Bump to v4.17.12.

LICENSE

@@ -1,4 +1,4 @@
-Copyright jQuery Foundation and other contributors <https://jquery.org/>
+Copyright OpenJS Foundation and other contributors <https://openjsf.org/>
 
 Based on Underscore.js, copyright Jeremy Ashkenas,
 DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>

README.md

@@ -1,9 +1,9 @@
-# lodash-amd v4.13.1
+# lodash-amd v4.17.12
 
 The [Lodash](https://lodash.com/) library exported as [AMD](https://github.com/amdjs/amdjs-api/wiki/AMD) modules.
 
 Generated using [lodash-cli](https://www.npmjs.com/package/lodash-cli):
-```bash
+```shell
 $ lodash exports=amd -o ./
 $ lodash exports=amd -d -o ./main.js
 ```
@@ -11,8 +11,8 @@ $ lodash exports=amd -d -o ./main.js
 ## Installation
 
 Using npm:
-```bash
-$ {sudo -H} npm i -g npm
+```shell
+$ npm i -g npm
 $ npm i --save lodash-amd
 ```
 
@@ -27,4 +27,4 @@ require({
 });
 ```
 
-See the [package source](https://github.com/lodash/lodash/tree/4.13.1-amd) for more details.
+See the [package source](https://github.com/lodash/lodash/tree/4.17.12-amd) for more details.

_Hash.js

@@ -9,7 +9,7 @@ define(['./_hashClear', './_hashDelete', './_hashGet', './_hashHas', './_hashSet
    */
   function Hash(entries) {
     var index = -1,
-        length = entries ? entries.length : 0;
+        length = entries == null ? 0 : entries.length;
 
     this.clear();
     while (++index < length) {

_ListCache.js

@@ -9,7 +9,7 @@ define(['./_listCacheClear', './_listCacheDelete', './_listCacheGet', './_listCa
    */
   function ListCache(entries) {
     var index = -1,
-        length = entries ? entries.length : 0;
+        length = entries == null ? 0 : entries.length;
 
     this.clear();
     while (++index < length) {

_MapCache.js

@@ -9,7 +9,7 @@ define(['./_mapCacheClear', './_mapCacheDelete', './_mapCacheGet', './_mapCacheH
    */
   function MapCache(entries) {
     var index = -1,
-        length = entries ? entries.length : 0;
+        length = entries == null ? 0 : entries.length;
 
     this.clear();
     while (++index < length) {

_Reflect.js

@@ -1,7 +0,0 @@
-define(['./_root'], function(root) {
-
-  /** Built-in value references. */
-  var Reflect = root.Reflect;
-
-  return Reflect;
-});

_SetCache.js

@@ -10,7 +10,7 @@ define(['./_MapCache', './_setCacheAdd', './_setCacheHas'], function(MapCache, s
    */
   function SetCache(values) {
     var index = -1,
-        length = values ? values.length : 0;
+        length = values == null ? 0 : values.length;
 
     this.__data__ = new MapCache;
     while (++index < length) {

_Stack.js

@@ -8,7 +8,8 @@ define(['./_ListCache', './_stackClear', './_stackDelete', './_stackGet', './_st
    * @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

@@ -9,7 +9,7 @@ define([], function() {
    * @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

@@ -9,6 +9,7 @@ define([], function() {
    * @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

@@ -11,8 +11,7 @@ define([], function() {
    * @returns {*} Returns the result of `func`.
    */
   function apply(func, thisArg, args) {
-    var length = args.length;
-    switch (length) {
+    switch (args.length) {
       case 0: return func.call(thisArg);
       case 1: return func.call(thisArg, args[0]);
       case 2: return func.call(thisArg, args[0], args[1]);

_arrayAggregator.js

@@ -12,7 +12,7 @@ define([], function() {
    */
   function arrayAggregator(array, setter, iteratee, accumulator) {
     var index = -1,
-        length = array ? array.length : 0;
+        length = array == null ? 0 : array.length;
 
     while (++index < length) {
       var value = array[index];

_arrayEach.js

@@ -11,7 +11,7 @@ define([], function() {
    */
   function arrayEach(array, iteratee) {
     var index = -1,
-        length = array ? array.length : 0;
+        length = array == null ? 0 : array.length;
 
     while (++index < length) {
       if (iteratee(array[index], index, array) === false) {

_arrayEachRight.js

@@ -10,7 +10,7 @@ define([], function() {
    * @returns {Array} Returns `array`.
    */
   function arrayEachRight(array, iteratee) {
-    var length = array ? array.length : 0;
+    var length = array == null ? 0 : array.length;
 
     while (length--) {
       if (iteratee(array[length], length, array) === false) {

_arrayEvery.js

@@ -12,7 +12,7 @@ define([], function() {
    */
   function arrayEvery(array, predicate) {
     var index = -1,
-        length = array ? array.length : 0;
+        length = array == null ? 0 : array.length;
 
     while (++index < length) {
       if (!predicate(array[index], index, array)) {

_arrayFilter.js

@@ -11,7 +11,7 @@ define([], function() {
    */
   function arrayFilter(array, predicate) {
     var index = -1,
-        length = array ? array.length : 0,
+        length = array == null ? 0 : array.length,
         resIndex = 0,
         result = [];
 

_arrayIncludes.js

@@ -5,12 +5,12 @@ define(['./_baseIndexOf'], function(baseIndexOf) {
    * 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`.
    */
   function arrayIncludes(array, value) {
-    var length = array ? array.length : 0;
+    var length = array == null ? 0 : array.length;
     return !!length && baseIndexOf(array, value, 0) > -1;
   }
 

_arrayIncludesWith.js

@@ -4,14 +4,14 @@ define([], function() {
    * 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`.
    */
   function arrayIncludesWith(array, value, comparator) {
     var index = -1,
-        length = array ? array.length : 0;
+        length = array == null ? 0 : array.length;
 
     while (++index < length) {
       if (comparator(value, array[index])) {

_arrayLikeKeys.js

@@ -0,0 +1,45 @@
+define(['./_baseTimes', './isArguments', './isArray', './isBuffer', './_isIndex', './isTypedArray'], function(baseTimes, isArguments, isArray, isBuffer, isIndex, isTypedArray) {
+
+  /** 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;
+  }
+
+  return arrayLikeKeys;
+});

_arrayMap.js

@@ -11,7 +11,7 @@ define([], function() {
    */
   function arrayMap(array, iteratee) {
     var index = -1,
-        length = array ? array.length : 0,
+        length = array == null ? 0 : array.length,
         result = Array(length);
 
     while (++index < length) {

_arrayReduce.js

@@ -14,7 +14,7 @@ define([], function() {
    */
   function arrayReduce(array, iteratee, accumulator, initAccum) {
     var index = -1,
-        length = array ? array.length : 0;
+        length = array == null ? 0 : array.length;
 
     if (initAccum && length) {
       accumulator = array[++index];

_arrayReduceRight.js

@@ -13,7 +13,7 @@ define([], function() {
    * @returns {*} Returns the accumulated value.
    */
   function arrayReduceRight(array, iteratee, accumulator, initAccum) {
-    var length = array ? array.length : 0;
+    var length = array == null ? 0 : array.length;
     if (initAccum && length) {
       accumulator = array[--length];
     }

_arraySample.js

@@ -0,0 +1,19 @@
+define(['./_baseRandom'], function(baseRandom) {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /**
+   * 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;
+  }
+
+  return arraySample;
+});

_arraySampleSize.js

@@ -0,0 +1,16 @@
+define(['./_baseClamp', './_copyArray', './_shuffleSelf'], function(baseClamp, copyArray, shuffleSelf) {
+
+  /**
+   * 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));
+  }
+
+  return arraySampleSize;
+});

_arrayShuffle.js

@@ -0,0 +1,15 @@
+define(['./_copyArray', './_shuffleSelf'], function(copyArray, shuffleSelf) {
+
+  /**
+   * 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));
+  }
+
+  return arrayShuffle;
+});

_arraySome.js

@@ -12,7 +12,7 @@ define([], function() {
    */
   function arraySome(array, predicate) {
     var index = -1,
-        length = array ? array.length : 0;
+        length = array == null ? 0 : array.length;
 
     while (++index < length) {
       if (predicate(array[index], index, array)) {

_asciiSize.js

@@ -0,0 +1,13 @@
+define(['./_baseProperty'], function(baseProperty) {
+
+  /**
+   * Gets the size of an ASCII `string`.
+   *
+   * @private
+   * @param {string} string The string inspect.
+   * @returns {number} Returns the string size.
+   */
+  var asciiSize = baseProperty('length');
+
+  return asciiSize;
+});

_asciiToArray.js

@@ -0,0 +1,15 @@
+define([], function() {
+
+  /**
+   * 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('');
+  }
+
+  return asciiToArray;
+});

_asciiWords.js

@@ -0,0 +1,18 @@
+define([], function() {
+
+  /** 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) || [];
+  }
+
+  return asciiWords;
+});

_assignMergeValue.js

@@ -1,4 +1,4 @@
-define(['./eq'], function(eq) {
+define(['./_baseAssignValue', './eq'], function(baseAssignValue, eq) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -14,8 +14,8 @@ define(['./eq'], function(eq) {
    */
   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

@@ -1,4 +1,4 @@
-define(['./eq'], function(eq) {
+define(['./_baseAssignValue', './eq'], function(baseAssignValue, eq) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -11,7 +11,7 @@ define(['./eq'], function(eq) {
 
   /**
    * 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
@@ -23,7 +23,7 @@ define(['./eq'], function(eq) {
     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 @@ define(['./eq'], function(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 {Array} array The array to inspect.
    * @param {*} key The key to search for.
    * @returns {number} Returns the index of the matched value, else `-1`.
    */

_baseAssignIn.js

@@ -0,0 +1,17 @@
+define(['./_copyObject', './keysIn'], function(copyObject, keysIn) {
+
+  /**
+   * The base implementation of `_.assignIn` 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 baseAssignIn(object, source) {
+    return object && copyObject(source, keysIn(source), object);
+  }
+
+  return baseAssignIn;
+});

_baseAssignValue.js

@@ -0,0 +1,26 @@
+define(['./_defineProperty'], function(defineProperty) {
+
+  /**
+   * 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;
+    }
+  }
+
+  return baseAssignValue;
+});

_baseAt.js

@@ -8,17 +8,17 @@ define(['./get'], function(get) {
    *
    * @private
    * @param {Object} object The object to iterate over.
-   * @param {string[]} paths The property paths of elements to pick.
+   * @param {string[]} paths The property paths to pick.
    * @returns {Array} Returns the picked elements.
    */
   function baseAt(object, paths) {
     var index = -1,
-        isNil = object == null,
         length = paths.length,
-        result = Array(length);
+        result = Array(length),
+        skip = object == null;
 
     while (++index < length) {
-      result[index] = isNil ? undefined : get(object, paths[index]);
+      result[index] = skip ? undefined : get(object, paths[index]);
     }
     return result;
   }

_baseClamp.js

@@ -4,7 +4,7 @@ define([], function() {
   var undefined;
 
   /**
-   * 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

@@ -1,8 +1,13 @@
-define(['./_Stack', './_arrayEach', './_assignValue', './_baseAssign', './_cloneBuffer', './_copyArray', './_copySymbols', './_getAllKeys', './_getTag', './_initCloneArray', './_initCloneByTag', './_initCloneObject', './isArray', './isBuffer', './_isHostObject', './isObject', './keys'], function(Stack, arrayEach, assignValue, baseAssign, cloneBuffer, copyArray, copySymbols, getAllKeys, getTag, initCloneArray, initCloneByTag, initCloneObject, isArray, isBuffer, isHostObject, isObject, keys) {
+define(['./_Stack', './_arrayEach', './_assignValue', './_baseAssign', './_baseAssignIn', './_cloneBuffer', './_copyArray', './_copySymbols', './_copySymbolsIn', './_getAllKeys', './_getAllKeysIn', './_getTag', './_initCloneArray', './_initCloneByTag', './_initCloneObject', './isArray', './isBuffer', './isMap', './isObject', './isSet', './keys'], function(Stack, arrayEach, assignValue, baseAssign, baseAssignIn, cloneBuffer, copyArray, copySymbols, copySymbolsIn, getAllKeys, getAllKeysIn, getTag, initCloneArray, initCloneByTag, initCloneObject, isArray, isBuffer, isMap, isObject, isSet, keys) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
 
+  /** Used to compose bitmasks for cloning. */
+  var CLONE_DEEP_FLAG = 1,
+      CLONE_FLAT_FLAG = 2,
+      CLONE_SYMBOLS_FLAG = 4;
+
   /** `Object#toString` result references. */
   var argsTag = '[object Arguments]',
       arrayTag = '[object Array]',
@@ -54,16 +59,22 @@ define(['./_Stack', './_arrayEach', './_assignValue', './_baseAssign', './_clone
    *
    * @private
    * @param {*} value The value to clone.
-   * @param {boolean} [isDeep] Specify a deep clone.
-   * @param {boolean} [isFull] Specify a clone including symbols.
+   * @param {boolean} bitmask The bitmask flags.
+   *  1 - Deep clone
+   *  2 - Flatten inherited properties
+   *  4 - Clone 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;
+  function baseClone(value, bitmask, customizer, key, object, stack) {
+    var result,
+        isDeep = bitmask & CLONE_DEEP_FLAG,
+        isFlat = bitmask & CLONE_FLAT_FLAG,
+        isFull = bitmask & CLONE_SYMBOLS_FLAG;
+
     if (customizer) {
       result = object ? customizer(value, key, object, stack) : customizer(value);
     }
@@ -87,18 +98,17 @@ define(['./_Stack', './_arrayEach', './_assignValue', './_baseAssign', './_clone
         return cloneBuffer(value, isDeep);
       }
       if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
-        if (isHostObject(value)) {
-          return object ? value : {};
-        }
-        result = initCloneObject(isFunc ? {} : value);
+        result = (isFlat || isFunc) ? {} : initCloneObject(value);
         if (!isDeep) {
-          return copySymbols(value, baseAssign(result, value));
+          return isFlat
+            ? copySymbolsIn(value, baseAssignIn(result, value))
+            : copySymbols(value, baseAssign(result, value));
         }
       } else {
         if (!cloneableTags[tag]) {
           return object ? value : {};
         }
-        result = initCloneByTag(value, tag, baseClone, isDeep);
+        result = initCloneByTag(value, tag, isDeep);
       }
     }
     // Check for circular references and return its corresponding clone.
@@ -109,16 +119,28 @@ define(['./_Stack', './_arrayEach', './_assignValue', './_baseAssign', './_clone
     }
     stack.set(value, result);
 
-    if (!isArr) {
-      var props = isFull ? getAllKeys(value) : keys(value);
+    if (isSet(value)) {
+      value.forEach(function(subValue) {
+        result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));
+      });
+    } else if (isMap(value)) {
+      value.forEach(function(subValue, key) {
+        result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));
+      });
     }
-    // Recursively populate clone (susceptible to call stack limits).
+
+    var keysFunc = isFull
+      ? (isFlat ? getAllKeysIn : getAllKeys)
+      : (isFlat ? keysIn : keys);
+
+    var props = isArr ? undefined : keysFunc(value);
     arrayEach(props || value, function(subValue, key) {
       if (props) {
         key = subValue;
         subValue = value[key];
       }
-      assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
+      // Recursively populate clone (susceptible to call stack limits).
+      assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
     });
     return result;
   }

_baseConforms.js

@@ -1,7 +1,4 @@
-define(['./keys'], function(keys) {
-
-  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
-  var undefined;
+define(['./_baseConformsTo', './keys'], function(baseConformsTo, keys) {
 
   /**
    * The base implementation of `_.conforms` which doesn't clone `source`.
@@ -11,25 +8,9 @@ define(['./keys'], function(keys) {
    * @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 +1,33 @@
+define([], function() {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /**
+   * 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;
+  }
+
+  return baseConformsTo;
+});

_baseCreate.js

@@ -1,5 +1,8 @@
 define(['./isObject'], function(isObject) {
 
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
   /** Built-in value references. */
   var objectCreate = Object.create;
 
@@ -8,12 +11,24 @@ define(['./isObject'], function(isObject) {
    * 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;
+    };
+  }());
 
   return baseCreate;
 });

_baseDelay.js

@@ -3,18 +3,18 @@ define([], function() {
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
 
-  /** 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') {

_baseDifference.js

@@ -40,7 +40,7 @@ define(['./_SetCache', './_arrayIncludes', './_arrayIncludesWith', './_arrayMap'
     outer:
     while (++index < length) {
       var value = array[index],
-          computed = iteratee ? iteratee(value) : value;
+          computed = iteratee == null ? value : iteratee(value);
 
       value = (comparator || value !== 0) ? value : 0;
       if (isCommon && computed === computed) {

_baseFindIndex.js

@@ -5,7 +5,7 @@ define([], function() {
    * 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

@@ -6,7 +6,7 @@ define([], function() {
    * 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`.

_baseGet.js

@@ -1,4 +1,4 @@
-define(['./_castPath', './_isKey', './_toKey'], function(castPath, isKey, toKey) {
+define(['./_castPath', './_toKey'], function(castPath, toKey) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -12,7 +12,7 @@ define(['./_castPath', './_isKey', './_toKey'], function(castPath, isKey, toKey)
    * @returns {*} Returns the resolved value.
    */
   function baseGet(object, path) {
-    path = isKey(path, object) ? [path] : castPath(path);
+    path = castPath(path, object);
 
     var index = 0,
         length = path.length;

_baseGetTag.js

@@ -0,0 +1,30 @@
+define(['./_Symbol', './_getRawTag', './_objectToString'], function(Symbol, getRawTag, objectToString) {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /** `Object#toString` result references. */
+  var nullTag = '[object Null]',
+      undefinedTag = '[object Undefined]';
+
+  /** Built-in value references. */
+  var symToStringTag = Symbol ? Symbol.toStringTag : undefined;
+
+  /**
+   * The base implementation of `getTag` without fallbacks for buggy environments.
+   *
+   * @private
+   * @param {*} value The value to query.
+   * @returns {string} Returns the `toStringTag`.
+   */
+  function baseGetTag(value) {
+    if (value == null) {
+      return value === undefined ? undefinedTag : nullTag;
+    }
+    return (symToStringTag && symToStringTag in Object(value))
+      ? getRawTag(value)
+      : objectToString(value);
+  }
+
+  return baseGetTag;
+});

_baseGt.js

@@ -1,7 +1,7 @@
 define([], function() {
 
   /**
-   * 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

@@ -1,4 +1,4 @@
-define(['./_getPrototype'], function(getPrototype) {
+define([], function() {
 
   /** Used for built-in method references. */
   var objectProto = Object.prototype;
@@ -15,12 +15,7 @@ define(['./_getPrototype'], function(getPrototype) {
    * @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);
   }
 
   return baseHas;

_baseInRange.js

@@ -5,7 +5,7 @@ define([], function() {
       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 +1,18 @@
-define(['./_indexOfNaN'], function(indexOfNaN) {
+define(['./_baseFindIndex', './_baseIsNaN', './_strictIndexOf'], function(baseFindIndex, baseIsNaN, strictIndexOf) {
 
   /**
    * 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);
   }
 
   return baseIndexOf;

_baseIndexOfWith.js

@@ -4,7 +4,7 @@ define([], function() {
    * 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.

_baseInvoke.js

@@ -1,4 +1,4 @@
-define(['./_apply', './_castPath', './_isKey', './last', './_parent', './_toKey'], function(apply, castPath, isKey, last, parent, toKey) {
+define(['./_apply', './_castPath', './last', './_parent', './_toKey'], function(apply, castPath, last, parent, toKey) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -14,12 +14,9 @@ define(['./_apply', './_castPath', './_isKey', './last', './_parent', './_toKey'
    * @returns {*} Returns the result of the invoked method.
    */
   function baseInvoke(object, path, args) {
-    if (!isKey(path, object)) {
-      path = castPath(path);
-      object = parent(object, path);
-      path = last(path);
-    }
-    var func = object == null ? object : object[toKey(path)];
+    path = castPath(path, object);
+    object = parent(object, path);
+    var func = object == null ? object : object[toKey(last(path))];
     return func == null ? undefined : apply(func, object, args);
   }
 

_baseIsArguments.js

@@ -0,0 +1,18 @@
+define(['./_baseGetTag', './isObjectLike'], function(baseGetTag, isObjectLike) {
+
+  /** `Object#toString` result references. */
+  var argsTag = '[object Arguments]';
+
+  /**
+   * The base implementation of `_.isArguments`.
+   *
+   * @private
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+   */
+  function baseIsArguments(value) {
+    return isObjectLike(value) && baseGetTag(value) == argsTag;
+  }
+
+  return baseIsArguments;
+});

_baseIsArrayBuffer.js

@@ -0,0 +1,17 @@
+define(['./_baseGetTag', './isObjectLike'], function(baseGetTag, isObjectLike) {
+
+  var arrayBufferTag = '[object ArrayBuffer]';
+
+  /**
+   * 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) && baseGetTag(value) == arrayBufferTag;
+  }
+
+  return baseIsArrayBuffer;
+});

_baseIsDate.js

@@ -0,0 +1,18 @@
+define(['./_baseGetTag', './isObjectLike'], function(baseGetTag, isObjectLike) {
+
+  /** `Object#toString` result references. */
+  var dateTag = '[object Date]';
+
+  /**
+   * 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) && baseGetTag(value) == dateTag;
+  }
+
+  return baseIsDate;
+});

_baseIsEqual.js

@@ -1,4 +1,4 @@
-define(['./_baseIsEqualDeep', './isObject', './isObjectLike'], function(baseIsEqualDeep, isObject, isObjectLike) {
+define(['./_baseIsEqualDeep', './isObjectLike'], function(baseIsEqualDeep, isObjectLike) {
 
   /**
    * The base implementation of `_.isEqual` which supports partial comparisons
@@ -7,22 +7,21 @@ define(['./_baseIsEqualDeep', './isObject', './isObjectLike'], function(baseIsEq
    * @private
    * @param {*} value The value to compare.
    * @param {*} other The other value to compare.
+   * @param {boolean} bitmask The bitmask flags.
+   *  1 - Unordered comparison
+   *  2 - Partial comparison
    * @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) {
+  function baseIsEqual(value, other, bitmask, customizer, stack) {
     if (value === other) {
       return true;
     }
-    if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
+    if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {
       return value !== value && other !== other;
     }
-    return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
+    return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
   }
 
   return baseIsEqual;

_baseIsEqualDeep.js

@@ -1,7 +1,7 @@
-define(['./_Stack', './_equalArrays', './_equalByTag', './_equalObjects', './_getTag', './isArray', './_isHostObject', './isTypedArray'], function(Stack, equalArrays, equalByTag, equalObjects, getTag, isArray, isHostObject, isTypedArray) {
+define(['./_Stack', './_equalArrays', './_equalByTag', './_equalObjects', './_getTag', './isArray', './isBuffer', './isTypedArray'], function(Stack, equalArrays, equalByTag, equalObjects, getTag, isArray, isBuffer, isTypedArray) {
 
-  /** Used to compose bitmasks for comparison styles. */
-  var PARTIAL_COMPARE_FLAG = 2;
+  /** Used to compose bitmasks for value comparisons. */
+  var COMPARE_PARTIAL_FLAG = 1;
 
   /** `Object#toString` result references. */
   var argsTag = '[object Arguments]',
@@ -22,38 +22,39 @@ define(['./_Stack', './_equalArrays', './_equalByTag', './_equalObjects', './_ge
    * @private
    * @param {Object} object The object to compare.
    * @param {Object} other The other object to compare.
+   * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+   * @param {Function} customizer The function to customize comparisons.
    * @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) {
+  function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
     var objIsArr = isArray(object),
         othIsArr = isArray(other),
-        objTag = arrayTag,
-        othTag = arrayTag;
+        objTag = objIsArr ? arrayTag : getTag(object),
+        othTag = othIsArr ? arrayTag : getTag(other);
 
-    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),
+    objTag = objTag == argsTag ? objectTag : objTag;
+    othTag = othTag == argsTag ? objectTag : othTag;
+
+    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))
-        ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
-        : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+        ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
+        : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
     }
-    if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
+    if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
       var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
           othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
 
@@ -62,14 +63,14 @@ define(['./_Stack', './_equalArrays', './_equalByTag', './_equalObjects', './_ge
             othUnwrapped = othIsWrapped ? other.value() : other;
 
         stack || (stack = new Stack);
-        return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
+        return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
       }
     }
     if (!isSameTag) {
       return false;
     }
     stack || (stack = new Stack);
-    return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
+    return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
   }
 
   return baseIsEqualDeep;

_baseIsMap.js

@@ -0,0 +1,18 @@
+define(['./_getTag', './isObjectLike'], function(getTag, isObjectLike) {
+
+  /** `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;
+  }
+
+  return baseIsMap;
+});

_baseIsMatch.js

@@ -3,9 +3,9 @@ define(['./_Stack', './_baseIsEqual'], function(Stack, baseIsEqual) {
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
 
-  /** Used to compose bitmasks for comparison styles. */
-  var UNORDERED_COMPARE_FLAG = 1,
-      PARTIAL_COMPARE_FLAG = 2;
+  /** Used to compose bitmasks for value comparisons. */
+  var COMPARE_PARTIAL_FLAG = 1,
+      COMPARE_UNORDERED_FLAG = 2;
 
   /**
    * The base implementation of `_.isMatch` without support for iteratee shorthands.
@@ -51,7 +51,7 @@ define(['./_Stack', './_baseIsEqual'], function(Stack, baseIsEqual) {
           var result = customizer(objValue, srcValue, key, object, source, stack);
         }
         if (!(result === undefined
-              ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
+              ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack)
               : result
             )) {
           return false;

_baseIsNaN.js

@@ -0,0 +1,15 @@
+define([], function() {
+
+  /**
+   * 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;
+  }
+
+  return baseIsNaN;
+});

_baseIsNative.js

@@ -1,8 +1,8 @@
-define(['./isFunction', './_isHostObject', './_isMasked', './isObject', './_toSource'], function(isFunction, isHostObject, isMasked, isObject, toSource) {
+define(['./isFunction', './_isMasked', './isObject', './_toSource'], function(isFunction, isMasked, isObject, toSource) {
 
   /**
    * 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;
 
@@ -10,10 +10,11 @@ define(['./isFunction', './_isHostObject', './_isMasked', './isObject', './_toSo
   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;
@@ -36,7 +37,7 @@ define(['./isFunction', './_isHostObject', './_isMasked', './isObject', './_toSo
     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 +1,18 @@
+define(['./_baseGetTag', './isObjectLike'], function(baseGetTag, isObjectLike) {
+
+  /** `Object#toString` result references. */
+  var regexpTag = '[object RegExp]';
+
+  /**
+   * 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 isObjectLike(value) && baseGetTag(value) == regexpTag;
+  }
+
+  return baseIsRegExp;
+});

_baseIsSet.js

@@ -0,0 +1,18 @@
+define(['./_getTag', './isObjectLike'], function(getTag, isObjectLike) {
+
+  /** `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;
+  }
+
+  return baseIsSet;
+});

_baseIsTypedArray.js

@@ -0,0 +1,59 @@
+define(['./_baseGetTag', './isLength', './isObjectLike'], function(baseGetTag, isLength, isObjectLike) {
+
+  /** `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;
+
+  /**
+   * The base implementation of `_.isTypedArray` without Node.js optimizations.
+   *
+   * @private
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+   */
+  function baseIsTypedArray(value) {
+    return isObjectLike(value) &&
+      isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
+  }
+
+  return baseIsTypedArray;
+});

_baseKeys.js

@@ -1,18 +1,29 @@
-define([], function() {
+define(['./_isPrototype', './_nativeKeys'], function(isPrototype, nativeKeys) {
 
-  /* Built-in method references for those with the same name as other `lodash` methods. */
-  var nativeKeys = Object.keys;
+  /** 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;
   }
 
   return baseKeys;

_baseKeysIn.js

@@ -1,39 +1,32 @@
-define(['./_Reflect', './_iteratorToArray'], function(Reflect, iteratorToArray) {
-
-  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
-  var undefined;
+define(['./isObject', './_isPrototype', './_nativeKeysIn'], function(isObject, isPrototype, nativeKeysIn) {
 
   /** 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));
-    };
-  }
-
   return baseKeysIn;
 });

_baseLt.js

@@ -1,7 +1,7 @@
 define([], function() {
 
   /**
-   * 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.

_baseMatchesProperty.js

@@ -3,9 +3,9 @@ define(['./_baseIsEqual', './get', './hasIn', './_isKey', './_isStrictComparable
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
 
-  /** Used to compose bitmasks for comparison styles. */
-  var UNORDERED_COMPARE_FLAG = 1,
-      PARTIAL_COMPARE_FLAG = 2;
+  /** Used to compose bitmasks for value comparisons. */
+  var COMPARE_PARTIAL_FLAG = 1,
+      COMPARE_UNORDERED_FLAG = 2;
 
   /**
    * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
@@ -23,7 +23,7 @@ define(['./_baseIsEqual', './get', './hasIn', './_isKey', './_isStrictComparable
       var objValue = get(object, path);
       return (objValue === undefined && objValue === srcValue)
         ? hasIn(object, path)
-        : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
+        : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);
     };
   }
 

_baseMean.js

@@ -13,7 +13,7 @@ define(['./_baseSum'], function(baseSum) {
    * @returns {number} Returns the mean.
    */
   function baseMean(array, iteratee) {
-    var length = array ? array.length : 0;
+    var length = array == null ? 0 : array.length;
     return length ? (baseSum(array, iteratee) / length) : NAN;
   }
 

_baseMerge.js

@@ -1,4 +1,4 @@
-define(['./_Stack', './_arrayEach', './_assignMergeValue', './_baseMergeDeep', './isArray', './isObject', './isTypedArray', './keysIn'], function(Stack, arrayEach, assignMergeValue, baseMergeDeep, isArray, isObject, isTypedArray, keysIn) {
+define(['./_Stack', './_assignMergeValue', './_baseFor', './_baseMergeDeep', './isObject', './keysIn', './_safeGet'], function(Stack, assignMergeValue, baseFor, baseMergeDeep, isObject, keysIn, safeGet) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -18,21 +18,14 @@ define(['./_Stack', './_arrayEach', './_assignMergeValue', './_baseMergeDeep', '
     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) {
+      stack || (stack = new Stack);
       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)
+          ? customizer(safeGet(object, key), srcValue, (key + ''), object, source, stack)
           : undefined;
 
         if (newValue === undefined) {
@@ -40,7 +33,7 @@ define(['./_Stack', './_arrayEach', './_assignMergeValue', './_baseMergeDeep', '
         }
         assignMergeValue(object, key, newValue);
       }
-    });
+    }, keysIn);
   }
 
   return baseMerge;

_baseMergeDeep.js

@@ -1,4 +1,4 @@
-define(['./_assignMergeValue', './_baseClone', './_copyArray', './isArguments', './isArray', './isArrayLikeObject', './isFunction', './isObject', './isPlainObject', './isTypedArray', './toPlainObject'], function(assignMergeValue, baseClone, copyArray, isArguments, isArray, isArrayLikeObject, isFunction, isObject, isPlainObject, isTypedArray, toPlainObject) {
+define(['./_assignMergeValue', './_cloneBuffer', './_cloneTypedArray', './_copyArray', './_initCloneObject', './isArguments', './isArray', './isArrayLikeObject', './isBuffer', './isFunction', './isObject', './isPlainObject', './isTypedArray', './_safeGet', './toPlainObject'], function(assignMergeValue, cloneBuffer, cloneTypedArray, copyArray, initCloneObject, isArguments, isArray, isArrayLikeObject, isBuffer, isFunction, isObject, isPlainObject, isTypedArray, safeGet, toPlainObject) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -19,8 +19,8 @@ define(['./_assignMergeValue', './_baseClone', './_copyArray', './isArguments',
    *  counterparts.
    */
   function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
-    var objValue = object[key],
-        srcValue = source[key],
+    var objValue = safeGet(object, key),
+        srcValue = safeGet(source, key),
         stacked = stack.get(srcValue);
 
     if (stacked) {
@@ -34,42 +34,49 @@ define(['./_assignMergeValue', './_baseClone', './_copyArray', './isArguments',
     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;
+        else if (!isObject(objValue) || isFunction(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

@@ -4,7 +4,7 @@ define(['./_isIndex'], function(isIndex) {
   var undefined;
 
   /**
-   * 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 @@
-define(['./_arrayReduce'], function(arrayReduce) {
+define(['./_basePickBy', './hasIn'], function(basePickBy, hasIn) {
 
   /**
    * The base implementation of `_.pick` without support for individual
@@ -6,17 +6,13 @@ define(['./_arrayReduce'], function(arrayReduce) {
    *
    * @private
    * @param {Object} object The source object.
-   * @param {string[]} props The property identifiers to pick.
+   * @param {string[]} paths The property paths 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;
-    }, {});
+  function basePick(object, paths) {
+    return basePickBy(object, paths, function(value, path) {
+      return hasIn(object, path);
+    });
   }
 
   return basePick;

_basePickBy.js

@@ -1,25 +1,25 @@
-define(['./_getAllKeysIn'], function(getAllKeysIn) {
+define(['./_baseGet', './_baseSet', './_castPath'], function(baseGet, baseSet, castPath) {
 
   /**
    * The base implementation of  `_.pickBy` without support for iteratee shorthands.
    *
    * @private
    * @param {Object} object The source object.
+   * @param {string[]} paths The property paths to pick.
    * @param {Function} predicate The function invoked per property.
    * @returns {Object} Returns the new object.
    */
-  function basePickBy(object, predicate) {
+  function basePickBy(object, paths, predicate) {
     var index = -1,
-        props = getAllKeysIn(object),
-        length = props.length,
+        length = paths.length,
         result = {};
 
     while (++index < length) {
-      var key = props[index],
-          value = object[key];
+      var path = paths[index],
+          value = baseGet(object, path);
 
-      if (predicate(value, key)) {
-        result[key] = value;
+      if (predicate(value, path)) {
+        baseSet(result, castPath(path, object), value);
       }
     }
     return result;

_basePropertyOf.js

@@ -0,0 +1,20 @@
+define([], function() {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /**
+   * 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];
+    };
+  }
+
+  return basePropertyOf;
+});

_basePullAt.js

@@ -1,4 +1,4 @@
-define(['./_castPath', './_isIndex', './_isKey', './last', './_parent', './_toKey'], function(castPath, isIndex, isKey, last, parent, toKey) {
+define(['./_baseUnset', './_isIndex'], function(baseUnset, isIndex) {
 
   /** Used for built-in method references. */
   var arrayProto = Array.prototype;
@@ -25,17 +25,8 @@ define(['./_castPath', './_isIndex', './_isKey', './last', './_parent', './_toKe
         var previous = index;
         if (isIndex(index)) {
           splice.call(array, index, 1);
-        }
-        else if (!isKey(index, array)) {
-          var path = castPath(index),
-              object = parent(array, path);
-
-          if (object != null) {
-            delete object[toKey(last(path))];
-          }
-        }
-        else {
-          delete array[toKey(index)];
+        } else {
+          baseUnset(array, index);
         }
       }
     }

_baseRange.js

@@ -6,7 +6,7 @@ define([], function() {
 
   /**
    * 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 +1,16 @@
+define(['./identity', './_overRest', './_setToString'], function(identity, overRest, setToString) {
+
+  /**
+   * 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 + '');
+  }
+
+  return baseRest;
+});

_baseSample.js

@@ -0,0 +1,15 @@
+define(['./_arraySample', './values'], function(arraySample, values) {
+
+  /**
+   * 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));
+  }
+
+  return baseSample;
+});

_baseSampleSize.js

@@ -0,0 +1,17 @@
+define(['./_baseClamp', './_shuffleSelf', './values'], function(baseClamp, shuffleSelf, values) {
+
+  /**
+   * 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));
+  }
+
+  return baseSampleSize;
+});

_baseSet.js

@@ -1,4 +1,4 @@
-define(['./_assignValue', './_castPath', './_isIndex', './_isKey', './isObject', './_toKey'], function(assignValue, castPath, isIndex, isKey, isObject, toKey) {
+define(['./_assignValue', './_castPath', './_isIndex', './isObject', './_toKey'], function(assignValue, castPath, isIndex, isObject, toKey) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -7,14 +7,17 @@ define(['./_assignValue', './_castPath', './_isIndex', './_isKey', './isObject',
    * 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) {
-    path = isKey(path, object) ? [path] : castPath(path);
+    if (!isObject(object)) {
+      return object;
+    }
+    path = castPath(path, object);
 
     var index = -1,
         length = path.length,
@@ -22,20 +25,19 @@ define(['./_assignValue', './_castPath', './_isIndex', './_isKey', './isObject',
         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

@@ -1,7 +1,7 @@
 define(['./identity', './_metaMap'], function(identity, metaMap) {
 
   /**
-   * 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 +1,21 @@
+define(['./constant', './_defineProperty', './identity'], function(constant, defineProperty, identity) {
+
+  /**
+   * 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
+    });
+  };
+
+  return baseSetToString;
+});

_baseShuffle.js

@@ -0,0 +1,15 @@
+define(['./_shuffleSelf', './values'], function(shuffleSelf, values) {
+
+  /**
+   * 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));
+  }
+
+  return baseShuffle;
+});

_baseSortedIndex.js

@@ -18,7 +18,7 @@ define(['./_baseSortedIndexBy', './identity', './isSymbol'], function(baseSorted
    */
   function baseSortedIndex(array, value, retHighest) {
     var low = 0,
-        high = array ? array.length : low;
+        high = array == null ? low : array.length;
 
     if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
       while (low < high) {

_baseSortedIndexBy.js

@@ -28,7 +28,7 @@ define(['./isSymbol'], function(isSymbol) {
     value = iteratee(value);
 
     var low = 0,
-        high = array ? array.length : 0,
+        high = array == null ? 0 : array.length,
         valIsNaN = value !== value,
         valIsNull = value === null,
         valIsSymbol = isSymbol(value),

_baseToString.js

@@ -1,4 +1,4 @@
-define(['./_Symbol', './isSymbol'], function(Symbol, isSymbol) {
+define(['./_Symbol', './_arrayMap', './isArray', './isSymbol'], function(Symbol, arrayMap, isArray, isSymbol) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -23,6 +23,10 @@ define(['./_Symbol', './isSymbol'], function(Symbol, isSymbol) {
     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

@@ -1,7 +1,7 @@
 define([], function() {
 
   /**
-   * 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

@@ -1,19 +1,17 @@
-define(['./_baseHas', './_castPath', './_isKey', './last', './_parent', './_toKey'], function(baseHas, castPath, isKey, last, parent, toKey) {
+define(['./_castPath', './last', './_parent', './_toKey'], function(castPath, last, parent, toKey) {
 
   /**
    * The base implementation of `_.unset`.
    *
    * @private
    * @param {Object} object The object to modify.
-   * @param {Array|string} path The path of the property to unset.
+   * @param {Array|string} path The property path to unset.
    * @returns {boolean} Returns `true` if the property is deleted, else `false`.
    */
   function baseUnset(object, path) {
-    path = isKey(path, object) ? [path] : castPath(path);
+    path = castPath(path, object);
     object = parent(object, path);
-
-    var key = toKey(last(path));
-    return !(object != null && baseHas(object, key)) || delete object[key];
+    return object == null || delete object[toKey(last(path))];
   }
 
   return baseUnset;

_baseUpdate.js

@@ -4,7 +4,7 @@ define(['./_baseGet', './_baseSet'], function(baseGet, baseSet) {
    * 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.

_baseXor.js

@@ -1,4 +1,4 @@
-define(['./_arrayPush', './_baseDifference', './_baseUniq'], function(arrayPush, baseDifference, baseUniq) {
+define(['./_baseDifference', './_baseFlatten', './_baseUniq'], function(baseDifference, baseFlatten, baseUniq) {
 
   /**
    * The base implementation of methods like `_.xor`, without support for
@@ -11,18 +11,24 @@ define(['./_arrayPush', './_baseDifference', './_baseUniq'], function(arrayPush,
    * @returns {Array} Returns the new array of values.
    */
   function baseXor(arrays, iteratee, comparator) {
+    var length = arrays.length;
+    if (length < 2) {
+      return length ? baseUniq(arrays[0]) : [];
+    }
     var index = -1,
-        length = arrays.length;
+        result = Array(length);
 
     while (++index < length) {
-      var result = result
-        ? arrayPush(
-            baseDifference(result, arrays[index], iteratee, comparator),
-            baseDifference(arrays[index], result, iteratee, comparator)
-          )
-        : arrays[index];
+      var array = arrays[index],
+          othIndex = -1;
+
+      while (++othIndex < length) {
+        if (othIndex != index) {
+          result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
+        }
+      }
     }
-    return (result && result.length) ? baseUniq(result, iteratee, comparator) : [];
+    return baseUniq(baseFlatten(result, 1), iteratee, comparator);
   }
 
   return baseXor;

_cacheHas.js

@@ -1,7 +1,7 @@
 define([], function() {
 
   /**
-   * Checks if a cache value for `key` exists.
+   * Checks if a `cache` value for `key` exists.
    *
    * @private
    * @param {Object} cache The cache to query.

_castPath.js

@@ -1,14 +1,18 @@
-define(['./isArray', './_stringToPath'], function(isArray, stringToPath) {
+define(['./isArray', './_isKey', './_stringToPath', './toString'], function(isArray, isKey, stringToPath, toString) {
 
   /**
    * Casts `value` to a path array if it's not one.
    *
    * @private
    * @param {*} value The value to inspect.
+   * @param {Object} [object] The object to query keys on.
    * @returns {Array} Returns the cast property path array.
    */
-  function castPath(value) {
-    return isArray(value) ? value : stringToPath(value);
+  function castPath(value, object) {
+    if (isArray(value)) {
+      return value;
+    }
+    return isKey(value, object) ? [value] : stringToPath(toString(value));
   }
 
   return castPath;

_castRest.js

@@ -0,0 +1,15 @@
+define(['./_baseRest'], function(baseRest) {
+
+  /**
+   * 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;
+
+  return castRest;
+});

_checkGlobal.js

@@ -1,15 +0,0 @@
-define([], function() {
-
-  /**
-   * 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;
-  }
-
-  return checkGlobal;
-});

_cloneBuffer.js

@@ -1,4 +1,20 @@
-define([], function() {
+define(['./_root'], function(root) {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /** 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`.
@@ -12,7 +28,9 @@ define([], function() {
     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;
   }

_cloneMap.js

@@ -1,5 +1,8 @@
 define(['./_addMapEntry', './_arrayReduce', './_mapToArray'], function(addMapEntry, arrayReduce, mapToArray) {
 
+  /** Used to compose bitmasks for cloning. */
+  var CLONE_DEEP_FLAG = 1;
+
   /**
    * Creates a clone of `map`.
    *
@@ -10,7 +13,7 @@ define(['./_addMapEntry', './_arrayReduce', './_mapToArray'], function(addMapEnt
    * @returns {Object} Returns the cloned map.
    */
   function cloneMap(map, isDeep, cloneFunc) {
-    var array = isDeep ? cloneFunc(mapToArray(map), true) : mapToArray(map);
+    var array = isDeep ? cloneFunc(mapToArray(map), CLONE_DEEP_FLAG) : mapToArray(map);
     return arrayReduce(array, addMapEntry, new map.constructor);
   }
 

_cloneSet.js

@@ -1,5 +1,8 @@
 define(['./_addSetEntry', './_arrayReduce', './_setToArray'], function(addSetEntry, arrayReduce, setToArray) {
 
+  /** Used to compose bitmasks for cloning. */
+  var CLONE_DEEP_FLAG = 1;
+
   /**
    * Creates a clone of `set`.
    *
@@ -10,7 +13,7 @@ define(['./_addSetEntry', './_arrayReduce', './_setToArray'], function(addSetEnt
    * @returns {Object} Returns the cloned set.
    */
   function cloneSet(set, isDeep, cloneFunc) {
-    var array = isDeep ? cloneFunc(setToArray(set), true) : setToArray(set);
+    var array = isDeep ? cloneFunc(setToArray(set), CLONE_DEEP_FLAG) : setToArray(set);
     return arrayReduce(array, addSetEntry, new set.constructor);
   }
 

_copyObject.js

@@ -1,4 +1,7 @@
-define(['./_assignValue'], function(assignValue) {
+define(['./_assignValue', './_baseAssignValue'], function(assignValue, baseAssignValue) {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
 
   /**
    * Copies properties of `source` to `object`.
@@ -11,6 +14,7 @@ define(['./_assignValue'], function(assignValue) {
    * @returns {Object} Returns `object`.
    */
   function copyObject(source, props, object, customizer) {
+    var isNew = !object;
     object || (object = {});
 
     var index = -1,
@@ -21,9 +25,16 @@ define(['./_assignValue'], function(assignValue) {
 
       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;
   }

_copySymbols.js

@@ -1,7 +1,7 @@
 define(['./_copyObject', './_getSymbols'], function(copyObject, getSymbols) {
 
   /**
-   * Copies own symbol properties of `source` to `object`.
+   * Copies own symbols of `source` to `object`.
    *
    * @private
    * @param {Object} source The object to copy symbols from.