
+  var index = -1,
+      includes = arrayIncludes,
+      isCommon = true,
+      length = array.length,
+      result = [],
+      valuesLength = values.length;
+
+  if (!length) {
+    return result;
+  }
+  if (iteratee) {
+    values = arrayMap(values, baseUnary(iteratee));
+  }
+  if (comparator) {
+    includes = arrayIncludesWith;
+    isCommon = false;
+  }
+  else if (values.length >= LARGE_ARRAY_SIZE) {
+    includes = cacheHas;
+    isCommon = false;
+    values = new SetCache(values);
+  }
+  outer:
+  while (++index < length) {
+    var value = array[index],
+        computed = iteratee ? iteratee(value) : value;
+
+    if (isCommon && computed === computed) {
+      var valuesIndex = valuesLength;
+      while (valuesIndex--) {
+        if (values[valuesIndex] === computed) {
+          continue outer;
+        }
+      }
+      result.push(value);
+    }
+    else if (!includes(values, computed, comparator)) {
+      result.push(value);
+    }
+  }
+  return result;
+}
+
+export default baseDifference;

_baseEach.js

@@ -0,0 +1,14 @@
+import baseForOwn from './_baseForOwn';
+import createBaseEach from './_createBaseEach';
+
+/**
+ * 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);
+
+export default baseEach;

_baseEachRight.js

@@ -0,0 +1,14 @@
+import baseForOwnRight from './_baseForOwnRight';
+import createBaseEach from './_createBaseEach';
+
+/**
+ * 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);
+
+export default baseEachRight;

_baseEvery.js

@@ -1,11 +1,10 @@
-import baseEach from './baseEach';
+import baseEach from './_baseEach';
 
 /**
- * The base implementation of `_.every` without support for callback
- * shorthands or `this` binding.
+ * The base implementation of `_.every` without support for iteratee shorthands.
  *
  * @private
- * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Array|Object} collection The collection to iterate over.
  * @param {Function} predicate The function invoked per iteration.
  * @returns {boolean} Returns `true` if all elements pass the predicate check,
  *  else `false`

_baseExtremum.js

@@ -0,0 +1,30 @@
+/**
+ * The base implementation of methods like `_.max` and `_.min` which accepts a
+ * `comparator` to determine the extremum value.
+ *
+ * @private
+ * @param {Array} array The array to iterate over.
+ * @param {Function} iteratee The iteratee invoked per iteration.
+ * @param {Function} comparator The comparator used to compare values.
+ * @returns {*} Returns the extremum value.
+ */
+function baseExtremum(array, iteratee, comparator) {
+  var index = -1,
+      length = array.length;
+
+  while (++index < length) {
+    var value = array[index],
+        current = iteratee(value);
+
+    if (current != null && (computed === undefined
+          ? current === current
+          : comparator(current, computed)
+        )) {
+      var computed = current,
+          result = value;
+    }
+  }
+  return result;
+}
+
+export default baseExtremum;

_baseFill.js

@@ -1,3 +1,6 @@
+import toInteger from './toInteger';
+import toLength from './toLength';
+
 /**
  * The base implementation of `_.fill` without an iteratee call guard.
  *
@@ -11,18 +14,16 @@
 function baseFill(array, value, start, end) {
   var length = array.length;
 
-  start = start == null ? 0 : (+start || 0);
+  start = toInteger(start);
   if (start < 0) {
     start = -start > length ? 0 : (length + start);
   }
-  end = (typeof end == 'undefined' || end > length) ? length : (+end || 0);
+  end = (end === undefined || end > length) ? length : toInteger(end);
   if (end < 0) {
     end += length;
   }
-  length = start > end ? 0 : end >>> 0;
-  start >>>= 0;
-
-  while (start < length) {
+  end = start > end ? 0 : toLength(end);
+  while (start < end) {
     array[start++] = value;
   }
   return array;

_baseFilter.js

@@ -1,11 +1,10 @@
-import baseEach from './baseEach';
+import baseEach from './_baseEach';
 
 /**
- * The base implementation of `_.filter` without support for callback
- * shorthands or `this` binding.
+ * The base implementation of `_.filter` without support for iteratee shorthands.
  *
  * @private
- * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Array|Object} collection The collection to iterate over.
  * @param {Function} predicate The function invoked per iteration.
  * @returns {Array} Returns the new filtered array.
  */

_baseFind.js

@@ -1,10 +1,10 @@
 /**
- * The base implementation of `_.find`, `_.findLast`, `_.findKey`, and `_.findLastKey`,
- * without support for callback shorthands and `this` binding, which iterates
- * over `collection` using the provided `eachFunc`.
+ * The base implementation of methods like `_.find` and `_.findKey`, without
+ * support for iteratee shorthands, which iterates over `collection` using
+ * `eachFunc`.
  *
  * @private
- * @param {Array|Object|string} collection The collection to search.
+ * @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`.
  * @param {boolean} [retKey] Specify returning the key of the found element

_baseFindIndex.js

@@ -0,0 +1,23 @@
+/**
+ * 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 {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function baseFindIndex(array, predicate, fromRight) {
+  var length = array.length,
+      index = fromRight ? length : -1;
+
+  while ((fromRight ? index-- : ++index < length)) {
+    if (predicate(array[index], index, array)) {
+      return index;
+    }
+  }
+  return -1;
+}
+
+export default baseFindIndex;

_baseFlatten.js

@@ -0,0 +1,39 @@
+import arrayPush from './_arrayPush';
+import isArguments from './isArguments';
+import isArray from './isArray';
+import isArrayLikeObject from './isArrayLikeObject';
+
+/**
+ * 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} [isStrict] Restrict flattening to arrays-like objects.
+ * @param {Array} [result=[]] The initial result value.
+ * @returns {Array} Returns the new flattened array.
+ */
+function baseFlatten(array, depth, isStrict, result) {
+  result || (result = []);
+
+  var index = -1,
+      length = array.length;
+
+  while (++index < length) {
+    var value = array[index];
+    if (depth > 0 && isArrayLikeObject(value) &&
+        (isStrict || isArray(value) || isArguments(value))) {
+      if (depth > 1) {
+        // Recursively flatten arrays (susceptible to call stack limits).
+        baseFlatten(value, depth - 1, isStrict, result);
+      } else {
+        arrayPush(result, value);
+      }
+    } else if (!isStrict) {
+      result[result.length] = value;
+    }
+  }
+  return result;
+}
+
+export default baseFlatten;

_baseFor.js

@@ -0,0 +1,16 @@
+import createBaseFor from './_createBaseFor';
+
+/**
+ * The base implementation of `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();
+
+export default baseFor;

_baseForOwn.js

@@ -1,9 +1,8 @@
-import baseFor from './baseFor';
-import keys from '../object/keys';
+import baseFor from './_baseFor';
+import keys from './keys';
 
 /**
- * The base implementation of `_.forOwn` without support for callback
- * shorthands and `this` binding.
+ * The base implementation of `_.forOwn` without support for iteratee shorthands.
  *
  * @private
  * @param {Object} object The object to iterate over.
@@ -11,7 +10,7 @@ import keys from '../object/keys';
  * @returns {Object} Returns `object`.
  */
 function baseForOwn(object, iteratee) {
-  return baseFor(object, iteratee, keys);
+  return object && baseFor(object, iteratee, keys);
 }
 
 export default baseForOwn;

_baseForOwnRight.js

@@ -1,9 +1,8 @@
-import baseForRight from './baseForRight';
-import keys from '../object/keys';
+import baseForRight from './_baseForRight';
+import keys from './keys';
 
 /**
- * The base implementation of `_.forOwnRight` without support for callback
- * shorthands and `this` binding.
+ * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
  *
  * @private
  * @param {Object} object The object to iterate over.
@@ -11,7 +10,7 @@ import keys from '../object/keys';
  * @returns {Object} Returns `object`.
  */
 function baseForOwnRight(object, iteratee) {
-  return baseForRight(object, iteratee, keys);
+  return object && baseForRight(object, iteratee, keys);
 }
 
 export default baseForOwnRight;

_baseForRight.js

@@ -1,4 +1,4 @@
-import toObject from './toObject';
+import createBaseFor from './_createBaseFor';
 
 /**
  * This function is like `baseFor` except that it iterates over properties
@@ -10,18 +10,6 @@ import toObject from './toObject';
  * @param {Function} keysFunc The function to get the keys of `object`.
  * @returns {Object} Returns `object`.
  */
-function baseForRight(object, iteratee, keysFunc) {
-  var iterable = toObject(object),
-      props = keysFunc(object),
-      length = props.length;
-
-  while (length--) {
-    var key = props[length];
-    if (iteratee(iterable[key], key, iterable) === false) {
-      break;
-    }
-  }
-  return object;
-}
+var baseForRight = createBaseFor(true);
 
 export default baseForRight;

_baseFunctions.js

@@ -0,0 +1,19 @@
+import arrayFilter from './_arrayFilter';
+import isFunction from './isFunction';
+
+/**
+ * The base implementation of `_.functions` which creates an array of
+ * `object` function property names filtered from `props`.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Array} props The property names to filter.
+ * @returns {Array} Returns the new array of filtered property names.
+ */
+function baseFunctions(object, props) {
+  return arrayFilter(props, function(key) {
+    return isFunction(object[key]);
+  });
+}
+
+export default baseFunctions;

_baseGet.js

@@ -0,0 +1,24 @@
+import baseCastPath from './_baseCastPath';
+import isKey from './_isKey';
+
+/**
+ * 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] : baseCastPath(path);
+
+  var index = 0,
+      length = path.length;
+
+  while (object != null && index < length) {
+    object = object[path[index++]];
+  }
+  return (index && index == length) ? object : undefined;
+}
+
+export default baseGet;

_baseGetAllKeys.js

@@ -0,0 +1,22 @@
+import arrayPush from './_arrayPush';
+import isArray from './isArray';
+
+/**
+ * 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));
+}
+
+export default baseGetAllKeys;

_baseHas.js

@@ -0,0 +1,25 @@
+import getPrototype from './_getPrototype';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * 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);
+}
+
+export default baseHas;

_baseHasIn.js

@@ -0,0 +1,13 @@
+/**
+ * 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);
+}
+
+export default baseHasIn;

_baseInRange.js

@@ -0,0 +1,18 @@
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeMax = Math.max,
+    nativeMin = Math.min;
+
+/**
+ * The base implementation of `_.inRange` which doesn't coerce arguments to numbers.
+ *
+ * @private
+ * @param {number} number The number to check.
+ * @param {number} start The start of the range.
+ * @param {number} end The end of the range.
+ * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
+ */
+function baseInRange(number, start, end) {
+  return number >= nativeMin(start, end) && number < nativeMax(start, end);
+}
+
+export default baseInRange;

_baseIndexOf.js

@@ -1,19 +1,19 @@
-import indexOfNaN from './indexOfNaN';
+import indexOfNaN from './_indexOfNaN';
 
 /**
- * The base implementation of `_.indexOf` without support for binary searches.
+ * 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=0] The index to search from.
+ * @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 indexOfNaN(array, fromIndex);
   }
-  var index = (fromIndex || 0) - 1,
+  var index = fromIndex - 1,
       length = array.length;
 
   while (++index < length) {

_baseIndexOfWith.js

@@ -0,0 +1,23 @@
+/**
+ * This function is like `baseIndexOf` except that it accepts a comparator.
+ *
+ * @private
+ * @param {Array} array The array to search.
+ * @param {*} value The value to search for.
+ * @param {number} fromIndex The index to search from.
+ * @param {Function} comparator The comparator invoked per element.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function baseIndexOfWith(array, value, fromIndex, comparator) {
+  var index = fromIndex - 1,
+      length = array.length;
+
+  while (++index < length) {
+    if (comparator(array[index], value)) {
+      return index;
+    }
+  }
+  return -1;
+}
+
+export default baseIndexOfWith;

_baseIntersection.js

@@ -0,0 +1,73 @@
+import SetCache from './_SetCache';
+import arrayIncludes from './_arrayIncludes';
+import arrayIncludesWith from './_arrayIncludesWith';
+import arrayMap from './_arrayMap';
+import baseUnary from './_baseUnary';
+import cacheHas from './_cacheHas';
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeMin = Math.min;
+
+/**
+ * The base implementation of methods like `_.intersection`, without support
+ * for iteratee shorthands, that accepts an array of arrays to inspect.
+ *
+ * @private
+ * @param {Array} arrays The arrays to inspect.
+ * @param {Function} [iteratee] The iteratee invoked per element.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns the new array of shared values.
+ */
+function baseIntersection(arrays, iteratee, comparator) {
+  var includes = comparator ? arrayIncludesWith : arrayIncludes,
+      length = arrays[0].length,
+      othLength = arrays.length,
+      othIndex = othLength,
+      caches = Array(othLength),
+      maxLength = Infinity,
+      result = [];
+
+  while (othIndex--) {
+    var array = arrays[othIndex];
+    if (othIndex && iteratee) {
+      array = arrayMap(array, baseUnary(iteratee));
+    }
+    maxLength = nativeMin(array.length, maxLength);
+    caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))
+      ? new SetCache(othIndex && array)
+      : undefined;
+  }
+  array = arrays[0];
+
+  var index = -1,
+      seen = caches[0];
+
+  outer:
+  while (++index < length && result.length < maxLength) {
+    var value = array[index],
+        computed = iteratee ? iteratee(value) : value;
+
+    if (!(seen
+          ? cacheHas(seen, computed)
+          : includes(result, computed, comparator)
+        )) {
+      othIndex = othLength;
+      while (--othIndex) {
+        var cache = caches[othIndex];
+        if (!(cache
+              ? cacheHas(cache, computed)
+              : includes(arrays[othIndex], computed, comparator))
+            ) {
+          continue outer;
+        }
+      }
+      if (seen) {
+        seen.push(computed);
+      }
+      result.push(value);
+    }
+  }
+  return result;
+}
+
+export default baseIntersection;

_baseInverter.js

@@ -0,0 +1,21 @@
+import baseForOwn from './_baseForOwn';
+
+/**
+ * The base implementation of `_.invert` and `_.invertBy` which inverts
+ * `object` with values transformed by `iteratee` and set by `setter`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} setter The function to set `accumulator` values.
+ * @param {Function} iteratee The iteratee to transform values.
+ * @param {Object} accumulator The initial inverted object.
+ * @returns {Function} Returns `accumulator`.
+ */
+function baseInverter(object, setter, iteratee, accumulator) {
+  baseForOwn(object, function(value, key, object) {
+    setter(accumulator, iteratee(value), key, object);
+  });
+  return accumulator;
+}
+
+export default baseInverter;

_baseInvoke.js

@@ -0,0 +1,27 @@
+import apply from './_apply';
+import baseCastPath from './_baseCastPath';
+import isKey from './_isKey';
+import last from './last';
+import parent from './_parent';
+
+/**
+ * The base implementation of `_.invoke` without support for individual
+ * method arguments.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the method to invoke.
+ * @param {Array} args The arguments to invoke the method with.
+ * @returns {*} Returns the result of the invoked method.
+ */
+function baseInvoke(object, path, args) {
+  if (!isKey(path, object)) {
+    path = baseCastPath(path);
+    object = parent(object, path);
+    path = last(path);
+  }
+  var func = object == null ? object : object[path];
+  return func == null ? undefined : apply(func, object, args);
+}
+
+export default baseInvoke;

_baseIsEqual.js

@@ -0,0 +1,30 @@
+import baseIsEqualDeep from './_baseIsEqualDeep';
+import isObject from './isObject';
+import isObjectLike from './isObjectLike';
+
+/**
+ * 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);
+}
+
+export default baseIsEqual;

_baseIsEqualDeep.js

@@ -0,0 +1,82 @@
+import Stack from './_Stack';
+import equalArrays from './_equalArrays';
+import equalByTag from './_equalByTag';
+import equalObjects from './_equalObjects';
+import getTag from './_getTag';
+import isArray from './isArray';
+import isHostObject from './_isHostObject';
+import isTypedArray from './isTypedArray';
+
+/** Used to compose bitmasks for comparison styles. */
+var PARTIAL_COMPARE_FLAG = 2;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    objectTag = '[object Object]';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * 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);
+}
+
+export default baseIsEqualDeep;

_baseIsMatch.js

@@ -0,0 +1,62 @@
+import Stack from './_Stack';
+import baseIsEqual from './_baseIsEqual';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/**
+ * 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;
+}
+
+export default baseIsMatch;

_baseIteratee.js

@@ -0,0 +1,31 @@
+import baseMatches from './_baseMatches';
+import baseMatchesProperty from './_baseMatchesProperty';
+import identity from './identity';
+import isArray from './isArray';
+import property from './property';
+
+/**
+ * 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);
+}
+
+export default baseIteratee;

_baseKeys.js

@@ -0,0 +1,16 @@
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeKeys = Object.keys;
+
+/**
+ * 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));
+}
+
+export default baseKeys;

_baseKeysIn.js

@@ -0,0 +1,36 @@
+import Reflect from './_Reflect';
+import iteratorToArray from './_iteratorToArray';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Built-in value references. */
+var enumerate = Reflect ? Reflect.enumerate : undefined,
+    propertyIsEnumerable = objectProto.propertyIsEnumerable;
+
+/**
+ * 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));
+  };
+}
+
+export default baseKeysIn;

_baseLodash.js

@@ -0,0 +1,10 @@
+/**
+ * The function whose prototype chain sequence wrappers inherit from.
+ *
+ * @private
+ */
+function baseLodash() {
+  // No operation performed.
+}
+
+export default baseLodash;

_baseMap.js

@@ -0,0 +1,22 @@
+import baseEach from './_baseEach';
+import isArrayLike from './isArrayLike';
+
+/**
+ * The base implementation of `_.map` 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} Returns the new mapped array.
+ */
+function baseMap(collection, iteratee) {
+  var index = -1,
+      result = isArrayLike(collection) ? Array(collection.length) : [];
+
+  baseEach(collection, function(value, key, collection) {
+    result[++index] = iteratee(value, key, collection);
+  });
+  return result;
+}
+
+export default baseMap;

_baseMatches.js

@@ -0,0 +1,30 @@
+import baseIsMatch from './_baseIsMatch';
+import getMatchData from './_getMatchData';
+
+/**
+ * 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 function.
+ */
+function baseMatches(source) {
+  var matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    var key = matchData[0][0],
+        value = matchData[0][1];
+
+    return function(object) {
+      if (object == null) {
+        return false;
+      }
+      return object[key] === value &&
+        (value !== undefined || (key in Object(object)));
+    };
+  }
+  return function(object) {
+    return object === source || baseIsMatch(object, source, matchData);
+  };
+}
+
+export default baseMatches;

_baseMatchesProperty.js

@@ -0,0 +1,26 @@
+import baseIsEqual from './_baseIsEqual';
+import get from './get';
+import hasIn from './hasIn';
+
+/** Used to compose bitmasks for comparison styles. */
+var UNORDERED_COMPARE_FLAG = 1,
+    PARTIAL_COMPARE_FLAG = 2;
+
+/**
+ * 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 function.
+ */
+function baseMatchesProperty(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);
+  };
+}
+
+export default baseMatchesProperty;

_baseMean.js

@@ -0,0 +1,20 @@
+import baseSum from './_baseSum';
+
+/** Used as references for various `Number` constants. */
+var NAN = 0 / 0;
+
+/**
+ * The base implementation of `_.mean` and `_.meanBy` without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {number} Returns the mean.
+ */
+function baseMean(array, iteratee) {
+  var length = array ? array.length : 0;
+  return length ? (baseSum(array, iteratee) / length) : NAN;
+}
+
+export default baseMean;

_baseMerge.js

@@ -0,0 +1,50 @@
+import Stack from './_Stack';
+import arrayEach from './_arrayEach';
+import assignMergeValue from './_assignMergeValue';
+import baseMergeDeep from './_baseMergeDeep';
+import isArray from './isArray';
+import isObject from './isObject';
+import isTypedArray from './isTypedArray';
+import keysIn from './keysIn';
+
+/**
+ * The base implementation of `_.merge` without support for multiple sources.
+ *
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @param {number} srcIndex The index of `source`.
+ * @param {Function} [customizer] The function to customize merged values.
+ * @param {Object} [stack] Tracks traversed source values and their merged
+ *  counterparts.
+ */
+function baseMerge(object, source, srcIndex, customizer, stack) {
+  if (object === source) {
+    return;
+  }
+  if (!(isArray(source) || isTypedArray(source))) {
+    var props = keysIn(source);
+  }
+  arrayEach(props || source, function(srcValue, key) {
+    if (props) {
+      key = srcValue;
+      srcValue = source[key];
+    }
+    if (isObject(srcValue)) {
+      stack || (stack = new Stack);
+      baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
+    }
+    else {
+      var newValue = customizer
+        ? customizer(object[key], srcValue, (key + ''), object, source, stack)
+        : undefined;
+
+      if (newValue === undefined) {
+        newValue = srcValue;
+      }
+      assignMergeValue(object, key, newValue);
+    }
+  });
+}
+
+export default baseMerge;

_baseMergeDeep.js

@@ -0,0 +1,83 @@
+import assignMergeValue from './_assignMergeValue';
+import baseClone from './_baseClone';
+import copyArray from './_copyArray';
+import isArguments from './isArguments';
+import isArray from './isArray';
+import isArrayLikeObject from './isArrayLikeObject';
+import isFunction from './isFunction';
+import isObject from './isObject';
+import isPlainObject from './isPlainObject';
+import isTypedArray from './isTypedArray';
+import toPlainObject from './toPlainObject';
+
+/**
+ * A specialized version of `baseMerge` for arrays and objects which performs
+ * deep merges and tracks traversed objects enabling objects with circular
+ * references to be merged.
+ *
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @param {string} key The key of the value to merge.
+ * @param {number} srcIndex The index of `source`.
+ * @param {Function} mergeFunc The function to merge values.
+ * @param {Function} [customizer] The function to customize assigned values.
+ * @param {Object} [stack] Tracks traversed source values and their merged
+ *  counterparts.
+ */
+function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
+  var objValue = object[key],
+      srcValue = source[key],
+      stacked = stack.get(srcValue);
+
+  if (stacked) {
+    assignMergeValue(object, key, stacked);
+    return;
+  }
+  var newValue = customizer
+    ? customizer(objValue, srcValue, (key + ''), object, source, stack)
+    : undefined;
+
+  var isCommon = newValue === undefined;
+
+  if (isCommon) {
+    newValue = srcValue;
+    if (isArray(srcValue) || isTypedArray(srcValue)) {
+      if (isArray(objValue)) {
+        newValue = objValue;
+      }
+      else if (isArrayLikeObject(objValue)) {
+        newValue = copyArray(objValue);
+      }
+      else {
+        isCommon = false;
+        newValue = baseClone(srcValue, true);
+      }
+    }
+    else if (isPlainObject(srcValue) || isArguments(srcValue)) {
+      if (isArguments(objValue)) {
+        newValue = toPlainObject(objValue);
+      }
+      else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
+        isCommon = false;
+        newValue = baseClone(srcValue, true);
+      }
+      else {
+        newValue = objValue;
+      }
+    }
+    else {
+      isCommon = false;
+    }
+  }
+  stack.set(srcValue, newValue);
+
+  if (isCommon) {
+    // Recursively merge objects and arrays (susceptible to call stack limits).
+    mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
+  }
+  stack['delete'](srcValue);
+  assignMergeValue(object, key, newValue);
+}
+
+export default baseMergeDeep;

_baseOrderBy.js

@@ -0,0 +1,33 @@
+import arrayMap from './_arrayMap';
+import baseIteratee from './_baseIteratee';
+import baseMap from './_baseMap';
+import baseSortBy from './_baseSortBy';
+import compareMultiple from './_compareMultiple';
+import identity from './identity';
+
+/**
+ * The base implementation of `_.orderBy` without param guards.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
+ * @param {string[]} orders The sort orders of `iteratees`.
+ * @returns {Array} Returns the new sorted array.
+ */
+function baseOrderBy(collection, iteratees, orders) {
+  var index = -1;
+  iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseIteratee);
+
+  var result = baseMap(collection, function(value, key, collection) {
+    var criteria = arrayMap(iteratees, function(iteratee) {
+      return iteratee(value);
+    });
+    return { 'criteria': criteria, 'index': ++index, 'value': value };
+  });
+
+  return baseSortBy(result, function(object, other) {
+    return compareMultiple(object, other, orders);
+  });
+}
+
+export default baseOrderBy;

_basePick.js

@@ -0,0 +1,22 @@
+import arrayReduce from './_arrayReduce';
+
+/**
+ * The base implementation of `_.pick` without support for individual
+ * property identifiers.
+ *
+ * @private
+ * @param {Object} object The source object.
+ * @param {string[]} props The property identifiers to pick.
+ * @returns {Object} Returns the new object.
+ */
+function basePick(object, props) {
+  object = Object(object);
+  return arrayReduce(props, function(result, key) {
+    if (key in object) {
+      result[key] = object[key];
+    }
+    return result;
+  }, {});
+}
+
+export default basePick;

_basePickBy.js

@@ -0,0 +1,28 @@
+import getAllKeysIn from './_getAllKeysIn';
+
+/**
+ * The base implementation of  `_.pickBy` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The source object.
+ * @param {Function} predicate The function invoked per property.
+ * @returns {Object} Returns the new object.
+ */
+function basePickBy(object, predicate) {
+  var index = -1,
+      props = getAllKeysIn(object),
+      length = props.length,
+      result = {};
+
+  while (++index < length) {
+    var key = props[index],
+        value = object[key];
+
+    if (predicate(value, key)) {
+      result[key] = value;
+    }
+  }
+  return result;
+}
+
+export default basePickBy;

_baseProperty.js

@@ -1,5 +1,5 @@
 /**
- * The base implementation of `_.property` which does not coerce `key` to a string.
+ * The base implementation of `_.property` without support for deep paths.
  *
  * @private
  * @param {string} key The key of the property to get.

_basePropertyDeep.js

@@ -0,0 +1,16 @@
+import baseGet from './_baseGet';
+
+/**
+ * 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 function.
+ */
+function basePropertyDeep(path) {
+  return function(object) {
+    return baseGet(object, path);
+  };
+}
+
+export default basePropertyDeep;

_basePullAll.js

@@ -0,0 +1,47 @@
+import arrayMap from './_arrayMap';
+import baseIndexOf from './_baseIndexOf';
+import baseIndexOfWith from './_baseIndexOfWith';
+import baseUnary from './_baseUnary';
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype;
+
+/** Built-in value references. */
+var splice = arrayProto.splice;
+
+/**
+ * The base implementation of `_.pullAllBy` without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {Array} values The values to remove.
+ * @param {Function} [iteratee] The iteratee invoked per element.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns `array`.
+ */
+function basePullAll(array, values, iteratee, comparator) {
+  var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
+      index = -1,
+      length = values.length,
+      seen = array;
+
+  if (iteratee) {
+    seen = arrayMap(array, baseUnary(iteratee));
+  }
+  while (++index < length) {
+    var fromIndex = 0,
+        value = values[index],
+        computed = iteratee ? iteratee(value) : value;
+
+    while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
+      if (seen !== array) {
+        splice.call(seen, fromIndex, 1);
+      }
+      splice.call(array, fromIndex, 1);
+    }
+  }
+  return array;
+}
+
+export default basePullAll;

_basePullAt.js

@@ -0,0 +1,49 @@
+import baseCastPath from './_baseCastPath';
+import isIndex from './_isIndex';
+import isKey from './_isKey';
+import last from './last';
+import parent from './_parent';
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype;
+
+/** Built-in value references. */
+var splice = arrayProto.splice;
+
+/**
+ * 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 (lastIndex == length || index != previous) {
+      var previous = index;
+      if (isIndex(index)) {
+        splice.call(array, index, 1);
+      }
+      else if (!isKey(index, array)) {
+        var path = baseCastPath(index),
+            object = parent(array, path);
+
+        if (object != null) {
+          delete object[last(path)];
+        }
+      }
+      else {
+        delete array[index];
+      }
+    }
+  }
+  return array;
+}
+
+export default basePullAt;

_baseRandom.js

@@ -0,0 +1,18 @@
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeFloor = Math.floor,
+    nativeRandom = Math.random;
+
+/**
+ * The base implementation of `_.random` without support for returning
+ * floating-point numbers.
+ *
+ * @private
+ * @param {number} lower The lower bound.
+ * @param {number} upper The upper bound.
+ * @returns {number} Returns the random number.
+ */
+function baseRandom(lower, upper) {
+  return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
+}
+
+export default baseRandom;

_baseRange.js

@@ -0,0 +1,28 @@
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeCeil = Math.ceil,
+    nativeMax = Math.max;
+
+/**
+ * The base implementation of `_.range` and `_.rangeRight` which doesn't
+ * coerce arguments to numbers.
+ *
+ * @private
+ * @param {number} start The start of the range.
+ * @param {number} end The end of the range.
+ * @param {number} step The value to increment or decrement by.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Array} Returns the new array of numbers.
+ */
+function baseRange(start, end, step, fromRight) {
+  var index = -1,
+      length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
+      result = Array(length);
+
+  while (length--) {
+    result[fromRight ? length : ++index] = start;
+    start += step;
+  }
+  return result;
+}
+
+export default baseRange;

_baseReduce.js

@@ -0,0 +1,23 @@
+/**
+ * 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;
+}
+
+export default baseReduce;