Bump to v4.16.4.

README.md

@@ -1,10 +1,10 @@
-# lodash-es v4.13.0
+# lodash-es v4.16.4
 
 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
+```shell
 $ lodash modularize exports=es -o ./
 ```
 
-See the [package source](https://github.com/lodash/lodash/tree/4.13.0-es) for more details.
+See the [package source](https://github.com/lodash/lodash/tree/4.16.4-es) for more details.

_Reflect.js

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

_Stack.js

@@ -13,7 +13,8 @@ import stackSet from './_stackSet.js';
  * @param {Array} [entries] The key-value pairs to cache.
  */
 function Stack(entries) {
-  this.__data__ = new ListCache(entries);
+  var data = this.__data__ = new ListCache(entries);
+  this.size = data.size;
 }
 
 // Add methods to `Stack`.

_addMapEntry.js

@@ -7,7 +7,7 @@
  * @returns {Object} Returns `map`.
  */
 function addMapEntry(map, pair) {
-  // Don't return `Map#set` because it doesn't return the map instance in IE 11.
+  // Don't return `map.set` because it's not chainable in IE 11.
   map.set(pair[0], pair[1]);
   return map;
 }

_addSetEntry.js

@@ -7,6 +7,7 @@
  * @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;
 }

_apply.js

@@ -9,8 +9,7 @@
  * @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]);

_arrayIncludes.js

@@ -5,7 +5,7 @@ import baseIndexOf from './_baseIndexOf.js';
  * 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`.
  */

_arrayIncludesWith.js

@@ -2,7 +2,7 @@
  * 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`.

_arrayLikeKeys.js

@@ -0,0 +1,49 @@
+import baseTimes from './_baseTimes.js';
+import isArguments from './isArguments.js';
+import isArray from './isArray.js';
+import isBuffer from './isBuffer.js';
+import isIndex from './_isIndex.js';
+import isTypedArray from './isTypedArray.js';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * 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) {
+  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 && (
+           // 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;
+}
+
+export default arrayLikeKeys;

_arraySample.js

@@ -0,0 +1,15 @@
+import baseRandom from './_baseRandom.js';
+
+/**
+ * A specialized version of `_.sample` for arrays.
+ *
+ * @private
+ * @param {Array} array The array to sample.
+ * @returns {*} Returns the random element.
+ */
+function arraySample(array) {
+  var length = array.length;
+  return length ? array[baseRandom(0, length - 1)] : undefined;
+}
+
+export default arraySample;

_arraySampleSize.js

@@ -0,0 +1,17 @@
+import baseClamp from './_baseClamp.js';
+import copyArray from './_copyArray.js';
+import shuffleSelf from './_shuffleSelf.js';
+
+/**
+ * A specialized version of `_.sampleSize` for arrays.
+ *
+ * @private
+ * @param {Array} array The array to sample.
+ * @param {number} n The number of elements to sample.
+ * @returns {Array} Returns the random elements.
+ */
+function arraySampleSize(array, n) {
+  return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));
+}
+
+export default arraySampleSize;

_arrayShuffle.js

@@ -0,0 +1,15 @@
+import copyArray from './_copyArray.js';
+import shuffleSelf from './_shuffleSelf.js';
+
+/**
+ * A specialized version of `_.shuffle` for arrays.
+ *
+ * @private
+ * @param {Array} array The array to shuffle.
+ * @returns {Array} Returns the new shuffled array.
+ */
+function arrayShuffle(array) {
+  return shuffleSelf(copyArray(array));
+}
+
+export default arrayShuffle;

_asciiSize.js

@@ -0,0 +1,12 @@
+import baseProperty from './_baseProperty.js';
+
+/**
+ * Gets the size of an ASCII `string`.
+ *
+ * @private
+ * @param {string} string The string inspect.
+ * @returns {number} Returns the string size.
+ */
+var asciiSize = baseProperty('length');
+
+export default asciiSize;

_asciiToArray.js

@@ -0,0 +1,12 @@
+/**
+ * Converts an ASCII `string` to an array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the converted array.
+ */
+function asciiToArray(string) {
+  return string.split('');
+}
+
+export default asciiToArray;

_asciiWords.js

@@ -0,0 +1,15 @@
+/** Used to match words composed of alphanumeric characters. */
+var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g;
+
+/**
+ * Splits an ASCII `string` into an array of its words.
+ *
+ * @private
+ * @param {string} The string to inspect.
+ * @returns {Array} Returns the words of `string`.
+ */
+function asciiWords(string) {
+  return string.match(reAsciiWord) || [];
+}
+
+export default asciiWords;

_assignMergeValue.js

@@ -1,3 +1,4 @@
+import baseAssignValue from './_baseAssignValue.js';
 import eq from './eq.js';
 
 /**
@@ -11,8 +12,8 @@ import eq from './eq.js';
  */
 function assignMergeValue(object, key, value) {
   if ((value !== undefined && !eq(object[key], value)) ||
-      (typeof key == 'number' && value === undefined && !(key in object))) {
-    object[key] = value;
+      (value === undefined && !(key in object))) {
+    baseAssignValue(object, key, value);
   }
 }
 

_assignValue.js

@@ -1,3 +1,4 @@
+import baseAssignValue from './_baseAssignValue.js';
 import eq from './eq.js';
 
 /** Used for built-in method references. */
@@ -8,7 +9,7 @@ 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)
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * for equality comparisons.
  *
  * @private
@@ -20,7 +21,7 @@ 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;
+    baseAssignValue(object, key, value);
   }
 }
 

_assocIndexOf.js

@@ -4,7 +4,7 @@ import eq from './eq.js';
  * 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`.
  */

_baseAssignValue.js

@@ -0,0 +1,25 @@
+import defineProperty from './_defineProperty.js';
+
+/**
+ * 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;
+  }
+}
+
+export default baseAssignValue;

_baseClamp.js

@@ -1,5 +1,5 @@
 /**
- * The base implementation of `_.clamp` which doesn't coerce arguments to numbers.
+ * The base implementation of `_.clamp` which doesn't coerce arguments.
  *
  * @private
  * @param {number} number The number to clamp.

_baseClone.js

@@ -12,7 +12,6 @@ import initCloneByTag from './_initCloneByTag.js';
 import initCloneObject from './_initCloneObject.js';
 import isArray from './isArray.js';
 import isBuffer from './isBuffer.js';
-import isHostObject from './_isHostObject.js';
 import isObject from './isObject.js';
 import keys from './keys.js';
 
@@ -100,9 +99,6 @@ function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
       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));
@@ -122,15 +118,13 @@ function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
   }
   stack.set(value, result);
 
-  if (!isArr) {
-    var props = isFull ? getAllKeys(value) : keys(value);
-  }
-  // Recursively populate clone (susceptible to call stack limits).
+  var props = isArr ? undefined : (isFull ? getAllKeys : 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));
   });
   return result;

_baseConforms.js

@@ -1,3 +1,4 @@
+import baseConformsTo from './_baseConformsTo.js';
 import keys from './keys.js';
 
 /**
@@ -8,25 +9,9 @@ import keys from './keys.js';
  * @returns {Function} Returns the new spec function.
  */
 function baseConforms(source) {
-  var props = keys(source),
-      length = props.length;
-
+  var props = keys(source);
   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;
+    return baseConformsTo(object, source, props);
   };
 }
 

_baseConformsTo.js

@@ -0,0 +1,27 @@
+/**
+ * The base implementation of `_.conformsTo` which accepts `props` to check.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property predicates to conform to.
+ * @returns {boolean} Returns `true` if `object` conforms, else `false`.
+ */
+function baseConformsTo(object, source, props) {
+  var length = props.length;
+  if (object == null) {
+    return !length;
+  }
+  object = Object(object);
+  while (length--) {
+    var key = props[length],
+        predicate = source[key],
+        value = object[key];
+
+    if ((value === undefined && !(key in object)) || !predicate(value)) {
+      return false;
+    }
+  }
+  return true;
+}
+
+export default baseConformsTo;

_baseCreate.js

@@ -8,11 +8,23 @@ var objectCreate = Object.create;
  * properties to the created object.
  *
  * @private
- * @param {Object} prototype The object to inherit from.
+ * @param {Object} proto The object to inherit from.
  * @returns {Object} Returns the new object.
  */
-function baseCreate(proto) {
-  return isObject(proto) ? objectCreate(proto) : {};
-}
+var baseCreate = (function() {
+  function object() {}
+  return function(proto) {
+    if (!isObject(proto)) {
+      return {};
+    }
+    if (objectCreate) {
+      return objectCreate(proto);
+    }
+    object.prototype = proto;
+    var result = new object;
+    object.prototype = undefined;
+    return result;
+  };
+}());
 
 export default baseCreate;

_baseDelay.js

@@ -1,15 +1,15 @@
-/** Used as the `TypeError` message for "Functions" methods. */
+/** Error message constants. */
 var FUNC_ERROR_TEXT = 'Expected a function';
 
 /**
- * The base implementation of `_.delay` and `_.defer` which accepts an array
- * of `func` arguments.
+ * The base implementation of `_.delay` and `_.defer` which accepts `args`
+ * to provide to `func`.
  *
  * @private
  * @param {Function} func The function to delay.
  * @param {number} wait The number of milliseconds to delay invocation.
- * @param {Object} args The arguments to provide to `func`.
- * @returns {number} Returns the timer id.
+ * @param {Array} args The arguments to provide to `func`.
+ * @returns {number|Object} Returns the timer id or timeout object.
  */
 function baseDelay(func, wait, args) {
   if (typeof func != 'function') {

_baseFindIndex.js

@@ -3,7 +3,7 @@
  * 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.

_baseFindKey.js

@@ -4,7 +4,7 @@
  * using `eachFunc`.
  *
  * @private
- * @param {Array|Object} collection The collection to search.
+ * @param {Array|Object} collection The collection to inspect.
  * @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`.

_baseGetTag.js

@@ -0,0 +1,22 @@
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/**
+ * The base implementation of `getTag`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+  return objectToString.call(value);
+}
+
+export default baseGetTag;

_baseGt.js

@@ -1,5 +1,5 @@
 /**
- * The base implementation of `_.gt` which doesn't coerce arguments to numbers.
+ * The base implementation of `_.gt` which doesn't coerce arguments.
  *
  * @private
  * @param {*} value The value to compare.

_baseHas.js

@@ -1,5 +1,3 @@
-import getPrototype from './_getPrototype.js';
-
 /** Used for built-in method references. */
 var objectProto = Object.prototype;
 
@@ -15,12 +13,7 @@ var hasOwnProperty = objectProto.hasOwnProperty;
  * @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));
+  return object != null && hasOwnProperty.call(object, key);
 }
 
 export default baseHas;

_baseInRange.js

@@ -3,7 +3,7 @@ var nativeMax = Math.max,
     nativeMin = Math.min;
 
 /**
- * The base implementation of `_.inRange` which doesn't coerce arguments to numbers.
+ * The base implementation of `_.inRange` which doesn't coerce arguments.
  *
  * @private
  * @param {number} number The number to check.

_baseIndexOf.js

@@ -1,27 +1,20 @@
-import indexOfNaN from './_indexOfNaN.js';
+import baseFindIndex from './_baseFindIndex.js';
+import baseIsNaN from './_baseIsNaN.js';
+import strictIndexOf from './_strictIndexOf.js';
 
 /**
  * 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`.
  */
 function baseIndexOf(array, value, fromIndex) {
-  if (value !== value) {
-    return indexOfNaN(array, fromIndex);
-  }
-  var index = fromIndex - 1,
-      length = array.length;
-
-  while (++index < length) {
-    if (array[index] === value) {
-      return index;
-    }
-  }
-  return -1;
+  return value === value
+    ? strictIndexOf(array, value, fromIndex)
+    : baseFindIndex(array, baseIsNaN, fromIndex);
 }
 
 export default baseIndexOf;

_baseIndexOfWith.js

@@ -2,7 +2,7 @@
  * This function is like `baseIndexOf` except that it accepts a comparator.
  *
  * @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.
  * @param {Function} comparator The comparator invoked per element.

_baseIsArguments.js

@@ -0,0 +1,27 @@
+import isObjectLike from './isObjectLike.js';
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/**
+ * 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) && objectToString.call(value) == argsTag;
+}
+
+export default baseIsArguments;

_baseIsArrayBuffer.js

@@ -0,0 +1,26 @@
+import isObjectLike from './isObjectLike.js';
+
+var arrayBufferTag = '[object ArrayBuffer]';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/**
+ * The base implementation of `_.isArrayBuffer` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
+ */
+function baseIsArrayBuffer(value) {
+  return isObjectLike(value) && objectToString.call(value) == arrayBufferTag;
+}
+
+export default baseIsArrayBuffer;

_baseIsDate.js

@@ -0,0 +1,27 @@
+import isObjectLike from './isObjectLike.js';
+
+/** `Object#toString` result references. */
+var dateTag = '[object Date]';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/**
+ * The base implementation of `_.isDate` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
+ */
+function baseIsDate(value) {
+  return isObjectLike(value) && objectToString.call(value) == dateTag;
+}
+
+export default baseIsDate;

_baseIsEqualDeep.js

@@ -4,7 +4,7 @@ import equalByTag from './_equalByTag.js';
 import equalObjects from './_equalObjects.js';
 import getTag from './_getTag.js';
 import isArray from './isArray.js';
-import isHostObject from './_isHostObject.js';
+import isBuffer from './isBuffer.js';
 import isTypedArray from './isTypedArray.js';
 
 /** Used to compose bitmasks for comparison styles. */
@@ -50,10 +50,17 @@ function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
     othTag = getTag(other);
     othTag = othTag == argsTag ? objectTag : othTag;
   }
-  var objIsObj = objTag == objectTag && !isHostObject(object),
-      othIsObj = othTag == objectTag && !isHostObject(other),
+  var objIsObj = objTag == objectTag,
+      othIsObj = othTag == objectTag,
       isSameTag = objTag == othTag;
 
+  if (isSameTag && isBuffer(object)) {
+    if (!isBuffer(other)) {
+      return false;
+    }
+    objIsArr = true;
+    objIsObj = false;
+  }
   if (isSameTag && !objIsObj) {
     stack || (stack = new Stack);
     return (objIsArr || isTypedArray(object))

_baseIsMap.js

@@ -0,0 +1,18 @@
+import getTag from './_getTag.js';
+import isObjectLike from './isObjectLike.js';
+
+/** `Object#toString` result references. */
+var mapTag = '[object Map]';
+
+/**
+ * The base implementation of `_.isMap` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a map, else `false`.
+ */
+function baseIsMap(value) {
+  return isObjectLike(value) && getTag(value) == mapTag;
+}
+
+export default baseIsMap;

_baseIsNaN.js

@@ -0,0 +1,12 @@
+/**
+ * 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;
+}
+
+export default baseIsNaN;

_baseIsNative.js

@@ -1,12 +1,11 @@
 import isFunction from './isFunction.js';
-import isHostObject from './_isHostObject.js';
 import isMasked from './_isMasked.js';
 import isObject from './isObject.js';
 import toSource from './_toSource.js';
 
 /**
  * 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;
 
@@ -14,10 +13,11 @@ var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 var reIsHostCtor = /^\[object .+?Constructor\]$/;
 
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var funcProto = Function.prototype,
+    objectProto = Object.prototype;
 
 /** 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;
@@ -40,7 +40,7 @@ function baseIsNative(value) {
   if (!isObject(value) || isMasked(value)) {
     return false;
   }
-  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
   return pattern.test(toSource(value));
 }
 

_baseIsRegExp.js

@@ -0,0 +1,27 @@
+import isObject from './isObject.js';
+
+/** `Object#toString` result references. */
+var regexpTag = '[object RegExp]';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/**
+ * The base implementation of `_.isRegExp` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
+ */
+function baseIsRegExp(value) {
+  return isObject(value) && objectToString.call(value) == regexpTag;
+}
+
+export default baseIsRegExp;

_baseIsSet.js

@@ -0,0 +1,18 @@
+import getTag from './_getTag.js';
+import isObjectLike from './isObjectLike.js';
+
+/** `Object#toString` result references. */
+var setTag = '[object Set]';
+
+/**
+ * The base implementation of `_.isSet` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a set, else `false`.
+ */
+function baseIsSet(value) {
+  return isObjectLike(value) && getTag(value) == setTag;
+}
+
+export default baseIsSet;

_baseIsTypedArray.js

@@ -0,0 +1,69 @@
+import isLength from './isLength.js';
+import isObjectLike from './isObjectLike.js';
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    boolTag = '[object Boolean]',
+    dateTag = '[object Date]',
+    errorTag = '[object Error]',
+    funcTag = '[object Function]',
+    mapTag = '[object Map]',
+    numberTag = '[object Number]',
+    objectTag = '[object Object]',
+    regexpTag = '[object RegExp]',
+    setTag = '[object Set]',
+    stringTag = '[object String]',
+    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 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 for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/**
+ * 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)];
+}
+
+export default baseIsTypedArray;

_baseKeys.js

@@ -1,16 +1,30 @@
-/* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeKeys = Object.keys;
+import isPrototype from './_isPrototype.js';
+import nativeKeys from './_nativeKeys.js';
+
+/** 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 `_.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.
  */
 function baseKeys(object) {
-  return nativeKeys(Object(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;
 }
 
 export default baseKeys;

_baseKeysIn.js

@@ -1,36 +1,33 @@
-import Reflect from './_Reflect.js';
-import iteratorToArray from './_iteratorToArray.js';
+import isObject from './isObject.js';
+import isPrototype from './_isPrototype.js';
+import nativeKeysIn from './_nativeKeysIn.js';
 
 /** Used for built-in method references. */
 var objectProto = Object.prototype;
 
-/** Built-in value references. */
-var enumerate = Reflect ? Reflect.enumerate : undefined,
-    propertyIsEnumerable = objectProto.propertyIsEnumerable;
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
- * 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));
-  };
-}
-
 export default baseKeysIn;

_baseLt.js

@@ -1,5 +1,5 @@
 /**
- * The base implementation of `_.lt` which doesn't coerce arguments to numbers.
+ * The base implementation of `_.lt` which doesn't coerce arguments.
  *
  * @private
  * @param {*} value The value to compare.

_baseMerge.js

@@ -1,10 +1,8 @@
 import Stack from './_Stack.js';
-import arrayEach from './_arrayEach.js';
 import assignMergeValue from './_assignMergeValue.js';
+import baseFor from './_baseFor.js';
 import baseMergeDeep from './_baseMergeDeep.js';
-import isArray from './isArray.js';
 import isObject from './isObject.js';
-import isTypedArray from './isTypedArray.js';
 import keysIn from './keysIn.js';
 
 /**
@@ -22,14 +20,7 @@ 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];
-    }
+  baseFor(source, function(srcValue, key) {
     if (isObject(srcValue)) {
       stack || (stack = new Stack);
       baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
@@ -44,7 +35,7 @@ function baseMerge(object, source, srcIndex, customizer, stack) {
       }
       assignMergeValue(object, key, newValue);
     }
-  });
+  }, keysIn);
 }
 
 export default baseMerge;

_baseMergeDeep.js

@@ -1,9 +1,12 @@
 import assignMergeValue from './_assignMergeValue.js';
-import baseClone from './_baseClone.js';
+import cloneBuffer from './_cloneBuffer.js';
+import cloneTypedArray from './_cloneTypedArray.js';
 import copyArray from './_copyArray.js';
+import initCloneObject from './_initCloneObject.js';
 import isArguments from './isArguments.js';
 import isArray from './isArray.js';
 import isArrayLikeObject from './isArrayLikeObject.js';
+import isBuffer from './isBuffer.js';
 import isFunction from './isFunction.js';
 import isObject from './isObject.js';
 import isPlainObject from './isPlainObject.js';
@@ -41,42 +44,49 @@ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, sta
   var isCommon = newValue === undefined;
 
   if (isCommon) {
+    var isArr = isArray(srcValue),
+        isBuff = !isArr && isBuffer(srcValue),
+        isTyped = !isArr && !isBuff && isTypedArray(srcValue);
+
     newValue = srcValue;
-    if (isArray(srcValue) || isTypedArray(srcValue)) {
+    if (isArr || isBuff || isTyped) {
       if (isArray(objValue)) {
         newValue = objValue;
       }
       else if (isArrayLikeObject(objValue)) {
         newValue = copyArray(objValue);
       }
-      else {
+      else if (isBuff) {
         isCommon = false;
-        newValue = baseClone(srcValue, true);
+        newValue = cloneBuffer(srcValue, true);
+      }
+      else if (isTyped) {
+        isCommon = false;
+        newValue = cloneTypedArray(srcValue, true);
+      }
+      else {
+        newValue = [];
       }
     }
     else if (isPlainObject(srcValue) || isArguments(srcValue)) {
+      newValue = objValue;
       if (isArguments(objValue)) {
         newValue = toPlainObject(objValue);
       }
       else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
-        isCommon = false;
-        newValue = baseClone(srcValue, true);
-      }
-      else {
-        newValue = objValue;
+        newValue = initCloneObject(srcValue);
       }
     }
     else {
       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);
 }
 

_baseNth.js

@@ -1,7 +1,7 @@
 import isIndex from './_isIndex.js';
 
 /**
- * The base implementation of `_.nth` which doesn't coerce `n` to an integer.
+ * The base implementation of `_.nth` which doesn't coerce arguments.
  *
  * @private
  * @param {Array} array The array to query.

_basePick.js

@@ -1,4 +1,4 @@
-import arrayReduce from './_arrayReduce.js';
+import basePickBy from './_basePickBy.js';
 
 /**
  * The base implementation of `_.pick` without support for individual
@@ -11,12 +11,9 @@ import arrayReduce from './_arrayReduce.js';
  */
 function basePick(object, props) {
   object = Object(object);
-  return arrayReduce(props, function(result, key) {
-    if (key in object) {
-      result[key] = object[key];
-    }
-    return result;
-  }, {});
+  return basePickBy(object, props, function(value, key) {
+    return key in object;
+  });
 }
 
 export default basePick;

_basePickBy.js

@@ -1,16 +1,16 @@
-import getAllKeysIn from './_getAllKeysIn.js';
+import baseAssignValue from './_baseAssignValue.js';
 
 /**
  * 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 = {};
 
@@ -19,7 +19,7 @@ function basePickBy(object, predicate) {
         value = object[key];
 
     if (predicate(value, key)) {
-      result[key] = value;
+      baseAssignValue(result, key, value);
     }
   }
   return result;

_basePropertyOf.js

@@ -0,0 +1,14 @@
+/**
+ * The base implementation of `_.propertyOf` without support for deep paths.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Function} Returns the new accessor function.
+ */
+function basePropertyOf(object) {
+  return function(key) {
+    return object == null ? undefined : object[key];
+  };
+}
+
+export default basePropertyOf;

_baseRange.js

@@ -4,7 +4,7 @@ var nativeCeil = Math.ceil,
 
 /**
  * The base implementation of `_.range` and `_.rangeRight` which doesn't
- * coerce arguments to numbers.
+ * coerce arguments.
  *
  * @private
  * @param {number} start The start of the range.

_baseRest.js

@@ -0,0 +1,17 @@
+import identity from './identity.js';
+import overRest from './_overRest.js';
+import setToString from './_setToString.js';
+
+/**
+ * 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) {
+  return setToString(overRest(func, start, identity), func + '');
+}
+
+export default baseRest;

_baseSample.js

@@ -0,0 +1,15 @@
+import arraySample from './_arraySample.js';
+import values from './values.js';
+
+/**
+ * The base implementation of `_.sample`.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to sample.
+ * @returns {*} Returns the random element.
+ */
+function baseSample(collection) {
+  return arraySample(values(collection));
+}
+
+export default baseSample;

_baseSampleSize.js

@@ -0,0 +1,18 @@
+import baseClamp from './_baseClamp.js';
+import shuffleSelf from './_shuffleSelf.js';
+import values from './values.js';
+
+/**
+ * The base implementation of `_.sampleSize` without param guards.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to sample.
+ * @param {number} n The number of elements to sample.
+ * @returns {Array} Returns the random elements.
+ */
+function baseSampleSize(collection, n) {
+  var array = values(collection);
+  return shuffleSelf(array, baseClamp(n, 0, array.length));
+}
+
+export default baseSampleSize;

_baseSet.js

@@ -9,13 +9,16 @@ import toKey from './_toKey.js';
  * The base implementation of `_.set`.
  *
  * @private
- * @param {Object} object The object to query.
+ * @param {Object} object The object to modify.
  * @param {Array|string} path The path of the property to set.
  * @param {*} value The value to set.
  * @param {Function} [customizer] The function to customize path creation.
  * @returns {Object} Returns `object`.
  */
 function baseSet(object, path, value, customizer) {
+  if (!isObject(object)) {
+    return object;
+  }
   path = isKey(path, object) ? [path] : castPath(path);
 
   var index = -1,
@@ -24,20 +27,19 @@ function baseSet(object, path, value, customizer) {
       nested = object;
 
   while (nested != null && ++index < length) {
-    var key = toKey(path[index]);
-    if (isObject(nested)) {
-      var newValue = value;
-      if (index != lastIndex) {
-        var objValue = nested[key];
-        newValue = customizer ? customizer(objValue, key, nested) : undefined;
-        if (newValue === undefined) {
-          newValue = objValue == null
-            ? (isIndex(path[index + 1]) ? [] : {})
-            : objValue;
-        }
+    var key = toKey(path[index]),
+        newValue = value;
+
+    if (index != lastIndex) {
+      var objValue = nested[key];
+      newValue = customizer ? customizer(objValue, key, nested) : undefined;
+      if (newValue === undefined) {
+        newValue = isObject(objValue)
+          ? objValue
+          : (isIndex(path[index + 1]) ? [] : {});
       }
-      assignValue(nested, key, newValue);
     }
+    assignValue(nested, key, newValue);
     nested = nested[key];
   }
   return object;

_baseSetData.js

@@ -2,7 +2,7 @@ import identity from './identity.js';
 import metaMap from './_metaMap.js';
 
 /**
- * The base implementation of `setData` without support for hot loop detection.
+ * The base implementation of `setData` without support for hot loop shorting.
  *
  * @private
  * @param {Function} func The function to associate metadata with.

_baseSetToString.js

@@ -0,0 +1,22 @@
+import constant from './constant.js';
+import defineProperty from './_defineProperty.js';
+import identity from './identity.js';
+
+/**
+ * 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
+  });
+};
+
+export default baseSetToString;

_baseShuffle.js

@@ -0,0 +1,15 @@
+import shuffleSelf from './_shuffleSelf.js';
+import values from './values.js';
+
+/**
+ * The base implementation of `_.shuffle`.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to shuffle.
+ * @returns {Array} Returns the new shuffled array.
+ */
+function baseShuffle(collection) {
+  return shuffleSelf(values(collection));
+}
+
+export default baseShuffle;

_baseToString.js

@@ -1,4 +1,6 @@
 import Symbol from './_Symbol.js';
+import arrayMap from './_arrayMap.js';
+import isArray from './isArray.js';
 import isSymbol from './isSymbol.js';
 
 /** Used as references for various `Number` constants. */
@@ -21,6 +23,10 @@ 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) : '';
   }

_baseUnary.js

@@ -1,5 +1,5 @@
 /**
- * The base implementation of `_.unary` without support for storing wrapper metadata.
+ * The base implementation of `_.unary` without support for storing metadata.
  *
  * @private
  * @param {Function} func The function to cap arguments for.

_baseUnset.js

@@ -1,10 +1,15 @@
-import baseHas from './_baseHas.js';
 import castPath from './_castPath.js';
 import isKey from './_isKey.js';
 import last from './last.js';
 import parent from './_parent.js';
 import toKey from './_toKey.js';
 
+/** 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 `_.unset`.
  *
@@ -18,7 +23,7 @@ function baseUnset(object, path) {
   object = parent(object, path);
 
   var key = toKey(last(path));
-  return !(object != null && baseHas(object, key)) || delete object[key];
+  return !(object != null && hasOwnProperty.call(object, key)) || delete object[key];
 }
 
 export default baseUnset;

_baseUpdate.js

@@ -5,7 +5,7 @@ import baseSet from './_baseSet.js';
  * The base implementation of `_.update`.
  *
  * @private
- * @param {Object} object The object to query.
+ * @param {Object} object The object to modify.
  * @param {Array|string} path The path of the property to update.
  * @param {Function} updater The function to produce the updated value.
  * @param {Function} [customizer] The function to customize path creation.

_cacheHas.js

@@ -1,5 +1,5 @@
 /**
- * Checks if a cache value for `key` exists.
+ * Checks if a `cache` value for `key` exists.
  *
  * @private
  * @param {Object} cache The cache to query.

_castRest.js

@@ -0,0 +1,14 @@
+import baseRest from './_baseRest.js';
+
+/**
+ * A `baseRest` alias which can be replaced with `identity` by module
+ * replacement plugins.
+ *
+ * @private
+ * @type {Function}
+ * @param {Function} func The function to apply a rest parameter to.
+ * @returns {Function} Returns the new function.
+ */
+var castRest = baseRest;
+
+export default castRest;

_checkGlobal.js

@@ -1,12 +0,0 @@
-/**
- * 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;
-}
-
-export default checkGlobal;

_cloneBuffer.js

@@ -1,3 +1,18 @@
+import root from './_root.js';
+
+/** 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;
+
+/** Built-in value references. */
+var Buffer = moduleExports ? root.Buffer : undefined,
+    allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined;
+
 /**
  * Creates a clone of  `buffer`.
  *
@@ -10,7 +25,9 @@ function cloneBuffer(buffer, isDeep) {
   if (isDeep) {
     return buffer.slice();
   }
-  var result = new buffer.constructor(buffer.length);
+  var length = buffer.length,
+      result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);
+
   buffer.copy(result);
   return result;
 }

_copyObject.js

@@ -1,4 +1,5 @@
 import assignValue from './_assignValue.js';
+import baseAssignValue from './_baseAssignValue.js';
 
 /**
  * Copies properties of `source` to `object`.
@@ -11,6 +12,7 @@ import assignValue from './_assignValue.js';
  * @returns {Object} Returns `object`.
  */
 function copyObject(source, props, object, customizer) {
+  var isNew = !object;
   object || (object = {});
 
   var index = -1,
@@ -21,9 +23,16 @@ function copyObject(source, props, object, customizer) {
 
     var newValue = customizer
       ? customizer(object[key], source[key], key, object, source)
-      : source[key];
+      : undefined;
 
-    assignValue(object, key, newValue);
+    if (newValue === undefined) {
+      newValue = source[key];
+    }
+    if (isNew) {
+      baseAssignValue(object, key, newValue);
+    } else {
+      assignValue(object, key, newValue);
+    }
   }
   return object;
 }

_countHolders.js

@@ -12,7 +12,7 @@ function countHolders(array, placeholder) {
 
   while (length--) {
     if (array[length] === placeholder) {
-      result++;
+      ++result;
     }
   }
   return result;

_createAggregator.js

@@ -16,7 +16,7 @@ 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);
   };
 }
 

_createAssigner.js

@@ -1,5 +1,5 @@
+import baseRest from './_baseRest.js';
 import isIterateeCall from './_isIterateeCall.js';
-import rest from './rest.js';
 
 /**
  * Creates a function like `_.assign`.
@@ -9,7 +9,7 @@ import rest from './rest.js';
  * @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,

_createBind.js

@@ -1,7 +1,7 @@
-import createCtorWrapper from './_createCtorWrapper.js';
+import createCtor from './_createCtor.js';
 import root from './_root.js';
 
-/** Used to compose bitmasks for wrapper metadata. */
+/** Used to compose bitmasks for function metadata. */
 var BIND_FLAG = 1;
 
 /**
@@ -10,14 +10,13 @@ var BIND_FLAG = 1;
  *
  * @private
  * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper`
- *  for more details.
+ * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  * @param {*} [thisArg] The `this` binding of `func`.
  * @returns {Function} Returns the new wrapped function.
  */
-function createBaseWrapper(func, bitmask, thisArg) {
+function createBind(func, bitmask, thisArg) {
   var isBind = bitmask & BIND_FLAG,
-      Ctor = createCtorWrapper(func);
+      Ctor = createCtor(func);
 
   function wrapper() {
     var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
@@ -26,4 +25,4 @@ function createBaseWrapper(func, bitmask, thisArg) {
   return wrapper;
 }
 
-export default createBaseWrapper;
+export default createBind;

_createCaseFirst.js

@@ -1,5 +1,5 @@
 import castSlice from './_castSlice.js';
-import reHasComplexSymbol from './_reHasComplexSymbol.js';
+import hasUnicode from './_hasUnicode.js';
 import stringToArray from './_stringToArray.js';
 import toString from './toString.js';
 
@@ -14,7 +14,7 @@ function createCaseFirst(methodName) {
   return function(string) {
     string = toString(string);
 
-    var strSymbols = reHasComplexSymbol.test(string)
+    var strSymbols = hasUnicode(string)
       ? stringToArray(string)
       : undefined;
 

_createCtor.js

@@ -9,10 +9,10 @@ import isObject from './isObject.js';
  * @param {Function} Ctor The constructor to wrap.
  * @returns {Function} Returns the new wrapped function.
  */
-function createCtorWrapper(Ctor) {
+function createCtor(Ctor) {
   return function() {
     // Use a `switch` statement to work with class constructors. See
-    // http://ecma-international.org/ecma-262/6.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
+    // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
     // for more details.
     var args = arguments;
     switch (args.length) {
@@ -34,4 +34,4 @@ function createCtorWrapper(Ctor) {
   };
 }
 
-export default createCtorWrapper;
+export default createCtor;

_createCurry.js

@@ -1,7 +1,7 @@
 import apply from './_apply.js';
-import createCtorWrapper from './_createCtorWrapper.js';
-import createHybridWrapper from './_createHybridWrapper.js';
-import createRecurryWrapper from './_createRecurryWrapper.js';
+import createCtor from './_createCtor.js';
+import createHybrid from './_createHybrid.js';
+import createRecurry from './_createRecurry.js';
 import getHolder from './_getHolder.js';
 import replaceHolders from './_replaceHolders.js';
 import root from './_root.js';
@@ -11,13 +11,12 @@ import root from './_root.js';
  *
  * @private
  * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper`
- *  for more details.
+ * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  * @param {number} arity The arity of `func`.
  * @returns {Function} Returns the new wrapped function.
  */
-function createCurryWrapper(func, bitmask, arity) {
-  var Ctor = createCtorWrapper(func);
+function createCurry(func, bitmask, arity) {
+  var Ctor = createCtor(func);
 
   function wrapper() {
     var length = arguments.length,
@@ -34,8 +33,8 @@ function createCurryWrapper(func, bitmask, arity) {
 
     length -= holders.length;
     if (length < arity) {
-      return createRecurryWrapper(
-        func, bitmask, createHybridWrapper, wrapper.placeholder, undefined,
+      return createRecurry(
+        func, bitmask, createHybrid, wrapper.placeholder, undefined,
         args, holders, undefined, undefined, arity - length);
     }
     var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
@@ -44,4 +43,4 @@ function createCurryWrapper(func, bitmask, arity) {
   return wrapper;
 }
 
-export default createCurryWrapper;
+export default createCurry;

_createFind.js

@@ -0,0 +1,25 @@
+import baseIteratee from './_baseIteratee.js';
+import isArrayLike from './isArrayLike.js';
+import keys from './keys.js';
+
+/**
+ * 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;
+  };
+}
+
+export default createFind;

_createFlow.js

@@ -1,18 +1,17 @@
 import LodashWrapper from './_LodashWrapper.js';
-import baseFlatten from './_baseFlatten.js';
+import flatRest from './_flatRest.js';
 import getData from './_getData.js';
 import getFuncName from './_getFuncName.js';
 import isArray from './isArray.js';
 import isLaziable from './_isLaziable.js';
-import rest from './rest.js';
 
 /** Used as the size to enable large array optimizations. */
 var LARGE_ARRAY_SIZE = 200;
 
-/** Used as the `TypeError` message for "Functions" methods. */
+/** Error message constants. */
 var FUNC_ERROR_TEXT = 'Expected a function';
 
-/** Used to compose bitmasks for wrapper metadata. */
+/** Used to compose bitmasks for function metadata. */
 var CURRY_FLAG = 8,
     PARTIAL_FLAG = 32,
     ARY_FLAG = 128,
@@ -26,9 +25,7 @@ var CURRY_FLAG = 8,
  * @returns {Function} Returns the new flow function.
  */
 function createFlow(fromRight) {
-  return rest(function(funcs) {
-    funcs = baseFlatten(funcs, 1);
-
+  return flatRest(function(funcs) {
     var length = funcs.length,
         index = length,
         prereq = LodashWrapper.prototype.thru;

_createHybrid.js

@@ -1,14 +1,14 @@
 import composeArgs from './_composeArgs.js';
 import composeArgsRight from './_composeArgsRight.js';
 import countHolders from './_countHolders.js';
-import createCtorWrapper from './_createCtorWrapper.js';
-import createRecurryWrapper from './_createRecurryWrapper.js';
+import createCtor from './_createCtor.js';
+import createRecurry from './_createRecurry.js';
 import getHolder from './_getHolder.js';
 import reorder from './_reorder.js';
 import replaceHolders from './_replaceHolders.js';
 import root from './_root.js';
 
-/** Used to compose bitmasks for wrapper metadata. */
+/** Used to compose bitmasks for function metadata. */
 var BIND_FLAG = 1,
     BIND_KEY_FLAG = 2,
     CURRY_FLAG = 8,
@@ -22,8 +22,7 @@ var BIND_FLAG = 1,
  *
  * @private
  * @param {Function|string} func The function or method name to wrap.
- * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper`
- *  for more details.
+ * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  * @param {*} [thisArg] The `this` binding of `func`.
  * @param {Array} [partials] The arguments to prepend to those provided to
  *  the new function.
@@ -36,13 +35,13 @@ var BIND_FLAG = 1,
  * @param {number} [arity] The arity of `func`.
  * @returns {Function} Returns the new wrapped function.
  */
-function createHybridWrapper(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
+function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
   var isAry = bitmask & ARY_FLAG,
       isBind = bitmask & BIND_FLAG,
       isBindKey = bitmask & BIND_KEY_FLAG,
       isCurried = bitmask & (CURRY_FLAG | CURRY_RIGHT_FLAG),
       isFlip = bitmask & FLIP_FLAG,
-      Ctor = isBindKey ? undefined : createCtorWrapper(func);
+      Ctor = isBindKey ? undefined : createCtor(func);
 
   function wrapper() {
     var length = arguments.length,
@@ -65,8 +64,8 @@ function createHybridWrapper(func, bitmask, thisArg, partials, holders, partials
     length -= holdersCount;
     if (isCurried && length < arity) {
       var newHolders = replaceHolders(args, placeholder);
-      return createRecurryWrapper(
-        func, bitmask, createHybridWrapper, wrapper.placeholder, thisArg,
+      return createRecurry(
+        func, bitmask, createHybrid, wrapper.placeholder, thisArg,
         args, newHolders, argPos, ary, arity - length
       );
     }
@@ -83,11 +82,11 @@ function createHybridWrapper(func, bitmask, thisArg, partials, holders, partials
       args.length = ary;
     }
     if (this && this !== root && this instanceof wrapper) {
-      fn = Ctor || createCtorWrapper(fn);
+      fn = Ctor || createCtor(fn);
     }
     return fn.apply(thisBinding, args);
   }
   return wrapper;
 }
 
-export default createHybridWrapper;
+export default createHybrid;

_createMathOperation.js

@@ -6,13 +6,14 @@ import baseToString from './_baseToString.js';
  *
  * @private
  * @param {Function} operator The function to perform the operation.
+ * @param {number} [defaultValue] The value used for `undefined` arguments.
  * @returns {Function} Returns the new mathematical operation function.
  */
-function createMathOperation(operator) {
+function createMathOperation(operator, defaultValue) {
   return function(value, other) {
     var result;
     if (value === undefined && other === undefined) {
-      return 0;
+      return defaultValue;
     }
     if (value !== undefined) {
       result = value;

_createOver.js

@@ -1,11 +1,9 @@
 import apply from './_apply.js';
 import arrayMap from './_arrayMap.js';
-import baseFlatten from './_baseFlatten.js';
 import baseIteratee from './_baseIteratee.js';
+import baseRest from './_baseRest.js';
 import baseUnary from './_baseUnary.js';
-import isArray from './isArray.js';
-import isFlattenableIteratee from './_isFlattenableIteratee.js';
-import rest from './rest.js';
+import flatRest from './_flatRest.js';
 
 /**
  * Creates a function like `_.over`.
@@ -15,12 +13,9 @@ import rest from './rest.js';
  * @returns {Function} Returns the new over function.
  */
 function createOver(arrayFunc) {
-  return rest(function(iteratees) {
-    iteratees = (iteratees.length == 1 && isArray(iteratees[0]))
-      ? arrayMap(iteratees[0], baseUnary(baseIteratee))
-      : arrayMap(baseFlatten(iteratees, 1, isFlattenableIteratee), baseUnary(baseIteratee));
-
-    return rest(function(args) {
+  return flatRest(function(iteratees) {
+    iteratees = arrayMap(iteratees, baseUnary(baseIteratee));
+    return baseRest(function(args) {
       var thisArg = this;
       return arrayFunc(iteratees, function(iteratee) {
         return apply(iteratee, thisArg, args);

_createPadding.js

@@ -1,7 +1,7 @@
 import baseRepeat from './_baseRepeat.js';
 import baseToString from './_baseToString.js';
 import castSlice from './_castSlice.js';
-import reHasComplexSymbol from './_reHasComplexSymbol.js';
+import hasUnicode from './_hasUnicode.js';
 import stringSize from './_stringSize.js';
 import stringToArray from './_stringToArray.js';
 
@@ -25,7 +25,7 @@ function createPadding(length, chars) {
     return charsLength ? baseRepeat(chars, length) : chars;
   }
   var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
-  return reHasComplexSymbol.test(chars)
+  return hasUnicode(chars)
     ? castSlice(stringToArray(result), 0, length).join('')
     : result.slice(0, length);
 }

_createPartial.js

@@ -1,8 +1,8 @@
 import apply from './_apply.js';
-import createCtorWrapper from './_createCtorWrapper.js';
+import createCtor from './_createCtor.js';
 import root from './_root.js';
 
-/** Used to compose bitmasks for wrapper metadata. */
+/** Used to compose bitmasks for function metadata. */
 var BIND_FLAG = 1;
 
 /**
@@ -11,16 +11,15 @@ var BIND_FLAG = 1;
  *
  * @private
  * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper`
- *  for more details.
+ * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  * @param {*} thisArg The `this` binding of `func`.
  * @param {Array} partials The arguments to prepend to those provided to
  *  the new function.
  * @returns {Function} Returns the new wrapped function.
  */
-function createPartialWrapper(func, bitmask, thisArg, partials) {
+function createPartial(func, bitmask, thisArg, partials) {
   var isBind = bitmask & BIND_FLAG,
-      Ctor = createCtorWrapper(func);
+      Ctor = createCtor(func);
 
   function wrapper() {
     var argsIndex = -1,
@@ -41,4 +40,4 @@ function createPartialWrapper(func, bitmask, thisArg, partials) {
   return wrapper;
 }
 
-export default createPartialWrapper;
+export default createPartial;

_createRange.js

@@ -1,6 +1,6 @@
 import baseRange from './_baseRange.js';
 import isIterateeCall from './_isIterateeCall.js';
-import toNumber from './toNumber.js';
+import toFinite from './toFinite.js';
 
 /**
  * Creates a `_.range` or `_.rangeRight` function.
@@ -15,15 +15,14 @@ function createRange(fromRight) {
       end = step = undefined;
     }
     // Ensure the sign of `-0` is preserved.
-    start = toNumber(start);
-    start = start === start ? start : 0;
+    start = toFinite(start);
     if (end === undefined) {
       end = start;
       start = 0;
     } else {
-      end = toNumber(end) || 0;
+      end = toFinite(end);
     }
-    step = step === undefined ? (start < end ? 1 : -1) : (toNumber(step) || 0);
+    step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
     return baseRange(start, end, step, fromRight);
   };
 }

_createRecurry.js

@@ -1,7 +1,8 @@
 import isLaziable from './_isLaziable.js';
 import setData from './_setData.js';
+import setWrapToString from './_setWrapToString.js';
 
-/** Used to compose bitmasks for wrapper metadata. */
+/** Used to compose bitmasks for function metadata. */
 var BIND_FLAG = 1,
     BIND_KEY_FLAG = 2,
     CURRY_BOUND_FLAG = 4,
@@ -14,8 +15,7 @@ var BIND_FLAG = 1,
  *
  * @private
  * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper`
- *  for more details.
+ * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  * @param {Function} wrapFunc The function to create the `func` wrapper.
  * @param {*} placeholder The placeholder value.
  * @param {*} [thisArg] The `this` binding of `func`.
@@ -27,7 +27,7 @@ var BIND_FLAG = 1,
  * @param {number} [arity] The arity of `func`.
  * @returns {Function} Returns the new wrapped function.
  */
-function createRecurryWrapper(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
+function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
   var isCurry = bitmask & CURRY_FLAG,
       newHolders = isCurry ? holders : undefined,
       newHoldersRight = isCurry ? undefined : holders,
@@ -50,7 +50,7 @@ function createRecurryWrapper(func, bitmask, wrapFunc, placeholder, thisArg, par
     setData(result, newData);
   }
   result.placeholder = placeholder;
-  return result;
+  return setWrapToString(result, func, bitmask);
 }
 
-export default createRecurryWrapper;
+export default createRecurry;

_createSet.js

@@ -6,7 +6,7 @@ import setToArray from './_setToArray.js';
 var INFINITY = 1 / 0;
 
 /**
- * Creates a set of `values`.
+ * Creates a set object of `values`.
  *
  * @private
  * @param {Array} values The values to add to the set.

_createWrap.js

@@ -1,17 +1,18 @@
 import baseSetData from './_baseSetData.js';
-import createBaseWrapper from './_createBaseWrapper.js';
-import createCurryWrapper from './_createCurryWrapper.js';
-import createHybridWrapper from './_createHybridWrapper.js';
-import createPartialWrapper from './_createPartialWrapper.js';
+import createBind from './_createBind.js';
+import createCurry from './_createCurry.js';
+import createHybrid from './_createHybrid.js';
+import createPartial from './_createPartial.js';
 import getData from './_getData.js';
 import mergeData from './_mergeData.js';
 import setData from './_setData.js';
+import setWrapToString from './_setWrapToString.js';
 import toInteger from './toInteger.js';
 
-/** Used as the `TypeError` message for "Functions" methods. */
+/** Error message constants. */
 var FUNC_ERROR_TEXT = 'Expected a function';
 
-/** Used to compose bitmasks for wrapper metadata. */
+/** Used to compose bitmasks for function metadata. */
 var BIND_FLAG = 1,
     BIND_KEY_FLAG = 2,
     CURRY_FLAG = 8,
@@ -28,7 +29,7 @@ var nativeMax = Math.max;
  *
  * @private
  * @param {Function|string} func The function or method name to wrap.
- * @param {number} bitmask The bitmask of wrapper flags.
+ * @param {number} bitmask The bitmask flags.
  *  The bitmask may be composed of the following flags:
  *     1 - `_.bind`
  *     2 - `_.bindKey`
@@ -48,7 +49,7 @@ var nativeMax = Math.max;
  * @param {number} [arity] The arity of `func`.
  * @returns {Function} Returns the new wrapped function.
  */
-function createWrapper(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
+function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
   var isBindKey = bitmask & BIND_KEY_FLAG;
   if (!isBindKey && typeof func != 'function') {
     throw new TypeError(FUNC_ERROR_TEXT);
@@ -91,16 +92,16 @@ function createWrapper(func, bitmask, thisArg, partials, holders, argPos, ary, a
     bitmask &= ~(CURRY_FLAG | CURRY_RIGHT_FLAG);
   }
   if (!bitmask || bitmask == BIND_FLAG) {
-    var result = createBaseWrapper(func, bitmask, thisArg);
+    var result = createBind(func, bitmask, thisArg);
   } else if (bitmask == CURRY_FLAG || bitmask == CURRY_RIGHT_FLAG) {
-    result = createCurryWrapper(func, bitmask, arity);
+    result = createCurry(func, bitmask, arity);
   } else if ((bitmask == PARTIAL_FLAG || bitmask == (BIND_FLAG | PARTIAL_FLAG)) && !holders.length) {
-    result = createPartialWrapper(func, bitmask, thisArg, partials);
+    result = createPartial(func, bitmask, thisArg, partials);
   } else {
-    result = createHybridWrapper.apply(undefined, newData);
+    result = createHybrid.apply(undefined, newData);
   }
   var setter = data ? baseSetData : setData;
-  return setter(result, newData);
+  return setWrapToString(setter(result, newData), func, bitmask);
 }
 
-export default createWrapper;
+export default createWrap;

_deburrLetter.js

@@ -1,13 +1,16 @@
-/** Used to map latin-1 supplementary letters to basic latin letters. */
+import basePropertyOf from './_basePropertyOf.js';
+
+/** Used to map Latin Unicode letters to basic Latin letters. */
 var deburredLetters = {
+  // Latin-1 Supplement block.
   '\xc0': 'A',  '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
   '\xe0': 'a',  '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
   '\xc7': 'C',  '\xe7': 'c',
   '\xd0': 'D',  '\xf0': 'd',
   '\xc8': 'E',  '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
   '\xe8': 'e',  '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
-  '\xcC': 'I',  '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
-  '\xeC': 'i',  '\xed': 'i', '\xee': 'i', '\xef': 'i',
+  '\xcc': 'I',  '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
+  '\xec': 'i',  '\xed': 'i', '\xee': 'i', '\xef': 'i',
   '\xd1': 'N',  '\xf1': 'n',
   '\xd2': 'O',  '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
   '\xf2': 'o',  '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
@@ -16,18 +19,53 @@ var deburredLetters = {
   '\xdd': 'Y',  '\xfd': 'y', '\xff': 'y',
   '\xc6': 'Ae', '\xe6': 'ae',
   '\xde': 'Th', '\xfe': 'th',
-  '\xdf': 'ss'
+  '\xdf': 'ss',
+  // Latin Extended-A block.
+  '\u0100': 'A',  '\u0102': 'A', '\u0104': 'A',
+  '\u0101': 'a',  '\u0103': 'a', '\u0105': 'a',
+  '\u0106': 'C',  '\u0108': 'C', '\u010a': 'C', '\u010c': 'C',
+  '\u0107': 'c',  '\u0109': 'c', '\u010b': 'c', '\u010d': 'c',
+  '\u010e': 'D',  '\u0110': 'D', '\u010f': 'd', '\u0111': 'd',
+  '\u0112': 'E',  '\u0114': 'E', '\u0116': 'E', '\u0118': 'E', '\u011a': 'E',
+  '\u0113': 'e',  '\u0115': 'e', '\u0117': 'e', '\u0119': 'e', '\u011b': 'e',
+  '\u011c': 'G',  '\u011e': 'G', '\u0120': 'G', '\u0122': 'G',
+  '\u011d': 'g',  '\u011f': 'g', '\u0121': 'g', '\u0123': 'g',
+  '\u0124': 'H',  '\u0126': 'H', '\u0125': 'h', '\u0127': 'h',
+  '\u0128': 'I',  '\u012a': 'I', '\u012c': 'I', '\u012e': 'I', '\u0130': 'I',
+  '\u0129': 'i',  '\u012b': 'i', '\u012d': 'i', '\u012f': 'i', '\u0131': 'i',
+  '\u0134': 'J',  '\u0135': 'j',
+  '\u0136': 'K',  '\u0137': 'k', '\u0138': 'k',
+  '\u0139': 'L',  '\u013b': 'L', '\u013d': 'L', '\u013f': 'L', '\u0141': 'L',
+  '\u013a': 'l',  '\u013c': 'l', '\u013e': 'l', '\u0140': 'l', '\u0142': 'l',
+  '\u0143': 'N',  '\u0145': 'N', '\u0147': 'N', '\u014a': 'N',
+  '\u0144': 'n',  '\u0146': 'n', '\u0148': 'n', '\u014b': 'n',
+  '\u014c': 'O',  '\u014e': 'O', '\u0150': 'O',
+  '\u014d': 'o',  '\u014f': 'o', '\u0151': 'o',
+  '\u0154': 'R',  '\u0156': 'R', '\u0158': 'R',
+  '\u0155': 'r',  '\u0157': 'r', '\u0159': 'r',
+  '\u015a': 'S',  '\u015c': 'S', '\u015e': 'S', '\u0160': 'S',
+  '\u015b': 's',  '\u015d': 's', '\u015f': 's', '\u0161': 's',
+  '\u0162': 'T',  '\u0164': 'T', '\u0166': 'T',
+  '\u0163': 't',  '\u0165': 't', '\u0167': 't',
+  '\u0168': 'U',  '\u016a': 'U', '\u016c': 'U', '\u016e': 'U', '\u0170': 'U', '\u0172': 'U',
+  '\u0169': 'u',  '\u016b': 'u', '\u016d': 'u', '\u016f': 'u', '\u0171': 'u', '\u0173': 'u',
+  '\u0174': 'W',  '\u0175': 'w',
+  '\u0176': 'Y',  '\u0177': 'y', '\u0178': 'Y',
+  '\u0179': 'Z',  '\u017b': 'Z', '\u017d': 'Z',
+  '\u017a': 'z',  '\u017c': 'z', '\u017e': 'z',
+  '\u0132': 'IJ', '\u0133': 'ij',
+  '\u0152': 'Oe', '\u0153': 'oe',
+  '\u0149': "'n", '\u017f': 's'
 };
 
 /**
- * Used by `_.deburr` to convert latin-1 supplementary letters to basic latin letters.
+ * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
+ * letters to basic Latin letters.
  *
  * @private
  * @param {string} letter The matched letter to deburr.
  * @returns {string} Returns the deburred letter.
  */
-function deburrLetter(letter) {
-  return deburredLetters[letter];
-}
+var deburrLetter = basePropertyOf(deburredLetters);
 
 export default deburrLetter;

_defineProperty.js

@@ -0,0 +1,11 @@
+import getNative from './_getNative.js';
+
+var defineProperty = (function() {
+  try {
+    var func = getNative(Object, 'defineProperty');
+    func({}, '', {});
+    return func;
+  } catch (e) {}
+}());
+
+export default defineProperty;

_equalArrays.js

@@ -1,5 +1,6 @@
 import SetCache from './_SetCache.js';
 import arraySome from './_arraySome.js';
+import cacheHas from './_cacheHas.js';
 
 /** Used to compose bitmasks for comparison styles. */
 var UNORDERED_COMPARE_FLAG = 1,
@@ -29,7 +30,7 @@ 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,
@@ -37,6 +38,7 @@ 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) {
@@ -58,9 +60,9 @@ function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
     // Recursively compare arrays (susceptible to call stack limits).
     if (seen) {
       if (!arraySome(other, function(othValue, othIndex) {
-            if (!seen.has(othIndex) &&
+            if (!cacheHas(seen, othIndex) &&
                 (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
-              return seen.add(othIndex);
+              return seen.push(othIndex);
             }
           })) {
         result = false;
@@ -75,6 +77,7 @@ function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
     }
   }
   stack['delete'](array);
+  stack['delete'](other);
   return result;
 }
 

_equalByTag.js

@@ -1,5 +1,6 @@
 import Symbol from './_Symbol.js';
 import Uint8Array from './_Uint8Array.js';
+import eq from './eq.js';
 import equalArrays from './_equalArrays.js';
 import mapToArray from './_mapToArray.js';
 import setToArray from './_setToArray.js';
@@ -63,22 +64,18 @@ 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,
-      // 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 + '');
 
@@ -98,10 +95,12 @@ 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) {

_equalObjects.js

@@ -1,9 +1,14 @@
-import baseHas from './_baseHas.js';
 import keys from './keys.js';
 
 /** Used to compose bitmasks for comparison styles. */
 var PARTIAL_COMPARE_FLAG = 2;
 
+/** 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 `baseIsEqualDeep` for objects with support for
  * partial deep comparisons.
@@ -31,17 +36,18 @@ 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;
     }
   }
   // 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) {
@@ -77,6 +83,7 @@ function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
     }
   }
   stack['delete'](object);
+  stack['delete'](other);
   return result;
 }
 

_escapeHtmlChar.js

@@ -1,11 +1,12 @@
+import basePropertyOf from './_basePropertyOf.js';
+
 /** Used to map characters to HTML entities. */
 var htmlEscapes = {
   '&': '&',
   '<': '&lt;',
   '>': '&gt;',
   '"': '&quot;',
-  "'": '&#39;',
-  '`': '&#96;'
+  "'": '&#39;'
 };
 
 /**
@@ -15,8 +16,6 @@ var htmlEscapes = {
  * @param {string} chr The matched character to escape.
  * @returns {string} Returns the escaped character.
  */
-function escapeHtmlChar(chr) {
-  return htmlEscapes[chr];
-}
+var escapeHtmlChar = basePropertyOf(htmlEscapes);
 
 export default escapeHtmlChar;

_flatRest.js

@@ -0,0 +1,16 @@
+import flatten from './flatten.js';
+import overRest from './_overRest.js';
+import setToString from './_setToString.js';
+
+/**
+ * A specialized version of `baseRest` which flattens the rest array.
+ *
+ * @private
+ * @param {Function} func The function to apply a rest parameter to.
+ * @returns {Function} Returns the new function.
+ */
+function flatRest(func) {
+  return setToString(overRest(func, undefined, flatten), func + '');
+}
+
+export default flatRest;

_freeGlobal.js

@@ -0,0 +1,4 @@
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+export default freeGlobal;

_getLength.js

@@ -1,16 +0,0 @@
-import baseProperty from './_baseProperty.js';
-
-/**
- * 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');
-
-export default getLength;

_getPrototype.js

@@ -1,15 +1,6 @@
-/* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf;
+import overArg from './_overArg.js';
 
-/**
- * Gets the `[[Prototype]]` of `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {null|Object} Returns the `[[Prototype]]`.
- */
-function getPrototype(value) {
-  return nativeGetPrototype(Object(value));
-}
+/** Built-in value references. */
+var getPrototype = overArg(Object.getPrototypeOf, Object);
 
 export default getPrototype;

_getSymbols.js

@@ -1,7 +1,8 @@
+import overArg from './_overArg.js';
 import stubArray from './stubArray.js';
 
-/** Built-in value references. */
-var getOwnPropertySymbols = Object.getOwnPropertySymbols;
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetSymbols = Object.getOwnPropertySymbols;
 
 /**
  * Creates an array of the own enumerable symbol properties of `object`.
@@ -10,15 +11,6 @@ var getOwnPropertySymbols = Object.getOwnPropertySymbols;
  * @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 = stubArray;
-}
+var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArray;
 
 export default getSymbols;

_getSymbolsIn.js

@@ -1,9 +1,10 @@
 import arrayPush from './_arrayPush.js';
 import getPrototype from './_getPrototype.js';
 import getSymbols from './_getSymbols.js';
+import stubArray from './stubArray.js';
 
-/** Built-in value references. */
-var getOwnPropertySymbols = Object.getOwnPropertySymbols;
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeGetSymbols = Object.getOwnPropertySymbols;
 
 /**
  * Creates an array of the own and inherited enumerable symbol properties
@@ -13,7 +14,7 @@ var getOwnPropertySymbols = Object.getOwnPropertySymbols;
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of symbols.
  */
-var getSymbolsIn = !getOwnPropertySymbols ? getSymbols : function(object) {
+var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
   var result = [];
   while (object) {
     arrayPush(result, getSymbols(object));

_getTag.js

@@ -3,6 +3,7 @@ import Map from './_Map.js';
 import Promise from './_Promise.js';
 import Set from './_Set.js';
 import WeakMap from './_WeakMap.js';
+import baseGetTag from './_baseGetTag.js';
 import toSource from './_toSource.js';
 
 /** `Object#toString` result references. */
@@ -19,7 +20,7 @@ var objectProto = Object.prototype;
 
 /**
  * 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;
@@ -38,12 +39,9 @@ var dataViewCtorString = toSource(DataView),
  * @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.
+// Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
 if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
     (Map && getTag(new Map) != mapTag) ||
     (Promise && getTag(Promise.resolve()) != promiseTag) ||