Bump to v4.16.1.

README.md

@@ -1,9 +1,9 @@
-# lodash-amd v4.14.0
+# lodash-amd v4.16.1
 
 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/4.14.0-amd) for more details.
+See the [package source](https://github.com/lodash/lodash/tree/4.16.1-amd) for more details.

_Reflect.js

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

_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`.

_arrayIncludes.js

@@ -5,7 +5,7 @@ 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`.
    */

_arrayIncludesWith.js

@@ -4,7 +4,7 @@ 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`.

_arrayLikeKeys.js

@@ -0,0 +1,37 @@
+define(['./_baseTimes', './isArguments', './isArray', './_isIndex'], function(baseTimes, isArguments, isArray, isIndex) {
+
+  /** 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) {
+    // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
+    // Safari 9 makes `arguments.length` enumerable in strict mode.
+    var result = (isArray(value) || isArguments(value))
+      ? baseTimes(value.length, String)
+      : [];
+
+    var length = result.length,
+        skipIndexes = !!length;
+
+    for (var key in value) {
+      if ((inherited || hasOwnProperty.call(value, key)) &&
+          !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+        result.push(key);
+      }
+    }
+    return result;
+  }
+
+  return arrayLikeKeys;
+});

_arraySample.js

@@ -0,0 +1,20 @@
+define(['./_baseRandom'], function(baseRandom) {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /**
+   * A specialized version of `_.sample` for arrays without support for iteratee
+   * shorthands.
+   *
+   * @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 +1,18 @@
+define(['./_arrayShuffle', './_baseClamp'], function(arrayShuffle, baseClamp) {
+
+  /**
+   * 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) {
+    var result = arrayShuffle(array);
+    result.length = baseClamp(n, 0, result.length);
+    return result;
+  }
+
+  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;
+});

_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;
@@ -15,7 +15,7 @@ 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;
+      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`.
    */

_baseAssignValue.js

@@ -0,0 +1,29 @@
+define([], function() {
+
+  /** Built-in value references. */
+  var defineProperty = Object.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;
+});

_baseClone.js

@@ -1,4 +1,4 @@
-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', './_cloneBuffer', './_copyArray', './_copySymbols', './_getAllKeys', './_getTag', './_initCloneArray', './_initCloneByTag', './_initCloneObject', './isArray', './isBuffer', './isObject', './keys'], function(Stack, arrayEach, assignValue, baseAssign, cloneBuffer, copyArray, copySymbols, getAllKeys, getTag, initCloneArray, initCloneByTag, initCloneObject, isArray, isBuffer, isObject, keys) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -87,9 +87,6 @@ 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);
         if (!isDeep) {
           return copySymbols(value, baseAssign(result, value));
@@ -120,9 +117,6 @@ define(['./_Stack', './_arrayEach', './_assignValue', './_baseAssign', './_clone
       // Recursively populate clone (susceptible to call stack limits).
       assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
     });
-    if (!isFull) {
-      stack['delete'](value);
-    }
     return result;
   }
 

_baseConformsTo.js

@@ -16,14 +16,13 @@ define([], function() {
     if (object == null) {
       return !length;
     }
-    var index = length;
-    while (index--) {
-      var key = props[index],
+    object = Object(object);
+    while (length--) {
+      var key = props[length],
           predicate = source[key],
           value = object[key];
 
-      if ((value === undefined &&
-          !(key in Object(object))) || !predicate(value)) {
+      if ((value === undefined && !(key in object)) || !predicate(value)) {
         return false;
       }
     }

_baseDelay.js

@@ -14,7 +14,7 @@ define([], function() {
    * @param {Function} func The function to delay.
    * @param {number} wait The number of milliseconds to delay invocation.
    * @param {Array} args The arguments to provide to `func`.
-   * @returns {number} Returns the timer id.
+   * @returns {number|Object} Returns the timer id or timeout object.
    */
   function baseDelay(func, wait, args) {
     if (typeof func != 'function') {

_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`.

_baseGetTag.js

@@ -5,7 +5,7 @@ define([], function() {
 
   /**
    * Used to resolve the
-   * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+   * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
    * of values.
    */
   var objectToString = objectProto.toString;

_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;

_baseIndexOf.js

@@ -1,27 +1,18 @@
-define(['./_baseFindIndex', './_baseIsNaN'], function(baseFindIndex, baseIsNaN) {
+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 baseFindIndex(array, baseIsNaN, 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.

_baseIsArrayBuffer.js

@@ -7,7 +7,7 @@ define(['./isObjectLike'], function(isObjectLike) {
 
   /**
    * Used to resolve the
-   * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+   * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
    * of values.
    */
   var objectToString = objectProto.toString;

_baseIsDate.js

@@ -8,7 +8,7 @@ define(['./isObjectLike'], function(isObjectLike) {
 
   /**
    * Used to resolve the
-   * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+   * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
    * of values.
    */
   var objectToString = objectProto.toString;

_baseIsEqualDeep.js

@@ -1,4 +1,4 @@
-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', './isTypedArray'], function(Stack, equalArrays, equalByTag, equalObjects, getTag, isArray, isTypedArray) {
 
   /** Used to compose bitmasks for comparison styles. */
   var PARTIAL_COMPARE_FLAG = 2;
@@ -43,8 +43,8 @@ define(['./_Stack', './_equalArrays', './_equalByTag', './_equalObjects', './_ge
       othTag = getTag(other);
       othTag = othTag == argsTag ? objectTag : othTag;
     }
-    var objIsObj = objTag == objectTag && !isHostObject(object),
-        othIsObj = othTag == objectTag && !isHostObject(other),
+    var objIsObj = objTag == objectTag,
+        othIsObj = othTag == objectTag,
         isSameTag = objTag == othTag;
 
     if (isSameTag && !objIsObj) {

_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

@@ -8,7 +8,7 @@ define(['./isObject'], function(isObject) {
 
   /**
    * Used to resolve the
-   * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+   * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
    * of values.
    */
   var objectToString = objectProto.toString;

_baseIsTypedArray.js

@@ -48,7 +48,7 @@ define(['./isLength', './isObjectLike'], function(isLength, isObjectLike) {
 
   /**
    * Used to resolve the
-   * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+   * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
    * of values.
    */
   var objectToString = objectProto.toString;

_baseKeys.js

@@ -1,17 +1,30 @@
-define(['./_overArg'], function(overArg) {
+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.
    */
-  var baseKeys = overArg(nativeKeys, Object);
+  function baseKeys(object) {
+    if (!isPrototype(object)) {
+      return nativeKeys(object);
+    }
+    var result = [];
+    for (var key in Object(object)) {
+      if (hasOwnProperty.call(object, key) && key != 'constructor') {
+        result.push(key);
+      }
+    }
+    return result;
+  }
 
   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;
 });

_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', './_arrayEach', './_assignMergeValue', './_baseKeysIn', './_baseMergeDeep', './isArray', './isObject', './isTypedArray'], function(Stack, arrayEach, assignMergeValue, baseKeysIn, baseMergeDeep, isArray, isObject, isTypedArray) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -19,7 +19,7 @@ define(['./_Stack', './_arrayEach', './_assignMergeValue', './_baseMergeDeep', '
       return;
     }
     if (!(isArray(source) || isTypedArray(source))) {
-      var props = keysIn(source);
+      var props = baseKeysIn(source);
     }
     arrayEach(props || source, function(srcValue, key) {
       if (props) {

_basePickBy.js

@@ -1,4 +1,4 @@
-define([], function() {
+define(['./_baseAssignValue'], function(baseAssignValue) {
 
   /**
    * The base implementation of  `_.pickBy` without support for iteratee shorthands.
@@ -19,7 +19,7 @@ define([], function() {
           value = object[key];
 
       if (predicate(value, key)) {
-        result[key] = value;
+        baseAssignValue(result, key, value);
       }
     }
     return result;

_baseRest.js

@@ -1,10 +1,4 @@
-define(['./_apply'], function(apply) {
-
-  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
-  var undefined;
-
-  /* Built-in method references for those with the same name as other `lodash` methods. */
-  var nativeMax = Math.max;
+define(['./identity', './_overRest', './_setToString'], function(identity, overRest, setToString) {
 
   /**
    * The base implementation of `_.rest` which doesn't validate or coerce arguments.
@@ -15,24 +9,7 @@ define(['./_apply'], function(apply) {
    * @returns {Function} Returns the new function.
    */
   function baseRest(func, start) {
-    start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
-    return function() {
-      var args = arguments,
-          index = -1,
-          length = nativeMax(args.length - start, 0),
-          array = Array(length);
-
-      while (++index < length) {
-        array[index] = args[start + index];
-      }
-      index = -1;
-      var otherArgs = Array(start + 1);
-      while (++index < start) {
-        otherArgs[index] = args[index];
-      }
-      otherArgs[start] = array;
-      return apply(func, this, otherArgs);
-    };
+    return setToString(overRest(func, start, identity), func + '');
   }
 
   return baseRest;

_baseSet.js

@@ -7,13 +7,16 @@ 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) {
+    if (!isObject(object)) {
+      return object;
+    }
     path = isKey(path, object) ? [path] : castPath(path);
 
     var index = -1,
@@ -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', './identity', './_nativeDefineProperty'], function(constant, identity, nativeDefineProperty) {
+
+  /**
+   * 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 = !nativeDefineProperty ? identity : function(func, string) {
+    return nativeDefineProperty(func, 'toString', {
+      'configurable': true,
+      'enumerable': false,
+      'value': constant(string),
+      'writable': true
+    });
+  };
+
+  return baseSetToString;
+});

_baseUnset.js

@@ -1,4 +1,10 @@
-define(['./_baseHas', './_castPath', './_isKey', './last', './_parent', './_toKey'], function(baseHas, castPath, isKey, last, parent, toKey) {
+define(['./_castPath', './_isKey', './last', './_parent', './_toKey'], function(castPath, isKey, last, parent, toKey) {
+
+  /** Used for built-in method references. */
+  var objectProto = Object.prototype;
+
+  /** Used to check objects for own properties. */
+  var hasOwnProperty = objectProto.hasOwnProperty;
 
   /**
    * The base implementation of `_.unset`.
@@ -13,7 +19,7 @@ define(['./_baseHas', './_castPath', './_isKey', './last', './_parent', './_toKe
     object = parent(object, path);
 
     var key = toKey(last(path));
-    return !(object != null && baseHas(object, key)) || delete object[key];
+    return !(object != null && hasOwnProperty.call(object, key)) || delete object[key];
   }
 
   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.

_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.

_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;
+});

_copyObject.js

@@ -1,4 +1,4 @@
-define(['./_assignValue'], function(assignValue) {
+define(['./_assignValue', './_baseAssignValue'], function(assignValue, baseAssignValue) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -14,6 +14,7 @@ define(['./_assignValue'], function(assignValue) {
    * @returns {Object} Returns `object`.
    */
   function copyObject(source, props, object, customizer) {
+    var isNew = !object;
     object || (object = {});
 
     var index = -1,
@@ -26,7 +27,14 @@ define(['./_assignValue'], function(assignValue) {
         ? customizer(object[key], source[key], key, object, source)
         : undefined;
 
-      assignValue(object, key, newValue === undefined ? source[key] : newValue);
+      if (newValue === undefined) {
+        newValue = source[key];
+      }
+      if (isNew) {
+        baseAssignValue(object, key, newValue);
+      } else {
+        assignValue(object, key, newValue);
+      }
     }
     return object;
   }

_countHolders.js

@@ -14,7 +14,7 @@ define([], function() {
 
     while (length--) {
       if (array[length] === placeholder) {
-        result++;
+        ++result;
       }
     }
     return result;

_createCaseFirst.js

@@ -1,4 +1,4 @@
-define(['./_castSlice', './_reHasComplexSymbol', './_stringToArray', './toString'], function(castSlice, reHasComplexSymbol, stringToArray, toString) {
+define(['./_castSlice', './_hasUnicode', './_stringToArray', './toString'], function(castSlice, hasUnicode, stringToArray, toString) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -14,7 +14,7 @@ define(['./_castSlice', './_reHasComplexSymbol', './_stringToArray', './toString
     return function(string) {
       string = toString(string);
 
-      var strSymbols = reHasComplexSymbol.test(string)
+      var strSymbols = hasUnicode(string)
         ? stringToArray(string)
         : undefined;
 

_createCtor.js

@@ -11,7 +11,7 @@ define(['./_baseCreate', './isObject'], function(baseCreate, isObject) {
   function createCtor(Ctor) {
     return function() {
       // Use a `switch` statement to work with class constructors. See
-      // http://ecma-international.org/ecma-262/6.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
+      // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
       // for more details.
       var args = arguments;
       switch (args.length) {

_createFlow.js

@@ -1,4 +1,4 @@
-define(['./_LodashWrapper', './_baseFlatten', './_baseRest', './_getData', './_getFuncName', './isArray', './_isLaziable'], function(LodashWrapper, baseFlatten, baseRest, getData, getFuncName, isArray, isLaziable) {
+define(['./_LodashWrapper', './_flatRest', './_getData', './_getFuncName', './isArray', './_isLaziable'], function(LodashWrapper, flatRest, getData, getFuncName, isArray, isLaziable) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -23,9 +23,7 @@ define(['./_LodashWrapper', './_baseFlatten', './_baseRest', './_getData', './_g
    * @returns {Function} Returns the new flow function.
    */
   function createFlow(fromRight) {
-    return baseRest(function(funcs) {
-      funcs = baseFlatten(funcs, 1);
-
+    return flatRest(function(funcs) {
       var length = funcs.length,
           index = length,
           prereq = LodashWrapper.prototype.thru;

_createOver.js

@@ -1,4 +1,4 @@
-define(['./_apply', './_arrayMap', './_baseFlatten', './_baseIteratee', './_baseRest', './_baseUnary', './isArray'], function(apply, arrayMap, baseFlatten, baseIteratee, baseRest, baseUnary, isArray) {
+define(['./_apply', './_arrayMap', './_baseIteratee', './_baseRest', './_baseUnary', './_flatRest'], function(apply, arrayMap, baseIteratee, baseRest, baseUnary, flatRest) {
 
   /**
    * Creates a function like `_.over`.
@@ -8,11 +8,8 @@ define(['./_apply', './_arrayMap', './_baseFlatten', './_baseIteratee', './_base
    * @returns {Function} Returns the new over function.
    */
   function createOver(arrayFunc) {
-    return baseRest(function(iteratees) {
-      iteratees = (iteratees.length == 1 && isArray(iteratees[0]))
-        ? arrayMap(iteratees[0], baseUnary(baseIteratee))
-        : arrayMap(baseFlatten(iteratees, 1), baseUnary(baseIteratee));
-
+    return flatRest(function(iteratees) {
+      iteratees = arrayMap(iteratees, baseUnary(baseIteratee));
       return baseRest(function(args) {
         var thisArg = this;
         return arrayFunc(iteratees, function(iteratee) {

_createPadding.js

@@ -1,4 +1,4 @@
-define(['./_baseRepeat', './_baseToString', './_castSlice', './_reHasComplexSymbol', './_stringSize', './_stringToArray'], function(baseRepeat, baseToString, castSlice, reHasComplexSymbol, stringSize, stringToArray) {
+define(['./_baseRepeat', './_baseToString', './_castSlice', './_hasUnicode', './_stringSize', './_stringToArray'], function(baseRepeat, baseToString, castSlice, hasUnicode, stringSize, stringToArray) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -23,7 +23,7 @@ define(['./_baseRepeat', './_baseToString', './_castSlice', './_reHasComplexSymb
       return charsLength ? baseRepeat(chars, length) : chars;
     }
     var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
-    return reHasComplexSymbol.test(chars)
+    return hasUnicode(chars)
       ? castSlice(stringToArray(result), 0, length).join('')
       : result.slice(0, length);
   }

_createRange.js

@@ -1,4 +1,4 @@
-define(['./_baseRange', './_isIterateeCall', './toNumber'], function(baseRange, isIterateeCall, toNumber) {
+define(['./_baseRange', './_isIterateeCall', './toFinite'], function(baseRange, isIterateeCall, toFinite) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -16,15 +16,14 @@ define(['./_baseRange', './_isIterateeCall', './toNumber'], function(baseRange,
         end = step = undefined;
       }
       // Ensure the sign of `-0` is preserved.
-      start = toNumber(start);
-      start = start === start ? start : 0;
+      start = toFinite(start);
       if (end === undefined) {
         end = start;
         start = 0;
       } else {
-        end = toNumber(end) || 0;
+        end = toFinite(end);
       }
-      step = step === undefined ? (start < end ? 1 : -1) : (toNumber(step) || 0);
+      step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
       return baseRange(start, end, step, fromRight);
     };
   }

_deburrLetter.js

@@ -1,15 +1,16 @@
 define(['./_basePropertyOf'], function(basePropertyOf) {
 
-  /** Used to map latin-1 supplementary letters to basic latin letters. */
+  /** Used to map Latin Unicode letters to basic Latin letters. */
   var deburredLetters = {
+    // Latin-1 Supplement block.
     '\xc0': 'A',  '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
     '\xe0': 'a',  '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
     '\xc7': 'C',  '\xe7': 'c',
     '\xd0': 'D',  '\xf0': 'd',
     '\xc8': 'E',  '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
     '\xe8': 'e',  '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
-    '\xcC': 'I',  '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
-    '\xeC': 'i',  '\xed': 'i', '\xee': 'i', '\xef': 'i',
+    '\xcc': 'I',  '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
+    '\xec': 'i',  '\xed': 'i', '\xee': 'i', '\xef': 'i',
     '\xd1': 'N',  '\xf1': 'n',
     '\xd2': 'O',  '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
     '\xf2': 'o',  '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
@@ -18,11 +19,48 @@ define(['./_basePropertyOf'], function(basePropertyOf) {
     '\xdd': 'Y',  '\xfd': 'y', '\xff': 'y',
     '\xc6': 'Ae', '\xe6': 'ae',
     '\xde': 'Th', '\xfe': 'th',
-    '\xdf': 'ss'
+    '\xdf': 'ss',
+    // Latin Extended-A block.
+    '\u0100': 'A',  '\u0102': 'A', '\u0104': 'A',
+    '\u0101': 'a',  '\u0103': 'a', '\u0105': 'a',
+    '\u0106': 'C',  '\u0108': 'C', '\u010a': 'C', '\u010c': 'C',
+    '\u0107': 'c',  '\u0109': 'c', '\u010b': 'c', '\u010d': 'c',
+    '\u010e': 'D',  '\u0110': 'D', '\u010f': 'd', '\u0111': 'd',
+    '\u0112': 'E',  '\u0114': 'E', '\u0116': 'E', '\u0118': 'E', '\u011a': 'E',
+    '\u0113': 'e',  '\u0115': 'e', '\u0117': 'e', '\u0119': 'e', '\u011b': 'e',
+    '\u011c': 'G',  '\u011e': 'G', '\u0120': 'G', '\u0122': 'G',
+    '\u011d': 'g',  '\u011f': 'g', '\u0121': 'g', '\u0123': 'g',
+    '\u0124': 'H',  '\u0126': 'H', '\u0125': 'h', '\u0127': 'h',
+    '\u0128': 'I',  '\u012a': 'I', '\u012c': 'I', '\u012e': 'I', '\u0130': 'I',
+    '\u0129': 'i',  '\u012b': 'i', '\u012d': 'i', '\u012f': 'i', '\u0131': 'i',
+    '\u0134': 'J',  '\u0135': 'j',
+    '\u0136': 'K',  '\u0137': 'k', '\u0138': 'k',
+    '\u0139': 'L',  '\u013b': 'L', '\u013d': 'L', '\u013f': 'L', '\u0141': 'L',
+    '\u013a': 'l',  '\u013c': 'l', '\u013e': 'l', '\u0140': 'l', '\u0142': 'l',
+    '\u0143': 'N',  '\u0145': 'N', '\u0147': 'N', '\u014a': 'N',
+    '\u0144': 'n',  '\u0146': 'n', '\u0148': 'n', '\u014b': 'n',
+    '\u014c': 'O',  '\u014e': 'O', '\u0150': 'O',
+    '\u014d': 'o',  '\u014f': 'o', '\u0151': 'o',
+    '\u0154': 'R',  '\u0156': 'R', '\u0158': 'R',
+    '\u0155': 'r',  '\u0157': 'r', '\u0159': 'r',
+    '\u015a': 'S',  '\u015c': 'S', '\u015e': 'S', '\u0160': 'S',
+    '\u015b': 's',  '\u015d': 's', '\u015f': 's', '\u0161': 's',
+    '\u0162': 'T',  '\u0164': 'T', '\u0166': 'T',
+    '\u0163': 't',  '\u0165': 't', '\u0167': 't',
+    '\u0168': 'U',  '\u016a': 'U', '\u016c': 'U', '\u016e': 'U', '\u0170': 'U', '\u0172': 'U',
+    '\u0169': 'u',  '\u016b': 'u', '\u016d': 'u', '\u016f': 'u', '\u0171': 'u', '\u0173': 'u',
+    '\u0174': 'W',  '\u0175': 'w',
+    '\u0176': 'Y',  '\u0177': 'y', '\u0178': 'Y',
+    '\u0179': 'Z',  '\u017b': 'Z', '\u017d': 'Z',
+    '\u017a': 'z',  '\u017c': 'z', '\u017e': 'z',
+    '\u0132': 'IJ', '\u0133': 'ij',
+    '\u0152': 'Oe', '\u0153': 'oe',
+    '\u0149': "'n", '\u017f': 's'
   };
 
   /**
-   * Used by `_.deburr` to convert latin-1 supplementary letters to basic latin letters.
+   * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
+   * letters to basic Latin letters.
    *
    * @private
    * @param {string} letter The matched letter to deburr.

_defineProperty.js

@@ -1,15 +0,0 @@
-define(['./_getNative'], function(getNative) {
-
-  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
-  var undefined;
-
-  /* Used to set `toString` methods. */
-  var defineProperty = (function() {
-    var func = getNative(Object, 'defineProperty'),
-        name = getNative.name;
-
-    return (name && name.length > 2) ? func : undefined;
-  }());
-
-  return defineProperty;
-});

_equalArrays.js

@@ -1,4 +1,4 @@
-define(['./_SetCache', './_arraySome'], function(SetCache, arraySome) {
+define(['./_SetCache', './_arraySome', './_cacheHas'], function(SetCache, arraySome, cacheHas) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -61,9 +61,9 @@ define(['./_SetCache', './_arraySome'], function(SetCache, arraySome) {
       // Recursively compare arrays (susceptible to call stack limits).
       if (seen) {
         if (!arraySome(other, function(othValue, othIndex) {
-              if (!seen.has(othIndex) &&
+              if (!cacheHas(seen, othIndex) &&
                   (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
-                return seen.add(othIndex);
+                return seen.push(othIndex);
               }
             })) {
           result = false;
@@ -78,6 +78,7 @@ define(['./_SetCache', './_arraySome'], function(SetCache, arraySome) {
       }
     }
     stack['delete'](array);
+    stack['delete'](other);
     return result;
   }
 

_equalByTag.js

@@ -73,7 +73,7 @@ define(['./_Symbol', './_Uint8Array', './eq', './_equalArrays', './_mapToArray',
       case regexpTag:
       case stringTag:
         // Coerce regexes to strings and treat strings, primitives and objects,
-        // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+        // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
         // for more details.
         return object == (other + '');
 

_equalObjects.js

@@ -1,4 +1,4 @@
-define(['./_baseHas', './keys'], function(baseHas, keys) {
+define(['./keys'], function(keys) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -6,6 +6,12 @@ define(['./_baseHas', './keys'], function(baseHas, keys) {
   /** Used to compose bitmasks for comparison styles. */
   var PARTIAL_COMPARE_FLAG = 2;
 
+  /** Used for built-in method references. */
+  var objectProto = Object.prototype;
+
+  /** Used to check objects for own properties. */
+  var hasOwnProperty = objectProto.hasOwnProperty;
+
   /**
    * A specialized version of `baseIsEqualDeep` for objects with support for
    * partial deep comparisons.
@@ -33,7 +39,7 @@ define(['./_baseHas', './keys'], function(baseHas, keys) {
     var index = objLength;
     while (index--) {
       var key = objProps[index];
-      if (!(isPartial ? key in other : baseHas(other, key))) {
+      if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
         return false;
       }
     }
@@ -80,6 +86,7 @@ define(['./_baseHas', './keys'], function(baseHas, keys) {
       }
     }
     stack['delete'](object);
+    stack['delete'](other);
     return result;
   }
 

_escapeHtmlChar.js

@@ -6,8 +6,7 @@ define(['./_basePropertyOf'], function(basePropertyOf) {
     '<': '&lt;',
     '>': '&gt;',
     '"': '&quot;',
-    "'": '&#39;',
-    '`': '&#96;'
+    "'": '&#39;'
   };
 
   /**

_flatRest.js

@@ -0,0 +1,18 @@
+define(['./flatten', './_overRest', './_setToString'], function(flatten, overRest, setToString) {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /**
+   * A specialized version of `baseRest` which flattens the rest array.
+   *
+   * @private
+   * @param {Function} func The function to apply a rest parameter to.
+   * @returns {Function} Returns the new function.
+   */
+  function flatRest(func) {
+    return setToString(overRest(func, undefined, flatten), func + '');
+  }
+
+  return flatRest;
+});

_getLength.js

@@ -1,17 +0,0 @@
-define(['./_baseProperty'], function(baseProperty) {
-
-  /**
-   * Gets the "length" property value of `object`.
-   *
-   * **Note:** This function is used to avoid a
-   * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
-   * Safari on at least iOS 8.1-8.3 ARM64.
-   *
-   * @private
-   * @param {Object} object The object to query.
-   * @returns {*} Returns the "length" value.
-   */
-  var getLength = baseProperty('length');
-
-  return getLength;
-});

_getPrototype.js

@@ -1,16 +1,7 @@
 define(['./_overArg'], function(overArg) {
 
-  /* Built-in method references for those with the same name as other `lodash` methods. */
-  var nativeGetPrototype = Object.getPrototypeOf;
-
-  /**
-   * Gets the `[[Prototype]]` of `value`.
-   *
-   * @private
-   * @param {*} value The value to query.
-   * @returns {null|Object} Returns the `[[Prototype]]`.
-   */
-  var getPrototype = overArg(nativeGetPrototype, Object);
+  /** Built-in value references. */
+  var getPrototype = overArg(Object.getPrototypeOf, Object);
 
   return getPrototype;
 });

_getSymbolsIn.js

@@ -1,4 +1,4 @@
-define(['./_arrayPush', './_getPrototype', './_getSymbols'], function(arrayPush, getPrototype, getSymbols) {
+define(['./_arrayPush', './_getPrototype', './_getSymbols', './stubArray'], function(arrayPush, getPrototype, getSymbols, stubArray) {
 
   /* Built-in method references for those with the same name as other `lodash` methods. */
   var nativeGetSymbols = Object.getOwnPropertySymbols;
@@ -11,7 +11,7 @@ define(['./_arrayPush', './_getPrototype', './_getSymbols'], function(arrayPush,
    * @param {Object} object The object to query.
    * @returns {Array} Returns the array of symbols.
    */
-  var getSymbolsIn = !nativeGetSymbols ? getSymbols : function(object) {
+  var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
     var result = [];
     while (object) {
       arrayPush(result, getSymbols(object));

_getTag.js

@@ -17,7 +17,7 @@ define(['./_DataView', './_Map', './_Promise', './_Set', './_WeakMap', './_baseG
 
   /**
    * Used to resolve the
-   * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+   * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
    * of values.
    */
   var objectToString = objectProto.toString;
@@ -38,8 +38,7 @@ define(['./_DataView', './_Map', './_Promise', './_Set', './_WeakMap', './_baseG
    */
   var getTag = baseGetTag;
 
-  // Fallback for data views, maps, sets, and weak maps in IE 11,
-  // for data views in Edge, and promises in Node.js.
+  // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
   if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
       (Map && getTag(new Map) != mapTag) ||
       (Promise && getTag(Promise.resolve()) != promiseTag) ||

_hasPath.js

@@ -1,4 +1,4 @@
-define(['./_castPath', './isArguments', './isArray', './_isIndex', './_isKey', './isLength', './isString', './_toKey'], function(castPath, isArguments, isArray, isIndex, isKey, isLength, isString, toKey) {
+define(['./_castPath', './isArguments', './isArray', './_isIndex', './_isKey', './isLength', './_toKey'], function(castPath, isArguments, isArray, isIndex, isKey, isLength, toKey) {
 
   /**
    * Checks if `path` exists on `object`.
@@ -12,9 +12,9 @@ define(['./_castPath', './isArguments', './isArray', './_isIndex', './_isKey', '
   function hasPath(object, path, hasFunc) {
     path = isKey(path, object) ? [path] : castPath(path);
 
-    var result,
-        index = -1,
-        length = path.length;
+    var index = -1,
+        length = path.length,
+        result = false;
 
     while (++index < length) {
       var key = toKey(path[index]);
@@ -23,12 +23,12 @@ define(['./_castPath', './isArguments', './isArray', './_isIndex', './_isKey', '
       }
       object = object[key];
     }
-    if (result) {
+    if (result || ++index != length) {
       return result;
     }
-    var length = object ? object.length : 0;
+    length = object ? object.length : 0;
     return !!length && isLength(length) && isIndex(key, length) &&
-      (isArray(object) || isString(object) || isArguments(object));
+      (isArray(object) || isArguments(object));
   }
 
   return hasPath;

_hasUnicode.js

@@ -10,7 +10,18 @@ define([], function() {
   var rsZWJ = '\\u200d';
 
   /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
-  var reHasComplexSymbol = RegExp('[' + rsZWJ + rsAstralRange  + rsComboMarksRange + rsComboSymbolsRange + rsVarRange + ']');
+  var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange  + rsComboMarksRange + rsComboSymbolsRange + rsVarRange + ']');
 
-  return reHasComplexSymbol;
+  /**
+   * Checks if `string` contains Unicode symbols.
+   *
+   * @private
+   * @param {string} string The string to inspect.
+   * @returns {boolean} Returns `true` if a symbol is found, else `false`.
+   */
+  function hasUnicode(string) {
+    return reHasUnicode.test(string);
+  }
+
+  return hasUnicode;
 });

_hasUnicodeWord.js

@@ -0,0 +1,18 @@
+define([], function() {
+
+  /** Used to detect strings that need a more robust regexp to match words. */
+  var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2,}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
+
+  /**
+   * Checks if `string` contains a word composed of Unicode symbols.
+   *
+   * @private
+   * @param {string} string The string to inspect.
+   * @returns {boolean} Returns `true` if a word is found, else `false`.
+   */
+  function hasUnicodeWord(string) {
+    return reHasUnicodeWord.test(string);
+  }
+
+  return hasUnicodeWord;
+});

_hashClear.js

@@ -9,6 +9,7 @@ define(['./_nativeCreate'], function(nativeCreate) {
    */
   function hashClear() {
     this.__data__ = nativeCreate ? nativeCreate(null) : {};
+    this.size = 0;
   }
 
   return hashClear;

_hashDelete.js

@@ -11,7 +11,9 @@ define([], function() {
    * @returns {boolean} Returns `true` if the entry was removed, else `false`.
    */
   function hashDelete(key) {
-    return this.has(key) && delete this.__data__[key];
+    var result = this.has(key) && delete this.__data__[key];
+    this.size -= result ? 1 : 0;
+    return result;
   }
 
   return hashDelete;

_hashSet.js

@@ -18,6 +18,7 @@ define(['./_nativeCreate'], function(nativeCreate) {
    */
   function hashSet(key, value) {
     var data = this.__data__;
+    this.size += this.has(key) ? 0 : 1;
     data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
     return this;
   }

_indexKeys.js

@@ -1,24 +0,0 @@
-define(['./_baseTimes', './isArguments', './isArray', './isLength', './isString'], function(baseTimes, isArguments, isArray, isLength, isString) {
-
-  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
-  var undefined;
-
-  /**
-   * Creates an array of index keys for `object` values of arrays,
-   * `arguments` objects, and strings, otherwise `null` is returned.
-   *
-   * @private
-   * @param {Object} object The object to query.
-   * @returns {Array|null} Returns index keys, else `null`.
-   */
-  function indexKeys(object) {
-    var length = object ? object.length : undefined;
-    if (isLength(length) &&
-        (isArray(object) || isString(object) || isArguments(object))) {
-      return baseTimes(length, String);
-    }
-    return null;
-  }
-
-  return indexKeys;
-});

_insertWrapDetails.js

@@ -12,9 +12,11 @@ define([], function() {
    * @returns {string} Returns the modified source.
    */
   function insertWrapDetails(source, details) {
-    var length = details.length,
-        lastIndex = length - 1;
-
+    var length = details.length;
+    if (!length) {
+      return source;
+    }
+    var lastIndex = length - 1;
     details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
     details = details.join(length > 2 ? ', ' : ' ');
     return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');

_isFlattenable.js

@@ -15,7 +15,7 @@ define(['./_Symbol', './isArguments', './isArray'], function(Symbol, isArguments
    */
   function isFlattenable(value) {
     return isArray(value) || isArguments(value) ||
-      !!(spreadableSymbol && value && value[spreadableSymbol])
+      !!(spreadableSymbol && value && value[spreadableSymbol]);
   }
 
   return isFlattenable;

_isHostObject.js

@@ -1,23 +0,0 @@
-define([], function() {
-
-  /**
-   * Checks if `value` is a host object in IE < 9.
-   *
-   * @private
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
-   */
-  function isHostObject(value) {
-    // Many host objects are `Object` objects that can coerce to strings
-    // despite having improperly defined `toString` methods.
-    var result = false;
-    if (value != null && typeof value.toString != 'function') {
-      try {
-        result = !!(value + '');
-      } catch (e) {}
-    }
-    return result;
-  }
-
-  return isHostObject;
-});

_listCacheClear.js

@@ -9,6 +9,7 @@ define([], function() {
    */
   function listCacheClear() {
     this.__data__ = [];
+    this.size = 0;
   }
 
   return listCacheClear;

_listCacheDelete.js

@@ -28,6 +28,7 @@ define(['./_assocIndexOf'], function(assocIndexOf) {
     } else {
       splice.call(data, index, 1);
     }
+    --this.size;
     return true;
   }
 

_listCacheSet.js

@@ -15,6 +15,7 @@ define(['./_assocIndexOf'], function(assocIndexOf) {
         index = assocIndexOf(data, key);
 
     if (index < 0) {
+      ++this.size;
       data.push([key, value]);
     } else {
       data[index][1] = value;

_mapCacheClear.js

@@ -8,6 +8,7 @@ define(['./_Hash', './_ListCache', './_Map'], function(Hash, ListCache, Map) {
    * @memberOf MapCache
    */
   function mapCacheClear() {
+    this.size = 0;
     this.__data__ = {
       'hash': new Hash,
       'map': new (Map || ListCache),

_mapCacheDelete.js

@@ -10,7 +10,9 @@ define(['./_getMapData'], function(getMapData) {
    * @returns {boolean} Returns `true` if the entry was removed, else `false`.
    */
   function mapCacheDelete(key) {
-    return getMapData(this, key)['delete'](key);
+    var result = getMapData(this, key)['delete'](key);
+    this.size -= result ? 1 : 0;
+    return result;
   }
 
   return mapCacheDelete;

_mapCacheSet.js

@@ -11,7 +11,11 @@ define(['./_getMapData'], function(getMapData) {
    * @returns {Object} Returns the map cache instance.
    */
   function mapCacheSet(key, value) {
-    getMapData(this, key).set(key, value);
+    var data = getMapData(this, key),
+        size = data.size;
+
+    data.set(key, value);
+    this.size += data.size == size ? 0 : 1;
     return this;
   }
 

_memoizeCapped.js

@@ -0,0 +1,27 @@
+define(['./memoize'], function(memoize) {
+
+  /** Used as the maximum memoize cache size. */
+  var MAX_MEMOIZE_SIZE = 500;
+
+  /**
+   * A specialized version of `_.memoize` which clears the memoized function's
+   * cache when it exceeds `MAX_MEMOIZE_SIZE`.
+   *
+   * @private
+   * @param {Function} func The function to have its output memoized.
+   * @returns {Function} Returns the new memoized function.
+   */
+  function memoizeCapped(func) {
+    var result = memoize(func, function(key) {
+      if (cache.size === MAX_MEMOIZE_SIZE) {
+        cache.clear();
+      }
+      return key;
+    });
+
+    var cache = result.cache;
+    return result;
+  }
+
+  return memoizeCapped;
+});

_nativeDefineProperty.js

@@ -0,0 +1,7 @@
+define(['./_getNative'], function(getNative) {
+
+  /* Built-in method references that are verified to be native. */
+  var nativeDefineProperty = getNative(Object, 'defineProperty');
+
+  return nativeDefineProperty;
+});

_nativeKeys.js

@@ -0,0 +1,7 @@
+define(['./_overArg'], function(overArg) {
+
+  /* Built-in method references for those with the same name as other `lodash` methods. */
+  var nativeKeys = overArg(Object.keys, Object);
+
+  return nativeKeys;
+});

_nativeKeysIn.js

@@ -0,0 +1,23 @@
+define([], function() {
+
+  /**
+   * This function is like
+   * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+   * except that it includes inherited enumerable properties.
+   *
+   * @private
+   * @param {Object} object The object to query.
+   * @returns {Array} Returns the array of property names.
+   */
+  function nativeKeysIn(object) {
+    var result = [];
+    if (object != null) {
+      for (var key in Object(object)) {
+        result.push(key);
+      }
+    }
+    return result;
+  }
+
+  return nativeKeysIn;
+});

_nodeUtil.js

@@ -1,10 +1,10 @@
 define(['./_freeGlobal'], function(freeGlobal) {
 
   /** Detect free variable `exports`. */
-  var freeExports = freeGlobal && typeof exports == 'object' && exports;
+  var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
 
   /** Detect free variable `module`. */
-  var freeModule = freeExports && typeof module == 'object' && module;
+  var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
 
   /** Detect the popular CommonJS extension `module.exports`. */
   var moduleExports = freeModule && freeModule.exports === freeExports;

_overArg.js

@@ -1,7 +1,7 @@
 define([], function() {
 
   /**
-   * Creates a function that invokes `func` with its first argument transformed.
+   * Creates a unary function that invokes `func` with its argument transformed.
    *
    * @private
    * @param {Function} func The function to wrap.

_overRest.js

@@ -0,0 +1,40 @@
+define(['./_apply'], function(apply) {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /* Built-in method references for those with the same name as other `lodash` methods. */
+  var nativeMax = Math.max;
+
+  /**
+   * A specialized version of `baseRest` which transforms the rest array.
+   *
+   * @private
+   * @param {Function} func The function to apply a rest parameter to.
+   * @param {number} [start=func.length-1] The start position of the rest parameter.
+   * @param {Function} transform The rest array transform.
+   * @returns {Function} Returns the new function.
+   */
+  function overRest(func, start, transform) {
+    start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+    return function() {
+      var args = arguments,
+          index = -1,
+          length = nativeMax(args.length - start, 0),
+          array = Array(length);
+
+      while (++index < length) {
+        array[index] = args[start + index];
+      }
+      index = -1;
+      var otherArgs = Array(start + 1);
+      while (++index < start) {
+        otherArgs[index] = args[index];
+      }
+      otherArgs[start] = transform(array);
+      return apply(func, this, otherArgs);
+    };
+  }
+
+  return overRest;
+});

_setData.js

@@ -1,8 +1,4 @@
-define(['./_baseSetData', './now'], function(baseSetData, now) {
-
-  /** Used to detect hot functions by number of calls within a span of milliseconds. */
-  var HOT_COUNT = 150,
-      HOT_SPAN = 16;
+define(['./_baseSetData', './_shortOut'], function(baseSetData, shortOut) {
 
   /**
    * Sets metadata for `func`.
@@ -18,25 +14,7 @@ define(['./_baseSetData', './now'], function(baseSetData, now) {
    * @param {*} data The metadata.
    * @returns {Function} Returns `func`.
    */
-  var setData = (function() {
-    var count = 0,
-        lastCalled = 0;
-
-    return function(key, value) {
-      var stamp = now(),
-          remaining = HOT_SPAN - (stamp - lastCalled);
-
-      lastCalled = stamp;
-      if (remaining > 0) {
-        if (++count >= HOT_COUNT) {
-          return key;
-        }
-      } else {
-        count = 0;
-      }
-      return baseSetData(key, value);
-    };
-  }());
+  var setData = shortOut(baseSetData);
 
   return setData;
 });

_setToString.js

@@ -0,0 +1,14 @@
+define(['./_baseSetToString', './_shortOut'], function(baseSetToString, shortOut) {
+
+  /**
+   * Sets the `toString` method of `func` to return `string`.
+   *
+   * @private
+   * @param {Function} func The function to modify.
+   * @param {Function} string The `toString` result.
+   * @returns {Function} Returns `func`.
+   */
+  var setToString = shortOut(baseSetToString);
+
+  return setToString;
+});

_setWrapToString.js

@@ -1,4 +1,4 @@
-define(['./constant', './_defineProperty', './_getWrapDetails', './identity', './_insertWrapDetails', './_updateWrapDetails'], function(constant, defineProperty, getWrapDetails, identity, insertWrapDetails, updateWrapDetails) {
+define(['./_getWrapDetails', './_insertWrapDetails', './_setToString', './_updateWrapDetails'], function(getWrapDetails, insertWrapDetails, setToString, updateWrapDetails) {
 
   /**
    * Sets the `toString` method of `wrapper` to mimic the source of `reference`
@@ -10,14 +10,10 @@ define(['./constant', './_defineProperty', './_getWrapDetails', './identity', '.
    * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
    * @returns {Function} Returns `wrapper`.
    */
-  var setWrapToString = !defineProperty ? identity : function(wrapper, reference, bitmask) {
+  function setWrapToString(wrapper, reference, bitmask) {
     var source = (reference + '');
-    return defineProperty(wrapper, 'toString', {
-      'configurable': true,
-      'enumerable': false,
-      'value': constant(insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)))
-    });
-  };
+    return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));
+  }
 
   return setWrapToString;
 });

_shortOut.js

@@ -0,0 +1,43 @@
+define([], function() {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /** Used to detect hot functions by number of calls within a span of milliseconds. */
+  var HOT_COUNT = 500,
+      HOT_SPAN = 16;
+
+  /* Built-in method references for those with the same name as other `lodash` methods. */
+  var nativeNow = Date.now;
+
+  /**
+   * Creates a function that'll short out and invoke `identity` instead
+   * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
+   * milliseconds.
+   *
+   * @private
+   * @param {Function} func The function to restrict.
+   * @returns {Function} Returns the new shortable function.
+   */
+  function shortOut(func) {
+    var count = 0,
+        lastCalled = 0;
+
+    return function() {
+      var stamp = nativeNow(),
+          remaining = HOT_SPAN - (stamp - lastCalled);
+
+      lastCalled = stamp;
+      if (remaining > 0) {
+        if (++count >= HOT_COUNT) {
+          return arguments[0];
+        }
+      } else {
+        count = 0;
+      }
+      return func.apply(undefined, arguments);
+    };
+  }
+
+  return shortOut;
+});

_shuffleSelf.js

@@ -0,0 +1,26 @@
+define(['./_baseRandom'], function(baseRandom) {
+
+  /**
+   * A specialized version of `arrayShuffle` which mutates `array`.
+   *
+   * @private
+   * @param {Array} array The array to shuffle.
+   * @returns {Array} Returns `array`.
+   */
+  function shuffleSelf(array) {
+    var index = -1,
+        length = array.length,
+        lastIndex = length - 1;
+
+    while (++index < length) {
+      var rand = baseRandom(index, lastIndex),
+          value = array[rand];
+
+      array[rand] = array[index];
+      array[index] = value;
+    }
+    return array;
+  }
+
+  return shuffleSelf;
+});

_stackClear.js

@@ -9,6 +9,7 @@ define(['./_ListCache'], function(ListCache) {
    */
   function stackClear() {
     this.__data__ = new ListCache;
+    this.size = 0;
   }
 
   return stackClear;

_stackDelete.js

@@ -10,7 +10,11 @@ define([], function() {
    * @returns {boolean} Returns `true` if the entry was removed, else `false`.
    */
   function stackDelete(key) {
-    return this.__data__['delete'](key);
+    var data = this.__data__,
+        result = data['delete'](key);
+
+    this.size = data.size;
+    return result;
   }
 
   return stackDelete;

_stackSet.js

@@ -14,16 +14,18 @@ define(['./_ListCache', './_Map', './_MapCache'], function(ListCache, Map, MapCa
    * @returns {Object} Returns the stack cache instance.
    */
   function stackSet(key, value) {
-    var cache = this.__data__;
-    if (cache instanceof ListCache) {
-      var pairs = cache.__data__;
+    var data = this.__data__;
+    if (data instanceof ListCache) {
+      var pairs = data.__data__;
       if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
         pairs.push([key, value]);
+        this.size = ++data.size;
         return this;
       }
-      cache = this.__data__ = new MapCache(pairs);
+      data = this.__data__ = new MapCache(pairs);
     }
-    cache.set(key, value);
+    data.set(key, value);
+    this.size = data.size;
     return this;
   }
 

_strictIndexOf.js

@@ -0,0 +1,26 @@
+define([], function() {
+
+  /**
+   * A specialized version of `_.indexOf` which performs strict equality
+   * comparisons of values, i.e. `===`.
+   *
+   * @private
+   * @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 strictIndexOf(array, value, fromIndex) {
+    var index = fromIndex - 1,
+        length = array.length;
+
+    while (++index < length) {
+      if (array[index] === value) {
+        return index;
+      }
+    }
+    return -1;
+  }
+
+  return strictIndexOf;
+});

_strictLastIndexOf.js

@@ -0,0 +1,24 @@
+define([], function() {
+
+  /**
+   * A specialized version of `_.lastIndexOf` which performs strict equality
+   * comparisons of values, i.e. `===`.
+   *
+   * @private
+   * @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 strictLastIndexOf(array, value, fromIndex) {
+    var index = fromIndex + 1;
+    while (index--) {
+      if (array[index] === value) {
+        return index;
+      }
+    }
+    return index;
+  }
+
+  return strictLastIndexOf;
+});

_stringSize.js

@@ -1,30 +1,4 @@
-define(['./_reHasComplexSymbol'], function(reHasComplexSymbol) {
-
-  /** Used to compose unicode character classes. */
-  var rsAstralRange = '\\ud800-\\udfff',
-      rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23',
-      rsComboSymbolsRange = '\\u20d0-\\u20f0',
-      rsVarRange = '\\ufe0e\\ufe0f';
-
-  /** Used to compose unicode capture groups. */
-  var rsAstral = '[' + rsAstralRange + ']',
-      rsCombo = '[' + rsComboMarksRange + rsComboSymbolsRange + ']',
-      rsFitz = '\\ud83c[\\udffb-\\udfff]',
-      rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
-      rsNonAstral = '[^' + rsAstralRange + ']',
-      rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
-      rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
-      rsZWJ = '\\u200d';
-
-  /** Used to compose unicode regexes. */
-  var reOptMod = rsModifier + '?',
-      rsOptVar = '[' + rsVarRange + ']?',
-      rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
-      rsSeq = rsOptVar + reOptMod + rsOptJoin,
-      rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
-
-  /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
-  var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
+define(['./_asciiSize', './_hasUnicode', './_unicodeSize'], function(asciiSize, hasUnicode, unicodeSize) {
 
   /**
    * Gets the number of symbols in `string`.
@@ -34,14 +8,9 @@ define(['./_reHasComplexSymbol'], function(reHasComplexSymbol) {
    * @returns {number} Returns the string size.
    */
   function stringSize(string) {
-    if (!(string && reHasComplexSymbol.test(string))) {
-      return string.length;
-    }
-    var result = reComplexSymbol.lastIndex = 0;
-    while (reComplexSymbol.test(string)) {
-      result++;
-    }
-    return result;
+    return hasUnicode(string)
+      ? unicodeSize(string)
+      : asciiSize(string);
   }
 
   return stringSize;

_stringToArray.js

@@ -1,30 +1,4 @@
-define([], function() {
-
-  /** Used to compose unicode character classes. */
-  var rsAstralRange = '\\ud800-\\udfff',
-      rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23',
-      rsComboSymbolsRange = '\\u20d0-\\u20f0',
-      rsVarRange = '\\ufe0e\\ufe0f';
-
-  /** Used to compose unicode capture groups. */
-  var rsAstral = '[' + rsAstralRange + ']',
-      rsCombo = '[' + rsComboMarksRange + rsComboSymbolsRange + ']',
-      rsFitz = '\\ud83c[\\udffb-\\udfff]',
-      rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
-      rsNonAstral = '[^' + rsAstralRange + ']',
-      rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
-      rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
-      rsZWJ = '\\u200d';
-
-  /** Used to compose unicode regexes. */
-  var reOptMod = rsModifier + '?',
-      rsOptVar = '[' + rsVarRange + ']?',
-      rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
-      rsSeq = rsOptVar + reOptMod + rsOptJoin,
-      rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
-
-  /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
-  var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
+define(['./_asciiToArray', './_hasUnicode', './_unicodeToArray'], function(asciiToArray, hasUnicode, unicodeToArray) {
 
   /**
    * Converts `string` to an array.
@@ -34,7 +8,9 @@ define([], function() {
    * @returns {Array} Returns the converted array.
    */
   function stringToArray(string) {
-    return string.match(reComplexSymbol);
+    return hasUnicode(string)
+      ? unicodeToArray(string)
+      : asciiToArray(string);
   }
 
   return stringToArray;

_stringToPath.js

@@ -1,7 +1,8 @@
-define(['./memoize', './toString'], function(memoize, toString) {
+define(['./_memoizeCapped', './toString'], function(memoizeCapped, toString) {
 
   /** Used to match property names within property paths. */
-  var rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+  var reLeadingDot = /^\./,
+      rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;
 
   /** Used to match backslashes in property paths. */
   var reEscapeChar = /\\(\\)?/g;
@@ -13,9 +14,14 @@ define(['./memoize', './toString'], function(memoize, toString) {
    * @param {string} string The string to convert.
    * @returns {Array} Returns the property path array.
    */
-  var stringToPath = memoize(function(string) {
+  var stringToPath = memoizeCapped(function(string) {
+    string = toString(string);
+
     var result = [];
-    toString(string).replace(rePropName, function(match, number, quote, string) {
+    if (reLeadingDot.test(string)) {
+      result.push('');
+    }
+    string.replace(rePropName, function(match, number, quote, string) {
       result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
     });
     return result;

_toSource.js

@@ -1,7 +1,10 @@
 define([], function() {
 
+  /** Used for built-in method references. */
+  var funcProto = Function.prototype;
+
   /** Used to resolve the decompiled source of functions. */
-  var funcToString = Function.prototype.toString;
+  var funcToString = funcProto.toString;
 
   /**
    * Converts `func` to its source code.

_unescapeHtmlChar.js

@@ -6,8 +6,7 @@ define(['./_basePropertyOf'], function(basePropertyOf) {
     '&lt;': '<',
     '&gt;': '>',
     '&quot;': '"',
-    '&#39;': "'",
-    '&#96;': '`'
+    '&#39;': "'"
   };
 
   /**