Bump to v4.15.0.

README.md

@@ -1,4 +1,4 @@
-# lodash-es v4.14.0
+# lodash-es v4.15.0
 
 The [Lodash](https://lodash.com/) library exported as [ES](http://www.ecma-international.org/ecma-262/6.0/) modules.
 
@@ -7,4 +7,4 @@ Generated using [lodash-cli](https://www.npmjs.com/package/lodash-cli):
 $ lodash modularize exports=es -o ./
 ```
 
-See the [package source](https://github.com/lodash/lodash/tree/4.14.0-es) for more details.
+See the [package source](https://github.com/lodash/lodash/tree/4.15.0-es) for more details.

_Reflect.js

@@ -1,6 +0,0 @@
-import root from './_root.js';
-
-/** Built-in value references. */
-var Reflect = root.Reflect;
-
-export default Reflect;

_arrayIncludes.js

@@ -5,7 +5,7 @@ import baseIndexOf from './_baseIndexOf.js';
  * specifying an index to search from.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
  */

_arrayIncludesWith.js

@@ -2,7 +2,7 @@
  * This function is like `arrayIncludes` except that it accepts a comparator.
  *
  * @private
- * @param {Array} [array] The array to search.
+ * @param {Array} [array] The array to inspect.
  * @param {*} target The value to search for.
  * @param {Function} comparator The comparator invoked per element.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.

_arrayLikeKeys.js

@@ -0,0 +1,39 @@
+import baseTimes from './_baseTimes.js';
+import isArguments from './isArguments.js';
+import isArray from './isArray.js';
+import isIndex from './_isIndex.js';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Creates an array of the enumerable property names of the array-like `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @param {boolean} inherited Specify returning inherited property names.
+ * @returns {Array} Returns the array of property names.
+ */
+function arrayLikeKeys(value, inherited) {
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
+  // Safari 9 makes `arguments.length` enumerable in strict mode.
+  var result = (isArray(value) || isArguments(value))
+    ? baseTimes(value.length, String)
+    : [];
+
+  var length = result.length,
+      skipIndexes = !!length;
+
+  for (var key in value) {
+    if ((inherited || hasOwnProperty.call(value, key)) &&
+        !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+export default arrayLikeKeys;

_asciiSize.js

@@ -0,0 +1,12 @@
+import baseProperty from './_baseProperty.js';
+
+/**
+ * Gets the size of an ASCII `string`.
+ *
+ * @private
+ * @param {string} string The string inspect.
+ * @returns {number} Returns the string size.
+ */
+var asciiSize = baseProperty('length');
+
+export default 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('');
+}
+
+export default 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) || [];
+}
+
+export default asciiWords;

_assignValue.js

@@ -8,7 +8,7 @@ var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Assigns `value` to `key` of `object` if the existing value is not equivalent
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * for equality comparisons.
  *
  * @private

_assocIndexOf.js

@@ -4,7 +4,7 @@ import eq from './eq.js';
  * 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`.
  */

_baseClone.js

@@ -133,9 +133,6 @@ function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
     // Recursively populate clone (susceptible to call stack limits).
     assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
   });
-  if (!isFull) {
-    stack['delete'](value);
-  }
   return result;
 }
 

_baseConformsTo.js

@@ -11,14 +11,13 @@ function baseConformsTo(object, source, props) {
   if (object == null) {
     return !length;
   }
-  var index = length;
-  while (index--) {
-    var key = props[index],
+  object = Object(object);
+  while (length--) {
+    var key = props[length],
         predicate = source[key],
         value = object[key];
 
-    if ((value === undefined &&
-        !(key in Object(object))) || !predicate(value)) {
+    if ((value === undefined && !(key in object)) || !predicate(value)) {
       return false;
     }
   }

_baseDelay.js

@@ -9,7 +9,7 @@ var FUNC_ERROR_TEXT = 'Expected a function';
  * @param {Function} func The function to delay.
  * @param {number} wait The number of milliseconds to delay invocation.
  * @param {Array} args The arguments to provide to `func`.
- * @returns {number} Returns the timer id.
+ * @returns {number|Object} Returns the timer id or timeout object.
  */
 function baseDelay(func, wait, args) {
   if (typeof func != 'function') {

_baseFindIndex.js

@@ -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

@@ -3,7 +3,7 @@ var objectProto = Object.prototype;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;

_baseHas.js

@@ -1,5 +1,3 @@
-import getPrototype from './_getPrototype.js';
-
 /** Used for built-in method references. */
 var objectProto = Object.prototype;
 
@@ -15,12 +13,7 @@ var hasOwnProperty = objectProto.hasOwnProperty;
  * @returns {boolean} Returns `true` if `key` exists, else `false`.
  */
 function baseHas(object, key) {
-  // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
-  // that are composed entirely of index properties, return `false` for
-  // `hasOwnProperty` checks of them.
-  return object != null &&
-    (hasOwnProperty.call(object, key) ||
-      (typeof object == 'object' && key in object && getPrototype(object) === null));
+  return object != null && hasOwnProperty.call(object, key);
 }
 
 export default baseHas;

_baseIndexOf.js

@@ -5,7 +5,7 @@ import baseIsNaN from './_baseIsNaN.js';
  * 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`.

_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.

_baseIsArrayBuffer.js

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

_baseIsDate.js

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

_baseIsNative.js

@@ -6,7 +6,7 @@ import toSource from './_toSource.js';
 
 /**
  * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
 
@@ -14,10 +14,11 @@ 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;

_baseIsRegExp.js

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

_baseIsTypedArray.js

@@ -49,7 +49,7 @@ var objectProto = Object.prototype;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;

_baseKeys.js

@@ -1,16 +1,30 @@
-import overArg from './_overArg.js';
+import isPrototype from './_isPrototype.js';
+import nativeKeys from './_nativeKeys.js';
 
-/* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeKeys = Object.keys;
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
- * The base implementation of `_.keys` which doesn't skip the constructor
- * property of prototypes or treat sparse arrays as dense.
+ * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
  *
  * @private
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of property names.
  */
-var baseKeys = overArg(nativeKeys, Object);
+function baseKeys(object) {
+  if (!isPrototype(object)) {
+    return nativeKeys(object);
+  }
+  var result = [];
+  for (var key in Object(object)) {
+    if (hasOwnProperty.call(object, key) && key != 'constructor') {
+      result.push(key);
+    }
+  }
+  return result;
+}
 
 export default baseKeys;

_baseKeysIn.js

@@ -1,36 +1,33 @@
-import Reflect from './_Reflect.js';
-import iteratorToArray from './_iteratorToArray.js';
+import isObject from './isObject.js';
+import isPrototype from './_isPrototype.js';
+import nativeKeysIn from './_nativeKeysIn.js';
 
 /** Used for built-in method references. */
 var objectProto = Object.prototype;
 
-/** Built-in value references. */
-var enumerate = Reflect ? Reflect.enumerate : undefined,
-    propertyIsEnumerable = objectProto.propertyIsEnumerable;
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
- * The base implementation of `_.keysIn` which doesn't skip the constructor
- * property of prototypes or treat sparse arrays as dense.
+ * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
  *
  * @private
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of property names.
  */
 function baseKeysIn(object) {
-  object = object == null ? object : Object(object);
+  if (!isObject(object)) {
+    return nativeKeysIn(object);
+  }
+  var isProto = isPrototype(object),
+      result = [];
 
-  var result = [];
   for (var key in object) {
-    result.push(key);
+    if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
+      result.push(key);
+    }
   }
   return result;
 }
 
-// Fallback for IE < 9 with es6-shim.
-if (enumerate && !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf')) {
-  baseKeysIn = function(object) {
-    return iteratorToArray(enumerate(object));
-  };
-}
-
 export default baseKeysIn;

_baseMerge.js

@@ -1,11 +1,11 @@
 import Stack from './_Stack.js';
 import arrayEach from './_arrayEach.js';
 import assignMergeValue from './_assignMergeValue.js';
+import baseKeysIn from './_baseKeysIn.js';
 import baseMergeDeep from './_baseMergeDeep.js';
 import isArray from './isArray.js';
 import isObject from './isObject.js';
 import isTypedArray from './isTypedArray.js';
-import keysIn from './keysIn.js';
 
 /**
  * The base implementation of `_.merge` without support for multiple sources.
@@ -23,7 +23,7 @@ function baseMerge(object, source, srcIndex, customizer, stack) {
     return;
   }
   if (!(isArray(source) || isTypedArray(source))) {
-    var props = keysIn(source);
+    var props = baseKeysIn(source);
   }
   arrayEach(props || source, function(srcValue, key) {
     if (props) {

_baseSet.js

@@ -9,13 +9,16 @@ import toKey from './_toKey.js';
  * The base implementation of `_.set`.
  *
  * @private
- * @param {Object} object The object to query.
+ * @param {Object} object The object to modify.
  * @param {Array|string} path The path of the property to set.
  * @param {*} value The value to set.
  * @param {Function} [customizer] The function to customize path creation.
  * @returns {Object} Returns `object`.
  */
 function baseSet(object, path, value, customizer) {
+  if (!isObject(object)) {
+    return object;
+  }
   path = isKey(path, object) ? [path] : castPath(path);
 
   var index = -1,
@@ -24,20 +27,19 @@ function baseSet(object, path, value, customizer) {
       nested = object;
 
   while (nested != null && ++index < length) {
-    var key = toKey(path[index]);
-    if (isObject(nested)) {
-      var newValue = value;
-      if (index != lastIndex) {
-        var objValue = nested[key];
-        newValue = customizer ? customizer(objValue, key, nested) : undefined;
-        if (newValue === undefined) {
-          newValue = objValue == null
-            ? (isIndex(path[index + 1]) ? [] : {})
-            : objValue;
-        }
+    var key = toKey(path[index]),
+        newValue = value;
+
+    if (index != lastIndex) {
+      var objValue = nested[key];
+      newValue = customizer ? customizer(objValue, key, nested) : undefined;
+      if (newValue === undefined) {
+        newValue = isObject(objValue)
+          ? objValue
+          : (isIndex(path[index + 1]) ? [] : {});
       }
-      assignValue(nested, key, newValue);
     }
+    assignValue(nested, key, newValue);
     nested = nested[key];
   }
   return object;

_baseUnset.js

@@ -1,10 +1,15 @@
-import baseHas from './_baseHas.js';
 import castPath from './_castPath.js';
 import isKey from './_isKey.js';
 import last from './last.js';
 import parent from './_parent.js';
 import toKey from './_toKey.js';
 
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
 /**
  * The base implementation of `_.unset`.
  *
@@ -18,7 +23,7 @@ function baseUnset(object, path) {
   object = parent(object, path);
 
   var key = toKey(last(path));
-  return !(object != null && baseHas(object, key)) || delete object[key];
+  return !(object != null && hasOwnProperty.call(object, key)) || delete object[key];
 }
 
 export default baseUnset;

_baseUpdate.js

@@ -5,7 +5,7 @@ import baseSet from './_baseSet.js';
  * 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.

_createCaseFirst.js

@@ -1,5 +1,5 @@
 import castSlice from './_castSlice.js';
-import reHasComplexSymbol from './_reHasComplexSymbol.js';
+import hasUnicode from './_hasUnicode.js';
 import stringToArray from './_stringToArray.js';
 import toString from './toString.js';
 
@@ -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;
 

_createCtor.js

@@ -12,7 +12,7 @@ import isObject from './isObject.js';
 function createCtor(Ctor) {
   return function() {
     // Use a `switch` statement to work with class constructors. See
-    // http://ecma-international.org/ecma-262/6.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
+    // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
     // for more details.
     var args = arguments;
     switch (args.length) {

_createPadding.js

@@ -1,7 +1,7 @@
 import baseRepeat from './_baseRepeat.js';
 import baseToString from './_baseToString.js';
 import castSlice from './_castSlice.js';
-import reHasComplexSymbol from './_reHasComplexSymbol.js';
+import hasUnicode from './_hasUnicode.js';
 import stringSize from './_stringSize.js';
 import stringToArray from './_stringToArray.js';
 
@@ -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);
 }

_createRange.js

@@ -1,6 +1,6 @@
 import baseRange from './_baseRange.js';
 import isIterateeCall from './_isIterateeCall.js';
-import toNumber from './toNumber.js';
+import toFinite from './toFinite.js';
 
 /**
  * Creates a `_.range` or `_.rangeRight` function.
@@ -15,15 +15,14 @@ function createRange(fromRight) {
       end = step = undefined;
     }
     // Ensure the sign of `-0` is preserved.
-    start = toNumber(start);
-    start = start === start ? start : 0;
+    start = toFinite(start);
     if (end === undefined) {
       end = start;
       start = 0;
     } else {
-      end = toNumber(end) || 0;
+      end = toFinite(end);
     }
-    step = step === undefined ? (start < end ? 1 : -1) : (toNumber(step) || 0);
+    step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
     return baseRange(start, end, step, fromRight);
   };
 }

_deburrLetter.js

@@ -1,15 +1,16 @@
 import basePropertyOf from './_basePropertyOf.js';
 
-/** 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': 'ss'
 };
 
 /**
- * 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.

_equalArrays.js

@@ -76,6 +76,7 @@ function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
     }
   }
   stack['delete'](array);
+  stack['delete'](other);
   return result;
 }
 

_equalByTag.js

@@ -75,7 +75,7 @@ function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
     case regexpTag:
     case stringTag:
       // Coerce regexes to strings and treat strings, primitives and objects,
-      // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
+      // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
       // for more details.
       return object == (other + '');
 

_equalObjects.js

@@ -1,9 +1,14 @@
-import baseHas from './_baseHas.js';
 import keys from './keys.js';
 
 /** Used to compose bitmasks for comparison styles. */
 var PARTIAL_COMPARE_FLAG = 2;
 
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
 /**
  * A specialized version of `baseIsEqualDeep` for objects with support for
  * partial deep comparisons.
@@ -31,7 +36,7 @@ function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
   var index = objLength;
   while (index--) {
     var key = objProps[index];
-    if (!(isPartial ? key in other : baseHas(other, key))) {
+    if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
       return false;
     }
   }
@@ -78,6 +83,7 @@ function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
     }
   }
   stack['delete'](object);
+  stack['delete'](other);
   return result;
 }
 

_getLength.js

@@ -1,16 +0,0 @@
-import baseProperty from './_baseProperty.js';
-
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a
- * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
- * Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
-export default getLength;

_getPrototype.js

@@ -1,15 +1,6 @@
 import overArg from './_overArg.js';
 
-/* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeGetPrototype = Object.getPrototypeOf;
-
-/**
- * Gets the `[[Prototype]]` of `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {null|Object} Returns the `[[Prototype]]`.
- */
-var getPrototype = overArg(nativeGetPrototype, Object);
+/** Built-in value references. */
+var getPrototype = overArg(Object.getPrototypeOf, Object);
 
 export default getPrototype;

_getSymbolsIn.js

@@ -1,6 +1,7 @@
 import arrayPush from './_arrayPush.js';
 import getPrototype from './_getPrototype.js';
 import getSymbols from './_getSymbols.js';
+import stubArray from './stubArray.js';
 
 /* Built-in method references for those with the same name as other `lodash` methods. */
 var nativeGetSymbols = Object.getOwnPropertySymbols;
@@ -13,7 +14,7 @@ var nativeGetSymbols = Object.getOwnPropertySymbols;
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of symbols.
  */
-var getSymbolsIn = !nativeGetSymbols ? getSymbols : function(object) {
+var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
   var result = [];
   while (object) {
     arrayPush(result, getSymbols(object));

_getTag.js

@@ -20,7 +20,7 @@ var objectProto = Object.prototype;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -42,7 +42,7 @@ 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.
+// for data views in Edge < 14, and promises in Node.js.
 if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
     (Map && getTag(new Map) != mapTag) ||
     (Promise && getTag(Promise.resolve()) != promiseTag) ||

_hasPath.js

@@ -4,7 +4,6 @@ import isArray from './isArray.js';
 import isIndex from './_isIndex.js';
 import isKey from './_isKey.js';
 import isLength from './isLength.js';
-import isString from './isString.js';
 import toKey from './_toKey.js';
 
 /**
@@ -35,7 +34,7 @@ function hasPath(object, path, hasFunc) {
   }
   var length = object ? object.length : 0;
   return !!length && isLength(length) && isIndex(key, length) &&
-    (isArray(object) || isString(object) || isArguments(object));
+    (isArray(object) || isArguments(object));
 }
 
 export default 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 + ']');
 
-export default 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);
+}
+
+export default 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);
+}
+
+export default hasUnicodeWord;

_indexKeys.js

@@ -1,24 +0,0 @@
-import baseTimes from './_baseTimes.js';
-import isArguments from './isArguments.js';
-import isArray from './isArray.js';
-import isLength from './isLength.js';
-import isString from './isString.js';
-
-/**
- * Creates an array of index keys for `object` values of arrays,
- * `arguments` objects, and strings, otherwise `null` is returned.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array|null} Returns index keys, else `null`.
- */
-function indexKeys(object) {
-  var length = object ? object.length : undefined;
-  if (isLength(length) &&
-      (isArray(object) || isString(object) || isArguments(object))) {
-    return baseTimes(length, String);
-  }
-  return null;
-}
-
-export default indexKeys;

_isFlattenable.js

@@ -14,7 +14,7 @@ var spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined;
  */
 function isFlattenable(value) {
   return isArray(value) || isArguments(value) ||
-    !!(spreadableSymbol && value && value[spreadableSymbol])
+    !!(spreadableSymbol && value && value[spreadableSymbol]);
 }
 
 export default isFlattenable;

_nativeKeys.js

@@ -0,0 +1,6 @@
+import overArg from './_overArg.js';
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeKeys = overArg(Object.keys, Object);
+
+export default nativeKeys;

_nativeKeysIn.js

@@ -0,0 +1,20 @@
+/**
+ * This function is like
+ * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+ * except that it includes inherited enumerable properties.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+function nativeKeysIn(object) {
+  var result = [];
+  if (object != null) {
+    for (var key in Object(object)) {
+      result.push(key);
+    }
+  }
+  return result;
+}
+
+export default nativeKeysIn;

_nodeUtil.js

@@ -1,10 +1,10 @@
 import freeGlobal from './_freeGlobal.js';
 
 /** Detect free variable `exports`. */
-var freeExports = freeGlobal && typeof exports == 'object' && exports;
+var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
 
 /** Detect free variable `module`. */
-var freeModule = freeExports && typeof module == 'object' && module;
+var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
 
 /** Detect the popular CommonJS extension `module.exports`. */
 var moduleExports = freeModule && freeModule.exports === freeExports;

_overArg.js

@@ -1,5 +1,5 @@
 /**
- * Creates a function that invokes `func` with its first argument transformed.
+ * Creates a unary function that invokes `func` with its argument transformed.
  *
  * @private
  * @param {Function} func The function to wrap.

_stringSize.js

@@ -1,30 +1,6 @@
-import reHasComplexSymbol from './_reHasComplexSymbol.js';
-
-/** Used to compose unicode character classes. */
-var rsAstralRange = '\\ud800-\\udfff',
-    rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23',
-    rsComboSymbolsRange = '\\u20d0-\\u20f0',
-    rsVarRange = '\\ufe0e\\ufe0f';
-
-/** Used to compose unicode capture groups. */
-var rsAstral = '[' + rsAstralRange + ']',
-    rsCombo = '[' + rsComboMarksRange + rsComboSymbolsRange + ']',
-    rsFitz = '\\ud83c[\\udffb-\\udfff]',
-    rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
-    rsNonAstral = '[^' + rsAstralRange + ']',
-    rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
-    rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
-    rsZWJ = '\\u200d';
-
-/** Used to compose unicode regexes. */
-var reOptMod = rsModifier + '?',
-    rsOptVar = '[' + rsVarRange + ']?',
-    rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
-    rsSeq = rsOptVar + reOptMod + rsOptJoin,
-    rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
-
-/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
-var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
+import asciiSize from './_asciiSize.js';
+import hasUnicode from './_hasUnicode.js';
+import unicodeSize from './_unicodeSize.js';
 
 /**
  * Gets the number of symbols in `string`.
@@ -34,14 +10,9 @@ var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq,
  * @returns {number} Returns the string size.
  */
 function stringSize(string) {
-  if (!(string && reHasComplexSymbol.test(string))) {
-    return string.length;
-  }
-  var result = reComplexSymbol.lastIndex = 0;
-  while (reComplexSymbol.test(string)) {
-    result++;
-  }
-  return result;
+  return hasUnicode(string)
+    ? unicodeSize(string)
+    : asciiSize(string);
 }
 
 export default stringSize;

_stringToArray.js

@@ -1,28 +1,6 @@
-/** Used to compose unicode character classes. */
-var rsAstralRange = '\\ud800-\\udfff',
-    rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23',
-    rsComboSymbolsRange = '\\u20d0-\\u20f0',
-    rsVarRange = '\\ufe0e\\ufe0f';
-
-/** Used to compose unicode capture groups. */
-var rsAstral = '[' + rsAstralRange + ']',
-    rsCombo = '[' + rsComboMarksRange + rsComboSymbolsRange + ']',
-    rsFitz = '\\ud83c[\\udffb-\\udfff]',
-    rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
-    rsNonAstral = '[^' + rsAstralRange + ']',
-    rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
-    rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
-    rsZWJ = '\\u200d';
-
-/** Used to compose unicode regexes. */
-var reOptMod = rsModifier + '?',
-    rsOptVar = '[' + rsVarRange + ']?',
-    rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
-    rsSeq = rsOptVar + reOptMod + rsOptJoin,
-    rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
-
-/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
-var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
+import asciiToArray from './_asciiToArray.js';
+import hasUnicode from './_hasUnicode.js';
+import unicodeToArray from './_unicodeToArray.js';
 
 /**
  * Converts `string` to an array.
@@ -32,7 +10,9 @@ var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq,
  * @returns {Array} Returns the converted array.
  */
 function stringToArray(string) {
-  return string.match(reComplexSymbol);
+  return hasUnicode(string)
+    ? unicodeToArray(string)
+    : asciiToArray(string);
 }
 
 export default stringToArray;

_stringToPath.js

@@ -2,7 +2,8 @@ import memoize from './memoize.js';
 import toString from './toString.js';
 
 /** Used to match property names within property paths. */
-var rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
+var reLeadingDot = /^\./,
+    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;
 
 /** Used to match backslashes in property paths. */
 var reEscapeChar = /\\(\\)?/g;
@@ -15,8 +16,13 @@ var reEscapeChar = /\\(\\)?/g;
  * @returns {Array} Returns the property path array.
  */
 var stringToPath = memoize(function(string) {
+  string = toString(string);
+
   var result = [];
-  toString(string).replace(rePropName, function(match, number, quote, string) {
+  if (reLeadingDot.test(string)) {
+    result.push('');
+  }
+  string.replace(rePropName, function(match, number, quote, string) {
     result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
   });
   return result;

_toSource.js

@@ -1,5 +1,8 @@
+/** Used for built-in method references. */
+var funcProto = Function.prototype;
+
 /** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
+var funcToString = funcProto.toString;
 
 /**
  * Converts `func` to its source code.

_unicodeSize.js

@@ -0,0 +1,42 @@
+/** Used to compose unicode character classes. */
+var rsAstralRange = '\\ud800-\\udfff',
+    rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23',
+    rsComboSymbolsRange = '\\u20d0-\\u20f0',
+    rsVarRange = '\\ufe0e\\ufe0f';
+
+/** Used to compose unicode capture groups. */
+var rsAstral = '[' + rsAstralRange + ']',
+    rsCombo = '[' + rsComboMarksRange + rsComboSymbolsRange + ']',
+    rsFitz = '\\ud83c[\\udffb-\\udfff]',
+    rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
+    rsNonAstral = '[^' + rsAstralRange + ']',
+    rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
+    rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
+    rsZWJ = '\\u200d';
+
+/** Used to compose unicode regexes. */
+var reOptMod = rsModifier + '?',
+    rsOptVar = '[' + rsVarRange + ']?',
+    rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
+    rsSeq = rsOptVar + reOptMod + rsOptJoin,
+    rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
+
+/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
+var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
+
+/**
+ * Gets the size of a Unicode `string`.
+ *
+ * @private
+ * @param {string} string The string inspect.
+ * @returns {number} Returns the string size.
+ */
+function unicodeSize(string) {
+  var result = reUnicode.lastIndex = 0;
+  while (reUnicode.test(string)) {
+    result++;
+  }
+  return result;
+}
+
+export default unicodeSize;

_unicodeToArray.js

@@ -0,0 +1,38 @@
+/** Used to compose unicode character classes. */
+var rsAstralRange = '\\ud800-\\udfff',
+    rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23',
+    rsComboSymbolsRange = '\\u20d0-\\u20f0',
+    rsVarRange = '\\ufe0e\\ufe0f';
+
+/** Used to compose unicode capture groups. */
+var rsAstral = '[' + rsAstralRange + ']',
+    rsCombo = '[' + rsComboMarksRange + rsComboSymbolsRange + ']',
+    rsFitz = '\\ud83c[\\udffb-\\udfff]',
+    rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
+    rsNonAstral = '[^' + rsAstralRange + ']',
+    rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
+    rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
+    rsZWJ = '\\u200d';
+
+/** Used to compose unicode regexes. */
+var reOptMod = rsModifier + '?',
+    rsOptVar = '[' + rsVarRange + ']?',
+    rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
+    rsSeq = rsOptVar + reOptMod + rsOptJoin,
+    rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
+
+/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
+var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
+
+/**
+ * Converts a Unicode `string` to an array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the converted array.
+ */
+function unicodeToArray(string) {
+  return string.match(reUnicode) || [];
+}
+
+export default unicodeToArray;

_unicodeWords.js

@@ -0,0 +1,63 @@
+/** Used to compose unicode character classes. */
+var rsAstralRange = '\\ud800-\\udfff',
+    rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23',
+    rsComboSymbolsRange = '\\u20d0-\\u20f0',
+    rsDingbatRange = '\\u2700-\\u27bf',
+    rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
+    rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
+    rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
+    rsPunctuationRange = '\\u2000-\\u206f',
+    rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000',
+    rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
+    rsVarRange = '\\ufe0e\\ufe0f',
+    rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;
+
+/** Used to compose unicode capture groups. */
+var rsApos = "['\u2019]",
+    rsBreak = '[' + rsBreakRange + ']',
+    rsCombo = '[' + rsComboMarksRange + rsComboSymbolsRange + ']',
+    rsDigits = '\\d+',
+    rsDingbat = '[' + rsDingbatRange + ']',
+    rsLower = '[' + rsLowerRange + ']',
+    rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
+    rsFitz = '\\ud83c[\\udffb-\\udfff]',
+    rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
+    rsNonAstral = '[^' + rsAstralRange + ']',
+    rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
+    rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
+    rsUpper = '[' + rsUpperRange + ']',
+    rsZWJ = '\\u200d';
+
+/** Used to compose unicode regexes. */
+var rsLowerMisc = '(?:' + rsLower + '|' + rsMisc + ')',
+    rsUpperMisc = '(?:' + rsUpper + '|' + rsMisc + ')',
+    rsOptLowerContr = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
+    rsOptUpperContr = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
+    reOptMod = rsModifier + '?',
+    rsOptVar = '[' + rsVarRange + ']?',
+    rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
+    rsSeq = rsOptVar + reOptMod + rsOptJoin,
+    rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq;
+
+/** Used to match complex or compound words. */
+var reUnicodeWord = RegExp([
+  rsUpper + '?' + rsLower + '+' + rsOptLowerContr + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
+  rsUpperMisc + '+' + rsOptUpperContr + '(?=' + [rsBreak, rsUpper + rsLowerMisc, '$'].join('|') + ')',
+  rsUpper + '?' + rsLowerMisc + '+' + rsOptLowerContr,
+  rsUpper + '+' + rsOptUpperContr,
+  rsDigits,
+  rsEmoji
+].join('|'), 'g');
+
+/**
+ * Splits a Unicode `string` into an array of its words.
+ *
+ * @private
+ * @param {string} The string to inspect.
+ * @returns {Array} Returns the words of `string`.
+ */
+function unicodeWords(string) {
+  return string.match(reUnicodeWord) || [];
+}
+
+export default unicodeWords;

assignIn.js

@@ -1,19 +1,7 @@
-import assignValue from './_assignValue.js';
 import copyObject from './_copyObject.js';
 import createAssigner from './_createAssigner.js';
-import isArrayLike from './isArrayLike.js';
-import isPrototype from './_isPrototype.js';
 import keysIn from './keysIn.js';
 
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
-
-/** Built-in value references. */
-var propertyIsEnumerable = objectProto.propertyIsEnumerable;
-
-/** Detect if properties shadowing those on `Object.prototype` are non-enumerable. */
-var nonEnumShadows = !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf');
-
 /**
  * This method is like `_.assign` except that it iterates over own and
  * inherited source properties.
@@ -46,13 +34,7 @@ var nonEnumShadows = !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf');
  * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
  */
 var assignIn = createAssigner(function(object, source) {
-  if (nonEnumShadows || isPrototype(source) || isArrayLike(source)) {
-    copyObject(source, keysIn(source), object);
-    return;
-  }
-  for (var key in source) {
-    assignValue(object, key, source[key]);
-  }
+  copyObject(source, keysIn(source), object);
 });
 
 export default assignIn;

conforms.js

@@ -6,6 +6,9 @@ import baseConforms from './_baseConforms.js';
  * the corresponding property values of a given object, returning `true` if
  * all predicates return truthy, else `false`.
  *
+ * **Note:** The created function is equivalent to `_.conformsTo` with
+ * `source` partially applied.
+ *
  * @static
  * @memberOf _
  * @since 4.0.0

conformsTo.js

@@ -2,9 +2,11 @@ import baseConformsTo from './_baseConformsTo.js';
 import keys from './keys.js';
 
 /**
- * Checks if `object` conforms to `source` by invoking the predicate properties
- * of `source` with the corresponding property values of `object`. This method
- * is equivalent to a `_.conforms` function when `source` is partially applied.
+ * Checks if `object` conforms to `source` by invoking the predicate
+ * properties of `source` with the corresponding property values of `object`.
+ *
+ * **Note:** This method is equivalent to `_.conforms` when `source` is
+ * partially applied.
  *
  * @static
  * @memberOf _

debounce.js

@@ -14,14 +14,18 @@ var nativeMax = Math.max,
  * milliseconds have elapsed since the last time the debounced function was
  * invoked. The debounced function comes with a `cancel` method to cancel
  * delayed `func` invocations and a `flush` method to immediately invoke them.
- * Provide an options object to indicate whether `func` should be invoked on
- * the leading and/or trailing edge of the `wait` timeout. The `func` is invoked
- * with the last arguments provided to the debounced function. Subsequent calls
- * to the debounced function return the result of the last `func` invocation.
+ * Provide `options` to indicate whether `func` should be invoked on the
+ * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
+ * with the last arguments provided to the debounced function. Subsequent
+ * calls to the debounced function return the result of the last `func`
+ * invocation.
  *
- * **Note:** If `leading` and `trailing` options are `true`, `func` is invoked
- * on the trailing edge of the timeout only if the debounced function is
- * invoked more than once during the `wait` timeout.
+ * **Note:** If `leading` and `trailing` options are `true`, `func` is
+ * invoked on the trailing edge of the timeout only if the debounced function
+ * is invoked more than once during the `wait` timeout.
+ *
+ * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+ * until to the next tick, similar to `setTimeout` with a timeout of `0`.
  *
  * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
  * for details over the differences between `_.debounce` and `_.throttle`.

deburr.js

@@ -1,8 +1,8 @@
 import deburrLetter from './_deburrLetter.js';
 import toString from './toString.js';
 
-/** Used to match latin-1 supplementary letters (excluding mathematical operators). */
-var reLatin1 = /[\xc0-\xd6\xd8-\xde\xdf-\xf6\xf8-\xff]/g;
+/** Used to match Latin Unicode letters (excluding mathematical operators). */
+var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;
 
 /** Used to compose unicode character classes. */
 var rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23',
@@ -19,8 +19,9 @@ var reComboMark = RegExp(rsCombo, 'g');
 
 /**
  * Deburrs `string` by converting
- * [latin-1 supplementary letters](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
- * to basic latin letters and removing
+ * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
+ * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
+ * letters to basic Latin letters and removing
  * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
  *
  * @static
@@ -36,7 +37,7 @@ var reComboMark = RegExp(rsCombo, 'g');
  */
 function deburr(string) {
   string = toString(string);
-  return string && string.replace(reLatin1, deburrLetter).replace(reComboMark, '');
+  return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
 }
 
 export default deburr;

difference.js

@@ -5,7 +5,7 @@ import isArrayLikeObject from './isArrayLikeObject.js';
 
 /**
  * Creates an array of `array` values not included in the other given arrays
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * for equality comparisons. The order of result values is determined by the
  * order they occur in the first array.
  *

endsWith.js

@@ -10,7 +10,7 @@ import toString from './toString.js';
  * @memberOf _
  * @since 3.0.0
  * @category String
- * @param {string} [string=''] The string to search.
+ * @param {string} [string=''] The string to inspect.
  * @param {string} [target] The string to search for.
  * @param {number} [position=string.length] The position to search up to.
  * @returns {boolean} Returns `true` if `string` ends with `target`,

eq.js

@@ -1,6 +1,6 @@
 /**
  * Performs a
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * comparison between two values to determine if they are equivalent.
  *
  * @static

escapeRegExp.js

@@ -2,7 +2,7 @@ import toString from './toString.js';
 
 /**
  * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  */
 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
     reHasRegExpChar = RegExp(reRegExpChar.source);

every.js

@@ -9,6 +9,11 @@ import isIterateeCall from './_isIterateeCall.js';
  * Iteration is stopped once `predicate` returns falsey. The predicate is
  * invoked with three arguments: (value, index|key, collection).
  *
+ * **Note:** This method returns `true` for
+ * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
+ * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
+ * elements of empty collections.
+ *
  * @static
  * @memberOf _
  * @since 0.1.0

find.js

@@ -10,7 +10,7 @@ import findIndex from './findIndex.js';
  * @memberOf _
  * @since 0.1.0
  * @category Collection
- * @param {Array|Object} collection The collection to search.
+ * @param {Array|Object} collection The collection to inspect.
  * @param {Function} [predicate=_.identity]
  *  The function invoked per iteration.
  * @param {number} [fromIndex=0] The index to search from.

findIndex.js

@@ -13,7 +13,7 @@ var nativeMax = Math.max;
  * @memberOf _
  * @since 1.1.0
  * @category Array
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {Function} [predicate=_.identity]
  *  The function invoked per iteration.
  * @param {number} [fromIndex=0] The index to search from.

findKey.js

@@ -10,7 +10,7 @@ import baseIteratee from './_baseIteratee.js';
  * @memberOf _
  * @since 1.1.0
  * @category Object
- * @param {Object} object The object to search.
+ * @param {Object} object The object to inspect.
  * @param {Function} [predicate=_.identity] The function invoked per iteration.
  * @returns {string|undefined} Returns the key of the matched element,
  *  else `undefined`.

findLast.js

@@ -9,7 +9,7 @@ import findLastIndex from './findLastIndex.js';
  * @memberOf _
  * @since 2.0.0
  * @category Collection
- * @param {Array|Object} collection The collection to search.
+ * @param {Array|Object} collection The collection to inspect.
  * @param {Function} [predicate=_.identity]
  *  The function invoked per iteration.
  * @param {number} [fromIndex=collection.length-1] The index to search from.

findLastIndex.js

@@ -14,7 +14,7 @@ var nativeMax = Math.max,
  * @memberOf _
  * @since 2.0.0
  * @category Array
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {Function} [predicate=_.identity]
  *  The function invoked per iteration.
  * @param {number} [fromIndex=array.length-1] The index to search from.

findLastKey.js

@@ -10,7 +10,7 @@ import baseIteratee from './_baseIteratee.js';
  * @memberOf _
  * @since 2.0.0
  * @category Object
- * @param {Object} object The object to search.
+ * @param {Object} object The object to inspect.
  * @param {Function} [predicate=_.identity] The function invoked per iteration.
  * @returns {string|undefined} Returns the key of the matched element,
  *  else `undefined`.

inRange.js

@@ -1,4 +1,5 @@
 import baseInRange from './_baseInRange.js';
+import toFinite from './toFinite.js';
 import toNumber from './toNumber.js';
 
 /**
@@ -40,12 +41,12 @@ import toNumber from './toNumber.js';
  * // => true
  */
 function inRange(number, start, end) {
-  start = toNumber(start) || 0;
+  start = toFinite(start);
   if (end === undefined) {
     end = start;
     start = 0;
   } else {
-    end = toNumber(end) || 0;
+    end = toFinite(end);
   }
   number = toNumber(number);
   return baseInRange(number, start, end);

includes.js

@@ -10,7 +10,7 @@ var nativeMax = Math.max;
 /**
  * Checks if `value` is in `collection`. If `collection` is a string, it's
  * checked for a substring of `value`, otherwise
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * is used for equality comparisons. If `fromIndex` is negative, it's used as
  * the offset from the end of `collection`.
  *
@@ -18,7 +18,7 @@ var nativeMax = Math.max;
  * @memberOf _
  * @since 0.1.0
  * @category Collection
- * @param {Array|Object|string} collection The collection to search.
+ * @param {Array|Object|string} collection The collection to inspect.
  * @param {*} value The value to search for.
  * @param {number} [fromIndex=0] The index to search from.
  * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.

indexOf.js

@@ -6,7 +6,7 @@ var nativeMax = Math.max;
 
 /**
  * Gets the index at which the first occurrence of `value` is found in `array`
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * for equality comparisons. If `fromIndex` is negative, it's used as the
  * offset from the end of `array`.
  *
@@ -14,7 +14,7 @@ var nativeMax = Math.max;
  * @memberOf _
  * @since 0.1.0
  * @category Array
- * @param {Array} array The array to search.
+ * @param {Array} array The array to inspect.
  * @param {*} value The value to search for.
  * @param {number} [fromIndex=0] The index to search from.
  * @returns {number} Returns the index of the matched value, else `-1`.

initial.js

@@ -1,4 +1,4 @@
-import dropRight from './dropRight.js';
+import baseSlice from './_baseSlice.js';
 
 /**
  * Gets all but the last element of `array`.
@@ -15,7 +15,8 @@ import dropRight from './dropRight.js';
  * // => [1, 2]
  */
 function initial(array) {
-  return dropRight(array, 1);
+  var length = array ? array.length : 0;
+  return length ? baseSlice(array, 0, -1) : [];
 }
 
 export default initial;

intersection.js

@@ -5,7 +5,7 @@ import castArrayLikeObject from './_castArrayLikeObject.js';
 
 /**
  * Creates an array of unique values that are included in all given arrays
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  * for equality comparisons. The order of result values is determined by the
  * order they occur in the first array.
  *

isArguments.js

@@ -11,7 +11,7 @@ var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -38,7 +38,7 @@ var propertyIsEnumerable = objectProto.propertyIsEnumerable;
  * // => false
  */
 function isArguments(value) {
-  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
   return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
     (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }

isArrayLike.js

@@ -1,4 +1,3 @@
-import getLength from './_getLength.js';
 import isFunction from './isFunction.js';
 import isLength from './isLength.js';
 
@@ -28,7 +27,7 @@ import isLength from './isLength.js';
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 export default isArrayLike;

isBoolean.js

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

isBuffer.js

@@ -1,12 +1,11 @@
-import freeGlobal from './_freeGlobal.js';
 import root from './_root.js';
 import stubFalse from './stubFalse.js';
 
 /** Detect free variable `exports`. */
-var freeExports = freeGlobal && typeof exports == 'object' && exports;
+var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
 
 /** Detect free variable `module`. */
-var freeModule = freeExports && typeof module == 'object' && module;
+var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
 
 /** Detect the popular CommonJS extension `module.exports`. */
 var moduleExports = freeModule && freeModule.exports === freeExports;

isElement.js

@@ -9,8 +9,7 @@ import isPlainObject from './isPlainObject.js';
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a DOM element,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
  * @example
  *
  * _.isElement(document.body);

isEmpty.js

@@ -3,10 +3,8 @@ import isArguments from './isArguments.js';
 import isArray from './isArray.js';
 import isArrayLike from './isArrayLike.js';
 import isBuffer from './isBuffer.js';
-import isFunction from './isFunction.js';
-import isObjectLike from './isObjectLike.js';
-import isString from './isString.js';
-import keys from './keys.js';
+import isPrototype from './_isPrototype.js';
+import nativeKeys from './_nativeKeys.js';
 
 /** `Object#toString` result references. */
 var mapTag = '[object Map]',
@@ -59,22 +57,23 @@ var nonEnumShadows = !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf');
  */
 function isEmpty(value) {
   if (isArrayLike(value) &&
-      (isArray(value) || isString(value) || isFunction(value.splice) ||
-        isArguments(value) || isBuffer(value))) {
+      (isArray(value) || typeof value == 'string' ||
+        typeof value.splice == 'function' || isBuffer(value) || isArguments(value))) {
     return !value.length;
   }
-  if (isObjectLike(value)) {
-    var tag = getTag(value);
-    if (tag == mapTag || tag == setTag) {
-      return !value.size;
-    }
+  var tag = getTag(value);
+  if (tag == mapTag || tag == setTag) {
+    return !value.size;
+  }
+  if (nonEnumShadows || isPrototype(value)) {
+    return !nativeKeys(value).length;
   }
   for (var key in value) {
     if (hasOwnProperty.call(value, key)) {
       return false;
     }
   }
-  return !(nonEnumShadows && keys(value).length);
+  return true;
 }
 
 export default isEmpty;

isEqual.js

@@ -16,8 +16,7 @@ import baseIsEqual from './_baseIsEqual.js';
  * @category Lang
  * @param {*} value The value to compare.
  * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if the values are equivalent,
- *  else `false`.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  * @example
  *
  * var object = { 'a': 1 };

isEqualWith.js

@@ -13,8 +13,7 @@ import baseIsEqual from './_baseIsEqual.js';
  * @param {*} value The value to compare.
  * @param {*} other The other value to compare.
  * @param {Function} [customizer] The function to customize comparisons.
- * @returns {boolean} Returns `true` if the values are equivalent,
- *  else `false`.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  * @example
  *
  * function isGreeting(value) {

isError.js

@@ -8,7 +8,7 @@ var objectProto = Object.prototype;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -22,8 +22,7 @@ var objectToString = objectProto.toString;
  * @since 3.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an error object,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
  * @example
  *
  * _.isError(new Error);

isFinite.js

@@ -14,8 +14,7 @@ var nativeIsFinite = root.isFinite;
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a finite number,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
  * @example
  *
  * _.isFinite(3);

isFunction.js

@@ -9,7 +9,7 @@ var objectProto = Object.prototype;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -33,8 +33,7 @@ var objectToString = objectProto.toString;
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }

isLength.js

@@ -4,16 +4,15 @@ var MAX_SAFE_INTEGER = 9007199254740991;
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  * @example
  *
  * _.isLength(3);

isMatch.js

@@ -3,10 +3,14 @@ import getMatchData from './_getMatchData.js';
 
 /**
  * Performs a partial deep comparison between `object` and `source` to
- * determine if `object` contains equivalent property values. This method is
- * equivalent to a `_.matches` function when `source` is partially applied.
+ * determine if `object` contains equivalent property values.
  *
- * **Note:** This method supports comparing the same values as `_.isEqual`.
+ * **Note:** This method is equivalent to `_.matches` when `source` is
+ * partially applied.
+ *
+ * Partial comparisons will match empty array and empty object `source`
+ * values against any array or object value, respectively. See `_.isEqual`
+ * for a list of supported value comparisons.
  *
  * @static
  * @memberOf _

isNumber.js

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

isObject.js

@@ -1,6 +1,6 @@
 /**
  * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static

isPlainObject.js

@@ -6,10 +6,11 @@ import isObjectLike from './isObjectLike.js';
 var objectTag = '[object Object]';
 
 /** 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;
@@ -19,7 +20,7 @@ var objectCtorString = funcToString.call(Object);
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -33,8 +34,7 @@ var objectToString = objectProto.toString;
  * @since 0.8.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a plain object,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
  * @example
  *
  * function Foo() {

isSafeInteger.js

@@ -15,8 +15,7 @@ var MAX_SAFE_INTEGER = 9007199254740991;
  * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a safe integer,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
  * @example
  *
  * _.isSafeInteger(3);

isString.js

@@ -9,7 +9,7 @@ var objectProto = Object.prototype;
 
 /**
  * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;

isSymbol.js

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

isWeakSet.js

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

keys.js

@@ -1,15 +1,12 @@
-import baseHas from './_baseHas.js';
+import arrayLikeKeys from './_arrayLikeKeys.js';
 import baseKeys from './_baseKeys.js';
-import indexKeys from './_indexKeys.js';
 import isArrayLike from './isArrayLike.js';
-import isIndex from './_isIndex.js';
-import isPrototype from './_isPrototype.js';
 
 /**
  * Creates an array of the own enumerable property names of `object`.
  *
  * **Note:** Non-object values are coerced to objects. See the
- * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
+ * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
  * for more details.
  *
  * @static
@@ -34,23 +31,7 @@ import isPrototype from './_isPrototype.js';
  * // => ['0', '1']
  */
 function keys(object) {
-  var isProto = isPrototype(object);
-  if (!(isProto || isArrayLike(object))) {
-    return baseKeys(object);
-  }
-  var indexes = indexKeys(object),
-      skipIndexes = !!indexes,
-      result = indexes || [],
-      length = result.length;
-
-  for (var key in object) {
-    if (baseHas(object, key) &&
-        !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
-        !(isProto && key == 'constructor')) {
-      result.push(key);
-    }
-  }
-  return result;
+  return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
 }
 
 export default keys;