Bump to v4.16.6.

LICENSE

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

README.md

@@ -1,12 +1,12 @@
-# lodash v4.14.2
+# lodash v4.16.6
 
 The [Lodash](https://lodash.com/) library exported as [Node.js](https://nodejs.org/) modules.
 
 ## Installation
 
 Using npm:
-```bash
-$ {sudo -H} npm i -g npm
+```shell
+$ npm i -g npm
 $ npm i --save lodash
 ```
 
@@ -16,25 +16,24 @@ In Node.js:
 var _ = require('lodash');
 // 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 fp = require('lodash/fp');
 
-// Load a method category.
+// Load method categories.
 var array = require('lodash/array');
 var object = require('lodash/fp/object');
 
-// Load a single method for smaller builds with browserify/rollup/webpack.
-var chunk = require('lodash/chunk');
-var extend = require('lodash/fp/extend');
+// Cherry-pick methods for smaller browserify/rollup/webpack bundles.
+var at = require('lodash/at');
+var curryN = require('lodash/fp/curryN');
 ```
 
-See the [package source](https://github.com/lodash/lodash/tree/4.14.2-npm) for more details.
+See the [package source](https://github.com/lodash/lodash/tree/4.16.6-npm) for more details.
 
 **Note:**<br>
-Don’t assign values to the [special variable](http://nodejs.org/api/repl.html#repl_repl_features) `_` in the Node.js < 6 REPL.<br>
-Install [n_](https://www.npmjs.com/package/n_) for a REPL that includes `lodash` by default.
+Install [n_](https://www.npmjs.com/package/n_) for Lodash use in the Node.js < 6 REPL.
 
 ## Support
 
-Tested in Chrome 51-52, Firefox 47-48, IE 9-11, Edge 14, Safari 8-9, Node.js 0.10-6, & PhantomJS 2.1.1.<br>
+Tested in Chrome 53-54, Firefox 48-49, IE 11, Edge 14, Safari 9-10, Node.js 6-7, & PhantomJS 2.1.1.<br>
 Automated [browser](https://saucelabs.com/u/lodash) & [CI](https://travis-ci.org/lodash/lodash/) test runs are available.

_Hash.js

@@ -13,7 +13,7 @@ var hashClear = require('./_hashClear'),
  */
 function Hash(entries) {
   var index = -1,
-      length = entries ? entries.length : 0;
+      length = entries == null ? 0 : entries.length;
 
   this.clear();
   while (++index < length) {

_ListCache.js

@@ -13,7 +13,7 @@ var listCacheClear = require('./_listCacheClear'),
  */
 function ListCache(entries) {
   var index = -1,
-      length = entries ? entries.length : 0;
+      length = entries == null ? 0 : entries.length;
 
   this.clear();
   while (++index < length) {

_MapCache.js

@@ -13,7 +13,7 @@ var mapCacheClear = require('./_mapCacheClear'),
  */
 function MapCache(entries) {
   var index = -1,
-      length = entries ? entries.length : 0;
+      length = entries == null ? 0 : entries.length;
 
   this.clear();
   while (++index < length) {

_SetCache.js

@@ -12,7 +12,7 @@ var MapCache = require('./_MapCache'),
  */
 function SetCache(values) {
   var index = -1,
-      length = values ? values.length : 0;
+      length = values == null ? 0 : values.length;
 
   this.__data__ = new MapCache;
   while (++index < length) {

_Stack.js

@@ -13,7 +13,8 @@ var ListCache = require('./_ListCache'),
  * @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`.

_arrayAggregator.js

@@ -10,7 +10,7 @@
  */
 function arrayAggregator(array, setter, iteratee, accumulator) {
   var index = -1,
-      length = array ? array.length : 0;
+      length = array == null ? 0 : array.length;
 
   while (++index < length) {
     var value = array[index];

_arrayEach.js

@@ -9,7 +9,7 @@
  */
 function arrayEach(array, iteratee) {
   var index = -1,
-      length = array ? array.length : 0;
+      length = array == null ? 0 : array.length;
 
   while (++index < length) {
     if (iteratee(array[index], index, array) === false) {

_arrayEachRight.js

@@ -8,7 +8,7 @@
  * @returns {Array} Returns `array`.
  */
 function arrayEachRight(array, iteratee) {
-  var length = array ? array.length : 0;
+  var length = array == null ? 0 : array.length;
 
   while (length--) {
     if (iteratee(array[length], length, array) === false) {

_arrayEvery.js

@@ -10,7 +10,7 @@
  */
 function arrayEvery(array, predicate) {
   var index = -1,
-      length = array ? array.length : 0;
+      length = array == null ? 0 : array.length;
 
   while (++index < length) {
     if (!predicate(array[index], index, array)) {

_arrayFilter.js

@@ -9,7 +9,7 @@
  */
 function arrayFilter(array, predicate) {
   var index = -1,
-      length = array ? array.length : 0,
+      length = array == null ? 0 : array.length,
       resIndex = 0,
       result = [];
 

_arrayIncludes.js

@@ -5,12 +5,12 @@ var baseIndexOf = require('./_baseIndexOf');
  * specifying an index to search from.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
  */
 function arrayIncludes(array, value) {
-  var length = array ? array.length : 0;
+  var length = array == null ? 0 : array.length;
   return !!length && baseIndexOf(array, value, 0) > -1;
 }
 

_arrayIncludesWith.js

@@ -2,14 +2,14 @@
  * This function is like `arrayIncludes` except that it accepts a comparator.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @param {Function} comparator The comparator invoked per element.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
  */
 function arrayIncludesWith(array, value, comparator) {
   var index = -1,
-      length = array ? array.length : 0;
+      length = array == null ? 0 : array.length;
 
   while (++index < length) {
     if (comparator(value, array[index])) {

_arrayLikeKeys.js

@@ -1,8 +1,9 @@
 var baseTimes = require('./_baseTimes'),
     isArguments = require('./isArguments'),
     isArray = require('./isArray'),
+    isBuffer = require('./isBuffer'),
     isIndex = require('./_isIndex'),
-    isString = require('./isString');
+    isTypedArray = require('./isTypedArray');
 
 /** Used for built-in method references. */
 var objectProto = Object.prototype;
@@ -19,16 +20,26 @@ var hasOwnProperty = objectProto.hasOwnProperty;
  * @returns {Array} Returns the array of property names.
  */
 function arrayLikeKeys(value, inherited) {
-  var result = (isArray(value) || isString(value) || isArguments(value))
-    ? baseTimes(value.length, String)
-    : [];
-
-  var length = result.length,
-      skipIndexes = !!length;
+  var isArr = isArray(value),
+      isArg = !isArr && isArguments(value),
+      isBuff = !isArr && !isArg && isBuffer(value),
+      isType = !isArr && !isArg && !isBuff && isTypedArray(value),
+      skipIndexes = isArr || isArg || isBuff || isType,
+      result = skipIndexes ? baseTimes(value.length, String) : [],
+      length = result.length;
 
   for (var key in value) {
     if ((inherited || hasOwnProperty.call(value, key)) &&
-        !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+        !(skipIndexes && (
+           // Safari 9 has enumerable `arguments.length` in strict mode.
+           key == 'length' ||
+           // Node.js 0.10 has enumerable non-index properties on buffers.
+           (isBuff && (key == 'offset' || key == 'parent')) ||
+           // PhantomJS 2 has enumerable non-index properties on typed arrays.
+           (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
+           // Skip index properties.
+           isIndex(key, length)
+        ))) {
       result.push(key);
     }
   }

_arrayMap.js

@@ -9,7 +9,7 @@
  */
 function arrayMap(array, iteratee) {
   var index = -1,
-      length = array ? array.length : 0,
+      length = array == null ? 0 : array.length,
       result = Array(length);
 
   while (++index < length) {

_arrayReduce.js

@@ -12,7 +12,7 @@
  */
 function arrayReduce(array, iteratee, accumulator, initAccum) {
   var index = -1,
-      length = array ? array.length : 0;
+      length = array == null ? 0 : array.length;
 
   if (initAccum && length) {
     accumulator = array[++index];

_arrayReduceRight.js

@@ -11,7 +11,7 @@
  * @returns {*} Returns the accumulated value.
  */
 function arrayReduceRight(array, iteratee, accumulator, initAccum) {
-  var length = array ? array.length : 0;
+  var length = array == null ? 0 : array.length;
   if (initAccum && length) {
     accumulator = array[--length];
   }

_arraySample.js

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

_arraySampleSize.js

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

_arrayShuffle.js

@@ -0,0 +1,15 @@
+var copyArray = require('./_copyArray'),
+    shuffleSelf = require('./_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));
+}
+
+module.exports = arrayShuffle;

_arraySome.js

@@ -10,7 +10,7 @@
  */
 function arraySome(array, predicate) {
   var index = -1,
-      length = array ? array.length : 0;
+      length = array == null ? 0 : array.length;
 
   while (++index < length) {
     if (predicate(array[index], index, array)) {

_asciiSize.js

@@ -0,0 +1,12 @@
+var baseProperty = require('./_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');
+
+module.exports = asciiSize;

_asciiToArray.js

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

_asciiWords.js

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

_assignMergeValue.js

@@ -1,4 +1,5 @@
-var eq = require('./eq');
+var baseAssignValue = require('./_baseAssignValue'),
+    eq = require('./eq');
 
 /**
  * This function is like `assignValue` except that it doesn't assign
@@ -11,8 +12,8 @@ var eq = require('./eq');
  */
 function assignMergeValue(object, key, value) {
   if ((value !== undefined && !eq(object[key], value)) ||
-      (typeof key == 'number' && value === undefined && !(key in object))) {
-    object[key] = value;
+      (value === undefined && !(key in object))) {
+    baseAssignValue(object, key, value);
   }
 }
 

_assignValue.js

@@ -1,4 +1,5 @@
-var eq = require('./eq');
+var baseAssignValue = require('./_baseAssignValue'),
+    eq = require('./eq');
 
 /** Used for built-in method references. */
 var objectProto = Object.prototype;
@@ -20,7 +21,7 @@ function assignValue(object, key, value) {
   var objValue = object[key];
   if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
       (value === undefined && !(key in object))) {
-    object[key] = value;
+    baseAssignValue(object, key, value);
   }
 }
 

_assocIndexOf.js

@@ -4,7 +4,7 @@ var eq = require('./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 +1,25 @@
+var defineProperty = require('./_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;
+  }
+}
+
+module.exports = baseAssignValue;

_baseAt.js

@@ -10,12 +10,12 @@ var get = require('./get');
  */
 function baseAt(object, paths) {
   var index = -1,
-      isNil = object == null,
       length = paths.length,
-      result = Array(length);
+      result = Array(length),
+      skip = object == null;
 
   while (++index < length) {
-    result[index] = isNil ? undefined : get(object, paths[index]);
+    result[index] = skip ? undefined : get(object, paths[index]);
   }
   return result;
 }

_baseClone.js

@@ -12,7 +12,6 @@ var Stack = require('./_Stack'),
     initCloneObject = require('./_initCloneObject'),
     isArray = require('./isArray'),
     isBuffer = require('./isBuffer'),
-    isHostObject = require('./_isHostObject'),
     isObject = require('./isObject'),
     keys = require('./keys');
 
@@ -100,9 +99,6 @@ function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
       return cloneBuffer(value, isDeep);
     }
     if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
-      if (isHostObject(value)) {
-        return object ? value : {};
-      }
       result = initCloneObject(isFunc ? {} : value);
       if (!isDeep) {
         return copySymbols(value, baseAssign(result, value));
@@ -122,9 +118,7 @@ function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
   }
   stack.set(value, result);
 
-  if (!isArr) {
-    var props = isFull ? getAllKeys(value) : keys(value);
-  }
+  var props = isArr ? undefined : (isFull ? getAllKeys : keys)(value);
   arrayEach(props || value, function(subValue, key) {
     if (props) {
       key = subValue;

_baseCreate.js

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

_baseDelay.js

@@ -1,4 +1,4 @@
-/** Used as the `TypeError` message for "Functions" methods. */
+/** Error message constants. */
 var FUNC_ERROR_TEXT = 'Expected a function';
 
 /**

_baseDifference.js

@@ -45,7 +45,7 @@ function baseDifference(array, values, iteratee, comparator) {
   outer:
   while (++index < length) {
     var value = array[index],
-        computed = iteratee ? iteratee(value) : value;
+        computed = iteratee == null ? value : iteratee(value);
 
     value = (comparator || value !== 0) ? value : 0;
     if (isCommon && computed === computed) {

_baseFindIndex.js

@@ -3,7 +3,7 @@
  * support for iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {Function} predicate The function invoked per iteration.
  * @param {number} fromIndex The index to search from.
  * @param {boolean} [fromRight] Specify iterating from right to left.

_baseFindKey.js

@@ -4,7 +4,7 @@
  * using `eachFunc`.
  *
  * @private
- * @param {Array|Object} collection The collection to search.
+ * @param {Array|Object} collection The collection to inspect.
  * @param {Function} predicate The function invoked per iteration.
  * @param {Function} eachFunc The function to iterate over `collection`.
  * @returns {*} Returns the found element or its key, else `undefined`.

_baseGetTag.js

@@ -1,22 +1,29 @@
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
+var Symbol = require('./_Symbol'),
+    getRawTag = require('./_getRawTag'),
+    objectToString = require('./_objectToString');
+
+/** `Object#toString` result references. */
+var nullTag = '[object Null]',
+    undefinedTag = '[object Undefined]';
+
+/** Built-in value references. */
+var symToStringTag = Symbol ? Symbol.toStringTag : undefined;
 
 /**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
- * of values.
- */
-var objectToString = objectProto.toString;
-
-/**
- * The base implementation of `getTag`.
+ * The base implementation of `getTag` without fallbacks for buggy environments.
  *
  * @private
  * @param {*} value The value to query.
  * @returns {string} Returns the `toStringTag`.
  */
 function baseGetTag(value) {
-  return objectToString.call(value);
+  if (value == null) {
+    return value === undefined ? undefinedTag : nullTag;
+  }
+  value = Object(value);
+  return (symToStringTag && symToStringTag in value)
+    ? getRawTag(value)
+    : objectToString(value);
 }
 
 module.exports = baseGetTag;

_baseIndexOf.js

@@ -1,28 +1,20 @@
 var baseFindIndex = require('./_baseFindIndex'),
-    baseIsNaN = require('./_baseIsNaN');
+    baseIsNaN = require('./_baseIsNaN'),
+    strictIndexOf = require('./_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);
 }
 
 module.exports = baseIndexOf;

_baseIndexOfWith.js

@@ -2,7 +2,7 @@
  * This function is like `baseIndexOf` except that it accepts a comparator.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} value The value to search for.
  * @param {number} fromIndex The index to search from.
  * @param {Function} comparator The comparator invoked per element.

_baseIsArguments.js

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

_baseIsArrayBuffer.js

@@ -1,17 +1,8 @@
-var isObjectLike = require('./isObjectLike');
+var baseGetTag = require('./_baseGetTag'),
+    isObjectLike = require('./isObjectLike');
 
 var arrayBufferTag = '[object ArrayBuffer]';
 
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
-
-/**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
- * of values.
- */
-var objectToString = objectProto.toString;
-
 /**
  * The base implementation of `_.isArrayBuffer` without Node.js optimizations.
  *
@@ -20,7 +11,7 @@ var objectToString = objectProto.toString;
  * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
  */
 function baseIsArrayBuffer(value) {
-  return isObjectLike(value) && objectToString.call(value) == arrayBufferTag;
+  return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;
 }
 
 module.exports = baseIsArrayBuffer;

_baseIsDate.js

@@ -1,18 +1,9 @@
-var isObjectLike = require('./isObjectLike');
+var baseGetTag = require('./_baseGetTag'),
+    isObjectLike = require('./isObjectLike');
 
 /** `Object#toString` result references. */
 var dateTag = '[object Date]';
 
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
-
-/**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
- * of values.
- */
-var objectToString = objectProto.toString;
-
 /**
  * The base implementation of `_.isDate` without Node.js optimizations.
  *
@@ -21,7 +12,7 @@ var objectToString = objectProto.toString;
  * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
  */
 function baseIsDate(value) {
-  return isObjectLike(value) && objectToString.call(value) == dateTag;
+  return isObjectLike(value) && baseGetTag(value) == dateTag;
 }
 
 module.exports = baseIsDate;

_baseIsEqualDeep.js

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

_baseIsNative.js

@@ -1,5 +1,4 @@
 var isFunction = require('./isFunction'),
-    isHostObject = require('./_isHostObject'),
     isMasked = require('./_isMasked'),
     isObject = require('./isObject'),
     toSource = require('./_toSource');
@@ -14,10 +13,11 @@ var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 var reIsHostCtor = /^\[object .+?Constructor\]$/;
 
 /** Used for built-in method references. */
-var objectProto = Object.prototype;
+var funcProto = Function.prototype,
+    objectProto = Object.prototype;
 
 /** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
+var funcToString = funcProto.toString;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
@@ -40,7 +40,7 @@ function baseIsNative(value) {
   if (!isObject(value) || isMasked(value)) {
     return false;
   }
-  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
   return pattern.test(toSource(value));
 }
 

_baseIsRegExp.js

@@ -1,18 +1,9 @@
-var isObject = require('./isObject');
+var baseGetTag = require('./_baseGetTag'),
+    isObjectLike = require('./isObjectLike');
 
 /** `Object#toString` result references. */
 var regexpTag = '[object RegExp]';
 
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
-
-/**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
- * of values.
- */
-var objectToString = objectProto.toString;
-
 /**
  * The base implementation of `_.isRegExp` without Node.js optimizations.
  *
@@ -21,7 +12,7 @@ var objectToString = objectProto.toString;
  * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
  */
 function baseIsRegExp(value) {
-  return isObject(value) && objectToString.call(value) == regexpTag;
+  return isObjectLike(value) && baseGetTag(value) == regexpTag;
 }
 
 module.exports = baseIsRegExp;

_baseIsTypedArray.js

@@ -1,4 +1,5 @@
-var isLength = require('./isLength'),
+var baseGetTag = require('./_baseGetTag'),
+    isLength = require('./isLength'),
     isObjectLike = require('./isObjectLike');
 
 /** `Object#toString` result references. */
@@ -44,16 +45,6 @@ typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
 typedArrayTags[setTag] = typedArrayTags[stringTag] =
 typedArrayTags[weakMapTag] = false;
 
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
-
-/**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
- * of values.
- */
-var objectToString = objectProto.toString;
-
 /**
  * The base implementation of `_.isTypedArray` without Node.js optimizations.
  *
@@ -63,7 +54,7 @@ var objectToString = objectProto.toString;
  */
 function baseIsTypedArray(value) {
   return isObjectLike(value) &&
-    isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+    isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
 }
 
 module.exports = baseIsTypedArray;

_baseMean.js

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

_baseMerge.js

@@ -1,11 +1,9 @@
 var Stack = require('./_Stack'),
-    arrayEach = require('./_arrayEach'),
     assignMergeValue = require('./_assignMergeValue'),
-    baseKeysIn = require('./_baseKeysIn'),
+    baseFor = require('./_baseFor'),
     baseMergeDeep = require('./_baseMergeDeep'),
-    isArray = require('./isArray'),
     isObject = require('./isObject'),
-    isTypedArray = require('./isTypedArray');
+    keysIn = require('./keysIn');
 
 /**
  * The base implementation of `_.merge` without support for multiple sources.
@@ -22,14 +20,7 @@ function baseMerge(object, source, srcIndex, customizer, stack) {
   if (object === source) {
     return;
   }
-  if (!(isArray(source) || isTypedArray(source))) {
-    var props = baseKeysIn(source);
-  }
-  arrayEach(props || source, function(srcValue, key) {
-    if (props) {
-      key = srcValue;
-      srcValue = source[key];
-    }
+  baseFor(source, function(srcValue, key) {
     if (isObject(srcValue)) {
       stack || (stack = new Stack);
       baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
@@ -44,7 +35,7 @@ function baseMerge(object, source, srcIndex, customizer, stack) {
       }
       assignMergeValue(object, key, newValue);
     }
-  });
+  }, keysIn);
 }
 
 module.exports = baseMerge;

_baseMergeDeep.js

@@ -1,9 +1,12 @@
 var assignMergeValue = require('./_assignMergeValue'),
-    baseClone = require('./_baseClone'),
+    cloneBuffer = require('./_cloneBuffer'),
+    cloneTypedArray = require('./_cloneTypedArray'),
     copyArray = require('./_copyArray'),
+    initCloneObject = require('./_initCloneObject'),
     isArguments = require('./isArguments'),
     isArray = require('./isArray'),
     isArrayLikeObject = require('./isArrayLikeObject'),
+    isBuffer = require('./isBuffer'),
     isFunction = require('./isFunction'),
     isObject = require('./isObject'),
     isPlainObject = require('./isPlainObject'),
@@ -41,29 +44,37 @@ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, sta
   var isCommon = newValue === undefined;
 
   if (isCommon) {
+    var isArr = isArray(srcValue),
+        isBuff = !isArr && isBuffer(srcValue),
+        isTyped = !isArr && !isBuff && isTypedArray(srcValue);
+
     newValue = srcValue;
-    if (isArray(srcValue) || isTypedArray(srcValue)) {
+    if (isArr || isBuff || isTyped) {
       if (isArray(objValue)) {
         newValue = objValue;
       }
       else if (isArrayLikeObject(objValue)) {
         newValue = copyArray(objValue);
       }
-      else {
+      else if (isBuff) {
         isCommon = false;
-        newValue = baseClone(srcValue, true);
+        newValue = cloneBuffer(srcValue, true);
+      }
+      else if (isTyped) {
+        isCommon = false;
+        newValue = cloneTypedArray(srcValue, true);
+      }
+      else {
+        newValue = [];
       }
     }
     else if (isPlainObject(srcValue) || isArguments(srcValue)) {
+      newValue = objValue;
       if (isArguments(objValue)) {
         newValue = toPlainObject(objValue);
       }
       else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
-        isCommon = false;
-        newValue = baseClone(srcValue, true);
-      }
-      else {
-        newValue = objValue;
+        newValue = initCloneObject(srcValue);
       }
     }
     else {

_basePickBy.js

@@ -1,3 +1,5 @@
+var baseAssignValue = require('./_baseAssignValue');
+
 /**
  * The base implementation of  `_.pickBy` without support for iteratee shorthands.
  *
@@ -17,7 +19,7 @@ function basePickBy(object, props, predicate) {
         value = object[key];
 
     if (predicate(value, key)) {
-      result[key] = value;
+      baseAssignValue(result, key, value);
     }
   }
   return result;

_baseRest.js

@@ -1,7 +1,6 @@
-var apply = require('./_apply');
-
-/* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeMax = Math.max;
+var identity = require('./identity'),
+    overRest = require('./_overRest'),
+    setToString = require('./_setToString');
 
 /**
  * The base implementation of `_.rest` which doesn't validate or coerce arguments.
@@ -12,24 +11,7 @@ var nativeMax = Math.max;
  * @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 + '');
 }
 
 module.exports = baseRest;

_baseSample.js

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

_baseSampleSize.js

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

_baseSet.js

@@ -9,7 +9,7 @@ var assignValue = require('./_assignValue'),
  * 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.

_baseSetData.js

@@ -2,7 +2,7 @@ var identity = require('./identity'),
     metaMap = require('./_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 +1,22 @@
+var constant = require('./constant'),
+    defineProperty = require('./_defineProperty'),
+    identity = require('./identity');
+
+/**
+ * The base implementation of `setToString` without support for hot loop shorting.
+ *
+ * @private
+ * @param {Function} func The function to modify.
+ * @param {Function} string The `toString` result.
+ * @returns {Function} Returns `func`.
+ */
+var baseSetToString = !defineProperty ? identity : function(func, string) {
+  return defineProperty(func, 'toString', {
+    'configurable': true,
+    'enumerable': false,
+    'value': constant(string),
+    'writable': true
+  });
+};
+
+module.exports = baseSetToString;

_baseShuffle.js

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

_baseSortedIndex.js

@@ -20,7 +20,7 @@ var MAX_ARRAY_LENGTH = 4294967295,
  */
 function baseSortedIndex(array, value, retHighest) {
   var low = 0,
-      high = array ? array.length : low;
+      high = array == null ? low : array.length;
 
   if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
     while (low < high) {

_baseSortedIndexBy.js

@@ -25,7 +25,7 @@ function baseSortedIndexBy(array, value, iteratee, retHighest) {
   value = iteratee(value);
 
   var low = 0,
-      high = array ? array.length : 0,
+      high = array == null ? 0 : array.length,
       valIsNaN = value !== value,
       valIsNull = value === null,
       valIsSymbol = isSymbol(value),

_baseToString.js

@@ -1,4 +1,6 @@
 var Symbol = require('./_Symbol'),
+    arrayMap = require('./_arrayMap'),
+    isArray = require('./isArray'),
     isSymbol = require('./isSymbol');
 
 /** Used as references for various `Number` constants. */
@@ -21,6 +23,10 @@ function baseToString(value) {
   if (typeof value == 'string') {
     return value;
   }
+  if (isArray(value)) {
+    // Recursively convert values (susceptible to call stack limits).
+    return arrayMap(value, baseToString) + '';
+  }
   if (isSymbol(value)) {
     return symbolToString ? symbolToString.call(value) : '';
   }

_baseUpdate.js

@@ -5,7 +5,7 @@ var baseGet = require('./_baseGet'),
  * The base implementation of `_.update`.
  *
  * @private
- * @param {Object} object The object to query.
+ * @param {Object} object The object to modify.
  * @param {Array|string} path The path of the property to update.
  * @param {Function} updater The function to produce the updated value.
  * @param {Function} [customizer] The function to customize path creation.

_baseXor.js

@@ -1,5 +1,5 @@
-var arrayPush = require('./_arrayPush'),
-    baseDifference = require('./_baseDifference'),
+var baseDifference = require('./_baseDifference'),
+    baseFlatten = require('./_baseFlatten'),
     baseUniq = require('./_baseUniq');
 
 /**
@@ -13,18 +13,24 @@ var arrayPush = require('./_arrayPush'),
  * @returns {Array} Returns the new array of values.
  */
 function baseXor(arrays, iteratee, comparator) {
+  var length = arrays.length;
+  if (length < 2) {
+    return length ? baseUniq(arrays[0]) : [];
+  }
   var index = -1,
-      length = arrays.length;
+      result = Array(length);
 
   while (++index < length) {
-    var result = result
-      ? arrayPush(
-          baseDifference(result, arrays[index], iteratee, comparator),
-          baseDifference(arrays[index], result, iteratee, comparator)
-        )
-      : arrays[index];
+    var array = arrays[index],
+        othIndex = -1;
+
+    while (++othIndex < length) {
+      if (othIndex != index) {
+        result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
+      }
+    }
   }
-  return (result && result.length) ? baseUniq(result, iteratee, comparator) : [];
+  return baseUniq(baseFlatten(result, 1), iteratee, comparator);
 }
 
 module.exports = baseXor;

_cacheHas.js

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

_castRest.js

@@ -0,0 +1,14 @@
+var baseRest = require('./_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;
+
+module.exports = castRest;

_cloneBuffer.js

@@ -1,3 +1,18 @@
+var root = require('./_root');
+
+/** Detect free variable `exports`. */
+var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
+
+/** Detect free variable `module`. */
+var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Built-in value references. */
+var Buffer = moduleExports ? root.Buffer : undefined,
+    allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined;
+
 /**
  * Creates a clone of  `buffer`.
  *
@@ -10,7 +25,9 @@ function cloneBuffer(buffer, isDeep) {
   if (isDeep) {
     return buffer.slice();
   }
-  var result = new buffer.constructor(buffer.length);
+  var length = buffer.length,
+      result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);
+
   buffer.copy(result);
   return result;
 }

_copyObject.js

@@ -1,4 +1,5 @@
-var assignValue = require('./_assignValue');
+var assignValue = require('./_assignValue'),
+    baseAssignValue = require('./_baseAssignValue');
 
 /**
  * Copies properties of `source` to `object`.
@@ -11,6 +12,7 @@ var assignValue = require('./_assignValue');
  * @returns {Object} Returns `object`.
  */
 function copyObject(source, props, object, customizer) {
+  var isNew = !object;
   object || (object = {});
 
   var index = -1,
@@ -23,7 +25,14 @@ function copyObject(source, props, object, customizer) {
       ? 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

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

_createCaseFirst.js

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

_createFlow.js

@@ -1,6 +1,5 @@
 var LodashWrapper = require('./_LodashWrapper'),
-    baseFlatten = require('./_baseFlatten'),
-    baseRest = require('./_baseRest'),
+    flatRest = require('./_flatRest'),
     getData = require('./_getData'),
     getFuncName = require('./_getFuncName'),
     isArray = require('./isArray'),
@@ -9,7 +8,7 @@ var LodashWrapper = require('./_LodashWrapper'),
 /** Used as the size to enable large array optimizations. */
 var LARGE_ARRAY_SIZE = 200;
 
-/** Used as the `TypeError` message for "Functions" methods. */
+/** Error message constants. */
 var FUNC_ERROR_TEXT = 'Expected a function';
 
 /** Used to compose bitmasks for function metadata. */
@@ -26,9 +25,7 @@ var CURRY_FLAG = 8,
  * @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

@@ -1,10 +1,9 @@
 var apply = require('./_apply'),
     arrayMap = require('./_arrayMap'),
-    baseFlatten = require('./_baseFlatten'),
     baseIteratee = require('./_baseIteratee'),
     baseRest = require('./_baseRest'),
     baseUnary = require('./_baseUnary'),
-    isArray = require('./isArray');
+    flatRest = require('./_flatRest');
 
 /**
  * Creates a function like `_.over`.
@@ -14,11 +13,8 @@ var apply = require('./_apply'),
  * @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

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

_createWrap.js

@@ -9,7 +9,7 @@ var baseSetData = require('./_baseSetData'),
     setWrapToString = require('./_setWrapToString'),
     toInteger = require('./toInteger');
 
-/** Used as the `TypeError` message for "Functions" methods. */
+/** Error message constants. */
 var FUNC_ERROR_TEXT = 'Expected a function';
 
 /** Used to compose bitmasks for function metadata. */

_deburrLetter.js

@@ -1,15 +1,16 @@
 var basePropertyOf = require('./_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 @@ var deburredLetters = {
   '\xdd': 'Y',  '\xfd': 'y', '\xff': 'y',
   '\xc6': 'Ae', '\xe6': 'ae',
   '\xde': 'Th', '\xfe': 'th',
-  '\xdf': 'ss'
+  '\xdf': 'ss',
+  // Latin Extended-A block.
+  '\u0100': 'A',  '\u0102': 'A', '\u0104': 'A',
+  '\u0101': 'a',  '\u0103': 'a', '\u0105': 'a',
+  '\u0106': 'C',  '\u0108': 'C', '\u010a': 'C', '\u010c': 'C',
+  '\u0107': 'c',  '\u0109': 'c', '\u010b': 'c', '\u010d': 'c',
+  '\u010e': 'D',  '\u0110': 'D', '\u010f': 'd', '\u0111': 'd',
+  '\u0112': 'E',  '\u0114': 'E', '\u0116': 'E', '\u0118': 'E', '\u011a': 'E',
+  '\u0113': 'e',  '\u0115': 'e', '\u0117': 'e', '\u0119': 'e', '\u011b': 'e',
+  '\u011c': 'G',  '\u011e': 'G', '\u0120': 'G', '\u0122': 'G',
+  '\u011d': 'g',  '\u011f': 'g', '\u0121': 'g', '\u0123': 'g',
+  '\u0124': 'H',  '\u0126': 'H', '\u0125': 'h', '\u0127': 'h',
+  '\u0128': 'I',  '\u012a': 'I', '\u012c': 'I', '\u012e': 'I', '\u0130': 'I',
+  '\u0129': 'i',  '\u012b': 'i', '\u012d': 'i', '\u012f': 'i', '\u0131': 'i',
+  '\u0134': 'J',  '\u0135': 'j',
+  '\u0136': 'K',  '\u0137': 'k', '\u0138': 'k',
+  '\u0139': 'L',  '\u013b': 'L', '\u013d': 'L', '\u013f': 'L', '\u0141': 'L',
+  '\u013a': 'l',  '\u013c': 'l', '\u013e': 'l', '\u0140': 'l', '\u0142': 'l',
+  '\u0143': 'N',  '\u0145': 'N', '\u0147': 'N', '\u014a': 'N',
+  '\u0144': 'n',  '\u0146': 'n', '\u0148': 'n', '\u014b': 'n',
+  '\u014c': 'O',  '\u014e': 'O', '\u0150': 'O',
+  '\u014d': 'o',  '\u014f': 'o', '\u0151': 'o',
+  '\u0154': 'R',  '\u0156': 'R', '\u0158': 'R',
+  '\u0155': 'r',  '\u0157': 'r', '\u0159': 'r',
+  '\u015a': 'S',  '\u015c': 'S', '\u015e': 'S', '\u0160': 'S',
+  '\u015b': 's',  '\u015d': 's', '\u015f': 's', '\u0161': 's',
+  '\u0162': 'T',  '\u0164': 'T', '\u0166': 'T',
+  '\u0163': 't',  '\u0165': 't', '\u0167': 't',
+  '\u0168': 'U',  '\u016a': 'U', '\u016c': 'U', '\u016e': 'U', '\u0170': 'U', '\u0172': 'U',
+  '\u0169': 'u',  '\u016b': 'u', '\u016d': 'u', '\u016f': 'u', '\u0171': 'u', '\u0173': 'u',
+  '\u0174': 'W',  '\u0175': 'w',
+  '\u0176': 'Y',  '\u0177': 'y', '\u0178': 'Y',
+  '\u0179': 'Z',  '\u017b': 'Z', '\u017d': 'Z',
+  '\u017a': 'z',  '\u017c': 'z', '\u017e': 'z',
+  '\u0132': 'IJ', '\u0133': 'ij',
+  '\u0152': 'Oe', '\u0153': 'oe',
+  '\u0149': "'n", '\u017f': 's'
 };
 
 /**
- * Used by `_.deburr` to convert latin-1 supplementary letters to basic latin letters.
+ * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
+ * letters to basic Latin letters.
  *
  * @private
  * @param {string} letter The matched letter to deburr.

_defineProperty.js

@@ -1,11 +1,11 @@
 var getNative = require('./_getNative');
 
-/* Used to set `toString` methods. */
 var defineProperty = (function() {
-  var func = getNative(Object, 'defineProperty'),
-      name = getNative.name;
-
-  return (name && name.length > 2) ? func : undefined;
+  try {
+    var func = getNative(Object, 'defineProperty');
+    func({}, '', {});
+    return func;
+  } catch (e) {}
 }());
 
 module.exports = defineProperty;

_equalArrays.js

@@ -1,5 +1,6 @@
 var SetCache = require('./_SetCache'),
-    arraySome = require('./_arraySome');
+    arraySome = require('./_arraySome'),
+    cacheHas = require('./_cacheHas');
 
 /** Used to compose bitmasks for comparison styles. */
 var UNORDERED_COMPARE_FLAG = 1,
@@ -59,9 +60,9 @@ function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
     // Recursively compare arrays (susceptible to call stack limits).
     if (seen) {
       if (!arraySome(other, function(othValue, othIndex) {
-            if (!seen.has(othIndex) &&
+            if (!cacheHas(seen, othIndex) &&
                 (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
-              return seen.add(othIndex);
+              return seen.push(othIndex);
             }
           })) {
         result = false;

_escapeHtmlChar.js

@@ -6,8 +6,7 @@ var htmlEscapes = {
   '<': '&lt;',
   '>': '&gt;',
   '"': '&quot;',
-  "'": '&#39;',
-  '`': '&#96;'
+  "'": '&#39;'
 };
 
 /**

_flatRest.js

@@ -0,0 +1,16 @@
+var flatten = require('./flatten'),
+    overRest = require('./_overRest'),
+    setToString = require('./_setToString');
+
+/**
+ * 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 + '');
+}
+
+module.exports = flatRest;

_getRawTag.js

@@ -0,0 +1,46 @@
+var Symbol = require('./_Symbol');
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var nativeObjectToString = objectProto.toString;
+
+/** Built-in value references. */
+var symToStringTag = Symbol ? Symbol.toStringTag : undefined;
+
+/**
+ * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the raw `toStringTag`.
+ */
+function getRawTag(value) {
+  var isOwn = hasOwnProperty.call(value, symToStringTag),
+      tag = value[symToStringTag];
+
+  try {
+    value[symToStringTag] = undefined;
+    var unmasked = true;
+  } catch (e) {}
+
+  var result = nativeObjectToString.call(value);
+  if (unmasked) {
+    if (isOwn) {
+      value[symToStringTag] = tag;
+    } else {
+      delete value[symToStringTag];
+    }
+  }
+  return result;
+}
+
+module.exports = getRawTag;

_getTag.js

@@ -15,16 +15,6 @@ var mapTag = '[object Map]',
 
 var dataViewTag = '[object DataView]';
 
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
-
-/**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
- * of values.
- */
-var objectToString = objectProto.toString;
-
 /** Used to detect maps, sets, and weakmaps. */
 var dataViewCtorString = toSource(DataView),
     mapCtorString = toSource(Map),
@@ -41,17 +31,16 @@ var dataViewCtorString = toSource(DataView),
  */
 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) ||
     (Set && getTag(new Set) != setTag) ||
     (WeakMap && getTag(new WeakMap) != weakMapTag)) {
   getTag = function(value) {
-    var result = objectToString.call(value),
+    var result = baseGetTag(value),
         Ctor = result == objectTag ? value.constructor : undefined,
-        ctorString = Ctor ? toSource(Ctor) : undefined;
+        ctorString = Ctor ? toSource(Ctor) : '';
 
     if (ctorString) {
       switch (ctorString) {

_hasPath.js

@@ -4,7 +4,6 @@ var castPath = require('./_castPath'),
     isIndex = require('./_isIndex'),
     isKey = require('./_isKey'),
     isLength = require('./isLength'),
-    isString = require('./isString'),
     toKey = require('./_toKey');
 
 /**
@@ -19,9 +18,9 @@ var castPath = require('./_castPath'),
 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]);
@@ -30,12 +29,12 @@ function hasPath(object, path, hasFunc) {
     }
     object = object[key];
   }
-  if (result) {
+  if (result || ++index != length) {
     return result;
   }
-  var length = object ? object.length : 0;
+  length = object == null ? 0 : object.length;
   return !!length && isLength(length) && isIndex(key, length) &&
-    (isArray(object) || isString(object) || isArguments(object));
+    (isArray(object) || isArguments(object));
 }
 
 module.exports = hasPath;

_hasUnicode.js

@@ -8,6 +8,17 @@ var rsAstralRange = '\\ud800-\\udfff',
 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 + ']');
 
-module.exports = 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);
+}
+
+module.exports = hasUnicode;

_hasUnicodeWord.js

@@ -0,0 +1,15 @@
+/** 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);
+}
+
+module.exports = hasUnicodeWord;

_hashClear.js

@@ -9,6 +9,7 @@ var nativeCreate = require('./_nativeCreate');
  */
 function hashClear() {
   this.__data__ = nativeCreate ? nativeCreate(null) : {};
+  this.size = 0;
 }
 
 module.exports = hashClear;

_hashDelete.js

@@ -9,7 +9,9 @@
  * @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;
 }
 
 module.exports = hashDelete;

_hashSet.js

@@ -15,6 +15,7 @@ var HASH_UNDEFINED = '__lodash_hash_undefined__';
  */
 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;
 }

_insertWrapDetails.js

@@ -10,9 +10,11 @@ var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/;
  * @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');

_isHostObject.js

@@ -1,20 +0,0 @@
-/**
- * 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;
-}
-
-module.exports = isHostObject;

_listCacheClear.js

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

_listCacheDelete.js

@@ -28,6 +28,7 @@ function listCacheDelete(key) {
   } else {
     splice.call(data, index, 1);
   }
+  --this.size;
   return true;
 }
 

_listCacheSet.js

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

_mapCacheClear.js

@@ -10,6 +10,7 @@ var Hash = require('./_Hash'),
  * @memberOf MapCache
  */
 function mapCacheClear() {
+  this.size = 0;
   this.__data__ = {
     'hash': new Hash,
     'map': new (Map || ListCache),

_mapCacheDelete.js

@@ -10,7 +10,9 @@ var getMapData = require('./_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;
 }
 
 module.exports = mapCacheDelete;

_mapCacheSet.js

@@ -11,7 +11,11 @@ var getMapData = require('./_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 +1,26 @@
+var memoize = require('./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;
+}
+
+module.exports = memoizeCapped;

_objectToString.js

@@ -0,0 +1,22 @@
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var nativeObjectToString = objectProto.toString;
+
+/**
+ * Converts `value` to a string using `Object.prototype.toString`.
+ *
+ * @private
+ * @param {*} value The value to convert.
+ * @returns {string} Returns the converted string.
+ */
+function objectToString(value) {
+  return nativeObjectToString.call(value);
+}
+
+module.exports = objectToString;

_overRest.js

@@ -0,0 +1,36 @@
+var apply = require('./_apply');
+
+/* 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);
+  };
+}
+
+module.exports = overRest;

_setData.js

@@ -1,9 +1,5 @@
 var baseSetData = require('./_baseSetData'),
-    now = require('./now');
-
-/** Used to detect hot functions by number of calls within a span of milliseconds. */
-var HOT_COUNT = 150,
-    HOT_SPAN = 16;
+    shortOut = require('./_shortOut');
 
 /**
  * Sets metadata for `func`.
@@ -19,24 +15,6 @@ var HOT_COUNT = 150,
  * @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);
 
 module.exports = setData;

_setToString.js

@@ -0,0 +1,14 @@
+var baseSetToString = require('./_baseSetToString'),
+    shortOut = require('./_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);
+
+module.exports = setToString;

_setWrapToString.js

@@ -1,8 +1,6 @@
-var constant = require('./constant'),
-    defineProperty = require('./_defineProperty'),
-    getWrapDetails = require('./_getWrapDetails'),
-    identity = require('./identity'),
+var getWrapDetails = require('./_getWrapDetails'),
     insertWrapDetails = require('./_insertWrapDetails'),
+    setToString = require('./_setToString'),
     updateWrapDetails = require('./_updateWrapDetails');
 
 /**
@@ -15,13 +13,9 @@ var constant = require('./constant'),
  * @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)));
+}
 
 module.exports = setWrapToString;

_shortOut.js

@@ -0,0 +1,37 @@
+/** Used to detect hot functions by number of calls within a span of milliseconds. */
+var HOT_COUNT = 800,
+    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);
+  };
+}
+
+module.exports = shortOut;