Bump to v4.6.1.

LICENSE

@@ -1,22 +1,23 @@
+The MIT License (MIT)
+
 Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
 Based on Underscore.js, copyright 2009-2016 Jeremy Ashkenas,
 DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>
 
-Permission is hereby granted, free of charge, to any person obtaining
+Permission is hereby granted, free of charge, to any person obtaining a copy
-a copy of this software and associated documentation files (the
+of this software and associated documentation files (the "Software"), to deal
-"Software"), to deal in the Software without restriction, including
+in the Software without restriction, including without limitation the rights
-without limitation the rights to use, copy, modify, merge, publish,
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-distribute, sublicense, and/or sell copies of the Software, and to
+copies of the Software, and to permit persons to whom the Software is
-permit persons to whom the Software is furnished to do so, subject to
+furnished to do so, subject to the following conditions:
-the following conditions:
 
-The above copyright notice and this permission notice shall be
+The above copyright notice and this permission notice shall be included in all
-included in all copies or substantial portions of the Software.
+copies or substantial portions of the Software.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+SOFTWARE.

README.md

@@ -1,4 +1,4 @@
-# lodash v4.1.0
+# lodash v4.6.1
 
 The [lodash](https://lodash.com/) library exported as [Node.js](https://nodejs.org/) modules.
 
@@ -12,45 +12,29 @@ $ npm i --save lodash
 
 In Node.js:
 ```js
-// load the full build
+// Load the full build.
 var _ = require('lodash');
-// load the core build
+// Load the core build.
 var _ = require('lodash/core');
-// load the fp build for immutable auto-curried iteratee-first data-last methods
+// Load the fp build for immutable auto-curried iteratee-first data-last methods.
 var _ = require('lodash/fp');
 
-// or a method category
+// Load a method category.
 var array = require('lodash/array');
 var object = require('lodash/fp/object');
 
-// or method for smaller builds with browserify/rollup/webpack
+// Load a single method for smaller builds with browserify/rollup/webpack.
 var chunk = require('lodash/chunk');
 var extend = require('lodash/fp/extend');
 ```
 
-See the [package source](https://github.com/lodash/lodash/tree/4.1.0-npm) for more details.
+See the [package source](https://github.com/lodash/lodash/tree/4.6.1-npm) for more details.
 
 **Note:**<br>
 Don’t assign values to the [special variable](http://nodejs.org/api/repl.html#repl_repl_features) `_` when in the REPL.<br>
 Install [n_](https://www.npmjs.com/package/n_) for a REPL that includes lodash by default.
 
-## Module formats
-
-Lodash is also available in a variety of other builds & module formats.
-
- * [lodash](https://www.npmjs.com/package/lodash) & [per method](https://www.npmjs.com/browse/keyword/lodash-modularized) packages
- * [lodash-amd](https://www.npmjs.com/package/lodash-amd)
- * [lodash-es](https://www.npmjs.com/package/lodash-es) & [babel-plugin-lodash](https://www.npmjs.com/package/babel-plugin-lodash)
-
-## Further Reading
-
-  * [API Documentation](https://lodash.com/docs)
-  * [Build Differences](https://github.com/lodash/lodash/wiki/Build-Differences)
-  * [Changelog](https://github.com/lodash/lodash/wiki/Changelog)
-  * [Roadmap](https://github.com/lodash/lodash/wiki/Roadmap)
-  * [More Resources](https://github.com/lodash/lodash/wiki/Resources)
-
 ## Support
 
-Tested in Chrome 46-47, Firefox 42-43, IE 9-11, Edge 13, Safari 8-9, Node.js 0.10, 0.12, 4, & 5, & PhantomJS 1.9.8.
+Tested in Chrome 47-48, Firefox 43-44, IE 9-11, Edge 13, Safari 8-9, Node.js 0.10, 0.12, 4, & 5, & PhantomJS 1.9.8.<br>
-Automated [browser](https://saucelabs.com/u/lodash) & [CI](https://travis-ci.org/lodash/lodash/) test runs are available. Special thanks to [Sauce Labs](https://saucelabs.com/) for providing automated browser testing.
+Automated [browser](https://saucelabs.com/u/lodash) & [CI](https://travis-ci.org/lodash/lodash/) test runs are available.

_Hash.js

@@ -1,12 +1,13 @@
 var nativeCreate = require('./_nativeCreate');
 
 /** Used for built-in method references. */
-var objectProto = global.Object.prototype;
+var objectProto = Object.prototype;
 
 /**
  * Creates an hash object.
  *
  * @private
+ * @constructor
  * @returns {Object} Returns the new hash object.
  */
 function Hash() {}

_LazyWrapper.js

@@ -8,6 +8,7 @@ var MAX_ARRAY_LENGTH = 4294967295;
  * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
  *
  * @private
+ * @constructor
  * @param {*} value The value to wrap.
  */
 function LazyWrapper(value) {

_Map.js

@@ -1,6 +1,7 @@
-var getNative = require('./_getNative');
+var getNative = require('./_getNative'),
+    root = require('./_root');
 
 /* Built-in method references that are verified to be native. */
-var Map = getNative(global, 'Map');
+var Map = getNative(root, 'Map');
 
 module.exports = Map;

_MapCache.js

@@ -8,6 +8,7 @@ var mapClear = require('./_mapClear'),
  * Creates a map cache object to store key-value pairs.
  *
  * @private
+ * @constructor
  * @param {Array} [values] The values to cache.
  */
 function MapCache(values) {

_Reflect.js

@@ -1,4 +1,6 @@
+var root = require('./_root');
+
 /** Built-in value references. */
-var Reflect = global.Reflect;
+var Reflect = root.Reflect;
 
 module.exports = Reflect;

_Set.js

@@ -1,6 +1,7 @@
-var getNative = require('./_getNative');
+var getNative = require('./_getNative'),
+    root = require('./_root');
 
 /* Built-in method references that are verified to be native. */
-var Set = getNative(global, 'Set');
+var Set = getNative(root, 'Set');
 
 module.exports = Set;

_SetCache.js

@@ -6,6 +6,7 @@ var MapCache = require('./_MapCache'),
  * Creates a set cache object to store unique values.
  *
  * @private
+ * @constructor
  * @param {Array} [values] The values to cache.
  */
 function SetCache(values) {

_Stack.js

@@ -8,6 +8,7 @@ var stackClear = require('./_stackClear'),
  * Creates a stack cache object to store key-value pairs.
  *
  * @private
+ * @constructor
  * @param {Array} [values] The values to cache.
  */
 function Stack(values) {

_Symbol.js

@@ -1,4 +1,6 @@
+var root = require('./_root');
+
 /** Built-in value references. */
-var Symbol = global.Symbol;
+var Symbol = root.Symbol;
 
 module.exports = Symbol;

_Uint8Array.js

@@ -1,4 +1,6 @@
+var root = require('./_root');
+
 /** Built-in value references. */
-var Uint8Array = global.Uint8Array;
+var Uint8Array = root.Uint8Array;
 
 module.exports = Uint8Array;

_WeakMap.js

@@ -1,6 +1,7 @@
-var getNative = require('./_getNative');
+var getNative = require('./_getNative'),
+    root = require('./_root');
 
 /* Built-in method references that are verified to be native. */
-var WeakMap = getNative(global, 'WeakMap');
+var WeakMap = getNative(root, 'WeakMap');
 
 module.exports = WeakMap;

_addMapEntry.js

@@ -7,6 +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.
   map.set(pair[0], pair[1]);
   return map;
 }

_apply.js

@@ -5,11 +5,11 @@
  * @private
  * @param {Function} func The function to invoke.
  * @param {*} thisArg The `this` binding of `func`.
- * @param {...*} [args] The arguments to invoke `func` with.
+ * @param {...*} args The arguments to invoke `func` with.
  * @returns {*} Returns the result of `func`.
  */
 function apply(func, thisArg, args) {
-  var length = args ? args.length : 0;
+  var length = args.length;
   switch (length) {
     case 0: return func.call(thisArg);
     case 1: return func.call(thisArg, args[0]);

_arrayFilter.js

@@ -10,13 +10,13 @@
 function arrayFilter(array, predicate) {
   var index = -1,
       length = array.length,
-      resIndex = -1,
+      resIndex = 0,
       result = [];
 
   while (++index < length) {
     var value = array[index];
     if (predicate(value, index, array)) {
-      result[++resIndex] = value;
+      result[resIndex++] = value;
     }
   }
   return result;

_arrayIncludesWith.js

@@ -1,6 +1,5 @@
 /**
- * A specialized version of `_.includesWith` for arrays without support for
+ * This function is like `arrayIncludes` except that it accepts a comparator.
- * specifying an index to search from.
  *
  * @private
  * @param {Array} array The array to search.

_assignInDefaults.js

@@ -1,7 +1,7 @@
 var eq = require('./eq');
 
 /** Used for built-in method references. */
-var objectProto = global.Object.prototype;
+var objectProto = Object.prototype;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;

_assignMergeValue.js

@@ -1,7 +1,8 @@
 var eq = require('./eq');
 
 /**
- * This function is like `assignValue` except that it doesn't assign `undefined` values.
+ * This function is like `assignValue` except that it doesn't assign
+ * `undefined` values.
  *
  * @private
  * @param {Object} object The object to modify.

_assignValue.js

@@ -1,7 +1,7 @@
 var eq = require('./eq');
 
 /** Used for built-in method references. */
-var objectProto = global.Object.prototype;
+var objectProto = Object.prototype;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
@@ -18,8 +18,7 @@ var hasOwnProperty = objectProto.hasOwnProperty;
  */
 function assignValue(object, key, value) {
   var objValue = object[key];
-  if ((!eq(objValue, value) ||
+  if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
-        (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) ||
       (value === undefined && !(key in object))) {
     object[key] = value;
   }

_assocDelete.js

@@ -1,7 +1,7 @@
 var assocIndexOf = require('./_assocIndexOf');
 
 /** Used for built-in method references. */
-var arrayProto = global.Array.prototype;
+var arrayProto = Array.prototype;
 
 /** Built-in value references. */
 var splice = arrayProto.splice;

_baseCastArrayLikeObject.js

@@ -0,0 +1,14 @@
+var isArrayLikeObject = require('./isArrayLikeObject');
+
+/**
+ * Casts `value` to an empty array if it's not an array like object.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the array-like object.
+ */
+function baseCastArrayLikeObject(value) {
+  return isArrayLikeObject(value) ? value : [];
+}
+
+module.exports = baseCastArrayLikeObject;

_baseCastFunction.js

@@ -0,0 +1,14 @@
+var identity = require('./identity');
+
+/**
+ * Casts `value` to `identity` if it's not a function.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the array-like object.
+ */
+function baseCastFunction(value) {
+  return typeof value == 'function' ? value : identity;
+}
+
+module.exports = baseCastFunction;

_baseCastPath.js

@@ -0,0 +1,15 @@
+var isArray = require('./isArray'),
+    stringToPath = require('./_stringToPath');
+
+/**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast property path array.
+ */
+function baseCastPath(value) {
+  return isArray(value) ? value : stringToPath(value);
+}
+
+module.exports = baseCastPath;

_baseClone.js

@@ -3,6 +3,7 @@ var Stack = require('./_Stack'),
     assignValue = require('./_assignValue'),
     baseAssign = require('./_baseAssign'),
     baseForOwn = require('./_baseForOwn'),
+    cloneBuffer = require('./_cloneBuffer'),
     copyArray = require('./_copyArray'),
     copySymbols = require('./_copySymbols'),
     getTag = require('./_getTag'),
@@ -10,6 +11,7 @@ var Stack = require('./_Stack'),
     initCloneByTag = require('./_initCloneByTag'),
     initCloneObject = require('./_initCloneObject'),
     isArray = require('./isArray'),
+    isBuffer = require('./isBuffer'),
     isHostObject = require('./_isHostObject'),
     isObject = require('./isObject');
 
@@ -64,13 +66,14 @@ cloneableTags[weakMapTag] = false;
  * @private
  * @param {*} value The value to clone.
  * @param {boolean} [isDeep] Specify a deep clone.
+ * @param {boolean} [isFull] Specify a clone including symbols.
  * @param {Function} [customizer] The function to customize cloning.
  * @param {string} [key] The key of `value`.
  * @param {Object} [object] The parent object of `value`.
  * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
  * @returns {*} Returns the cloned value.
  */
-function baseClone(value, isDeep, customizer, key, object, stack) {
+function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
   var result;
   if (customizer) {
     result = object ? customizer(value, key, object, stack) : customizer(value);
@@ -91,18 +94,23 @@ function baseClone(value, isDeep, customizer, key, object, stack) {
     var tag = getTag(value),
         isFunc = tag == funcTag || tag == genTag;
 
+    if (isBuffer(value)) {
+      return cloneBuffer(value, isDeep);
+    }
     if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
       if (isHostObject(value)) {
         return object ? value : {};
       }
       result = initCloneObject(isFunc ? {} : value);
       if (!isDeep) {
-        return copySymbols(value, baseAssign(result, value));
+        result = baseAssign(result, value);
+        return isFull ? copySymbols(value, result) : result;
       }
     } else {
-      return cloneableTags[tag]
+      if (!cloneableTags[tag]) {
-        ? initCloneByTag(value, tag, isDeep)
+        return object ? value : {};
-        : (object ? value : {});
+      }
+      result = initCloneByTag(value, tag, isDeep);
     }
   }
   // Check for circular references and return its corresponding clone.
@@ -115,9 +123,9 @@ function baseClone(value, isDeep, customizer, key, object, stack) {
 
   // Recursively populate clone (susceptible to call stack limits).
   (isArr ? arrayEach : baseForOwn)(value, function(subValue, key) {
-    assignValue(result, key, baseClone(subValue, isDeep, customizer, key, value, stack));
+    assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
   });
-  return isArr ? result : copySymbols(value, result);
+  return (isFull && !isArr) ? copySymbols(value, result) : result;
 }
 
 module.exports = baseClone;

_baseCreate.js

@@ -1,5 +1,8 @@
 var isObject = require('./isObject');
 
+/** Built-in value references. */
+var objectCreate = Object.create;
+
 /**
  * The base implementation of `_.create` without support for assigning
  * properties to the created object.
@@ -8,16 +11,8 @@ var isObject = require('./isObject');
  * @param {Object} prototype The object to inherit from.
  * @returns {Object} Returns the new object.
  */
-var baseCreate = (function() {
+function baseCreate(proto) {
-  function object() {}
+  return isObject(proto) ? objectCreate(proto) : {};
-  return function(prototype) {
+}
-    if (isObject(prototype)) {
-      object.prototype = prototype;
-      var result = new object;
-      object.prototype = undefined;
-    }
-    return result || {};
-  };
-}());
 
 module.exports = baseCreate;

_baseDelay.js

@@ -8,7 +8,7 @@ var FUNC_ERROR_TEXT = 'Expected a function';
  * @private
  * @param {Function} func The function to delay.
  * @param {number} wait The number of milliseconds to delay invocation.
- * @param {Object} args The arguments provide to `func`.
+ * @param {Object} args The arguments to provide to `func`.
  * @returns {number} Returns the timer id.
  */
 function baseDelay(func, wait, args) {

_baseFlatten.js

@@ -8,12 +8,12 @@ var arrayPush = require('./_arrayPush'),
  *
  * @private
  * @param {Array} array The array to flatten.
- * @param {boolean} [isDeep] Specify a deep flatten.
+ * @param {number} depth The maximum recursion depth.
  * @param {boolean} [isStrict] Restrict flattening to arrays-like objects.
  * @param {Array} [result=[]] The initial result value.
  * @returns {Array} Returns the new flattened array.
  */
-function baseFlatten(array, isDeep, isStrict, result) {
+function baseFlatten(array, depth, isStrict, result) {
   result || (result = []);
 
   var index = -1,
@@ -21,11 +21,11 @@ function baseFlatten(array, isDeep, isStrict, result) {
 
   while (++index < length) {
     var value = array[index];
-    if (isArrayLikeObject(value) &&
+    if (depth > 0 && isArrayLikeObject(value) &&
         (isStrict || isArray(value) || isArguments(value))) {
-      if (isDeep) {
+      if (depth > 1) {
         // Recursively flatten arrays (susceptible to call stack limits).
-        baseFlatten(value, isDeep, isStrict, result);
+        baseFlatten(value, depth - 1, isStrict, result);
       } else {
         arrayPush(result, value);
       }

_baseFunctions.js

@@ -3,7 +3,7 @@ var arrayFilter = require('./_arrayFilter'),
 
 /**
  * The base implementation of `_.functions` which creates an array of
- * `object` function property names filtered from those provided.
+ * `object` function property names filtered from `props`.
  *
  * @private
  * @param {Object} object The object to inspect.

_baseGet.js

@@ -1,4 +1,4 @@
-var baseToPath = require('./_baseToPath'),
+var baseCastPath = require('./_baseCastPath'),
     isKey = require('./_isKey');
 
 /**
@@ -10,7 +10,7 @@ var baseToPath = require('./_baseToPath'),
  * @returns {*} Returns the resolved value.
  */
 function baseGet(object, path) {
-  path = isKey(path, object) ? [path + ''] : baseToPath(path);
+  path = isKey(path, object) ? [path + ''] : baseCastPath(path);
 
   var index = 0,
       length = path.length;

_baseHas.js

@@ -1,5 +1,5 @@
 /** Used for built-in method references. */
-var objectProto = global.Object.prototype;
+var objectProto = Object.prototype;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;

_baseIndexOfWith.js

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

_baseIntersection.js

@@ -5,6 +5,9 @@ var SetCache = require('./_SetCache'),
     baseUnary = require('./_baseUnary'),
     cacheHas = require('./_cacheHas');
 
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeMin = Math.min;
+
 /**
  * The base implementation of methods like `_.intersection`, without support
  * for iteratee shorthands, that accepts an array of arrays to inspect.
@@ -17,9 +20,11 @@ var SetCache = require('./_SetCache'),
  */
 function baseIntersection(arrays, iteratee, comparator) {
   var includes = comparator ? arrayIncludesWith : arrayIncludes,
+      length = arrays[0].length,
       othLength = arrays.length,
       othIndex = othLength,
       caches = Array(othLength),
+      maxLength = Infinity,
       result = [];
 
   while (othIndex--) {
@@ -27,26 +32,32 @@ function baseIntersection(arrays, iteratee, comparator) {
     if (othIndex && iteratee) {
       array = arrayMap(array, baseUnary(iteratee));
     }
-    caches[othIndex] = !comparator && (iteratee || array.length >= 120)
+    maxLength = nativeMin(array.length, maxLength);
+    caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))
       ? new SetCache(othIndex && array)
       : undefined;
   }
   array = arrays[0];
 
   var index = -1,
-      length = array.length,
       seen = caches[0];
 
   outer:
-  while (++index < length) {
+  while (++index < length && result.length < maxLength) {
     var value = array[index],
         computed = iteratee ? iteratee(value) : value;
 
-    if (!(seen ? cacheHas(seen, computed) : includes(result, computed, comparator))) {
+    if (!(seen
-      var othIndex = othLength;
+          ? cacheHas(seen, computed)
+          : includes(result, computed, comparator)
+        )) {
+      othIndex = othLength;
       while (--othIndex) {
         var cache = caches[othIndex];
-        if (!(cache ? cacheHas(cache, computed) : includes(arrays[othIndex], computed, comparator))) {
+        if (!(cache
+              ? cacheHas(cache, computed)
+              : includes(arrays[othIndex], computed, comparator))
+            ) {
           continue outer;
         }
       }

_baseInvoke.js

@@ -1,5 +1,5 @@
 var apply = require('./_apply'),
-    baseToPath = require('./_baseToPath'),
+    baseCastPath = require('./_baseCastPath'),
     isKey = require('./_isKey'),
     last = require('./last'),
     parent = require('./_parent');
@@ -16,7 +16,7 @@ var apply = require('./_apply'),
  */
 function baseInvoke(object, path, args) {
   if (!isKey(path, object)) {
-    path = baseToPath(path);
+    path = baseCastPath(path);
     object = parent(object, path);
     path = last(path);
   }

_baseIsEqualDeep.js

@@ -16,7 +16,7 @@ var argsTag = '[object Arguments]',
     objectTag = '[object Object]';
 
 /** Used for built-in method references. */
-var objectProto = global.Object.prototype;
+var objectProto = Object.prototype;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
@@ -43,33 +43,28 @@ function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
 
   if (!objIsArr) {
     objTag = getTag(object);
-    if (objTag == argsTag) {
+    objTag = objTag == argsTag ? objectTag : objTag;
-      objTag = objectTag;
-    } else if (objTag != objectTag) {
-      objIsArr = isTypedArray(object);
-    }
   }
   if (!othIsArr) {
     othTag = getTag(other);
-    if (othTag == argsTag) {
+    othTag = othTag == argsTag ? objectTag : othTag;
-      othTag = objectTag;
-    } else if (othTag != objectTag) {
-      othIsArr = isTypedArray(other);
-    }
   }
   var objIsObj = objTag == objectTag && !isHostObject(object),
       othIsObj = othTag == objectTag && !isHostObject(other),
       isSameTag = objTag == othTag;
 
-  if (isSameTag && !(objIsArr || objIsObj)) {
+  if (isSameTag && !objIsObj) {
-    return equalByTag(object, other, objTag, equalFunc, customizer, bitmask);
+    stack || (stack = new Stack);
+    return (objIsArr || isTypedArray(object))
+      ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+      : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
   }
-  var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+  if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
-  if (!isPartial) {
     var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
         othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
 
     if (objIsWrapped || othIsWrapped) {
+      stack || (stack = new Stack);
       return equalFunc(objIsWrapped ? object.value() : object, othIsWrapped ? other.value() : other, customizer, bitmask, stack);
     }
   }
@@ -77,7 +72,7 @@ function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
     return false;
   }
   stack || (stack = new Stack);
-  return (objIsArr ? equalArrays : equalObjects)(object, other, equalFunc, customizer, bitmask, stack);
+  return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
 }
 
 module.exports = baseIsEqualDeep;

_baseKeys.js

@@ -6,7 +6,6 @@ var nativeKeys = Object.keys;
  * property of prototypes or treat sparse arrays as dense.
  *
  * @private
- * @type Function
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of property names.
  */

_baseKeysIn.js

@@ -2,7 +2,7 @@ var Reflect = require('./_Reflect'),
     iteratorToArray = require('./_iteratorToArray');
 
 /** Used for built-in method references. */
-var objectProto = global.Object.prototype;
+var objectProto = Object.prototype;
 
 /** Built-in value references. */
 var enumerate = Reflect ? Reflect.enumerate : undefined,

_baseMerge.js

@@ -21,7 +21,10 @@ function baseMerge(object, source, srcIndex, customizer, stack) {
   if (object === source) {
     return;
   }
-  var props = (isArray(source) || isTypedArray(source)) ? undefined : keysIn(source);
+  var props = (isArray(source) || isTypedArray(source))
+    ? undefined
+    : keysIn(source);
+
   arrayEach(props || source, function(srcValue, key) {
     if (props) {
       key = srcValue;
@@ -32,7 +35,10 @@ function baseMerge(object, source, srcIndex, customizer, stack) {
       baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
     }
     else {
-      var newValue = customizer ? customizer(object[key], srcValue, (key + ''), object, source, stack) : undefined;
+      var newValue = customizer
+        ? customizer(object[key], srcValue, (key + ''), object, source, stack)
+        : undefined;
+
       if (newValue === undefined) {
         newValue = srcValue;
       }

_baseMergeDeep.js

@@ -33,21 +33,24 @@ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, sta
     assignMergeValue(object, key, stacked);
     return;
   }
-  var newValue = customizer ? customizer(objValue, srcValue, (key + ''), object, source, stack) : undefined,
+  var newValue = customizer
-      isCommon = newValue === undefined;
+    ? customizer(objValue, srcValue, (key + ''), object, source, stack)
+    : undefined;
+
+  var isCommon = newValue === undefined;
 
   if (isCommon) {
     newValue = srcValue;
     if (isArray(srcValue) || isTypedArray(srcValue)) {
       if (isArray(objValue)) {
-        newValue = srcIndex ? copyArray(objValue) : objValue;
+        newValue = objValue;
       }
       else if (isArrayLikeObject(objValue)) {
         newValue = copyArray(objValue);
       }
       else {
         isCommon = false;
-        newValue = baseClone(srcValue);
+        newValue = baseClone(srcValue, !customizer);
       }
     }
     else if (isPlainObject(srcValue) || isArguments(srcValue)) {
@@ -56,10 +59,10 @@ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, sta
       }
       else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
         isCommon = false;
-        newValue = baseClone(srcValue);
+        newValue = baseClone(srcValue, !customizer);
       }
       else {
-        newValue = srcIndex ? baseClone(objValue) : objValue;
+        newValue = objValue;
       }
     }
     else {
@@ -72,6 +75,7 @@ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, sta
     // Recursively merge objects and arrays (susceptible to call stack limits).
     mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
   }
+  stack['delete'](srcValue);
   assignMergeValue(object, key, newValue);
 }
 

_baseOrderBy.js

@@ -14,12 +14,8 @@ var arrayMap = require('./_arrayMap'),
  * @returns {Array} Returns the new sorted array.
  */
 function baseOrderBy(collection, iteratees, orders) {
-  var index = -1,
+  var index = -1;
-      toIteratee = baseIteratee;
+  iteratees = arrayMap(iteratees.length ? iteratees : Array(1), baseIteratee);
-
-  iteratees = arrayMap(iteratees.length ? iteratees : Array(1), function(iteratee) {
-    return toIteratee(iteratee);
-  });
 
   var result = baseMap(collection, function(value, key, collection) {
     var criteria = arrayMap(iteratees, function(iteratee) {

_basePullAll.js

@@ -1,15 +1,47 @@
-var basePullAllBy = require('./_basePullAllBy');
+var arrayMap = require('./_arrayMap'),
+    baseIndexOf = require('./_baseIndexOf'),
+    baseIndexOfWith = require('./_baseIndexOfWith'),
+    baseUnary = require('./_baseUnary');
+
+/** Used for built-in method references. */
+var arrayProto = Array.prototype;
+
+/** Built-in value references. */
+var splice = arrayProto.splice;
 
 /**
- * The base implementation of `_.pullAll`.
+ * The base implementation of `_.pullAllBy` without support for iteratee
+ * shorthands.
  *
  * @private
  * @param {Array} array The array to modify.
  * @param {Array} values The values to remove.
+ * @param {Function} [iteratee] The iteratee invoked per element.
+ * @param {Function} [comparator] The comparator invoked per element.
  * @returns {Array} Returns `array`.
  */
-function basePullAll(array, values) {
+function basePullAll(array, values, iteratee, comparator) {
-  return basePullAllBy(array, values);
+  var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
+      index = -1,
+      length = values.length,
+      seen = array;
+
+  if (iteratee) {
+    seen = arrayMap(array, baseUnary(iteratee));
+  }
+  while (++index < length) {
+    var fromIndex = 0,
+        value = values[index],
+        computed = iteratee ? iteratee(value) : value;
+
+    while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
+      if (seen !== array) {
+        splice.call(seen, fromIndex, 1);
+      }
+      splice.call(array, fromIndex, 1);
+    }
+  }
+  return array;
 }
 
 module.exports = basePullAll;

_basePullAllBy.js

@@ -1,43 +0,0 @@
-var arrayMap = require('./_arrayMap'),
-    baseIndexOf = require('./_baseIndexOf');
-
-/** Used for built-in method references. */
-var arrayProto = global.Array.prototype;
-
-/** Built-in value references. */
-var splice = arrayProto.splice;
-
-/**
- * The base implementation of `_.pullAllBy` without support for iteratee
- * shorthands.
- *
- * @private
- * @param {Array} array The array to modify.
- * @param {Array} values The values to remove.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @returns {Array} Returns `array`.
- */
-function basePullAllBy(array, values, iteratee) {
-  var index = -1,
-      length = values.length,
-      seen = array;
-
-  if (iteratee) {
-    seen = arrayMap(array, function(value) { return iteratee(value); });
-  }
-  while (++index < length) {
-    var fromIndex = 0,
-        value = values[index],
-        computed = iteratee ? iteratee(value) : value;
-
-    while ((fromIndex = baseIndexOf(seen, computed, fromIndex)) > -1) {
-      if (seen !== array) {
-        splice.call(seen, fromIndex, 1);
-      }
-      splice.call(array, fromIndex, 1);
-    }
-  }
-  return array;
-}
-
-module.exports = basePullAllBy;

_basePullAt.js

@@ -1,11 +1,11 @@
-var baseToPath = require('./_baseToPath'),
+var baseCastPath = require('./_baseCastPath'),
     isIndex = require('./_isIndex'),
     isKey = require('./_isKey'),
     last = require('./last'),
     parent = require('./_parent');
 
 /** Used for built-in method references. */
-var arrayProto = global.Array.prototype;
+var arrayProto = Array.prototype;
 
 /** Built-in value references. */
 var splice = arrayProto.splice;
@@ -31,7 +31,7 @@ function basePullAt(array, indexes) {
         splice.call(array, index, 1);
       }
       else if (!isKey(index, array)) {
-        var path = baseToPath(index),
+        var path = baseCastPath(index),
             object = parent(array, path);
 
         if (object != null) {

_baseSet.js

@@ -1,5 +1,5 @@
 var assignValue = require('./_assignValue'),
-    baseToPath = require('./_baseToPath'),
+    baseCastPath = require('./_baseCastPath'),
     isIndex = require('./_isIndex'),
     isKey = require('./_isKey'),
     isObject = require('./isObject');
@@ -15,7 +15,7 @@ var assignValue = require('./_assignValue'),
  * @returns {Object} Returns `object`.
  */
 function baseSet(object, path, value, customizer) {
-  path = isKey(path, object) ? [path + ''] : baseToPath(path);
+  path = isKey(path, object) ? [path + ''] : baseCastPath(path);
 
   var index = -1,
       length = path.length,
@@ -30,7 +30,9 @@ function baseSet(object, path, value, customizer) {
         var objValue = nested[key];
         newValue = customizer ? customizer(objValue, key, nested) : undefined;
         if (newValue === undefined) {
-          newValue = objValue == null ? (isIndex(path[index + 1]) ? [] : {}) : objValue;
+          newValue = objValue == null
+            ? (isIndex(path[index + 1]) ? [] : {})
+            : objValue;
         }
       }
       assignValue(nested, key, newValue);

_baseSortBy.js

@@ -1,7 +1,7 @@
 /**
- * The base implementation of `_.sortBy` which uses `comparer` to define
+ * The base implementation of `_.sortBy` which uses `comparer` to define the
- * the sort order of `array` and replaces criteria objects with their
+ * sort order of `array` and replaces criteria objects with their corresponding
- * corresponding values.
+ * values.
  *
  * @private
  * @param {Array} array The array to sort.

_baseSortedUniqBy.js

@@ -15,7 +15,7 @@ function baseSortedUniqBy(array, iteratee) {
       value = array[0],
       computed = iteratee ? iteratee(value) : value,
       seen = computed,
-      resIndex = 0,
+      resIndex = 1,
       result = [value];
 
   while (++index < length) {
@@ -24,7 +24,7 @@ function baseSortedUniqBy(array, iteratee) {
 
     if (!eq(computed, seen)) {
       seen = computed;
-      result[++resIndex] = value;
+      result[resIndex++] = value;
     }
   }
   return result;

_baseSum.js

@@ -17,7 +17,7 @@ function baseSum(array, iteratee) {
       result = result === undefined ? current : (result + current);
     }
   }
-  return length ? result : 0;
+  return result;
 }
 
 module.exports = baseSum;

_baseToPath.js

@@ -1,16 +0,0 @@
-var isArray = require('./isArray'),
-    stringToPath = require('./_stringToPath');
-
-/**
- * The base implementation of `_.toPath` which only converts `value` to a
- * path if it's not one.
- *
- * @private
- * @param {*} value The value to process.
- * @returns {Array} Returns the property path array.
- */
-function baseToPath(value) {
-  return isArray(value) ? value : stringToPath(value);
-}
-
-module.exports = baseToPath;

_baseUnset.js

@@ -1,4 +1,4 @@
-var baseToPath = require('./_baseToPath'),
+var baseCastPath = require('./_baseCastPath'),
     has = require('./has'),
     isKey = require('./_isKey'),
     last = require('./last'),
@@ -13,7 +13,7 @@ var baseToPath = require('./_baseToPath'),
  * @returns {boolean} Returns `true` if the property is deleted, else `false`.
  */
 function baseUnset(object, path) {
-  path = isKey(path, object) ? [path + ''] : baseToPath(path);
+  path = isKey(path, object) ? [path + ''] : baseCastPath(path);
   object = parent(object, path);
   var key = last(path);
   return (object != null && has(object, key)) ? delete object[key] : true;

_baseUpdate.js

@@ -0,0 +1,18 @@
+var baseGet = require('./_baseGet'),
+    baseSet = require('./_baseSet');
+
+/**
+ * The base implementation of `_.update`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @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.
+ * @returns {Object} Returns `object`.
+ */
+function baseUpdate(object, path, updater, customizer) {
+  return baseSet(object, path, updater(baseGet(object, path)), customizer);
+}
+
+module.exports = baseUpdate;

_checkGlobal.js

@@ -0,0 +1,12 @@
+/**
+ * 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;
+}
+
+module.exports = checkGlobal;

_cloneArrayBuffer.js

@@ -0,0 +1,16 @@
+var Uint8Array = require('./_Uint8Array');
+
+/**
+ * Creates a clone of `arrayBuffer`.
+ *
+ * @private
+ * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
+ * @returns {ArrayBuffer} Returns the cloned array buffer.
+ */
+function cloneArrayBuffer(arrayBuffer) {
+  var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
+  new Uint8Array(result).set(new Uint8Array(arrayBuffer));
+  return result;
+}
+
+module.exports = cloneArrayBuffer;

_cloneBuffer.js

@@ -1,18 +1,17 @@
-var Uint8Array = require('./_Uint8Array');
-
 /**
- * Creates a clone of `buffer`.
+ * Creates a clone of  `buffer`.
  *
  * @private
- * @param {ArrayBuffer} buffer The array buffer to clone.
+ * @param {Buffer} buffer The buffer to clone.
- * @returns {ArrayBuffer} Returns the cloned array buffer.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Buffer} Returns the cloned buffer.
  */
-function cloneBuffer(buffer) {
+function cloneBuffer(buffer, isDeep) {
-  var Ctor = buffer.constructor,
+  if (isDeep) {
-      result = new Ctor(buffer.byteLength),
+    return buffer.slice();
-      view = new Uint8Array(result);
+  }
-
+  var result = new buffer.constructor(buffer.length);
-  view.set(new Uint8Array(buffer));
+  buffer.copy(result);
   return result;
 }
 

_cloneMap.js

@@ -10,8 +10,7 @@ var addMapEntry = require('./_addMapEntry'),
  * @returns {Object} Returns the cloned map.
  */
 function cloneMap(map) {
-  var Ctor = map.constructor;
+  return arrayReduce(mapToArray(map), addMapEntry, new map.constructor);
-  return arrayReduce(mapToArray(map), addMapEntry, new Ctor);
 }
 
 module.exports = cloneMap;

_cloneRegExp.js

@@ -9,9 +9,7 @@ var reFlags = /\w*$/;
  * @returns {Object} Returns the cloned regexp.
  */
 function cloneRegExp(regexp) {
-  var Ctor = regexp.constructor,
+  var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
-      result = new Ctor(regexp.source, reFlags.exec(regexp));
-
   result.lastIndex = regexp.lastIndex;
   return result;
 }

_cloneSet.js

@@ -10,8 +10,7 @@ var addSetEntry = require('./_addSetEntry'),
  * @returns {Object} Returns the cloned set.
  */
 function cloneSet(set) {
-  var Ctor = set.constructor;
+  return arrayReduce(setToArray(set), addSetEntry, new set.constructor);
-  return arrayReduce(setToArray(set), addSetEntry, new Ctor);
 }
 
 module.exports = cloneSet;

_cloneSymbol.js

@@ -2,7 +2,7 @@ var Symbol = require('./_Symbol');
 
 /** Used to convert symbols to primitives and strings. */
 var symbolProto = Symbol ? Symbol.prototype : undefined,
-    symbolValueOf = Symbol ? symbolProto.valueOf : undefined;
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;
 
 /**
  * Creates a clone of the `symbol` object.
@@ -12,7 +12,7 @@ var symbolProto = Symbol ? Symbol.prototype : undefined,
  * @returns {Object} Returns the cloned symbol object.
  */
 function cloneSymbol(symbol) {
-  return Symbol ? Object(symbolValueOf.call(symbol)) : {};
+  return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
 }
 
 module.exports = cloneSymbol;

_cloneTypedArray.js

@@ -1,4 +1,4 @@
-var cloneBuffer = require('./_cloneBuffer');
+var cloneArrayBuffer = require('./_cloneArrayBuffer');
 
 /**
  * Creates a clone of `typedArray`.
@@ -9,10 +9,8 @@ var cloneBuffer = require('./_cloneBuffer');
  * @returns {Object} Returns the cloned typed array.
  */
 function cloneTypedArray(typedArray, isDeep) {
-  var buffer = typedArray.buffer,
+  var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
-      Ctor = typedArray.constructor;
+  return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
-
-  return new Ctor(isDeep ? cloneBuffer(buffer) : buffer, typedArray.byteOffset, typedArray.length);
 }
 
 module.exports = cloneTypedArray;

_composeArgs.js

@@ -9,23 +9,28 @@ var nativeMax = Math.max;
  * @param {Array|Object} args The provided arguments.
  * @param {Array} partials The arguments to prepend to those provided.
  * @param {Array} holders The `partials` placeholder indexes.
+ * @params {boolean} [isCurried] Specify composing for a curried function.
  * @returns {Array} Returns the new array of composed arguments.
  */
-function composeArgs(args, partials, holders) {
+function composeArgs(args, partials, holders, isCurried) {
-  var holdersLength = holders.length,
+  var argsIndex = -1,
-      argsIndex = -1,
+      argsLength = args.length,
-      argsLength = nativeMax(args.length - holdersLength, 0),
+      holdersLength = holders.length,
       leftIndex = -1,
       leftLength = partials.length,
-      result = Array(leftLength + argsLength);
+      rangeLength = nativeMax(argsLength - holdersLength, 0),
+      result = Array(leftLength + rangeLength),
+      isUncurried = !isCurried;
 
   while (++leftIndex < leftLength) {
     result[leftIndex] = partials[leftIndex];
   }
   while (++argsIndex < holdersLength) {
-    result[holders[argsIndex]] = args[argsIndex];
+    if (isUncurried || argsIndex < argsLength) {
+      result[holders[argsIndex]] = args[argsIndex];
+    }
   }
-  while (argsLength--) {
+  while (rangeLength--) {
     result[leftIndex++] = args[argsIndex++];
   }
   return result;

_composeArgsRight.js

@@ -9,18 +9,21 @@ var nativeMax = Math.max;
  * @param {Array|Object} args The provided arguments.
  * @param {Array} partials The arguments to append to those provided.
  * @param {Array} holders The `partials` placeholder indexes.
+ * @params {boolean} [isCurried] Specify composing for a curried function.
  * @returns {Array} Returns the new array of composed arguments.
  */
-function composeArgsRight(args, partials, holders) {
+function composeArgsRight(args, partials, holders, isCurried) {
-  var holdersIndex = -1,
+  var argsIndex = -1,
+      argsLength = args.length,
+      holdersIndex = -1,
       holdersLength = holders.length,
-      argsIndex = -1,
-      argsLength = nativeMax(args.length - holdersLength, 0),
       rightIndex = -1,
       rightLength = partials.length,
-      result = Array(argsLength + rightLength);
+      rangeLength = nativeMax(argsLength - holdersLength, 0),
+      result = Array(rangeLength + rightLength),
+      isUncurried = !isCurried;
 
-  while (++argsIndex < argsLength) {
+  while (++argsIndex < rangeLength) {
     result[argsIndex] = args[argsIndex];
   }
   var offset = argsIndex;
@@ -28,7 +31,9 @@ function composeArgsRight(args, partials, holders) {
     result[offset + rightIndex] = partials[rightIndex];
   }
   while (++holdersIndex < holdersLength) {
-    result[offset + holders[holdersIndex]] = args[argsIndex++];
+    if (isUncurried || argsIndex < argsLength) {
+      result[offset + holders[holdersIndex]] = args[argsIndex++];
+    }
   }
   return result;
 }

_copyObjectWith.js

@@ -18,8 +18,11 @@ function copyObjectWith(source, props, object, customizer) {
       length = props.length;
 
   while (++index < length) {
-    var key = props[index],
+    var key = props[index];
-        newValue = customizer ? customizer(object[key], source[key], key, object, source) : source[key];
+
+    var newValue = customizer
+      ? customizer(object[key], source[key], key, object, source)
+      : source[key];
 
     assignValue(object, key, newValue);
   }

_countHolders.js

@@ -0,0 +1,21 @@
+/**
+ * Gets the number of `placeholder` occurrences in `array`.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {*} placeholder The placeholder to search for.
+ * @returns {number} Returns the placeholder count.
+ */
+function countHolders(array, placeholder) {
+  var length = array.length,
+      result = 0;
+
+  while (length--) {
+    if (array[length] === placeholder) {
+      result++;
+    }
+  }
+  return result;
+}
+
+module.exports = countHolders;

_createAssigner.js

@@ -15,7 +15,10 @@ function createAssigner(assigner) {
         customizer = length > 1 ? sources[length - 1] : undefined,
         guard = length > 2 ? sources[2] : undefined;
 
-    customizer = typeof customizer == 'function' ? (length--, customizer) : undefined;
+    customizer = typeof customizer == 'function'
+      ? (length--, customizer)
+      : undefined;
+
     if (guard && isIterateeCall(sources[0], sources[1], guard)) {
       customizer = length < 3 ? undefined : customizer;
       length = 1;

_createBaseWrapper.js

@@ -1,4 +1,5 @@
-var createCtorWrapper = require('./_createCtorWrapper');
+var createCtorWrapper = require('./_createCtorWrapper'),
+    root = require('./_root');
 
 /** Used to compose bitmasks for wrapper metadata. */
 var BIND_FLAG = 1;
@@ -18,7 +19,7 @@ function createBaseWrapper(func, bitmask, thisArg) {
       Ctor = createCtorWrapper(func);
 
   function wrapper() {
-    var fn = (this && this !== global && this instanceof wrapper) ? Ctor : func;
+    var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
     return fn.apply(isBind ? thisArg : this, arguments);
   }
   return wrapper;

_createCaseFirst.js

@@ -24,8 +24,11 @@ function createCaseFirst(methodName) {
   return function(string) {
     string = toString(string);
 
-    var strSymbols = reHasComplexSymbol.test(string) ? stringToArray(string) : undefined,
+    var strSymbols = reHasComplexSymbol.test(string)
-        chr = strSymbols ? strSymbols[0] : string.charAt(0),
+      ? stringToArray(string)
+      : undefined;
+
+    var chr = strSymbols ? strSymbols[0] : string.charAt(0),
         trailing = strSymbols ? strSymbols.slice(1).join('') : string.slice(1);
 
     return chr[methodName]() + trailing;

_createCurryWrapper.js

@@ -2,7 +2,9 @@ var apply = require('./_apply'),
     createCtorWrapper = require('./_createCtorWrapper'),
     createHybridWrapper = require('./_createHybridWrapper'),
     createRecurryWrapper = require('./_createRecurryWrapper'),
-    replaceHolders = require('./_replaceHolders');
+    getPlaceholder = require('./_getPlaceholder'),
+    replaceHolders = require('./_replaceHolders'),
+    root = require('./_root');
 
 /**
  * Creates a function that wraps `func` to enable currying.
@@ -18,10 +20,9 @@ function createCurryWrapper(func, bitmask, arity) {
 
   function wrapper() {
     var length = arguments.length,
-        index = length,
         args = Array(length),
-        fn = (this && this !== global && this instanceof wrapper) ? Ctor : func,
+        index = length,
-        placeholder = wrapper.placeholder;
+        placeholder = getPlaceholder(wrapper);
 
     while (index--) {
       args[index] = arguments[index];
@@ -31,9 +32,13 @@ function createCurryWrapper(func, bitmask, arity) {
       : replaceHolders(args, placeholder);
 
     length -= holders.length;
-    return length < arity
+    if (length < arity) {
-      ? createRecurryWrapper(func, bitmask, createHybridWrapper, placeholder, undefined, args, holders, undefined, undefined, arity - length)
+      return createRecurryWrapper(
-      : apply(fn, this, args);
+        func, bitmask, createHybridWrapper, wrapper.placeholder, undefined,
+        args, holders, undefined, undefined, arity - length);
+    }
+    var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
+    return apply(fn, this, args);
   }
   return wrapper;
 }

_createFlow.js

@@ -6,18 +6,18 @@ var LodashWrapper = require('./_LodashWrapper'),
     isLaziable = require('./_isLaziable'),
     rest = require('./rest');
 
-/** Used to compose bitmasks for wrapper metadata. */
-var CURRY_FLAG = 8,
-    PARTIAL_FLAG = 32,
-    ARY_FLAG = 128,
-    REARG_FLAG = 256;
-
 /** Used as the size to enable large array optimizations. */
 var LARGE_ARRAY_SIZE = 200;
 
 /** Used as the `TypeError` message for "Functions" methods. */
 var FUNC_ERROR_TEXT = 'Expected a function';
 
+/** Used to compose bitmasks for wrapper metadata. */
+var CURRY_FLAG = 8,
+    PARTIAL_FLAG = 32,
+    ARY_FLAG = 128,
+    REARG_FLAG = 256;
+
 /**
  * Creates a `_.flow` or `_.flowRight` function.
  *
@@ -27,7 +27,7 @@ var FUNC_ERROR_TEXT = 'Expected a function';
  */
 function createFlow(fromRight) {
   return rest(function(funcs) {
-    funcs = baseFlatten(funcs);
+    funcs = baseFlatten(funcs, 1);
 
     var length = funcs.length,
         index = length,
@@ -52,7 +52,10 @@ function createFlow(fromRight) {
       var funcName = getFuncName(func),
           data = funcName == 'wrapper' ? getData(func) : undefined;
 
-      if (data && isLaziable(data[0]) && data[1] == (ARY_FLAG | CURRY_FLAG | PARTIAL_FLAG | REARG_FLAG) && !data[4].length && data[9] == 1) {
+      if (data && isLaziable(data[0]) &&
+            data[1] == (ARY_FLAG | CURRY_FLAG | PARTIAL_FLAG | REARG_FLAG) &&
+            !data[4].length && data[9] == 1
+          ) {
         wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
       } else {
         wrapper = (func.length == 1 && isLaziable(func)) ? wrapper[funcName]() : wrapper.thru(func);
@@ -62,7 +65,8 @@ function createFlow(fromRight) {
       var args = arguments,
           value = args[0];
 
-      if (wrapper && args.length == 1 && isArray(value) && value.length >= LARGE_ARRAY_SIZE) {
+      if (wrapper && args.length == 1 &&
+          isArray(value) && value.length >= LARGE_ARRAY_SIZE) {
         return wrapper.plant(value).value();
       }
       var index = 0,

_createHybridWrapper.js

@@ -1,9 +1,12 @@
 var composeArgs = require('./_composeArgs'),
     composeArgsRight = require('./_composeArgsRight'),
+    countHolders = require('./_countHolders'),
     createCtorWrapper = require('./_createCtorWrapper'),
     createRecurryWrapper = require('./_createRecurryWrapper'),
+    getPlaceholder = require('./_getPlaceholder'),
     reorder = require('./_reorder'),
-    replaceHolders = require('./_replaceHolders');
+    replaceHolders = require('./_replaceHolders'),
+    root = require('./_root');
 
 /** Used to compose bitmasks for wrapper metadata. */
 var BIND_FLAG = 1,
@@ -34,8 +37,7 @@ function createHybridWrapper(func, bitmask, thisArg, partials, holders, partials
   var isAry = bitmask & ARY_FLAG,
       isBind = bitmask & BIND_FLAG,
       isBindKey = bitmask & BIND_KEY_FLAG,
-      isCurry = bitmask & CURRY_FLAG,
+      isCurried = bitmask & (CURRY_FLAG | CURRY_RIGHT_FLAG),
-      isCurryRight = bitmask & CURRY_RIGHT_FLAG,
       isFlip = bitmask & FLIP_FLAG,
       Ctor = isBindKey ? undefined : createCtorWrapper(func);
 
@@ -47,33 +49,37 @@ function createHybridWrapper(func, bitmask, thisArg, partials, holders, partials
     while (index--) {
       args[index] = arguments[index];
     }
+    if (isCurried) {
+      var placeholder = getPlaceholder(wrapper),
+          holdersCount = countHolders(args, placeholder);
+    }
     if (partials) {
-      args = composeArgs(args, partials, holders);
+      args = composeArgs(args, partials, holders, isCurried);
     }
     if (partialsRight) {
-      args = composeArgsRight(args, partialsRight, holdersRight);
+      args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
     }
-    if (isCurry || isCurryRight) {
+    length -= holdersCount;
-      var placeholder = wrapper.placeholder,
+    if (isCurried && length < arity) {
-          argsHolders = replaceHolders(args, placeholder);
+      var newHolders = replaceHolders(args, placeholder);
-
+      return createRecurryWrapper(
-      length -= argsHolders.length;
+        func, bitmask, createHybridWrapper, wrapper.placeholder, thisArg,
-      if (length < arity) {
+        args, newHolders, argPos, ary, arity - length
-        return createRecurryWrapper(func, bitmask, createHybridWrapper, placeholder, thisArg, args, argsHolders, argPos, ary, arity - length);
+      );
-      }
     }
     var thisBinding = isBind ? thisArg : this,
         fn = isBindKey ? thisBinding[func] : func;
 
+    length = args.length;
     if (argPos) {
       args = reorder(args, argPos);
-    } else if (isFlip && args.length > 1) {
+    } else if (isFlip && length > 1) {
       args.reverse();
     }
-    if (isAry && ary < args.length) {
+    if (isAry && ary < length) {
       args.length = ary;
     }
-    if (this && this !== global && this instanceof wrapper) {
+    if (this && this !== root && this instanceof wrapper) {
       fn = Ctor || createCtorWrapper(fn);
     }
     return fn.apply(thisBinding, args);

_createOver.js

@@ -13,7 +13,7 @@ var apply = require('./_apply'),
  */
 function createOver(arrayFunc) {
   return rest(function(iteratees) {
-    iteratees = arrayMap(baseFlatten(iteratees), baseIteratee);
+    iteratees = arrayMap(baseFlatten(iteratees, 1), baseIteratee);
     return rest(function(args) {
       var thisArg = this;
       return arrayFunc(iteratees, function(iteratee) {

_createPartialWrapper.js

@@ -1,5 +1,6 @@
 var apply = require('./_apply'),
-    createCtorWrapper = require('./_createCtorWrapper');
+    createCtorWrapper = require('./_createCtorWrapper'),
+    root = require('./_root');
 
 /** Used to compose bitmasks for wrapper metadata. */
 var BIND_FLAG = 1;
@@ -26,7 +27,7 @@ function createPartialWrapper(func, bitmask, thisArg, partials) {
         leftIndex = -1,
         leftLength = partials.length,
         args = Array(leftLength + argsLength),
-        fn = (this && this !== global && this instanceof wrapper) ? Ctor : func;
+        fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
 
     while (++leftIndex < leftLength) {
       args[leftIndex] = partials[leftIndex];

_createRecurryWrapper.js

@@ -17,7 +17,7 @@ var BIND_FLAG = 1,
  * @param {Function} func The function to wrap.
  * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details.
  * @param {Function} wrapFunc The function to create the `func` wrapper.
- * @param {*} placeholder The placeholder to replace.
+ * @param {*} placeholder The placeholder value.
  * @param {*} [thisArg] The `this` binding of `func`.
  * @param {Array} [partials] The arguments to prepend to those provided to the new function.
  * @param {Array} [holders] The `partials` placeholder indexes.
@@ -29,7 +29,7 @@ var BIND_FLAG = 1,
 function createRecurryWrapper(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
   var isCurry = bitmask & CURRY_FLAG,
       newArgPos = argPos ? copyArray(argPos) : undefined,
-      newsHolders = isCurry ? holders : undefined,
+      newHolders = isCurry ? holders : undefined,
       newHoldersRight = isCurry ? undefined : holders,
       newPartials = isCurry ? partials : undefined,
       newPartialsRight = isCurry ? undefined : partials;
@@ -40,9 +40,12 @@ function createRecurryWrapper(func, bitmask, wrapFunc, placeholder, thisArg, par
   if (!(bitmask & CURRY_BOUND_FLAG)) {
     bitmask &= ~(BIND_FLAG | BIND_KEY_FLAG);
   }
-  var newData = [func, bitmask, thisArg, newPartials, newsHolders, newPartialsRight, newHoldersRight, newArgPos, ary, arity],
+  var newData = [
-      result = wrapFunc.apply(undefined, newData);
+    func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
+    newHoldersRight, newArgPos, ary, arity
+  ];
 
+  var result = wrapFunc.apply(undefined, newData);
   if (isLaziable(func)) {
     setData(result, newData);
   }

_createWrapper.js

@@ -8,6 +8,9 @@ var baseSetData = require('./_baseSetData'),
     setData = require('./_setData'),
     toInteger = require('./toInteger');
 
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
 /** Used to compose bitmasks for wrapper metadata. */
 var BIND_FLAG = 1,
     BIND_KEY_FLAG = 2,
@@ -16,9 +19,6 @@ var BIND_FLAG = 1,
     PARTIAL_FLAG = 32,
     PARTIAL_RIGHT_FLAG = 64;
 
-/** Used as the `TypeError` message for "Functions" methods. */
-var FUNC_ERROR_TEXT = 'Expected a function';
-
 /* Built-in method references for those with the same name as other `lodash` methods. */
 var nativeMax = Math.max;
 
@@ -67,8 +67,12 @@ function createWrapper(func, bitmask, thisArg, partials, holders, argPos, ary, a
 
     partials = holders = undefined;
   }
-  var data = isBindKey ? undefined : getData(func),
+  var data = isBindKey ? undefined : getData(func);
-      newData = [func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity];
+
+  var newData = [
+    func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,
+    argPos, ary, arity
+  ];
 
   if (data) {
     mergeData(newData, data);

_equalArrays.js

@@ -12,9 +12,9 @@ var UNORDERED_COMPARE_FLAG = 1,
  * @param {Array} array The array to compare.
  * @param {Array} other The other array to compare.
  * @param {Function} equalFunc The function to determine equivalents of values.
- * @param {Function} [customizer] The function to customize comparisons.
+ * @param {Function} customizer The function to customize comparisons.
- * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual` for more details.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual` for more details.
- * @param {Object} [stack] Tracks traversed `array` and `other` objects.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
  * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
  */
 function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {

_equalByTag.js

@@ -1,5 +1,6 @@
 var Symbol = require('./_Symbol'),
     Uint8Array = require('./_Uint8Array'),
+    equalArrays = require('./_equalArrays'),
     mapToArray = require('./_mapToArray'),
     setToArray = require('./_setToArray');
 
@@ -22,7 +23,7 @@ var arrayBufferTag = '[object ArrayBuffer]';
 
 /** Used to convert symbols to primitives and strings. */
 var symbolProto = Symbol ? Symbol.prototype : undefined,
-    symbolValueOf = Symbol ? symbolProto.valueOf : undefined;
+    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;
 
 /**
  * A specialized version of `baseIsEqualDeep` for comparing objects of
@@ -36,11 +37,12 @@ var symbolProto = Symbol ? Symbol.prototype : undefined,
  * @param {Object} other The other object to compare.
  * @param {string} tag The `toStringTag` of the objects to compare.
  * @param {Function} equalFunc The function to determine equivalents of values.
- * @param {Function} [customizer] The function to customize comparisons.
+ * @param {Function} customizer The function to customize comparisons.
- * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual` for more details.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual` for more details.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
  * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
  */
-function equalByTag(object, other, tag, equalFunc, customizer, bitmask) {
+function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
   switch (tag) {
     case arrayBufferTag:
       if ((object.byteLength != other.byteLength) ||
@@ -75,12 +77,21 @@ function equalByTag(object, other, tag, equalFunc, customizer, bitmask) {
       var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
       convert || (convert = setToArray);
 
+      if (object.size != other.size && !isPartial) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked) {
+        return stacked == other;
+      }
       // Recursively compare objects (susceptible to call stack limits).
-      return (isPartial || object.size == other.size) &&
+      return equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask | UNORDERED_COMPARE_FLAG, stack.set(object, other));
-        equalFunc(convert(object), convert(other), customizer, bitmask | UNORDERED_COMPARE_FLAG);
 
     case symbolTag:
-      return !!Symbol && (symbolValueOf.call(object) == symbolValueOf.call(other));
+      if (symbolValueOf) {
+        return symbolValueOf.call(object) == symbolValueOf.call(other);
+      }
   }
   return false;
 }

_equalObjects.js

@@ -12,9 +12,9 @@ var PARTIAL_COMPARE_FLAG = 2;
  * @param {Object} object The object to compare.
  * @param {Object} other The other object to compare.
  * @param {Function} equalFunc The function to determine equivalents of values.
- * @param {Function} [customizer] The function to customize comparisons.
+ * @param {Function} customizer The function to customize comparisons.
- * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual` for more details.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual` for more details.
- * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
  * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
  */
 function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {

_getFuncName.js

@@ -1,7 +1,7 @@
 var realNames = require('./_realNames');
 
 /** Used for built-in method references. */
-var objectProto = global.Object.prototype;
+var objectProto = Object.prototype;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;

_getNative.js

@@ -9,7 +9,7 @@ var isNative = require('./isNative');
  * @returns {*} Returns the function if it's native, else `undefined`.
  */
 function getNative(object, key) {
-  var value = object == null ? undefined : object[key];
+  var value = object[key];
   return isNative(value) ? value : undefined;
 }
 

_getPlaceholder.js

@@ -0,0 +1,13 @@
+/**
+ * Gets the argument placeholder value for `func`.
+ *
+ * @private
+ * @param {Function} func The function to inspect.
+ * @returns {*} Returns the placeholder value.
+ */
+function getPlaceholder(func) {
+  var object = func;
+  return object.placeholder;
+}
+
+module.exports = getPlaceholder;

_getTag.js

@@ -1,16 +1,18 @@
 var Map = require('./_Map'),
-    Set = require('./_Set');
+    Set = require('./_Set'),
+    WeakMap = require('./_WeakMap');
 
 /** `Object#toString` result references. */
 var mapTag = '[object Map]',
     objectTag = '[object Object]',
-    setTag = '[object Set]';
+    setTag = '[object Set]',
+    weakMapTag = '[object WeakMap]';
 
 /** Used for built-in method references. */
-var objectProto = global.Object.prototype;
+var objectProto = Object.prototype;
 
 /** Used to resolve the decompiled source of functions. */
-var funcToString = global.Function.prototype.toString;
+var funcToString = Function.prototype.toString;
 
 /**
  * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
@@ -18,9 +20,10 @@ var funcToString = global.Function.prototype.toString;
  */
 var objectToString = objectProto.toString;
 
-/** Used to detect maps and sets. */
+/** Used to detect maps, sets, and weakmaps. */
 var mapCtorString = Map ? funcToString.call(Map) : '',
-    setCtorString = Set ? funcToString.call(Set) : '';
+    setCtorString = Set ? funcToString.call(Set) : '',
+    weakMapCtorString = WeakMap ? funcToString.call(WeakMap) : '';
 
 /**
  * Gets the `toStringTag` of `value`.
@@ -33,19 +36,20 @@ function getTag(value) {
   return objectToString.call(value);
 }
 
-// Fallback for IE 11 providing `toStringTag` values for maps and sets.
+// Fallback for IE 11 providing `toStringTag` values for maps, sets, and weakmaps.
-if ((Map && getTag(new Map) != mapTag) || (Set && getTag(new Set) != setTag)) {
+if ((Map && getTag(new Map) != mapTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
   getTag = function(value) {
     var result = objectToString.call(value),
         Ctor = result == objectTag ? value.constructor : null,
         ctorString = typeof Ctor == 'function' ? funcToString.call(Ctor) : '';
 
     if (ctorString) {
-      if (ctorString == mapCtorString) {
+      switch (ctorString) {
-        return mapTag;
+        case mapCtorString: return mapTag;
-      }
+        case setCtorString: return setTag;
-      if (ctorString == setCtorString) {
+        case weakMapCtorString: return weakMapTag;
-        return setTag;
       }
     }
     return result;

_hasPath.js

@@ -1,4 +1,4 @@
-var baseToPath = require('./_baseToPath'),
+var baseCastPath = require('./_baseCastPath'),
     isArguments = require('./isArguments'),
     isArray = require('./isArray'),
     isIndex = require('./_isIndex'),
@@ -23,7 +23,7 @@ function hasPath(object, path, hasFunc) {
   }
   var result = hasFunc(object, path);
   if (!result && !isKey(path)) {
-    path = baseToPath(path);
+    path = baseCastPath(path);
     object = parent(object, path);
     if (object != null) {
       path = last(path);

_hashGet.js

@@ -4,7 +4,7 @@ var nativeCreate = require('./_nativeCreate');
 var HASH_UNDEFINED = '__lodash_hash_undefined__';
 
 /** Used for built-in method references. */
-var objectProto = global.Object.prototype;
+var objectProto = Object.prototype;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;

_hashHas.js

@@ -1,7 +1,7 @@
 var nativeCreate = require('./_nativeCreate');
 
 /** Used for built-in method references. */
-var objectProto = global.Object.prototype;
+var objectProto = Object.prototype;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;

_initCloneArray.js

@@ -1,5 +1,5 @@
 /** Used for built-in method references. */
-var objectProto = global.Object.prototype;
+var objectProto = Object.prototype;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;

_initCloneByTag.js

@@ -1,4 +1,4 @@
-var cloneBuffer = require('./_cloneBuffer'),
+var cloneArrayBuffer = require('./_cloneArrayBuffer'),
     cloneMap = require('./_cloneMap'),
     cloneRegExp = require('./_cloneRegExp'),
     cloneSet = require('./_cloneSet'),
@@ -42,7 +42,7 @@ function initCloneByTag(object, tag, isDeep) {
   var Ctor = object.constructor;
   switch (tag) {
     case arrayBufferTag:
-      return cloneBuffer(object);
+      return cloneArrayBuffer(object);
 
     case boolTag:
     case dateTag:

_initCloneObject.js

@@ -1,7 +1,9 @@
 var baseCreate = require('./_baseCreate'),
-    isFunction = require('./isFunction'),
     isPrototype = require('./_isPrototype');
 
+/** Built-in value references. */
+var getPrototypeOf = Object.getPrototypeOf;
+
 /**
  * Initializes an object clone.
  *
@@ -10,11 +12,9 @@ var baseCreate = require('./_baseCreate'),
  * @returns {Object} Returns the initialized clone.
  */
 function initCloneObject(object) {
-  if (isPrototype(object)) {
+  return (typeof object.constructor == 'function' && !isPrototype(object))
-    return {};
+    ? baseCreate(getPrototypeOf(object))
-  }
+    : {};
-  var Ctor = object.constructor;
-  return baseCreate(isFunction(Ctor) ? Ctor.prototype : undefined);
 }
 
 module.exports = initCloneObject;

_isIterateeCall.js

@@ -4,7 +4,7 @@ var eq = require('./eq'),
     isObject = require('./isObject');
 
 /**
- * Checks if the provided arguments are from an iteratee call.
+ * Checks if the given arguments are from an iteratee call.
  *
  * @private
  * @param {*} value The potential iteratee value argument.

_isKeyable.js

@@ -8,7 +8,7 @@
 function isKeyable(value) {
   var type = typeof value;
   return type == 'number' || type == 'boolean' ||
-    (type == 'string' && value !== '__proto__') || value == null;
+    (type == 'string' && value != '__proto__') || value == null;
 }
 
 module.exports = isKeyable;

_isPrototype.js

@@ -1,5 +1,5 @@
 /** Used for built-in method references. */
-var objectProto = global.Object.prototype;
+var objectProto = Object.prototype;
 
 /**
  * Checks if `value` is likely a prototype object.

_lazyValue.js

@@ -36,7 +36,8 @@ function lazyValue() {
       resIndex = 0,
       takeCount = nativeMin(length, this.__takeCount__);
 
-  if (!isArr || arrLength < LARGE_ARRAY_SIZE || (arrLength == length && takeCount == length)) {
+  if (!isArr || arrLength < LARGE_ARRAY_SIZE ||
+      (arrLength == length && takeCount == length)) {
     return baseWrapperValue(array, this.__actions__);
   }
   var result = [];

_mapClear.js

@@ -9,7 +9,11 @@ var Hash = require('./_Hash'),
  * @memberOf MapCache
  */
 function mapClear() {
-  this.__data__ = { 'hash': new Hash, 'map': Map ? new Map : [], 'string': new Hash };
+  this.__data__ = {
+    'hash': new Hash,
+    'map': Map ? new Map : [],
+    'string': new Hash
+  };
 }
 
 module.exports = mapClear;

_mergeData.js

@@ -3,6 +3,9 @@ var composeArgs = require('./_composeArgs'),
     copyArray = require('./_copyArray'),
     replaceHolders = require('./_replaceHolders');
 
+/** Used as the internal argument placeholder. */
+var PLACEHOLDER = '__lodash_placeholder__';
+
 /** Used to compose bitmasks for wrapper metadata. */
 var BIND_FLAG = 1,
     BIND_KEY_FLAG = 2,
@@ -11,9 +14,6 @@ var BIND_FLAG = 1,
     ARY_FLAG = 128,
     REARG_FLAG = 256;
 
-/** Used as the internal argument placeholder. */
-var PLACEHOLDER = '__lodash_placeholder__';
-
 /* Built-in method references for those with the same name as other `lodash` methods. */
 var nativeMin = Math.min;
 
@@ -39,9 +39,9 @@ function mergeData(data, source) {
       isCommon = newBitmask < (BIND_FLAG | BIND_KEY_FLAG | ARY_FLAG);
 
   var isCombo =
-    (srcBitmask == ARY_FLAG && (bitmask == CURRY_FLAG)) ||
+    ((srcBitmask == ARY_FLAG) && (bitmask == CURRY_FLAG)) ||
-    (srcBitmask == ARY_FLAG && (bitmask == REARG_FLAG) && (data[7].length <= source[8])) ||
+    ((srcBitmask == ARY_FLAG) && (bitmask == REARG_FLAG) && (data[7].length <= source[8])) ||
-    (srcBitmask == (ARY_FLAG | REARG_FLAG) && (source[7].length <= source[8]) && (bitmask == CURRY_FLAG));
+    ((srcBitmask == (ARY_FLAG | REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == CURRY_FLAG));
 
   // Exit early if metadata can't be merged.
   if (!(isCommon || isCombo)) {
@@ -51,7 +51,7 @@ function mergeData(data, source) {
   if (srcBitmask & BIND_FLAG) {
     data[2] = source[2];
     // Set when currying a bound function.
-    newBitmask |= (bitmask & BIND_FLAG) ? 0 : CURRY_BOUND_FLAG;
+    newBitmask |= bitmask & BIND_FLAG ? 0 : CURRY_BOUND_FLAG;
   }
   // Compose partial arguments.
   var value = source[3];

_mergeDefaults.js

@@ -15,8 +15,7 @@ var baseMerge = require('./_baseMerge'),
  */
 function mergeDefaults(objValue, srcValue, key, object, source, stack) {
   if (isObject(objValue) && isObject(srcValue)) {
-    stack.set(srcValue, objValue);
+    baseMerge(objValue, srcValue, undefined, mergeDefaults, stack.set(srcValue, objValue));
-    baseMerge(objValue, srcValue, undefined, mergeDefaults, stack);
   }
   return objValue;
 }

_replaceHolders.js

@@ -13,13 +13,14 @@ var PLACEHOLDER = '__lodash_placeholder__';
 function replaceHolders(array, placeholder) {
   var index = -1,
       length = array.length,
-      resIndex = -1,
+      resIndex = 0,
       result = [];
 
   while (++index < length) {
-    if (array[index] === placeholder) {
+    var value = array[index];
+    if (value === placeholder || value === PLACEHOLDER) {
       array[index] = PLACEHOLDER;
-      result[++resIndex] = index;
+      result[resIndex++] = index;
     }
   }
   return result;

_root.js

@@ -0,0 +1,41 @@
+var checkGlobal = require('./_checkGlobal');
+
+/** Used to determine if values are of the language type `Object`. */
+var objectTypes = {
+  'function': true,
+  'object': true
+};
+
+/** Detect free variable `exports`. */
+var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType)
+  ? exports
+  : undefined;
+
+/** Detect free variable `module`. */
+var freeModule = (objectTypes[typeof module] && module && !module.nodeType)
+  ? module
+  : undefined;
+
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = checkGlobal(freeExports && freeModule && typeof global == 'object' && global);
+
+/** Detect free variable `self`. */
+var freeSelf = checkGlobal(objectTypes[typeof self] && self);
+
+/** Detect free variable `window`. */
+var freeWindow = checkGlobal(objectTypes[typeof window] && window);
+
+/** Detect `this` as the global object. */
+var thisGlobal = checkGlobal(objectTypes[typeof this] && this);
+
+/**
+ * Used as a reference to the global object.
+ *
+ * The `this` value is used if it's the global object to avoid Greasemonkey's
+ * restricted `window` object, otherwise the `window` object is used.
+ */
+var root = freeGlobal ||
+  ((freeWindow !== (thisGlobal && thisGlobal.window)) && freeWindow) ||
+    freeSelf || thisGlobal || Function('return this')();
+
+module.exports = root;

_toArrayLikeObject.js

@@ -1,14 +0,0 @@
-var isArrayLikeObject = require('./isArrayLikeObject');
-
-/**
- * Converts `value` to an array-like object if it's not one.
- *
- * @private
- * @param {*} value The value to process.
- * @returns {Array} Returns the array-like object.
- */
-function toArrayLikeObject(value) {
-  return isArrayLikeObject(value) ? value : [];
-}
-
-module.exports = toArrayLikeObject;

_toFunction.js

@@ -1,14 +0,0 @@
-var identity = require('./identity');
-
-/**
- * Converts `value` to a function if it's not one.
- *
- * @private
- * @param {*} value The value to process.
- * @returns {Function} Returns the function.
- */
-function toFunction(value) {
-  return typeof value == 'function' ? value : identity;
-}
-
-module.exports = toFunction;

add.js

@@ -14,6 +14,9 @@
  */
 function add(augend, addend) {
   var result;
+  if (augend === undefined && addend === undefined) {
+    return 0;
+  }
   if (augend !== undefined) {
     result = augend;
   }

array.js

@@ -12,9 +12,9 @@ module.exports = {
   'fill': require('./fill'),
   'findIndex': require('./findIndex'),
   'findLastIndex': require('./findLastIndex'),
-  'flatMap': require('./flatMap'),
   'flatten': require('./flatten'),
   'flattenDeep': require('./flattenDeep'),
+  'flattenDepth': require('./flattenDepth'),
   'fromPairs': require('./fromPairs'),
   'head': require('./head'),
   'indexOf': require('./indexOf'),
@@ -28,6 +28,7 @@ module.exports = {
   'pull': require('./pull'),
   'pullAll': require('./pullAll'),
   'pullAllBy': require('./pullAllBy'),
+  'pullAllWith': require('./pullAllWith'),
   'pullAt': require('./pullAt'),
   'remove': require('./remove'),
   'reverse': require('./reverse'),

assign.js

@@ -1,7 +1,22 @@
-var copyObject = require('./_copyObject'),
+var assignValue = require('./_assignValue'),
+    copyObject = require('./_copyObject'),
     createAssigner = require('./_createAssigner'),
+    isArrayLike = require('./isArrayLike'),
+    isPrototype = require('./_isPrototype'),
     keys = require('./keys');
 
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/** Built-in value references. */
+var propertyIsEnumerable = objectProto.propertyIsEnumerable;
+
+/** Detect if properties shadowing those on `Object.prototype` are non-enumerable. */
+var nonEnumShadows = !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf');
+
 /**
  * Assigns own enumerable properties of source objects to the destination
  * object. Source objects are applied from left to right. Subsequent sources
@@ -33,7 +48,15 @@ var copyObject = require('./_copyObject'),
  * // => { 'a': 1, 'c': 3, 'e': 5 }
  */
 var assign = createAssigner(function(object, source) {
-  copyObject(source, keys(source), object);
+  if (nonEnumShadows || isPrototype(source) || isArrayLike(source)) {
+    copyObject(source, keys(source), object);
+    return;
+  }
+  for (var key in source) {
+    if (hasOwnProperty.call(source, key)) {
+      assignValue(object, key, source[key]);
+    }
+  }
 });
 
 module.exports = assign;

assignIn.js

@@ -1,7 +1,19 @@
-var copyObject = require('./_copyObject'),
+var assignValue = require('./_assignValue'),
+    copyObject = require('./_copyObject'),
     createAssigner = require('./_createAssigner'),
+    isArrayLike = require('./isArrayLike'),
+    isPrototype = require('./_isPrototype'),
     keysIn = require('./keysIn');
 
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Built-in value references. */
+var propertyIsEnumerable = objectProto.propertyIsEnumerable;
+
+/** Detect if properties shadowing those on `Object.prototype` are non-enumerable. */
+var nonEnumShadows = !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf');
+
 /**
  * This method is like `_.assign` except that it iterates over own and
  * inherited source properties.
@@ -32,7 +44,13 @@ var copyObject = require('./_copyObject'),
  * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4, 'e': 5 }
  */
 var assignIn = createAssigner(function(object, source) {
-  copyObject(source, keysIn(source), object);
+  if (nonEnumShadows || isPrototype(source) || isArrayLike(source)) {
+    copyObject(source, keysIn(source), object);
+    return;
+  }
+  for (var key in source) {
+    assignValue(object, key, source[key]);
+  }
 });
 
 module.exports = assignIn;