Bump to v4.8.0.

LICENSE

@@ -1,23 +1,47 @@
-The MIT License (MIT)
+Copyright jQuery Foundation and other contributors <https://jquery.org/>
 
-Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
-Based on Underscore.js, copyright 2009-2016 Jeremy Ashkenas,
+Based on Underscore.js, copyright Jeremy Ashkenas,
 DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
+This software consists of voluntary contributions made by many
+individuals. For exact contribution history, see the revision history
+available at https://github.com/lodash/lodash
 
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
+The following license applies to all parts of this software except as
+documented below:
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+====
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+====
+
+Copyright and related rights for sample code are waived via CC0. Sample
+code is defined as all source code displayed within the prose of the
+documentation.
+
+CC0: http://creativecommons.org/publicdomain/zero/1.0/
+
+====
+
+Files located in the node_modules and vendor directories are externally
+maintained libraries used by this software which have their own
+licenses; we recommend you read them, as their terms may differ from the
+terms above.

README.md

@@ -1,10 +1,10 @@
-# lodash-es v4.6.1
+# lodash-es v4.8.0
 
-The [lodash](https://lodash.com/) library exported as [ES](http://www.ecma-international.org/ecma-262/6.0/) modules.
+The [Lodash](https://lodash.com/) library exported as [ES](http://www.ecma-international.org/ecma-262/6.0/) modules.
 
 Generated using [lodash-cli](https://www.npmjs.com/package/lodash-cli):
 ```bash
 $ lodash modularize exports=es -o ./
 ```
 
-See the [package source](https://github.com/lodash/lodash/tree/4.6.1-es) for more details.
+See the [package source](https://github.com/lodash/lodash/tree/4.8.0-es) for more details.

_DataView.js

@@ -0,0 +1,7 @@
+import getNative from './_getNative';
+import root from './_root';
+
+/* Built-in method references that are verified to be native. */
+var DataView = getNative(root, 'DataView');
+
+export default DataView;

_LazyWrapper.js

@@ -21,6 +21,7 @@ function LazyWrapper(value) {
   this.__views__ = [];
 }
 
+// Ensure `LazyWrapper` is an instance of `baseLodash`.
 LazyWrapper.prototype = baseCreate(baseLodash.prototype);
 LazyWrapper.prototype.constructor = LazyWrapper;
 

_LodashWrapper.js

@@ -6,7 +6,7 @@ import baseLodash from './_baseLodash';
  *
  * @private
  * @param {*} value The value to wrap.
- * @param {boolean} [chainAll] Enable chaining for all wrapper methods.
+ * @param {boolean} [chainAll] Enable explicit method chain sequences.
  */
 function LodashWrapper(value, chainAll) {
   this.__wrapped__ = value;

_MapCache.js

@@ -22,7 +22,7 @@ function MapCache(values) {
   }
 }
 
-// Add functions to the `MapCache`.
+// Add methods to `MapCache`.
 MapCache.prototype.clear = mapClear;
 MapCache.prototype['delete'] = mapDelete;
 MapCache.prototype.get = mapGet;

_Promise.js

@@ -0,0 +1,7 @@
+import getNative from './_getNative';
+import root from './_root';
+
+/* Built-in method references that are verified to be native. */
+var Promise = getNative(root, 'Promise');
+
+export default Promise;

_SetCache.js

@@ -19,7 +19,7 @@ function SetCache(values) {
   }
 }
 
-// Add functions to the `SetCache`.
+// Add methods to `SetCache`.
 SetCache.prototype.push = cachePush;
 
 export default SetCache;

_Stack.js

@@ -22,7 +22,7 @@ function Stack(values) {
   }
 }
 
-// Add functions to the `Stack` cache.
+// Add methods to `Stack`.
 Stack.prototype.clear = stackClear;
 Stack.prototype['delete'] = stackDelete;
 Stack.prototype.get = stackGet;

_apply.js

@@ -5,7 +5,7 @@
  * @private
  * @param {Function} func The function to invoke.
  * @param {*} thisArg The `this` binding of `func`.
- * @param {...*} args The arguments to invoke `func` with.
+ * @param {Array} args The arguments to invoke `func` with.
  * @returns {*} Returns the result of `func`.
  */
 function apply(func, thisArg, args) {

_arrayEvery.js

@@ -5,7 +5,8 @@
  * @private
  * @param {Array} array The array to iterate over.
  * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if all elements pass the predicate check, else `false`.
+ * @returns {boolean} Returns `true` if all elements pass the predicate check,
+ *  else `false`.
  */
 function arrayEvery(array, predicate) {
   var index = -1,

_arrayReduce.js

@@ -6,7 +6,8 @@
  * @param {Array} array The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @param {*} [accumulator] The initial value.
- * @param {boolean} [initAccum] Specify using the first element of `array` as the initial value.
+ * @param {boolean} [initAccum] Specify using the first element of `array` as
+ *  the initial value.
  * @returns {*} Returns the accumulated value.
  */
 function arrayReduce(array, iteratee, accumulator, initAccum) {

_arrayReduceRight.js

@@ -6,7 +6,8 @@
  * @param {Array} array The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @param {*} [accumulator] The initial value.
- * @param {boolean} [initAccum] Specify using the last element of `array` as the initial value.
+ * @param {boolean} [initAccum] Specify using the last element of `array` as
+ *  the initial value.
  * @returns {*} Returns the accumulated value.
  */
 function arrayReduceRight(array, iteratee, accumulator, initAccum) {

_arraySome.js

@@ -5,7 +5,8 @@
  * @private
  * @param {Array} array The array to iterate over.
  * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if any element passes the predicate check, else `false`.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
  */
 function arraySome(array, predicate) {
   var index = -1,

_assocDelete.js

@@ -10,7 +10,7 @@ var splice = arrayProto.splice;
  * Removes `key` and its value from the associative array.
  *
  * @private
- * @param {Array} array The array to query.
+ * @param {Array} array The array to modify.
  * @param {string} key The key of the value to remove.
  * @returns {boolean} Returns `true` if the entry was removed, else `false`.
  */

_assocIndexOf.js

@@ -1,8 +1,7 @@
 import eq from './eq';
 
 /**
- * Gets the index at which the first occurrence of `key` is found in `array`
- * of key-value pairs.
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
  *
  * @private
  * @param {Array} array The array to search.

_baseCastArrayLikeObject.js

@@ -5,7 +5,7 @@ import isArrayLikeObject from './isArrayLikeObject';
  *
  * @private
  * @param {*} value The value to inspect.
- * @returns {Array} Returns the array-like object.
+ * @returns {Array|Object} Returns the cast array-like object.
  */
 function baseCastArrayLikeObject(value) {
   return isArrayLikeObject(value) ? value : [];

_baseCastFunction.js

@@ -5,7 +5,7 @@ import identity from './identity';
  *
  * @private
  * @param {*} value The value to inspect.
- * @returns {Array} Returns the array-like object.
+ * @returns {Function} Returns cast function.
  */
 function baseCastFunction(value) {
   return typeof value == 'function' ? value : identity;

_baseCastKey.js

@@ -0,0 +1,14 @@
+import isSymbol from './isSymbol';
+
+/**
+ * Casts `value` to a string if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the cast key.
+ */
+function baseCastKey(key) {
+  return (typeof key == 'string' || isSymbol(key)) ? key : (key + '');
+}
+
+export default baseCastKey;

_baseClone.js

@@ -2,10 +2,10 @@ import Stack from './_Stack';
 import arrayEach from './_arrayEach';
 import assignValue from './_assignValue';
 import baseAssign from './_baseAssign';
-import baseForOwn from './_baseForOwn';
 import cloneBuffer from './_cloneBuffer';
 import copyArray from './_copyArray';
 import copySymbols from './_copySymbols';
+import getAllKeys from './_getAllKeys';
 import getTag from './_getTag';
 import initCloneArray from './_initCloneArray';
 import initCloneByTag from './_initCloneByTag';
@@ -14,6 +14,7 @@ import isArray from './isArray';
 import isBuffer from './isBuffer';
 import isHostObject from './_isHostObject';
 import isObject from './isObject';
+import keys from './keys';
 
 /** `Object#toString` result references. */
 var argsTag = '[object Arguments]',
@@ -33,6 +34,7 @@ var argsTag = '[object Arguments]',
     weakMapTag = '[object WeakMap]';
 
 var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
     float32Tag = '[object Float32Array]',
     float64Tag = '[object Float64Array]',
     int8Tag = '[object Int8Array]',
@@ -46,16 +48,16 @@ var arrayBufferTag = '[object ArrayBuffer]',
 /** Used to identify `toStringTag` values supported by `_.clone`. */
 var cloneableTags = {};
 cloneableTags[argsTag] = cloneableTags[arrayTag] =
-cloneableTags[arrayBufferTag] = cloneableTags[boolTag] =
-cloneableTags[dateTag] = cloneableTags[float32Tag] =
-cloneableTags[float64Tag] = cloneableTags[int8Tag] =
-cloneableTags[int16Tag] = cloneableTags[int32Tag] =
-cloneableTags[mapTag] = cloneableTags[numberTag] =
-cloneableTags[objectTag] = cloneableTags[regexpTag] =
-cloneableTags[setTag] = cloneableTags[stringTag] =
-cloneableTags[symbolTag] = cloneableTags[uint8Tag] =
-cloneableTags[uint8ClampedTag] = cloneableTags[uint16Tag] =
-cloneableTags[uint32Tag] = true;
+cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
+cloneableTags[boolTag] = cloneableTags[dateTag] =
+cloneableTags[float32Tag] = cloneableTags[float64Tag] =
+cloneableTags[int8Tag] = cloneableTags[int16Tag] =
+cloneableTags[int32Tag] = cloneableTags[mapTag] =
+cloneableTags[numberTag] = cloneableTags[objectTag] =
+cloneableTags[regexpTag] = cloneableTags[setTag] =
+cloneableTags[stringTag] = cloneableTags[symbolTag] =
+cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
+cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
 cloneableTags[errorTag] = cloneableTags[funcTag] =
 cloneableTags[weakMapTag] = false;
 
@@ -103,14 +105,13 @@ function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
       }
       result = initCloneObject(isFunc ? {} : value);
       if (!isDeep) {
-        result = baseAssign(result, value);
-        return isFull ? copySymbols(value, result) : result;
+        return copySymbols(value, baseAssign(result, value));
       }
     } else {
       if (!cloneableTags[tag]) {
         return object ? value : {};
       }
-      result = initCloneByTag(value, tag, isDeep);
+      result = initCloneByTag(value, tag, baseClone, isDeep);
     }
   }
   // Check for circular references and return its corresponding clone.
@@ -121,11 +122,18 @@ function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
   }
   stack.set(value, result);
 
+  if (!isArr) {
+    var props = isFull ? getAllKeys(value) : keys(value);
+  }
   // Recursively populate clone (susceptible to call stack limits).
-  (isArr ? arrayEach : baseForOwn)(value, function(subValue, key) {
+  arrayEach(props || value, function(subValue, key) {
+    if (props) {
+      key = subValue;
+      subValue = value[key];
+    }
     assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
   });
-  return (isFull && !isArr) ? copySymbols(value, result) : result;
+  return result;
 }
 
 export default baseClone;

_baseConforms.js

@@ -21,7 +21,8 @@ function baseConforms(source) {
           predicate = source[key],
           value = object[key];
 
-      if ((value === undefined && !(key in Object(object))) || !predicate(value)) {
+      if ((value === undefined &&
+          !(key in Object(object))) || !predicate(value)) {
         return false;
       }
     }

_baseDifference.js

@@ -9,8 +9,8 @@ import cacheHas from './_cacheHas';
 var LARGE_ARRAY_SIZE = 200;
 
 /**
- * The base implementation of methods like `_.difference` without support for
- * excluding multiple arrays or iteratee shorthands.
+ * The base implementation of methods like `_.difference` without support
+ * for excluding multiple arrays or iteratee shorthands.
  *
  * @private
  * @param {Array} array The array to inspect.

_baseEvery.js

@@ -6,7 +6,8 @@ import baseEach from './_baseEach';
  * @private
  * @param {Array|Object} collection The collection to iterate over.
  * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if all elements pass the predicate check, else `false`
+ * @returns {boolean} Returns `true` if all elements pass the predicate check,
+ *  else `false`
  */
 function baseEvery(collection, predicate) {
   var result = true;

_baseFind.js

@@ -7,7 +7,8 @@
  * @param {Array|Object} collection The collection to search.
  * @param {Function} predicate The function invoked per iteration.
  * @param {Function} eachFunc The function to iterate over `collection`.
- * @param {boolean} [retKey] Specify returning the key of the found element instead of the element itself.
+ * @param {boolean} [retKey] Specify returning the key of the found element
+ *  instead of the element itself.
  * @returns {*} Returns the found element or its key, else `undefined`.
  */
 function baseFind(collection, predicate, eachFunc, retKey) {

_baseFor.js

@@ -1,10 +1,9 @@
 import createBaseFor from './_createBaseFor';
 
 /**
- * The base implementation of `baseForIn` and `baseForOwn` which iterates
- * over `object` properties returned by `keysFunc` invoking `iteratee` for
- * each property. Iteratee functions may exit iteration early by explicitly
- * returning `false`.
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` invoking `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
  *
  * @private
  * @param {Object} object The object to iterate over.

_baseForIn.js

@@ -1,16 +0,0 @@
-import baseFor from './_baseFor';
-import keysIn from './keysIn';
-
-/**
- * The base implementation of `_.forIn` without support for iteratee shorthands.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Object} Returns `object`.
- */
-function baseForIn(object, iteratee) {
-  return object == null ? object : baseFor(object, iteratee, keysIn);
-}
-
-export default baseForIn;

_baseGet.js

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

_baseGetAllKeys.js

@@ -0,0 +1,22 @@
+import arrayPush from './_arrayPush';
+import isArray from './isArray';
+
+/**
+ * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
+ * `keysFunc` and `symbolsFunc` to get the enumerable property names and
+ * symbols of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @param {Function} symbolsFunc The function to get the symbols of `object`.
+ * @returns {Array} Returns the array of property names and symbols.
+ */
+function baseGetAllKeys(object, keysFunc, symbolsFunc) {
+  var result = keysFunc(object);
+  return isArray(object)
+    ? result
+    : arrayPush(result, symbolsFunc(object));
+}
+
+export default baseGetAllKeys;

_baseHas.js

@@ -1,12 +1,11 @@
+import getPrototype from './_getPrototype';
+
 /** Used for built-in method references. */
 var objectProto = Object.prototype;
 
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
-/** Built-in value references. */
-var getPrototypeOf = Object.getPrototypeOf;
-
 /**
  * The base implementation of `_.has` without support for deep paths.
  *
@@ -20,7 +19,7 @@ function baseHas(object, key) {
   // that are composed entirely of index properties, return `false` for
   // `hasOwnProperty` checks of them.
   return hasOwnProperty.call(object, key) ||
-    (typeof object == 'object' && key in object && getPrototypeOf(object) === null);
+    (typeof object == 'object' && key in object && getPrototype(object) === null);
 }
 
 export default baseHas;

_baseIsEqualDeep.js

@@ -31,7 +31,8 @@ var hasOwnProperty = objectProto.hasOwnProperty;
  * @param {Object} other The other object to compare.
  * @param {Function} equalFunc The function to determine equivalents of values.
  * @param {Function} [customizer] The function to customize comparisons.
- * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual` for more details.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
  * @param {Object} [stack] Tracks traversed `object` and `other` objects.
  * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
  */
@@ -64,8 +65,11 @@ function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
         othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
 
     if (objIsWrapped || othIsWrapped) {
+      var objUnwrapped = objIsWrapped ? object.value() : object,
+          othUnwrapped = othIsWrapped ? other.value() : other;
+
       stack || (stack = new Stack);
-      return equalFunc(objIsWrapped ? object.value() : object, othIsWrapped ? other.value() : other, customizer, bitmask, stack);
+      return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
     }
   }
   if (!isSameTag) {

_baseIsMatch.js

@@ -44,9 +44,10 @@ function baseIsMatch(object, source, matchData, customizer) {
         return false;
       }
     } else {
-      var stack = new Stack,
-          result = customizer ? customizer(objValue, srcValue, key, object, source, stack) : undefined;
-
+      var stack = new Stack;
+      if (customizer) {
+        var result = customizer(objValue, srcValue, key, object, source, stack);
+      }
       if (!(result === undefined
             ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
             : result

_baseIteratee.js

@@ -12,14 +12,15 @@ import property from './property';
  * @returns {Function} Returns the iteratee.
  */
 function baseIteratee(value) {
-  var type = typeof value;
-  if (type == 'function') {
+  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+  if (typeof value == 'function') {
     return value;
   }
   if (value == null) {
     return identity;
   }
-  if (type == 'object') {
+  if (typeof value == 'object') {
     return isArray(value)
       ? baseMatchesProperty(value[0], value[1])
       : baseMatches(value);

_baseLodash.js

@@ -1,5 +1,5 @@
 /**
- * The function whose prototype all chaining wrappers inherit from.
+ * The function whose prototype chain sequence wrappers inherit from.
  *
  * @private
  */

_baseMatches.js

@@ -1,5 +1,6 @@
 import baseIsMatch from './_baseIsMatch';
 import getMatchData from './_getMatchData';
+import matchesStrictComparable from './_matchesStrictComparable';
 
 /**
  * The base implementation of `_.matches` which doesn't clone `source`.
@@ -11,16 +12,7 @@ import getMatchData from './_getMatchData';
 function baseMatches(source) {
   var matchData = getMatchData(source);
   if (matchData.length == 1 && matchData[0][2]) {
-    var key = matchData[0][0],
-        value = matchData[0][1];
-
-    return function(object) {
-      if (object == null) {
-        return false;
-      }
-      return object[key] === value &&
-        (value !== undefined || (key in Object(object)));
-    };
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
   }
   return function(object) {
     return object === source || baseIsMatch(object, source, matchData);

_baseMatchesProperty.js

@@ -1,6 +1,9 @@
 import baseIsEqual from './_baseIsEqual';
 import get from './get';
 import hasIn from './hasIn';
+import isKey from './_isKey';
+import isStrictComparable from './_isStrictComparable';
+import matchesStrictComparable from './_matchesStrictComparable';
 
 /** Used to compose bitmasks for comparison styles. */
 var UNORDERED_COMPARE_FLAG = 1,
@@ -15,6 +18,9 @@ var UNORDERED_COMPARE_FLAG = 1,
  * @returns {Function} Returns the new function.
  */
 function baseMatchesProperty(path, srcValue) {
+  if (isKey(path) && isStrictComparable(srcValue)) {
+    return matchesStrictComparable(path, srcValue);
+  }
   return function(object) {
     var objValue = get(object, path);
     return (objValue === undefined && objValue === srcValue)

_baseMean.js

@@ -0,0 +1,20 @@
+import baseSum from './_baseSum';
+
+/** Used as references for various `Number` constants. */
+var NAN = 0 / 0;
+
+/**
+ * The base implementation of `_.mean` and `_.meanBy` without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {number} Returns the mean.
+ */
+function baseMean(array, iteratee) {
+  var length = array ? array.length : 0;
+  return length ? (baseSum(array, iteratee) / length) : NAN;
+}
+
+export default baseMean;

_baseMerge.js

@@ -15,16 +15,16 @@ import keysIn from './keysIn';
  * @param {Object} source The source object.
  * @param {number} srcIndex The index of `source`.
  * @param {Function} [customizer] The function to customize merged values.
- * @param {Object} [stack] Tracks traversed source values and their merged counterparts.
+ * @param {Object} [stack] Tracks traversed source values and their merged
+ *  counterparts.
  */
 function baseMerge(object, source, srcIndex, customizer, stack) {
   if (object === source) {
     return;
   }
-  var props = (isArray(source) || isTypedArray(source))
-    ? undefined
-    : keysIn(source);
-
+  if (!(isArray(source) || isTypedArray(source))) {
+    var props = keysIn(source);
+  }
   arrayEach(props || source, function(srcValue, key) {
     if (props) {
       key = srcValue;

_baseMergeDeep.js

@@ -22,7 +22,8 @@ import toPlainObject from './toPlainObject';
  * @param {number} srcIndex The index of `source`.
  * @param {Function} mergeFunc The function to merge values.
  * @param {Function} [customizer] The function to customize assigned values.
- * @param {Object} [stack] Tracks traversed source values and their merged counterparts.
+ * @param {Object} [stack] Tracks traversed source values and their merged
+ *  counterparts.
  */
 function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
   var objValue = object[key],
@@ -50,7 +51,7 @@ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, sta
       }
       else {
         isCommon = false;
-        newValue = baseClone(srcValue, !customizer);
+        newValue = baseClone(srcValue, true);
       }
     }
     else if (isPlainObject(srcValue) || isArguments(srcValue)) {
@@ -59,7 +60,7 @@ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, sta
       }
       else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
         isCommon = false;
-        newValue = baseClone(srcValue, !customizer);
+        newValue = baseClone(srcValue, true);
       }
       else {
         newValue = objValue;

_baseOrderBy.js

@@ -3,6 +3,7 @@ import baseIteratee from './_baseIteratee';
 import baseMap from './_baseMap';
 import baseSortBy from './_baseSortBy';
 import compareMultiple from './_compareMultiple';
+import identity from './identity';
 
 /**
  * The base implementation of `_.orderBy` without param guards.
@@ -15,7 +16,7 @@ import compareMultiple from './_compareMultiple';
  */
 function baseOrderBy(collection, iteratees, orders) {
   var index = -1;
-  iteratees = arrayMap(iteratees.length ? iteratees : Array(1), baseIteratee);
+  iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseIteratee);
 
   var result = baseMap(collection, function(value, key, collection) {
     var criteria = arrayMap(iteratees, function(iteratee) {

_basePick.js

@@ -2,11 +2,11 @@ import arrayReduce from './_arrayReduce';
 
 /**
  * The base implementation of `_.pick` without support for individual
- * property names.
+ * property identifiers.
  *
  * @private
  * @param {Object} object The source object.
- * @param {string[]} props The property names to pick.
+ * @param {string[]} props The property identifiers to pick.
  * @returns {Object} Returns the new object.
  */
 function basePick(object, props) {

_basePickBy.js

@@ -1,4 +1,4 @@
-import baseForIn from './_baseForIn';
+import getAllKeysIn from './_getAllKeysIn';
 
 /**
  * The base implementation of  `_.pickBy` without support for iteratee shorthands.
@@ -9,12 +9,19 @@ import baseForIn from './_baseForIn';
  * @returns {Object} Returns the new object.
  */
 function basePickBy(object, predicate) {
-  var result = {};
-  baseForIn(object, function(value, key) {
+  var index = -1,
+      props = getAllKeysIn(object),
+      length = props.length,
+      result = {};
+
+  while (++index < length) {
+    var key = props[index],
+        value = object[key];
+
     if (predicate(value, key)) {
       result[key] = value;
     }
-  });
+  }
   return result;
 }
 

_baseReduce.js

@@ -6,7 +6,8 @@
  * @param {Array|Object} collection The collection to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @param {*} accumulator The initial value.
- * @param {boolean} initAccum Specify using the first or last element of `collection` as the initial value.
+ * @param {boolean} initAccum Specify using the first or last element of
+ *  `collection` as the initial value.
  * @param {Function} eachFunc The function to iterate over `collection`.
  * @returns {*} Returns the accumulated value.
  */

_baseRepeat.js

@@ -0,0 +1,35 @@
+/** Used as references for various `Number` constants. */
+var MAX_SAFE_INTEGER = 9007199254740991;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeFloor = Math.floor;
+
+/**
+ * The base implementation of `_.repeat` which doesn't coerce arguments.
+ *
+ * @private
+ * @param {string} string The string to repeat.
+ * @param {number} n The number of times to repeat the string.
+ * @returns {string} Returns the repeated string.
+ */
+function baseRepeat(string, n) {
+  var result = '';
+  if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
+    return result;
+  }
+  // Leverage the exponentiation by squaring algorithm for a faster repeat.
+  // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
+  do {
+    if (n % 2) {
+      result += string;
+    }
+    n = nativeFloor(n / 2);
+    if (n) {
+      string += string;
+    }
+  } while (n);
+
+  return result;
+}
+
+export default baseRepeat;

_baseSet.js

@@ -15,7 +15,7 @@ import isObject from './isObject';
  * @returns {Object} Returns `object`.
  */
 function baseSet(object, path, value, customizer) {
-  path = isKey(path, object) ? [path + ''] : baseCastPath(path);
+  path = isKey(path, object) ? [path] : baseCastPath(path);
 
   var index = -1,
       length = path.length,

_baseSome.js

@@ -6,7 +6,8 @@ import baseEach from './_baseEach';
  * @private
  * @param {Array|Object} collection The collection to iterate over.
  * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if any element passes the predicate check, else `false`.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ *  else `false`.
  */
 function baseSome(collection, predicate) {
   var result;

_baseSortedIndexBy.js

@@ -16,7 +16,8 @@ var nativeFloor = Math.floor,
  * @param {*} value The value to evaluate.
  * @param {Function} iteratee The iteratee invoked per element.
  * @param {boolean} [retHighest] Specify returning the highest qualified index.
- * @returns {number} Returns the index at which `value` should be inserted into `array`.
+ * @returns {number} Returns the index at which `value` should be inserted
+ *  into `array`.
  */
 function baseSortedIndexBy(array, value, iteratee, retHighest) {
   value = iteratee(value);

_baseSum.js

@@ -1,5 +1,6 @@
 /**
- * The base implementation of `_.sum` without support for iteratee shorthands.
+ * The base implementation of `_.sum` and `_.sumBy` without support for
+ * iteratee shorthands.
  *
  * @private
  * @param {Array} array The array to iterate over.

_baseUnset.js

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

_baseZipObject.js

@@ -2,7 +2,7 @@
  * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
  *
  * @private
- * @param {Array} props The property names.
+ * @param {Array} props The property identifiers.
  * @param {Array} values The property values.
  * @param {Function} assignFunc The function to assign values.
  * @returns {Object} Returns the new object.
@@ -14,7 +14,8 @@ function baseZipObject(props, values, assignFunc) {
       result = {};
 
   while (++index < length) {
-    assignFunc(result, props[index], index < valsLength ? values[index] : undefined);
+    var value = index < valsLength ? values[index] : undefined;
+    assignFunc(result, props[index], value);
   }
   return result;
 }

_cloneDataView.js

@@ -0,0 +1,16 @@
+import cloneArrayBuffer from './_cloneArrayBuffer';
+
+/**
+ * Creates a clone of `dataView`.
+ *
+ * @private
+ * @param {Object} dataView The data view to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned data view.
+ */
+function cloneDataView(dataView, isDeep) {
+  var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
+  return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
+}
+
+export default cloneDataView;

_cloneMap.js

@@ -7,10 +7,13 @@ import mapToArray from './_mapToArray';
  *
  * @private
  * @param {Object} map The map to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
  * @returns {Object} Returns the cloned map.
  */
-function cloneMap(map) {
-  return arrayReduce(mapToArray(map), addMapEntry, new map.constructor);
+function cloneMap(map, isDeep, cloneFunc) {
+  var array = isDeep ? cloneFunc(mapToArray(map), true) : mapToArray(map);
+  return arrayReduce(array, addMapEntry, new map.constructor);
 }
 
 export default cloneMap;

_cloneSet.js

@@ -7,10 +7,13 @@ import setToArray from './_setToArray';
  *
  * @private
  * @param {Object} set The set to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
  * @returns {Object} Returns the cloned set.
  */
-function cloneSet(set) {
-  return arrayReduce(setToArray(set), addSetEntry, new set.constructor);
+function cloneSet(set, isDeep, cloneFunc) {
+  var array = isDeep ? cloneFunc(setToArray(set), true) : setToArray(set);
+  return arrayReduce(array, addSetEntry, new set.constructor);
 }
 
 export default cloneSet;

_compareMultiple.js

@@ -37,7 +37,7 @@ function compareMultiple(object, other, orders) {
   // for more details.
   //
   // This also ensures a stable sort in V8 and other engines.
-  // See https://code.google.com/p/v8/issues/detail?id=90 for more details.
+  // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
   return object.index - other.index;
 }
 

_copyObject.js

@@ -5,7 +5,7 @@ import copyObjectWith from './_copyObjectWith';
  *
  * @private
  * @param {Object} source The object to copy properties from.
- * @param {Array} props The property names to copy.
+ * @param {Array} props The property identifiers to copy.
  * @param {Object} [object={}] The object to copy properties to.
  * @returns {Object} Returns `object`.
  */

_copyObjectWith.js

@@ -6,7 +6,7 @@ import assignValue from './_assignValue';
  *
  * @private
  * @param {Object} source The object to copy properties from.
- * @param {Array} props The property names to copy.
+ * @param {Array} props The property identifiers to copy.
  * @param {Object} [object={}] The object to copy properties to.
  * @param {Function} [customizer] The function to customize copied values.
  * @returns {Object} Returns `object`.

_createBaseFor.js

@@ -1,5 +1,5 @@
 /**
- * Creates a base function for methods like `_.forIn`.
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
  *
  * @private
  * @param {boolean} [fromRight] Specify iterating from right to left.

_createBaseWrapper.js

@@ -10,7 +10,8 @@ var BIND_FLAG = 1;
  *
  * @private
  * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details.
+ * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper`
+ *  for more details.
  * @param {*} [thisArg] The `this` binding of `func`.
  * @returns {Function} Returns the new wrapped function.
  */

_createCtorWrapper.js

@@ -11,8 +11,8 @@ import isObject from './isObject';
  */
 function createCtorWrapper(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
+    // 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
     // for more details.
     var args = arguments;
     switch (args.length) {

_createCurryWrapper.js

@@ -11,7 +11,8 @@ import root from './_root';
  *
  * @private
  * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details.
+ * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper`
+ *  for more details.
  * @param {number} arity The arity of `func`.
  * @returns {Function} Returns the new wrapped function.
  */

_createFlow.js

@@ -58,7 +58,9 @@ function createFlow(fromRight) {
           ) {
         wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
       } else {
-        wrapper = (func.length == 1 && isLaziable(func)) ? wrapper[funcName]() : wrapper.thru(func);
+        wrapper = (func.length == 1 && isLaziable(func))
+          ? wrapper[funcName]()
+          : wrapper.thru(func);
       }
     }
     return function() {

_createHybridWrapper.js

@@ -22,11 +22,14 @@ var BIND_FLAG = 1,
  *
  * @private
  * @param {Function|string} func The function or method name to wrap.
- * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details.
+ * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper`
+ *  for more details.
  * @param {*} [thisArg] The `this` binding of `func`.
- * @param {Array} [partials] The arguments to prepend to those provided to the new function.
+ * @param {Array} [partials] The arguments to prepend to those provided to
+ *  the new function.
  * @param {Array} [holders] The `partials` placeholder indexes.
- * @param {Array} [partialsRight] The arguments to append to those provided to the new function.
+ * @param {Array} [partialsRight] The arguments to append to those provided
+ *  to the new function.
  * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
  * @param {Array} [argPos] The argument positions of the new function.
  * @param {number} [ary] The arity cap of `func`.

_createMathOperation.js

@@ -0,0 +1,24 @@
+/**
+ * Creates a function that performs a mathematical operation on two values.
+ *
+ * @private
+ * @param {Function} operator The function to perform the operation.
+ * @returns {Function} Returns the new mathematical operation function.
+ */
+function createMathOperation(operator) {
+  return function(value, other) {
+    var result;
+    if (value === undefined && other === undefined) {
+      return 0;
+    }
+    if (value !== undefined) {
+      result = value;
+    }
+    if (other !== undefined) {
+      result = result === undefined ? other : operator(result, other);
+    }
+    return result;
+  };
+}
+
+export default createMathOperation;

_createOver.js

@@ -1,6 +1,5 @@
 import apply from './_apply';
 import arrayMap from './_arrayMap';
-import baseFlatten from './_baseFlatten';
 import baseIteratee from './_baseIteratee';
 import rest from './rest';
 
@@ -13,7 +12,7 @@ import rest from './rest';
  */
 function createOver(arrayFunc) {
   return rest(function(iteratees) {
-    iteratees = arrayMap(baseFlatten(iteratees, 1), baseIteratee);
+    iteratees = arrayMap(iteratees, baseIteratee);
     return rest(function(args) {
       var thisArg = this;
       return arrayFunc(iteratees, function(iteratee) {

_createPadding.js

@@ -1,7 +1,6 @@
-import repeat from './repeat';
+import baseRepeat from './_baseRepeat';
 import stringSize from './_stringSize';
 import stringToArray from './_stringToArray';
-import toInteger from './toInteger';
 
 /** Used to compose unicode character classes. */
 var rsAstralRange = '\\ud800-\\udfff',
@@ -23,25 +22,21 @@ var nativeCeil = Math.ceil;
  * is truncated if the number of characters exceeds `length`.
  *
  * @private
- * @param {string} string The string to create padding for.
- * @param {number} [length=0] The padding length.
+ * @param {number} length The padding length.
  * @param {string} [chars=' '] The string used as padding.
  * @returns {string} Returns the padding for `string`.
  */
-function createPadding(string, length, chars) {
-  length = toInteger(length);
-
-  var strLength = stringSize(string);
-  if (!length || strLength >= length) {
-    return '';
-  }
-  var padLength = length - strLength;
+function createPadding(length, chars) {
   chars = chars === undefined ? ' ' : (chars + '');
 
-  var result = repeat(chars, nativeCeil(padLength / stringSize(chars)));
+  var charsLength = chars.length;
+  if (charsLength < 2) {
+    return charsLength ? baseRepeat(chars, length) : chars;
+  }
+  var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
   return reHasComplexSymbol.test(chars)
-    ? stringToArray(result).slice(0, padLength).join('')
-    : result.slice(0, padLength);
+    ? stringToArray(result).slice(0, length).join('')
+    : result.slice(0, length);
 }
 
 export default createPadding;

_createPartialWrapper.js

@@ -6,15 +6,16 @@ import root from './_root';
 var BIND_FLAG = 1;
 
 /**
- * Creates a function that wraps `func` to invoke it with the optional `this`
- * binding of `thisArg` and the `partials` prepended to those provided to
- * the wrapper.
+ * Creates a function that wraps `func` to invoke it with the `this` binding
+ * of `thisArg` and `partials` prepended to the arguments it receives.
  *
  * @private
  * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details.
+ * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper`
+ *  for more details.
  * @param {*} thisArg The `this` binding of `func`.
- * @param {Array} partials The arguments to prepend to those provided to the new function.
+ * @param {Array} partials The arguments to prepend to those provided to
+ *  the new function.
  * @returns {Function} Returns the new wrapped function.
  */
 function createPartialWrapper(func, bitmask, thisArg, partials) {

_createRecurryWrapper.js

@@ -15,11 +15,13 @@ var BIND_FLAG = 1,
  *
  * @private
  * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details.
+ * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper`
+ *  for more details.
  * @param {Function} wrapFunc The function to create the `func` wrapper.
  * @param {*} placeholder The placeholder value.
  * @param {*} [thisArg] The `this` binding of `func`.
- * @param {Array} [partials] The arguments to prepend to those provided to the new function.
+ * @param {Array} [partials] The arguments to prepend to those provided to
+ *  the new function.
  * @param {Array} [holders] The `partials` placeholder indexes.
  * @param {Array} [argPos] The argument positions of the new function.
  * @param {number} [ary] The arity cap of `func`.

_equalArrays.js

@@ -13,7 +13,8 @@ var UNORDERED_COMPARE_FLAG = 1,
  * @param {Array} other The other array to compare.
  * @param {Function} equalFunc The function to determine equivalents of values.
  * @param {Function} customizer The function to customize comparisons.
- * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual` for more details.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
  * @param {Object} stack Tracks traversed `array` and `other` objects.
  * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
  */
@@ -55,12 +56,16 @@ function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
     // Recursively compare arrays (susceptible to call stack limits).
     if (isUnordered) {
       if (!arraySome(other, function(othValue) {
-            return arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack);
+            return arrValue === othValue ||
+              equalFunc(arrValue, othValue, customizer, bitmask, stack);
           })) {
         result = false;
         break;
       }
-    } else if (!(arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
+    } else if (!(
+          arrValue === othValue ||
+            equalFunc(arrValue, othValue, customizer, bitmask, stack)
+        )) {
       result = false;
       break;
     }

_equalByTag.js

@@ -19,7 +19,8 @@ var boolTag = '[object Boolean]',
     stringTag = '[object String]',
     symbolTag = '[object Symbol]';
 
-var arrayBufferTag = '[object ArrayBuffer]';
+var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]';
 
 /** Used to convert symbols to primitives and strings. */
 var symbolProto = Symbol ? Symbol.prototype : undefined,
@@ -38,12 +39,21 @@ var symbolProto = Symbol ? Symbol.prototype : undefined,
  * @param {string} tag The `toStringTag` of the objects to compare.
  * @param {Function} equalFunc The function to determine equivalents of values.
  * @param {Function} customizer The function to customize comparisons.
- * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual` for more details.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
  * @param {Object} stack Tracks traversed `object` and `other` objects.
  * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
  */
 function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
   switch (tag) {
+    case dataViewTag:
+      if ((object.byteLength != other.byteLength) ||
+          (object.byteOffset != other.byteOffset)) {
+        return false;
+      }
+      object = object.buffer;
+      other = other.buffer;
+
     case arrayBufferTag:
       if ((object.byteLength != other.byteLength) ||
           !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
@@ -53,8 +63,9 @@ function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
 
     case boolTag:
     case dateTag:
-      // Coerce dates and booleans to numbers, dates to milliseconds and booleans
-      // to `1` or `0` treating invalid dates coerced to `NaN` as not equal.
+      // Coerce dates and booleans to numbers, dates to milliseconds and
+      // booleans to `1` or `0` treating invalid dates coerced to `NaN` as
+      // not equal.
       return +object == +other;
 
     case errorTag:
@@ -66,8 +77,9 @@ function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
 
     case regexpTag:
     case stringTag:
-      // Coerce regexes to strings and treat strings primitives and string
-      // objects as equal. See https://es5.github.io/#x15.10.6.4 for more details.
+      // 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
+      // for more details.
       return object == (other + '');
 
     case mapTag:
@@ -85,8 +97,11 @@ function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
       if (stacked) {
         return stacked == other;
       }
+      bitmask |= UNORDERED_COMPARE_FLAG;
+      stack.set(object, other);
+
       // Recursively compare objects (susceptible to call stack limits).
-      return equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask | UNORDERED_COMPARE_FLAG, stack.set(object, other));
+      return equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
 
     case symbolTag:
       if (symbolValueOf) {

_equalObjects.js

@@ -13,7 +13,8 @@ var PARTIAL_COMPARE_FLAG = 2;
  * @param {Object} other The other object to compare.
  * @param {Function} equalFunc The function to determine equivalents of values.
  * @param {Function} customizer The function to customize comparisons.
- * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual` for more details.
+ * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
+ *  for more details.
  * @param {Object} stack Tracks traversed `object` and `other` objects.
  * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
  */

_getAllKeys.js

@@ -0,0 +1,16 @@
+import baseGetAllKeys from './_baseGetAllKeys';
+import getSymbols from './_getSymbols';
+import keys from './keys';
+
+/**
+ * Creates an array of own enumerable property names and symbols of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names and symbols.
+ */
+function getAllKeys(object) {
+  return baseGetAllKeys(object, keys, getSymbols);
+}
+
+export default getAllKeys;

_getAllKeysIn.js

@@ -0,0 +1,17 @@
+import baseGetAllKeys from './_baseGetAllKeys';
+import getSymbolsIn from './_getSymbolsIn';
+import keysIn from './keysIn';
+
+/**
+ * Creates an array of own and inherited enumerable property names and
+ * symbols of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names and symbols.
+ */
+function getAllKeysIn(object) {
+  return baseGetAllKeys(object, keysIn, getSymbolsIn);
+}
+
+export default getAllKeysIn;

_getLength.js

@@ -3,8 +3,9 @@ import baseProperty from './_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.
+ * **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.

_getPrototype.js

@@ -0,0 +1,15 @@
+/* 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]]`.
+ */
+function getPrototype(value) {
+  return nativeGetPrototype(Object(value));
+}
+
+export default getPrototype;

_getSymbols.js

@@ -2,14 +2,23 @@
 var getOwnPropertySymbols = Object.getOwnPropertySymbols;
 
 /**
- * Creates an array of the own symbol properties of `object`.
+ * Creates an array of the own enumerable symbol properties of `object`.
  *
  * @private
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of symbols.
  */
-var getSymbols = getOwnPropertySymbols || function() {
-  return [];
-};
+function getSymbols(object) {
+  // Coerce `object` to an object to avoid non-object errors in V8.
+  // See https://bugs.chromium.org/p/v8/issues/detail?id=3443 for more details.
+  return getOwnPropertySymbols(Object(object));
+}
+
+// Fallback for IE < 11.
+if (!getOwnPropertySymbols) {
+  getSymbols = function() {
+    return [];
+  };
+}
 
 export default getSymbols;

_getSymbolsIn.js

@@ -0,0 +1,25 @@
+import arrayPush from './_arrayPush';
+import getPrototype from './_getPrototype';
+import getSymbols from './_getSymbols';
+
+/** Built-in value references. */
+var getOwnPropertySymbols = Object.getOwnPropertySymbols;
+
+/**
+ * Creates an array of the own and inherited enumerable symbol properties
+ * of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of symbols.
+ */
+var getSymbolsIn = !getOwnPropertySymbols ? getSymbols : function(object) {
+  var result = [];
+  while (object) {
+    arrayPush(result, getSymbols(object));
+    object = getPrototype(object);
+  }
+  return result;
+};
+
+export default getSymbolsIn;

_getTag.js

@@ -1,29 +1,35 @@
+import DataView from './_DataView';
 import Map from './_Map';
+import Promise from './_Promise';
 import Set from './_Set';
 import WeakMap from './_WeakMap';
+import toSource from './_toSource';
 
 /** `Object#toString` result references. */
 var mapTag = '[object Map]',
     objectTag = '[object Object]',
+    promiseTag = '[object Promise]',
     setTag = '[object Set]',
     weakMapTag = '[object WeakMap]';
 
+var dataViewTag = '[object DataView]';
+
 /** Used for built-in method references. */
 var objectProto = Object.prototype;
 
-/** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
-
 /**
- * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
 
 /** Used to detect maps, sets, and weakmaps. */
-var mapCtorString = Map ? funcToString.call(Map) : '',
-    setCtorString = Set ? funcToString.call(Set) : '',
-    weakMapCtorString = WeakMap ? funcToString.call(WeakMap) : '';
+var dataViewCtorString = toSource(DataView),
+    mapCtorString = toSource(Map),
+    promiseCtorString = toSource(Promise),
+    setCtorString = toSource(Set),
+    weakMapCtorString = toSource(WeakMap);
 
 /**
  * Gets the `toStringTag` of `value`.
@@ -36,18 +42,23 @@ function getTag(value) {
   return objectToString.call(value);
 }
 
-// Fallback for IE 11 providing `toStringTag` values for maps, sets, and weakmaps.
-if ((Map && getTag(new Map) != mapTag) ||
+// Fallback for data views, maps, sets, and weak maps in IE 11,
+// for data views in Edge, and promises in Node.js.
+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),
         Ctor = result == objectTag ? value.constructor : null,
-        ctorString = typeof Ctor == 'function' ? funcToString.call(Ctor) : '';
+        ctorString = toSource(Ctor);
 
     if (ctorString) {
       switch (ctorString) {
+        case dataViewCtorString: return dataViewTag;
         case mapCtorString: return mapTag;
+        case promiseCtorString: return promiseTag;
         case setCtorString: return setTag;
         case weakMapCtorString: return weakMapTag;
       }

_hasPath.js

@@ -5,8 +5,6 @@ import isIndex from './_isIndex';
 import isKey from './_isKey';
 import isLength from './isLength';
 import isString from './isString';
-import last from './last';
-import parent from './_parent';
 
 /**
  * Checks if `path` exists on `object`.
@@ -18,23 +16,25 @@ import parent from './_parent';
  * @returns {boolean} Returns `true` if `path` exists, else `false`.
  */
 function hasPath(object, path, hasFunc) {
-  if (object == null) {
-    return false;
-  }
-  var result = hasFunc(object, path);
-  if (!result && !isKey(path)) {
-    path = baseCastPath(path);
-    object = parent(object, path);
-    if (object != null) {
-      path = last(path);
-      result = hasFunc(object, path);
+  path = isKey(path, object) ? [path] : baseCastPath(path);
+
+  var result,
+      index = -1,
+      length = path.length;
+
+  while (++index < length) {
+    var key = path[index];
+    if (!(result = object != null && hasFunc(object, key))) {
+      break;
     }
+    object = object[key];
   }
-  var length = object ? object.length : undefined;
-  return result || (
-    !!length && isLength(length) && isIndex(path, length) &&
-    (isArray(object) || isString(object) || isArguments(object))
-  );
+  if (result) {
+    return result;
+  }
+  var length = object ? object.length : 0;
+  return !!length && isLength(length) && isIndex(key, length) &&
+    (isArray(object) || isString(object) || isArguments(object));
 }
 
 export default hasPath;

_initCloneByTag.js

@@ -1,4 +1,5 @@
 import cloneArrayBuffer from './_cloneArrayBuffer';
+import cloneDataView from './_cloneDataView';
 import cloneMap from './_cloneMap';
 import cloneRegExp from './_cloneRegExp';
 import cloneSet from './_cloneSet';
@@ -16,6 +17,7 @@ var boolTag = '[object Boolean]',
     symbolTag = '[object Symbol]';
 
 var arrayBufferTag = '[object ArrayBuffer]',
+    dataViewTag = '[object DataView]',
     float32Tag = '[object Float32Array]',
     float64Tag = '[object Float64Array]',
     int8Tag = '[object Int8Array]',
@@ -35,10 +37,11 @@ var arrayBufferTag = '[object ArrayBuffer]',
  * @private
  * @param {Object} object The object to clone.
  * @param {string} tag The `toStringTag` of the object to clone.
+ * @param {Function} cloneFunc The function to clone values.
  * @param {boolean} [isDeep] Specify a deep clone.
  * @returns {Object} Returns the initialized clone.
  */
-function initCloneByTag(object, tag, isDeep) {
+function initCloneByTag(object, tag, cloneFunc, isDeep) {
   var Ctor = object.constructor;
   switch (tag) {
     case arrayBufferTag:
@@ -48,13 +51,16 @@ function initCloneByTag(object, tag, isDeep) {
     case dateTag:
       return new Ctor(+object);
 
+    case dataViewTag:
+      return cloneDataView(object, isDeep);
+
     case float32Tag: case float64Tag:
     case int8Tag: case int16Tag: case int32Tag:
     case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
       return cloneTypedArray(object, isDeep);
 
     case mapTag:
-      return cloneMap(object);
+      return cloneMap(object, isDeep, cloneFunc);
 
     case numberTag:
     case stringTag:
@@ -64,7 +70,7 @@ function initCloneByTag(object, tag, isDeep) {
       return cloneRegExp(object);
 
     case setTag:
-      return cloneSet(object);
+      return cloneSet(object, isDeep, cloneFunc);
 
     case symbolTag:
       return cloneSymbol(object);

_initCloneObject.js

@@ -1,9 +1,7 @@
 import baseCreate from './_baseCreate';
+import getPrototype from './_getPrototype';
 import isPrototype from './_isPrototype';
 
-/** Built-in value references. */
-var getPrototypeOf = Object.getPrototypeOf;
-
 /**
  * Initializes an object clone.
  *
@@ -13,7 +11,7 @@ var getPrototypeOf = Object.getPrototypeOf;
  */
 function initCloneObject(object) {
   return (typeof object.constructor == 'function' && !isPrototype(object))
-    ? baseCreate(getPrototypeOf(object))
+    ? baseCreate(getPrototype(object))
     : {};
 }
 

_isIterateeCall.js

@@ -10,7 +10,8 @@ import isObject from './isObject';
  * @param {*} value The potential iteratee value argument.
  * @param {*} index The potential iteratee index or key argument.
  * @param {*} object The potential iteratee object argument.
- * @returns {boolean} Returns `true` if the arguments are from an iteratee call, else `false`.
+ * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
+ *  else `false`.
  */
 function isIterateeCall(value, index, object) {
   if (!isObject(object)) {
@@ -18,8 +19,9 @@ function isIterateeCall(value, index, object) {
   }
   var type = typeof index;
   if (type == 'number'
-      ? (isArrayLike(object) && isIndex(index, object.length))
-      : (type == 'string' && index in object)) {
+        ? (isArrayLike(object) && isIndex(index, object.length))
+        : (type == 'string' && index in object)
+      ) {
     return eq(object[index], value);
   }
   return false;

_isKey.js

@@ -1,4 +1,5 @@
 import isArray from './isArray';
+import isSymbol from './isSymbol';
 
 /** Used to match property names within property paths. */
 var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
@@ -13,11 +14,12 @@ var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
  * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
  */
 function isKey(value, object) {
-  if (typeof value == 'number') {
+  var type = typeof value;
+  if (type == 'number' || type == 'symbol') {
     return true;
   }
   return !isArray(value) &&
-    (reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+    (isSymbol(value) || reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
       (object != null && value in Object(object)));
 }
 

_isLaziable.js

@@ -8,7 +8,8 @@ import lodash from './wrapperLodash';
  *
  * @private
  * @param {Function} func The function to check.
- * @returns {boolean} Returns `true` if `func` has a lazy counterpart, else `false`.
+ * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
+ *  else `false`.
  */
 function isLaziable(func) {
   var funcName = getFuncName(func),

_mapSet.js

@@ -11,7 +11,7 @@ import isKeyable from './_isKeyable';
  * @memberOf MapCache
  * @param {string} key The key of the value to set.
  * @param {*} value The value to set.
- * @returns {Object} Returns the map cache object.
+ * @returns {Object} Returns the map cache instance.
  */
 function mapSet(key, value) {
   var data = this.__data__;

_matchesStrictComparable.js

@@ -0,0 +1,20 @@
+/**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new function.
+ */
+function matchesStrictComparable(key, srcValue) {
+  return function(object) {
+    if (object == null) {
+      return false;
+    }
+    return object[key] === srcValue &&
+      (srcValue !== undefined || (key in Object(object)));
+  };
+}
+
+export default matchesStrictComparable;

_mergeData.js

@@ -22,10 +22,11 @@ var nativeMin = Math.min;
  *
  * Merging metadata reduces the number of wrappers used to invoke a function.
  * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
- * may be applied regardless of execution order. Methods like `_.ary` and `_.rearg`
- * modify function arguments, making the order in which they are executed important,
- * preventing the merging of metadata. However, we make an exception for a safe
- * combined case where curried functions have `_.ary` and or `_.rearg` applied.
+ * may be applied regardless of execution order. Methods like `_.ary` and
+ * `_.rearg` modify function arguments, making the order in which they are
+ * executed important, preventing the merging of metadata. However, we make
+ * an exception for a safe combined case where curried functions have `_.ary`
+ * and or `_.rearg` applied.
  *
  * @private
  * @param {Array} data The destination metadata.

_mergeDefaults.js

@@ -10,7 +10,8 @@ import isObject from './isObject';
  * @param {string} key The key of the property to merge.
  * @param {Object} object The parent object of `objValue`.
  * @param {Object} source The parent object of `srcValue`.
- * @param {Object} [stack] Tracks traversed source values and their merged counterparts.
+ * @param {Object} [stack] Tracks traversed source values and their merged
+ *  counterparts.
  * @returns {*} Returns the value to assign.
  */
 function mergeDefaults(objValue, srcValue, key, object, source, stack) {

_parent.js

@@ -1,5 +1,5 @@
+import baseGet from './_baseGet';
 import baseSlice from './_baseSlice';
-import get from './get';
 
 /**
  * Gets the parent value at `path` of `object`.
@@ -10,7 +10,7 @@ import get from './get';
  * @returns {*} Returns the parent value.
  */
 function parent(object, path) {
-  return path.length == 1 ? object : get(object, baseSlice(path, 0, -1));
+  return path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
 }
 
 export default parent;

_setData.js

@@ -9,8 +9,9 @@ var HOT_COUNT = 150,
  * Sets metadata for `func`.
  *
  * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
- * period of time, it will trip its breaker and transition to an identity function
- * to avoid garbage collection pauses in V8. See [V8 issue 2070](https://code.google.com/p/v8/issues/detail?id=2070)
+ * period of time, it will trip its breaker and transition to an identity
+ * function to avoid garbage collection pauses in V8. See
+ * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
  * for more details.
  *
  * @private

_stackSet.js

@@ -12,7 +12,7 @@ var LARGE_ARRAY_SIZE = 200;
  * @memberOf Stack
  * @param {string} key The key of the value to set.
  * @param {*} value The value to set.
- * @returns {Object} Returns the stack cache object.
+ * @returns {Object} Returns the stack cache instance.
  */
 function stackSet(key, value) {
   var data = this.__data__,

_stringToPath.js

@@ -1,3 +1,4 @@
+import memoize from './memoize';
 import toString from './toString';
 
 /** Used to match property names within property paths. */
@@ -13,12 +14,12 @@ var reEscapeChar = /\\(\\)?/g;
  * @param {string} string The string to convert.
  * @returns {Array} Returns the property path array.
  */
-function stringToPath(string) {
+var stringToPath = memoize(function(string) {
   var result = [];
   toString(string).replace(rePropName, function(match, number, quote, string) {
     result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
   });
   return result;
-}
+});
 
 export default stringToPath;

_toSource.js

@@ -0,0 +1,23 @@
+import isFunction from './isFunction';
+import toString from './toString';
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to process.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+  if (isFunction(func)) {
+    try {
+      return funcToString.call(func);
+    } catch (e) {}
+  }
+  return toString(func);
+}
+
+export default toSource;

add.js

@@ -1,8 +1,11 @@
+import createMathOperation from './_createMathOperation';
+
 /**
  * Adds two numbers.
  *
  * @static
  * @memberOf _
+ * @since 3.4.0
  * @category Math
  * @param {number} augend The first number in an addition.
  * @param {number} addend The second number in an addition.
@@ -12,18 +15,8 @@
  * _.add(6, 4);
  * // => 10
  */
-function add(augend, addend) {
-  var result;
-  if (augend === undefined && addend === undefined) {
-    return 0;
-  }
-  if (augend !== undefined) {
-    result = augend;
-  }
-  if (addend !== undefined) {
-    result = result === undefined ? addend : (result + addend);
-  }
-  return result;
-}
+var add = createMathOperation(function(augend, addend) {
+  return augend + addend;
+});
 
 export default add;

after.js

@@ -9,6 +9,7 @@ var FUNC_ERROR_TEXT = 'Expected a function';
  *
  * @static
  * @memberOf _
+ * @since 0.1.0
  * @category Function
  * @param {number} n The number of calls before `func` is invoked.
  * @param {Function} func The function to restrict.
@@ -24,7 +25,7 @@ var FUNC_ERROR_TEXT = 'Expected a function';
  * _.forEach(saves, function(type) {
  *   asyncSave({ 'type': type, 'complete': done });
  * });
- * // => logs 'done saving!' after the two async saves have completed
+ * // => Logs 'done saving!' after the two async saves have completed.
  */
 function after(n, func) {
   if (typeof func != 'function') {

ary.js

@@ -4,15 +4,16 @@ import createWrapper from './_createWrapper';
 var ARY_FLAG = 128;
 
 /**
- * Creates a function that accepts up to `n` arguments, ignoring any
- * additional arguments.
+ * Creates a function that invokes `func`, with up to `n` arguments,
+ * ignoring any additional arguments.
  *
  * @static
  * @memberOf _
+ * @since 3.0.0
  * @category Function
  * @param {Function} func The function to cap arguments for.
  * @param {number} [n=func.length] The arity cap.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  * @returns {Function} Returns the new function.
  * @example
  *

assign.js

@@ -18,15 +18,16 @@ var propertyIsEnumerable = objectProto.propertyIsEnumerable;
 var nonEnumShadows = !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf');
 
 /**
- * Assigns own enumerable properties of source objects to the destination
- * object. Source objects are applied from left to right. Subsequent sources
- * overwrite property assignments of previous sources.
+ * Assigns own enumerable string keyed properties of source objects to the
+ * destination object. Source objects are applied from left to right.
+ * Subsequent sources overwrite property assignments of previous sources.
  *
  * **Note:** This method mutates `object` and is loosely based on
  * [`Object.assign`](https://mdn.io/Object/assign).
  *
  * @static
  * @memberOf _
+ * @since 0.10.0
  * @category Object
  * @param {Object} object The destination object.
  * @param {...Object} [sources] The source objects.

assignIn.js

@@ -22,6 +22,7 @@ var nonEnumShadows = !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf');
  *
  * @static
  * @memberOf _
+ * @since 4.0.0
  * @alias extend
  * @category Object
  * @param {Object} object The destination object.

assignInWith.js

@@ -3,15 +3,16 @@ import createAssigner from './_createAssigner';
 import keysIn from './keysIn';
 
 /**
- * This method is like `_.assignIn` except that it accepts `customizer` which
- * is invoked to produce the assigned values. If `customizer` returns `undefined`
- * assignment is handled by the method instead. The `customizer` is invoked
- * with five arguments: (objValue, srcValue, key, object, source).
+ * This method is like `_.assignIn` except that it accepts `customizer`
+ * which is invoked to produce the assigned values. If `customizer` returns
+ * `undefined` assignment is handled by the method instead. The `customizer`
+ * is invoked with five arguments: (objValue, srcValue, key, object, source).
  *
  * **Note:** This method mutates `object`.
  *
  * @static
  * @memberOf _
+ * @since 4.0.0
  * @alias extendWith
  * @category Object
  * @param {Object} object The destination object.

assignWith.js

@@ -3,15 +3,16 @@ import createAssigner from './_createAssigner';
 import keys from './keys';
 
 /**
- * This method is like `_.assign` except that it accepts `customizer` which
- * is invoked to produce the assigned values. If `customizer` returns `undefined`
- * assignment is handled by the method instead. The `customizer` is invoked
- * with five arguments: (objValue, srcValue, key, object, source).
+ * This method is like `_.assign` except that it accepts `customizer`
+ * which is invoked to produce the assigned values. If `customizer` returns
+ * `undefined` assignment is handled by the method instead. The `customizer`
+ * is invoked with five arguments: (objValue, srcValue, key, object, source).
  *
  * **Note:** This method mutates `object`.
  *
  * @static
  * @memberOf _
+ * @since 4.0.0
  * @category Object
  * @param {Object} object The destination object.
  * @param {...Object} sources The source objects.

at.js

@@ -7,6 +7,7 @@ import rest from './rest';
  *
  * @static
  * @memberOf _
+ * @since 1.0.0
  * @category Object
  * @param {Object} object The object to iterate over.
  * @param {...(string|string[])} [paths] The property paths of elements to pick,

attempt.js

@@ -8,8 +8,10 @@ import rest from './rest';
  *
  * @static
  * @memberOf _
+ * @since 3.0.0
  * @category Util
  * @param {Function} func The function to attempt.
+ * @param {...*} [args] The arguments to invoke `func` with.
  * @returns {*} Returns the `func` result or error object.
  * @example
  *