diff --git a/README.md b/README.md
index 14980db1a..b4141a253 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# lodash v4.12.0
+# lodash v4.13.0
 
 The [Lodash](https://lodash.com/) library exported as [Node.js](https://nodejs.org/) modules.
 
@@ -28,7 +28,7 @@ var chunk = require('lodash/chunk');
 var extend = require('lodash/fp/extend');
 ```
 
-See the [package source](https://github.com/lodash/lodash/tree/4.12.0-npm) for more details.
+See the [package source](https://github.com/lodash/lodash/tree/4.13.0-npm) for more details.
 
 **Note:**<br>
 Don’t assign values to the [special variable](http://nodejs.org/api/repl.html#repl_repl_features) `_` in the Node.js < 6 REPL.<br>
diff --git a/_arrayAggregator.js b/_arrayAggregator.js
index 562eeb392..7ca498a86 100644
--- a/_arrayAggregator.js
+++ b/_arrayAggregator.js
@@ -2,7 +2,7 @@
  * A specialized version of `baseAggregator` for arrays.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} setter The function to set `accumulator` values.
  * @param {Function} iteratee The iteratee to transform keys.
  * @param {Object} accumulator The initial aggregated object.
@@ -10,7 +10,7 @@
  */
 function arrayAggregator(array, setter, iteratee, accumulator) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     var value = array[index];
diff --git a/_arrayEach.js b/_arrayEach.js
index c302e6313..5f770bcbe 100644
--- a/_arrayEach.js
+++ b/_arrayEach.js
@@ -3,13 +3,13 @@
  * iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @returns {Array} Returns `array`.
  */
 function arrayEach(array, iteratee) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     if (iteratee(array[index], index, array) === false) {
diff --git a/_arrayEachRight.js b/_arrayEachRight.js
index 531858538..72e780ca0 100644
--- a/_arrayEachRight.js
+++ b/_arrayEachRight.js
@@ -3,12 +3,12 @@
  * iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @returns {Array} Returns `array`.
  */
 function arrayEachRight(array, iteratee) {
-  var length = array.length;
+  var length = array ? array.length : 0;
 
   while (length--) {
     if (iteratee(array[length], length, array) === false) {
diff --git a/_arrayEvery.js b/_arrayEvery.js
index 8d89fb102..f4fb4254d 100644
--- a/_arrayEvery.js
+++ b/_arrayEvery.js
@@ -3,14 +3,14 @@
  * iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @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`.
  */
 function arrayEvery(array, predicate) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     if (!predicate(array[index], index, array)) {
diff --git a/_arrayFilter.js b/_arrayFilter.js
index 7b61ba6f9..b904fda62 100644
--- a/_arrayFilter.js
+++ b/_arrayFilter.js
@@ -3,13 +3,13 @@
  * iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} predicate The function invoked per iteration.
  * @returns {Array} Returns the new filtered array.
  */
 function arrayFilter(array, predicate) {
   var index = -1,
-      length = array.length,
+      length = array ? array.length : 0,
       resIndex = 0,
       result = [];
 
diff --git a/_arrayIncludes.js b/_arrayIncludes.js
index 9574f5d1b..cf9c1f0fc 100644
--- a/_arrayIncludes.js
+++ b/_arrayIncludes.js
@@ -5,12 +5,13 @@ var baseIndexOf = require('./_baseIndexOf');
  * specifying an index to search from.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} [array] The array to search.
  * @param {*} target The value to search for.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
  */
 function arrayIncludes(array, value) {
-  return !!array.length && baseIndexOf(array, value, 0) > -1;
+  var length = array ? array.length : 0;
+  return !!length && baseIndexOf(array, value, 0) > -1;
 }
 
 module.exports = arrayIncludes;
diff --git a/_arrayIncludesWith.js b/_arrayIncludesWith.js
index 88ea23719..d08356a86 100644
--- a/_arrayIncludesWith.js
+++ b/_arrayIncludesWith.js
@@ -2,14 +2,14 @@
  * This function is like `arrayIncludes` except that it accepts a comparator.
  *
  * @private
- * @param {Array} array The array to search.
+ * @param {Array} [array] The array to search.
  * @param {*} target The value to search for.
  * @param {Function} comparator The comparator invoked per element.
  * @returns {boolean} Returns `true` if `target` is found, else `false`.
  */
 function arrayIncludesWith(array, value, comparator) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     if (comparator(value, array[index])) {
diff --git a/_arrayMap.js b/_arrayMap.js
index 73b29cfa4..748bdbe6d 100644
--- a/_arrayMap.js
+++ b/_arrayMap.js
@@ -3,13 +3,13 @@
  * shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @param {Array} [array] The array to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @returns {Array} Returns the new mapped array.
  */
 function arrayMap(array, iteratee) {
   var index = -1,
-      length = array.length,
+      length = array ? array.length : 0,
       result = Array(length);
 
   while (++index < length) {
diff --git a/_arrayReduce.js b/_arrayReduce.js
index 41bea2cf0..57c8727ab 100644
--- a/_arrayReduce.js
+++ b/_arrayReduce.js
@@ -3,7 +3,7 @@
  * iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @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
@@ -12,7 +12,7 @@
  */
 function arrayReduce(array, iteratee, accumulator, initAccum) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   if (initAccum && length) {
     accumulator = array[++index];
diff --git a/_arrayReduceRight.js b/_arrayReduceRight.js
index 038e0fa78..4c85ee630 100644
--- a/_arrayReduceRight.js
+++ b/_arrayReduceRight.js
@@ -3,7 +3,7 @@
  * iteratee shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @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
@@ -11,7 +11,7 @@
  * @returns {*} Returns the accumulated value.
  */
 function arrayReduceRight(array, iteratee, accumulator, initAccum) {
-  var length = array.length;
+  var length = array ? array.length : 0;
   if (initAccum && length) {
     accumulator = array[--length];
   }
diff --git a/_arraySome.js b/_arraySome.js
index e6e657b8f..9b6e5d17c 100644
--- a/_arraySome.js
+++ b/_arraySome.js
@@ -3,14 +3,14 @@
  * shorthands.
  *
  * @private
- * @param {Array} array The array to iterate over.
+ * @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`.
  */
 function arraySome(array, predicate) {
   var index = -1,
-      length = array.length;
+      length = array ? array.length : 0;
 
   while (++index < length) {
     if (predicate(array[index], index, array)) {
diff --git a/_baseFindIndex.js b/_baseFindIndex.js
index 61428f6c4..bfd8259af 100644
--- a/_baseFindIndex.js
+++ b/_baseFindIndex.js
@@ -5,12 +5,13 @@
  * @private
  * @param {Array} array The array to search.
  * @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.
  * @returns {number} Returns the index of the matched value, else `-1`.
  */
-function baseFindIndex(array, predicate, fromRight) {
+function baseFindIndex(array, predicate, fromIndex, fromRight) {
   var length = array.length,
-      index = fromRight ? length : -1;
+      index = fromIndex + (fromRight ? 1 : -1);
 
   while ((fromRight ? index-- : ++index < length)) {
     if (predicate(array[index], index, array)) {
diff --git a/_baseFind.js b/_baseFindKey.js
similarity index 53%
rename from _baseFind.js
rename to _baseFindKey.js
index 338f932c4..afbad8547 100644
--- a/_baseFind.js
+++ b/_baseFindKey.js
@@ -1,25 +1,23 @@
 /**
- * The base implementation of methods like `_.find` and `_.findKey`, without
- * support for iteratee shorthands, which iterates over `collection` using
- * `eachFunc`.
+ * The base implementation of methods like `_.findKey` and `_.findLastKey`,
+ * without support for iteratee shorthands, which iterates over `collection`
+ * using `eachFunc`.
  *
  * @private
  * @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.
  * @returns {*} Returns the found element or its key, else `undefined`.
  */
-function baseFind(collection, predicate, eachFunc, retKey) {
+function baseFindKey(collection, predicate, eachFunc) {
   var result;
   eachFunc(collection, function(value, key, collection) {
     if (predicate(value, key, collection)) {
-      result = retKey ? key : value;
+      result = key;
       return false;
     }
   });
   return result;
 }
 
-module.exports = baseFind;
+module.exports = baseFindKey;
diff --git a/_baseHas.js b/_baseHas.js
index 1de5d841c..3d2e7bf74 100644
--- a/_baseHas.js
+++ b/_baseHas.js
@@ -10,7 +10,7 @@ var hasOwnProperty = objectProto.hasOwnProperty;
  * The base implementation of `_.has` without support for deep paths.
  *
  * @private
- * @param {Object} object The object to query.
+ * @param {Object} [object] The object to query.
  * @param {Array|string} key The key to check.
  * @returns {boolean} Returns `true` if `key` exists, else `false`.
  */
@@ -18,8 +18,9 @@ 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 hasOwnProperty.call(object, key) ||
-    (typeof object == 'object' && key in object && getPrototype(object) === null);
+  return object != null &&
+    (hasOwnProperty.call(object, key) ||
+      (typeof object == 'object' && key in object && getPrototype(object) === null));
 }
 
 module.exports = baseHas;
diff --git a/_baseHasIn.js b/_baseHasIn.js
index 4a3655869..2e0d04269 100644
--- a/_baseHasIn.js
+++ b/_baseHasIn.js
@@ -2,12 +2,12 @@
  * The base implementation of `_.hasIn` without support for deep paths.
  *
  * @private
- * @param {Object} object The object to query.
+ * @param {Object} [object] The object to query.
  * @param {Array|string} key The key to check.
  * @returns {boolean} Returns `true` if `key` exists, else `false`.
  */
 function baseHasIn(object, key) {
-  return key in Object(object);
+  return object != null && key in Object(object);
 }
 
 module.exports = baseHasIn;
diff --git a/_baseIsNative.js b/_baseIsNative.js
new file mode 100644
index 000000000..4d7dd0773
--- /dev/null
+++ b/_baseIsNative.js
@@ -0,0 +1,47 @@
+var isFunction = require('./isFunction'),
+    isHostObject = require('./_isHostObject'),
+    isMasked = require('./_isMasked'),
+    isObject = require('./isObject'),
+    toSource = require('./_toSource');
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = Function.prototype.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+module.exports = baseIsNative;
diff --git a/_basePullAll.js b/_basePullAll.js
index 3c07c994c..305720ede 100644
--- a/_basePullAll.js
+++ b/_basePullAll.js
@@ -1,7 +1,8 @@
 var arrayMap = require('./_arrayMap'),
     baseIndexOf = require('./_baseIndexOf'),
     baseIndexOfWith = require('./_baseIndexOfWith'),
-    baseUnary = require('./_baseUnary');
+    baseUnary = require('./_baseUnary'),
+    copyArray = require('./_copyArray');
 
 /** Used for built-in method references. */
 var arrayProto = Array.prototype;
@@ -26,6 +27,9 @@ function basePullAll(array, values, iteratee, comparator) {
       length = values.length,
       seen = array;
 
+  if (array === values) {
+    values = copyArray(values);
+  }
   if (iteratee) {
     seen = arrayMap(array, baseUnary(iteratee));
   }
diff --git a/_coreJsData.js b/_coreJsData.js
new file mode 100644
index 000000000..f8e5b4e34
--- /dev/null
+++ b/_coreJsData.js
@@ -0,0 +1,6 @@
+var root = require('./_root');
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+module.exports = coreJsData;
diff --git a/_createRound.js b/_createRound.js
index cb42ba246..74b20d408 100644
--- a/_createRound.js
+++ b/_createRound.js
@@ -2,6 +2,9 @@ var toInteger = require('./toInteger'),
     toNumber = require('./toNumber'),
     toString = require('./toString');
 
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeMin = Math.min;
+
 /**
  * Creates a function like `_.round`.
  *
@@ -13,7 +16,7 @@ function createRound(methodName) {
   var func = Math[methodName];
   return function(number, precision) {
     number = toNumber(number);
-    precision = toInteger(precision);
+    precision = nativeMin(toInteger(precision), 292);
     if (precision) {
       // Shift with exponential notation to avoid floating-point issues.
       // See [MDN](https://mdn.io/round#Examples) for more details.
diff --git a/_getMatchData.js b/_getMatchData.js
index a1456d240..2cc70f917 100644
--- a/_getMatchData.js
+++ b/_getMatchData.js
@@ -1,5 +1,5 @@
 var isStrictComparable = require('./_isStrictComparable'),
-    toPairs = require('./toPairs');
+    keys = require('./keys');
 
 /**
  * Gets the property names, values, and compare flags of `object`.
@@ -9,11 +9,14 @@ var isStrictComparable = require('./_isStrictComparable'),
  * @returns {Array} Returns the match data of `object`.
  */
 function getMatchData(object) {
-  var result = toPairs(object),
+  var result = keys(object),
       length = result.length;
 
   while (length--) {
-    result[length][2] = isStrictComparable(result[length][1]);
+    var key = result[length],
+        value = object[key];
+
+    result[length] = [key, value, isStrictComparable(value)];
   }
   return result;
 }
diff --git a/_getNative.js b/_getNative.js
index f6ff7f19b..97a622b83 100644
--- a/_getNative.js
+++ b/_getNative.js
@@ -1,4 +1,5 @@
-var isNative = require('./isNative');
+var baseIsNative = require('./_baseIsNative'),
+    getValue = require('./_getValue');
 
 /**
  * Gets the native function at `key` of `object`.
@@ -9,8 +10,8 @@ var isNative = require('./isNative');
  * @returns {*} Returns the function if it's native, else `undefined`.
  */
 function getNative(object, key) {
-  var value = object[key];
-  return isNative(value) ? value : undefined;
+  var value = getValue(object, key);
+  return baseIsNative(value) ? value : undefined;
 }
 
 module.exports = getNative;
diff --git a/_getSymbols.js b/_getSymbols.js
index 63df71742..1a7691733 100644
--- a/_getSymbols.js
+++ b/_getSymbols.js
@@ -1,3 +1,5 @@
+var stubArray = require('./stubArray');
+
 /** Built-in value references. */
 var getOwnPropertySymbols = Object.getOwnPropertySymbols;
 
@@ -16,9 +18,7 @@ function getSymbols(object) {
 
 // Fallback for IE < 11.
 if (!getOwnPropertySymbols) {
-  getSymbols = function() {
-    return [];
-  };
+  getSymbols = stubArray;
 }
 
 module.exports = getSymbols;
diff --git a/_getValue.js b/_getValue.js
new file mode 100644
index 000000000..5f7d77367
--- /dev/null
+++ b/_getValue.js
@@ -0,0 +1,13 @@
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+  return object == null ? undefined : object[key];
+}
+
+module.exports = getValue;
diff --git a/_indexOfNaN.js b/_indexOfNaN.js
index 05b8207d7..49a42bb82 100644
--- a/_indexOfNaN.js
+++ b/_indexOfNaN.js
@@ -9,7 +9,7 @@
  */
 function indexOfNaN(array, fromIndex, fromRight) {
   var length = array.length,
-      index = fromIndex + (fromRight ? 0 : -1);
+      index = fromIndex + (fromRight ? 1 : -1);
 
   while ((fromRight ? index-- : ++index < length)) {
     var other = array[index];
diff --git a/_isMaskable.js b/_isMaskable.js
new file mode 100644
index 000000000..e2e664e10
--- /dev/null
+++ b/_isMaskable.js
@@ -0,0 +1,14 @@
+var coreJsData = require('./_coreJsData'),
+    isFunction = require('./isFunction'),
+    stubFalse = require('./stubFalse');
+
+/**
+ * Checks if `func` is capable of being masked.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
+ */
+var isMaskable = !coreJsData ? stubFalse : isFunction;
+
+module.exports = isMaskable;
diff --git a/_isMasked.js b/_isMasked.js
new file mode 100644
index 000000000..4b0f21ba8
--- /dev/null
+++ b/_isMasked.js
@@ -0,0 +1,20 @@
+var coreJsData = require('./_coreJsData');
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+module.exports = isMasked;
diff --git a/_root.js b/_root.js
index d2cfd3114..c46a71af9 100644
--- a/_root.js
+++ b/_root.js
@@ -1,41 +1,15 @@
 var checkGlobal = require('./_checkGlobal');
 
-/** Used to determine if values are of the language type `Object`. */
-var objectTypes = {
-  'function': true,
-  'object': true
-};
-
-/** Detect free variable `exports`. */
-var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType)
-  ? exports
-  : undefined;
-
-/** Detect free variable `module`. */
-var freeModule = (objectTypes[typeof module] && module && !module.nodeType)
-  ? module
-  : undefined;
-
 /** Detect free variable `global` from Node.js. */
-var freeGlobal = checkGlobal(freeExports && freeModule && typeof global == 'object' && global);
+var freeGlobal = checkGlobal(typeof global == 'object' && global);
 
 /** Detect free variable `self`. */
-var freeSelf = checkGlobal(objectTypes[typeof self] && self);
-
-/** Detect free variable `window`. */
-var freeWindow = checkGlobal(objectTypes[typeof window] && window);
+var freeSelf = checkGlobal(typeof self == 'object' && self);
 
 /** Detect `this` as the global object. */
-var thisGlobal = checkGlobal(objectTypes[typeof this] && this);
+var thisGlobal = checkGlobal(typeof this == 'object' && this);
 
-/**
- * Used as a reference to the global object.
- *
- * The `this` value is used if it's the global object to avoid Greasemonkey's
- * restricted `window` object, otherwise the `window` object is used.
- */
-var root = freeGlobal ||
-  ((freeWindow !== (thisGlobal && thisGlobal.window)) && freeWindow) ||
-    freeSelf || thisGlobal || Function('return this')();
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || thisGlobal || Function('return this')();
 
 module.exports = root;
diff --git a/_stringToPath.js b/_stringToPath.js
index b6a1fc28a..8b884b92a 100644
--- a/_stringToPath.js
+++ b/_stringToPath.js
@@ -2,7 +2,7 @@ var memoize = require('./memoize'),
     toString = require('./toString');
 
 /** Used to match property names within property paths. */
-var rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]/g;
+var rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
 
 /** Used to match backslashes in property paths. */
 var reEscapeChar = /\\(\\)?/g;
diff --git a/at.js b/at.js
index 43499a874..3f2ec0c00 100644
--- a/at.js
+++ b/at.js
@@ -18,9 +18,6 @@ var baseAt = require('./_baseAt'),
  *
  * _.at(object, ['a[0].b.c', 'a[1]']);
  * // => [3, 4]
- *
- * _.at(['a', 'b', 'c'], 0, 2);
- * // => ['a', 'c']
  */
 var at = rest(function(object, paths) {
   return baseAt(object, baseFlatten(paths, 1));
diff --git a/bind.js b/bind.js
index bea3c35e7..893932a1d 100644
--- a/bind.js
+++ b/bind.js
@@ -14,7 +14,7 @@ var BIND_FLAG = 1,
  * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
  * may be used as a placeholder for partially applied arguments.
  *
- * **Note:** Unlike native `Function#bind` this method doesn't set the "length"
+ * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
  * property of bound functions.
  *
  * @static
diff --git a/bindAll.js b/bindAll.js
index d389fd70f..7d1e9bac4 100644
--- a/bindAll.js
+++ b/bindAll.js
@@ -26,7 +26,7 @@ var arrayEach = require('./_arrayEach'),
  *   }
  * };
  *
- * _.bindAll(view, 'onClick');
+ * _.bindAll(view, ['onClick']);
  * jQuery(element).on('click', view.onClick);
  * // => Logs 'clicked docs' when clicked.
  */
diff --git a/conforms.js b/conforms.js
index 7e3a93460..2a3915436 100644
--- a/conforms.js
+++ b/conforms.js
@@ -19,7 +19,7 @@ var baseClone = require('./_baseClone'),
  *   { 'user': 'fred',   'age': 40 }
  * ];
  *
- * _.filter(users, _.conforms({ 'age': _.partial(_.gt, _, 38) }));
+ * _.filter(users, _.conforms({ 'age': function(n) { return n > 38; } }));
  * // => [{ 'user': 'fred', 'age': 40 }]
  */
 function conforms(source) {
diff --git a/constant.js b/constant.js
index 63e53f6c6..655ece3fb 100644
--- a/constant.js
+++ b/constant.js
@@ -9,10 +9,12 @@
  * @returns {Function} Returns the new constant function.
  * @example
  *
- * var object = { 'user': 'fred' };
- * var getter = _.constant(object);
+ * var objects = _.times(2, _.constant({ 'a': 1 }));
  *
- * getter() === object;
+ * console.log(objects);
+ * // => [{ 'a': 1 }, { 'a': 1 }]
+ *
+ * console.log(objects[0] === objects[1]);
  * // => true
  */
 function constant(value) {
diff --git a/core.js b/core.js
index 954cdcf20..b2f6900f5 100644
--- a/core.js
+++ b/core.js
@@ -1,6 +1,7 @@
 /**
  * @license
- * lodash <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
+ * Build: `lodash core -o ./dist/lodash.core.js`
  * Copyright jQuery Foundation and other contributors <https://jquery.org/>
  * Released under MIT license <https://lodash.com/license>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
@@ -12,7 +13,7 @@
   var undefined;
 
   /** Used as the semantic version number. */
-  var VERSION = '4.12.0';
+  var VERSION = '4.13.0';
 
   /** Used as the `TypeError` message for "Functions" methods. */
   var FUNC_ERROR_TEXT = 'Expected a function';
@@ -46,9 +47,6 @@
   var reUnescapedHtml = /[&<>"'`]/g,
       reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
 
-  /** Used to detect unsigned integer values. */
-  var reIsUint = /^(?:0|[1-9]\d*)$/;
-
   /** Used to map characters to HTML entities. */
   var htmlEscapes = {
     '&': '&amp;',
@@ -59,48 +57,23 @@
     '`': '&#96;'
   };
 
-  /** Used to determine if values are of the language type `Object`. */
-  var objectTypes = {
-    'function': true,
-    'object': true
-  };
-
   /** Detect free variable `exports`. */
-  var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType)
-    ? exports
-    : undefined;
+  var freeExports = typeof exports == 'object' && exports;
 
   /** Detect free variable `module`. */
-  var freeModule = (objectTypes[typeof module] && module && !module.nodeType)
-    ? module
-    : undefined;
-
-  /** Detect the popular CommonJS extension `module.exports`. */
-  var moduleExports = (freeModule && freeModule.exports === freeExports)
-    ? freeExports
-    : undefined;
+  var freeModule = freeExports && typeof module == 'object' && module;
 
   /** Detect free variable `global` from Node.js. */
-  var freeGlobal = checkGlobal(freeExports && freeModule && typeof global == 'object' && global);
+  var freeGlobal = checkGlobal(typeof global == 'object' && global);
 
   /** Detect free variable `self`. */
-  var freeSelf = checkGlobal(objectTypes[typeof self] && self);
-
-  /** Detect free variable `window`. */
-  var freeWindow = checkGlobal(objectTypes[typeof window] && window);
+  var freeSelf = checkGlobal(typeof self == 'object' && self);
 
   /** Detect `this` as the global object. */
-  var thisGlobal = checkGlobal(objectTypes[typeof this] && this);
+  var thisGlobal = checkGlobal(typeof this == 'object' && this);
 
-  /**
-   * Used as a reference to the global object.
-   *
-   * The `this` value is used if it's the global object to avoid Greasemonkey's
-   * restricted `window` object, otherwise the `window` object is used.
-   */
-  var root = freeGlobal ||
-    ((freeWindow !== (thisGlobal && thisGlobal.window)) && freeWindow) ||
-      freeSelf || thisGlobal || Function('return this')();
+  /** Used as a reference to the global object. */
+  var root = freeGlobal || freeSelf || thisGlobal || Function('return this')();
 
   /*--------------------------------------------------------------------------*/
 
@@ -118,27 +91,26 @@
   }
 
   /**
-   * The base implementation of methods like `_.find` and `_.findKey`, without
-   * support for iteratee shorthands, which iterates over `collection` using
-   * `eachFunc`.
+   * The base implementation of `_.findIndex` and `_.findLastIndex` without
+   * support for iteratee shorthands.
    *
    * @private
-   * @param {Array|Object} collection The collection to search.
+   * @param {Array} array The array 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.
-   * @returns {*} Returns the found element or its key, else `undefined`.
+   * @param {number} fromIndex The index to search from.
+   * @param {boolean} [fromRight] Specify iterating from right to left.
+   * @returns {number} Returns the index of the matched value, else `-1`.
    */
-  function baseFind(collection, predicate, eachFunc, retKey) {
-    var result;
-    eachFunc(collection, function(value, key, collection) {
-      if (predicate(value, key, collection)) {
-        result = retKey ? key : value;
-        return false;
+  function baseFindIndex(array, predicate, fromIndex, fromRight) {
+    var length = array.length,
+        index = fromIndex + (fromRight ? 1 : -1);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (predicate(array[index], index, array)) {
+        return index;
       }
-    });
-    return result;
+    }
+    return -1;
   }
 
   /**
@@ -163,25 +135,6 @@
     return accumulator;
   }
 
-  /**
-   * The base implementation of `_.times` without support for iteratee shorthands
-   * or max array length checks.
-   *
-   * @private
-   * @param {number} n The number of times to invoke `iteratee`.
-   * @param {Function} iteratee The function invoked per iteration.
-   * @returns {Array} Returns the array of results.
-   */
-  function baseTimes(n, iteratee) {
-    var index = -1,
-        result = Array(n);
-
-    while (++index < n) {
-      result[index] = iteratee(index);
-    }
-    return result;
-  }
-
   /**
    * The base implementation of `_.values` and `_.valuesIn` which creates an
    * array of `object` property values corresponding to the property names
@@ -227,33 +180,8 @@
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
    */
-  function isHostObject(value) {
-    // Many host objects are `Object` objects that can coerce to strings
-    // despite having improperly defined `toString` methods.
-    var result = false;
-    if (value != null && typeof value.toString != 'function') {
-      try {
-        result = !!(value + '');
-      } catch (e) {}
-    }
-    return result;
-  }
-
-  /**
-   * Converts `iterator` to an array.
-   *
-   * @private
-   * @param {Object} iterator The iterator to convert.
-   * @returns {Array} Returns the converted array.
-   */
-  function iteratorToArray(iterator) {
-    var data,
-        result = [];
-
-    while (!(data = iterator.next()).done) {
-      result.push(data.value);
-    }
-    return result;
+  function isHostObject() {
+    return false;
   }
 
   /*--------------------------------------------------------------------------*/
@@ -279,11 +207,7 @@
   var oldDash = root._;
 
   /** Built-in value references. */
-  var Reflect = root.Reflect,
-      Symbol = root.Symbol,
-      Uint8Array = root.Uint8Array,
-      enumerate = Reflect ? Reflect.enumerate : undefined,
-      objectCreate = Object.create,
+  var objectCreate = Object.create,
       propertyIsEnumerable = objectProto.propertyIsEnumerable;
 
   /* Built-in method references for those with the same name as other `lodash` methods. */
@@ -368,19 +292,21 @@
    * `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`, `isBoolean`,
    * `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`, `isEqualWith`,
    * `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`, `isMap`,
-   * `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`, `isNumber`,
-   * `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`, `isSafeInteger`,
-   * `isSet`, `isString`, `isUndefined`, `isTypedArray`, `isWeakMap`, `isWeakSet`,
-   * `join`, `kebabCase`, `last`, `lastIndexOf`, `lowerCase`, `lowerFirst`,
-   * `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`, `min`, `minBy`, `multiply`,
-   * `noConflict`, `noop`, `now`, `nth`, `pad`, `padEnd`, `padStart`, `parseInt`,
-   * `pop`, `random`, `reduce`, `reduceRight`, `repeat`, `result`, `round`,
-   * `runInContext`, `sample`, `shift`, `size`, `snakeCase`, `some`, `sortedIndex`,
-   * `sortedIndexBy`, `sortedLastIndex`, `sortedLastIndexBy`, `startCase`,
-   * `startsWith`, `subtract`, `sum`, `sumBy`, `template`, `times`, `toFinite`,
-   * `toInteger`, `toJSON`, `toLength`, `toLower`, `toNumber`, `toSafeInteger`,
-   * `toString`, `toUpper`, `trim`, `trimEnd`, `trimStart`, `truncate`, `unescape`,
-   * `uniqueId`, `upperCase`, `upperFirst`, `value`, and `words`
+   * `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
+   * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
+   * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
+   * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
+   * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
+   * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
+   * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
+   * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
+   * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
+   * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
+   * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
+   * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
+   * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
+   * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
+   * `upperFirst`, `value`, and `words`
    *
    * @name _
    * @constructor
@@ -726,7 +652,7 @@
     }
     stack.push([object, other]);
     if (isSameTag && !objIsObj) {
-      var result = (objIsArr || isTypedArray(object))
+      var result = (objIsArr)
         ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
         : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
       stack.pop();
@@ -800,13 +726,6 @@
     return result;
   }
 
-  // Fallback for IE < 9 with es6-shim.
-  if (enumerate && !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf')) {
-    baseKeysIn = function(object) {
-      return iteratorToArray(enumerate(object));
-    };
-  }
-
   /**
    * The base implementation of `_.lt` which doesn't coerce arguments to numbers.
    *
@@ -1369,23 +1288,6 @@
    */
   var getLength = baseProperty('length');
 
-  /**
-   * 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;
-  }
-
   /**
    * Checks if `value` is a flattenable `arguments` object or array.
    *
@@ -1397,35 +1299,6 @@
     return isArray(value) || isArguments(value);
   }
 
-  /**
-   * Checks if `value` is a valid array-like index.
-   *
-   * @private
-   * @param {*} value The value to check.
-   * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
-   * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
-   */
-  function isIndex(value, length) {
-    length = length == null ? MAX_SAFE_INTEGER : length;
-    return !!length &&
-      (typeof value == 'number' || reIsUint.test(value)) &&
-      (value > -1 && value % 1 == 0 && value < length);
-  }
-
-  /**
-   * Checks if `value` is likely a prototype object.
-   *
-   * @private
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
-   */
-  function isPrototype(value) {
-    var Ctor = value && value.constructor,
-        proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
-
-    return value === proto;
-  }
-
   /**
    * Converts `value` to a string key if it's not a string or symbol.
    *
@@ -1492,6 +1365,54 @@
       : [];
   }
 
+  /**
+   * This method is like `_.find` except that it returns the index of the first
+   * element `predicate` returns truthy for instead of the element itself.
+   *
+   * @static
+   * @memberOf _
+   * @since 1.1.0
+   * @category Array
+   * @param {Array} array The array to search.
+   * @param {Array|Function|Object|string} [predicate=_.identity]
+   *  The function invoked per iteration.
+   * @param {number} [fromIndex=0] The index to search from.
+   * @returns {number} Returns the index of the found element, else `-1`.
+   * @example
+   *
+   * var users = [
+   *   { 'user': 'barney',  'active': false },
+   *   { 'user': 'fred',    'active': false },
+   *   { 'user': 'pebbles', 'active': true }
+   * ];
+   *
+   * _.findIndex(users, function(o) { return o.user == 'barney'; });
+   * // => 0
+   *
+   * // The `_.matches` iteratee shorthand.
+   * _.findIndex(users, { 'user': 'fred', 'active': false });
+   * // => 1
+   *
+   * // The `_.matchesProperty` iteratee shorthand.
+   * _.findIndex(users, ['active', false]);
+   * // => 0
+   *
+   * // The `_.property` iteratee shorthand.
+   * _.findIndex(users, 'active');
+   * // => 2
+   */
+  function findIndex(array, predicate, fromIndex) {
+    var length = array ? array.length : 0;
+    if (!length) {
+      return -1;
+    }
+    var index = fromIndex == null ? 0 : toInteger(fromIndex);
+    if (index < 0) {
+      index = nativeMax(length + index, 0);
+    }
+    return baseFindIndex(array, baseIteratee(predicate, 3), index);
+  }
+
   /**
    * Flattens `array` a single level deep.
    *
@@ -1873,6 +1794,7 @@
    * @param {Array|Object} collection The collection to search.
    * @param {Array|Function|Object|string} [predicate=_.identity]
    *  The function invoked per iteration.
+   * @param {number} [fromIndex=0] The index to search from.
    * @returns {*} Returns the matched element, else `undefined`.
    * @example
    *
@@ -1897,8 +1819,10 @@
    * _.find(users, 'active');
    * // => object for 'barney'
    */
-  function find(collection, predicate) {
-    return baseFind(collection, baseIteratee(predicate), baseEach);
+  function find(collection, predicate, fromIndex) {
+    collection = isArrayLike(collection) ? collection : values(collection);
+    var index = findIndex(collection, predicate, fromIndex);
+    return index > -1 ? collection[index] : undefined;
   }
 
   /**
@@ -2182,7 +2106,7 @@
    * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
    * may be used as a placeholder for partially applied arguments.
    *
-   * **Note:** Unlike native `Function#bind` this method doesn't set the "length"
+   * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
    * property of bound functions.
    *
    * @static
@@ -2993,7 +2917,7 @@
   /**
    * Converts `value` to an integer.
    *
-   * **Note:** This function is loosely based on
+   * **Note:** This method is loosely based on
    * [`ToInteger`](http://www.ecma-international.org/ecma-262/6.0/#sec-tointeger).
    *
    * @static
@@ -3301,25 +3225,7 @@
    * _.keys('hi');
    * // => ['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 (hasOwnProperty.call(object, key) &&
-          !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
-          !(isProto && key == 'constructor')) {
-        result.push(key);
-      }
-    }
-    return result;
-  }
+  var keys = baseKeys;
 
   /**
    * Creates an array of the own and inherited enumerable property names of `object`.
@@ -3344,25 +3250,7 @@
    * _.keysIn(new Foo);
    * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
    */
-  function keysIn(object) {
-    var index = -1,
-        isProto = isPrototype(object),
-        props = baseKeysIn(object),
-        propsLength = props.length,
-        indexes = indexKeys(object),
-        skipIndexes = !!indexes,
-        result = indexes || [],
-        length = result.length;
-
-    while (++index < propsLength) {
-      var key = props[index];
-      if (!(skipIndexes && (key == 'length' || isIndex(key, length))) &&
-          !(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
-        result.push(key);
-      }
-    }
-    return result;
-  }
+  var keysIn = baseKeysIn;
 
   /**
    * Creates an object composed of the picked `object` properties.
@@ -3510,7 +3398,7 @@
    *
    * var object = { 'user': 'fred' };
    *
-   * _.identity(object) === object;
+   * console.log(_.identity(object) === object);
    * // => true
    */
   function identity(value) {
@@ -3682,8 +3570,7 @@
   }
 
   /**
-   * A no-operation function that returns `undefined` regardless of the
-   * arguments it receives.
+   * A method that returns `undefined`.
    *
    * @static
    * @memberOf _
@@ -3691,10 +3578,8 @@
    * @category Util
    * @example
    *
-   * var object = { 'user': 'fred' };
-   *
-   * _.noop(object) === undefined;
-   * // => true
+   * _.times(2, _.noop);
+   * // => [undefined, undefined]
    */
   function noop() {
     // No operation performed.
@@ -3900,7 +3785,7 @@
   // also prevents errors in cases where Lodash is loaded by a script tag in the
   // presence of an AMD loader. See http://requirejs.org/docs/errors.html#mismatch
   // for more details. Use `_.noConflict` to remove Lodash from the global object.
-  (freeWindow || freeSelf || {})._ = lodash;
+  (freeSelf || {})._ = lodash;
 
   // Some AMD build optimizers like r.js check for condition patterns like the following:
   if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
@@ -3911,11 +3796,9 @@
     });
   }
   // Check for `exports` after `define` in case a build optimizer adds an `exports` object.
-  else if (freeExports && freeModule) {
+  else if (freeModule) {
     // Export for Node.js.
-    if (moduleExports) {
-      (freeModule.exports = lodash)._ = lodash;
-    }
+    (freeModule.exports = lodash)._ = lodash;
     // Export for CommonJS support.
     freeExports._ = lodash;
   }
diff --git a/core.min.js b/core.min.js
index d33dffd07..f8e40b6d3 100644
--- a/core.min.js
+++ b/core.min.js
@@ -1,28 +1,28 @@
 /**
  * @license
- * lodash lodash.com/license | Underscore.js 1.8.3 underscorejs.org/LICENSE
+ * lodash (Custom Build) /license | Underscore.js 1.8.3 underscorejs.org/LICENSE
+ * Build: `lodash core -o ./dist/lodash.core.js`
  */
-;(function(){function n(n,t){return n.push.apply(n,t),n}function t(n,t,r){var e;return r(n,function(n,r,u){return t(n,r,u)?(e=n,false):void 0}),e}function r(n,t,r,e,u){return u(n,function(n,u,o){r=e?(e=false,n):t(r,n,u,o)}),r}function e(n,t){return O(t,function(t){return n[t]})}function u(n){return n&&n.Object===Object?n:null}function o(n){return gn[n]}function i(n){var t=false;if(null!=n&&typeof n.toString!="function")try{t=!!(n+"")}catch(r){}return t}function c(n){return n instanceof f?n:new f(n)}function f(n,t){
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+return n=Bn(n),function(){return 0<--n&&(r=t.apply(this,arguments)),1>=n&&(t=en),r}}function V(n){var t;if(typeof n!="function")throw new TypeError("Expected a function");return t=xn(t===en?n.length-1:Bn(t),0),function(){for(var r=arguments,e=-1,u=xn(r.length-t,0),o=Array(u);++e<u;)o[e]=r[t+e];for(u=Array(t+1),e=-1;++e<t;)u[e]=r[e];return u[t]=o,n.apply(this,u)}}function H(n){return W(n)&&K(n)&&yn.call(n,"callee")&&(!dn.call(n,"callee")||"[object Arguments]"==gn.call(n))}function K(n){var t;return(t=null!=n)&&(t=wn(n),
+t=typeof t=="number"&&t>-1&&0==t%1&&9007199254740991>=t),t&&!L(n)}function L(n){return n=Q(n)?gn.call(n):"","[object Function]"==n||"[object GeneratorFunction]"==n}function Q(n){var t=typeof n;return!!n&&("object"==t||"function"==t)}function W(n){return!!n&&typeof n=="object"}function X(n){return typeof n=="number"||W(n)&&"[object Number]"==gn.call(n)}function Y(n){return typeof n=="string"||!Tn(n)&&W(n)&&"[object String]"==gn.call(n)}function Z(n){return typeof n=="string"?n:null==n?"":n+""}function nn(n){
+return n?u(n,t(n)):[]}function tn(n){return n}function rn(n,e,u){var o=t(e),i=g(e,o);null!=u||Q(e)&&(i.length||!o.length)||(u=e,e=n,n=this,i=g(e,t(e)));var c=!(Q(u)&&"chain"in u&&!u.chain),f=L(n);return En(i,function(t){var u=e[t];n[t]=u,f&&(n.prototype[t]=function(){var t=this.__chain__;if(c||t){var e=n(this.__wrapped__);return(e.__actions__=N(this.__actions__)).push({func:u,args:arguments,thisArg:n}),e.__chain__=t,e}return u.apply(n,r([this.value()],arguments))})}),n}var en,un=1/0,on=/[&<>"'`]/g,cn=RegExp(on.source),fn={
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+var En=function(n,t){return function(r,e){if(null==r)return r;if(!K(r))return n(r,e);for(var u=r.length,o=t?u:-1,i=Object(r);(t?o--:++o<u)&&false!==e(i[o],o,i););return r}}(b),An=function(n){return function(t,r,e){var u=-1,o=Object(t);e=e(t);for(var i=e.length;i--;){var c=e[n?i:++u];if(false===r(o[c],c,o))break}return t}}(),wn=w("length"),kn=String,Nn=V(function(n,t,r){return D(n,t,r)}),Sn=V(function(n,t){return p(n,1,t)}),Fn=V(function(n,t,r){return p(n,Rn(t)||0,r)}),Tn=Array.isArray,Bn=Number,Rn=Number,Dn=B(function(n,r){
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+return t?Dn(r,t):r},c.defaults=$n,c.defer=Sn,c.delay=Fn,c.filter=function(n,t){return v(n,m(t))},c.flatten=function(n){return n&&n.length?y(n,1):[]},c.flattenDeep=function(n){return n&&n.length?y(n,un):[]},c.iteratee=m,c.keys=t,c.map=function(n,t){return x(n,m(t))},c.matches=function(n){return E(Dn({},n))},c.mixin=rn,c.negate=function(n){if(typeof n!="function")throw new TypeError("Expected a function");return function(){return!n.apply(this,arguments)}},c.once=function(n){return U(2,n)},c.pick=zn,
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+c.thru=function(n,t){return t(n)},c.toArray=function(n){return K(n)?n.length?N(n):[]:nn(n)},c.values=nn,c.extend=In,rn(c,c),c.clone=function(n){return Q(n)?Tn(n)?N(n):T(n,t(n)):n},c.escape=function(n){return(n=Z(n))&&cn.test(n)?n.replace(on,i):n},c.every=function(n,t,r){return t=r?en:t,s(n,m(t))},c.find=J,c.forEach=M,c.has=function(n,t){return null!=n&&yn.call(n,t)},c.head=C,c.identity=tn,c.indexOf=G,c.isArguments=H,c.isArray=Tn,c.isBoolean=function(n){return true===n||false===n||W(n)&&"[object Boolean]"==gn.call(n);
+},c.isDate=function(n){return W(n)&&"[object Date]"==gn.call(n)},c.isEmpty=function(n){return K(n)&&(Tn(n)||Y(n)||L(n.splice)||H(n))?!n.length:!t(n).length},c.isEqual=function(n,t){return j(n,t)},c.isFinite=function(n){return typeof n=="number"&&mn(n)},c.isFunction=L,c.isNaN=function(n){return X(n)&&n!=+n},c.isNull=function(n){return null===n},c.isNumber=X,c.isObject=Q,c.isRegExp=function(n){return Q(n)&&"[object RegExp]"==gn.call(n)},c.isString=Y,c.isUndefined=function(n){return n===en},c.last=function(n){
+var t=n?n.length:0;return t?n[t-1]:en},c.max=function(n){return n&&n.length?h(n,tn,_):en},c.min=function(n){return n&&n.length?h(n,tn,O):en},c.noConflict=function(){return sn._===this&&(sn._=_n),this},c.noop=function(){},c.reduce=P,c.result=function(n,t,r){return t=null==n?en:n[t],t===en&&(t=r),L(t)?t.call(n):t},c.size=function(n){return null==n?0:(n=K(n)?n:t(n),n.length)},c.some=function(n,t,r){return t=r?en:t,S(n,m(t))},c.uniqueId=function(n){var t=++bn;return Z(n)+t},c.each=M,c.first=C,rn(c,function(){
+var n={};return b(c,function(t,r){yn.call(c.prototype,r)||(n[r]=t)}),n}(),{chain:false}),c.VERSION="4.13.0",En("pop join replace reverse split push shift sort splice unshift".split(" "),function(n){var t=(/^(?:replace|split)$/.test(n)?String.prototype:hn)[n],r=/^(?:push|sort|unshift)$/.test(n)?"tap":"thru",e=/^(?:pop|join|replace|shift)$/.test(n);c.prototype[n]=function(){var n=arguments;if(e&&!this.__chain__){var u=this.value();return t.apply(Tn(u)?u:[],n)}return this[r](function(r){return t.apply(Tn(r)?r:[],n);
+})}}),c.prototype.toJSON=c.prototype.valueOf=c.prototype.value=function(){return F(this.__wrapped__,this.__actions__)},(pn||{})._=c,typeof define=="function"&&typeof define.amd=="object"&&define.amd? define(function(){return c}):ln?((ln.exports=c)._=c,an._=c):sn._=c}).call(this);
\ No newline at end of file
diff --git a/countBy.js b/countBy.js
index d8b0a516b..9162b9f1c 100644
--- a/countBy.js
+++ b/countBy.js
@@ -25,6 +25,7 @@ var hasOwnProperty = objectProto.hasOwnProperty;
  * _.countBy([6.1, 4.2, 6.3], Math.floor);
  * // => { '4': 1, '6': 2 }
  *
+ * // The `_.property` iteratee shorthand.
  * _.countBy(['one', 'two', 'three'], 'length');
  * // => { '3': 2, '5': 1 }
  */
diff --git a/debounce.js b/debounce.js
index 0fcd6e67e..a36c8ac06 100644
--- a/debounce.js
+++ b/debounce.js
@@ -65,7 +65,7 @@ function debounce(func, wait, options) {
       maxWait,
       result,
       timerId,
-      lastCallTime = 0,
+      lastCallTime,
       lastInvokeTime = 0,
       leading = false,
       maxing = false,
@@ -116,7 +116,7 @@ function debounce(func, wait, options) {
     // Either this is the first call, activity has stopped and we're at the
     // trailing edge, the system time has gone backwards and we're treating
     // it as the trailing edge, or we've hit the `maxWait` limit.
-    return (!lastCallTime || (timeSinceLastCall >= wait) ||
+    return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
       (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
   }
 
@@ -130,7 +130,6 @@ function debounce(func, wait, options) {
   }
 
   function trailingEdge(time) {
-    clearTimeout(timerId);
     timerId = undefined;
 
     // Only invoke if we have `lastArgs` which means `func` has been
@@ -143,11 +142,8 @@ function debounce(func, wait, options) {
   }
 
   function cancel() {
-    if (timerId !== undefined) {
-      clearTimeout(timerId);
-    }
-    lastCallTime = lastInvokeTime = 0;
-    lastArgs = lastThis = timerId = undefined;
+    lastInvokeTime = 0;
+    lastArgs = lastCallTime = lastThis = timerId = undefined;
   }
 
   function flush() {
@@ -168,7 +164,6 @@ function debounce(func, wait, options) {
       }
       if (maxing) {
         // Handle invocations in a tight loop.
-        clearTimeout(timerId);
         timerId = setTimeout(timerExpired, wait);
         return invokeFunc(lastCallTime);
       }
diff --git a/difference.js b/difference.js
index 65fdb1a7d..bd52f54ea 100644
--- a/difference.js
+++ b/difference.js
@@ -19,8 +19,8 @@ var baseDifference = require('./_baseDifference'),
  * @see _.without, _.xor
  * @example
  *
- * _.difference([3, 2, 1], [4, 2]);
- * // => [3, 1]
+ * _.difference([2, 1], [2, 3]);
+ * // => [1]
  */
 var difference = rest(function(array, values) {
   return isArrayLikeObject(array)
diff --git a/differenceBy.js b/differenceBy.js
index 7ec2ae8a2..bbafa3272 100644
--- a/differenceBy.js
+++ b/differenceBy.js
@@ -22,8 +22,8 @@ var baseDifference = require('./_baseDifference'),
  * @returns {Array} Returns the new array of filtered values.
  * @example
  *
- * _.differenceBy([3.1, 2.2, 1.3], [4.4, 2.5], Math.floor);
- * // => [3.1, 1.3]
+ * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+ * // => [1.2]
  *
  * // The `_.property` iteratee shorthand.
  * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
diff --git a/endsWith.js b/endsWith.js
index f143f6e84..bf10f2562 100644
--- a/endsWith.js
+++ b/endsWith.js
@@ -12,7 +12,7 @@ var baseClamp = require('./_baseClamp'),
  * @category String
  * @param {string} [string=''] The string to search.
  * @param {string} [target] The string to search for.
- * @param {number} [position=string.length] The position to search from.
+ * @param {number} [position=string.length] The position to search up to.
  * @returns {boolean} Returns `true` if `string` ends with `target`,
  *  else `false`.
  * @example
diff --git a/find.js b/find.js
index 83f0dbad0..4af928a10 100644
--- a/find.js
+++ b/find.js
@@ -1,8 +1,6 @@
-var baseEach = require('./_baseEach'),
-    baseFind = require('./_baseFind'),
-    baseFindIndex = require('./_baseFindIndex'),
-    baseIteratee = require('./_baseIteratee'),
-    isArray = require('./isArray');
+var findIndex = require('./findIndex'),
+    isArrayLike = require('./isArrayLike'),
+    values = require('./values');
 
 /**
  * Iterates over elements of `collection`, returning the first element
@@ -16,6 +14,7 @@ var baseEach = require('./_baseEach'),
  * @param {Array|Object} collection The collection to search.
  * @param {Array|Function|Object|string} [predicate=_.identity]
  *  The function invoked per iteration.
+ * @param {number} [fromIndex=0] The index to search from.
  * @returns {*} Returns the matched element, else `undefined`.
  * @example
  *
@@ -40,13 +39,10 @@ var baseEach = require('./_baseEach'),
  * _.find(users, 'active');
  * // => object for 'barney'
  */
-function find(collection, predicate) {
-  predicate = baseIteratee(predicate, 3);
-  if (isArray(collection)) {
-    var index = baseFindIndex(collection, predicate);
-    return index > -1 ? collection[index] : undefined;
-  }
-  return baseFind(collection, predicate, baseEach);
+function find(collection, predicate, fromIndex) {
+  collection = isArrayLike(collection) ? collection : values(collection);
+  var index = findIndex(collection, predicate, fromIndex);
+  return index > -1 ? collection[index] : undefined;
 }
 
 module.exports = find;
diff --git a/findIndex.js b/findIndex.js
index 84acc7464..83af981f5 100644
--- a/findIndex.js
+++ b/findIndex.js
@@ -1,5 +1,9 @@
 var baseFindIndex = require('./_baseFindIndex'),
-    baseIteratee = require('./_baseIteratee');
+    baseIteratee = require('./_baseIteratee'),
+    toInteger = require('./toInteger');
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeMax = Math.max;
 
 /**
  * This method is like `_.find` except that it returns the index of the first
@@ -12,6 +16,7 @@ var baseFindIndex = require('./_baseFindIndex'),
  * @param {Array} array The array to search.
  * @param {Array|Function|Object|string} [predicate=_.identity]
  *  The function invoked per iteration.
+ * @param {number} [fromIndex=0] The index to search from.
  * @returns {number} Returns the index of the found element, else `-1`.
  * @example
  *
@@ -36,10 +41,16 @@ var baseFindIndex = require('./_baseFindIndex'),
  * _.findIndex(users, 'active');
  * // => 2
  */
-function findIndex(array, predicate) {
-  return (array && array.length)
-    ? baseFindIndex(array, baseIteratee(predicate, 3))
-    : -1;
+function findIndex(array, predicate, fromIndex) {
+  var length = array ? array.length : 0;
+  if (!length) {
+    return -1;
+  }
+  var index = fromIndex == null ? 0 : toInteger(fromIndex);
+  if (index < 0) {
+    index = nativeMax(length + index, 0);
+  }
+  return baseFindIndex(array, baseIteratee(predicate, 3), index);
 }
 
 module.exports = findIndex;
diff --git a/findKey.js b/findKey.js
index 16a9fd9ae..26fc234e2 100644
--- a/findKey.js
+++ b/findKey.js
@@ -1,4 +1,4 @@
-var baseFind = require('./_baseFind'),
+var baseFindKey = require('./_baseFindKey'),
     baseForOwn = require('./_baseForOwn'),
     baseIteratee = require('./_baseIteratee');
 
@@ -39,7 +39,7 @@ var baseFind = require('./_baseFind'),
  * // => 'barney'
  */
 function findKey(object, predicate) {
-  return baseFind(object, baseIteratee(predicate, 3), baseForOwn, true);
+  return baseFindKey(object, baseIteratee(predicate, 3), baseForOwn);
 }
 
 module.exports = findKey;
diff --git a/findLast.js b/findLast.js
index d222a5588..4dde2de61 100644
--- a/findLast.js
+++ b/findLast.js
@@ -1,8 +1,6 @@
-var baseEachRight = require('./_baseEachRight'),
-    baseFind = require('./_baseFind'),
-    baseFindIndex = require('./_baseFindIndex'),
-    baseIteratee = require('./_baseIteratee'),
-    isArray = require('./isArray');
+var findLastIndex = require('./findLastIndex'),
+    isArrayLike = require('./isArrayLike'),
+    values = require('./values');
 
 /**
  * This method is like `_.find` except that it iterates over elements of
@@ -15,6 +13,7 @@ var baseEachRight = require('./_baseEachRight'),
  * @param {Array|Object} collection The collection to search.
  * @param {Array|Function|Object|string} [predicate=_.identity]
  *  The function invoked per iteration.
+ * @param {number} [fromIndex=collection.length-1] The index to search from.
  * @returns {*} Returns the matched element, else `undefined`.
  * @example
  *
@@ -23,13 +22,10 @@ var baseEachRight = require('./_baseEachRight'),
  * });
  * // => 3
  */
-function findLast(collection, predicate) {
-  predicate = baseIteratee(predicate, 3);
-  if (isArray(collection)) {
-    var index = baseFindIndex(collection, predicate, true);
-    return index > -1 ? collection[index] : undefined;
-  }
-  return baseFind(collection, predicate, baseEachRight);
+function findLast(collection, predicate, fromIndex) {
+  collection = isArrayLike(collection) ? collection : values(collection);
+  var index = findLastIndex(collection, predicate, fromIndex);
+  return index > -1 ? collection[index] : undefined;
 }
 
 module.exports = findLast;
diff --git a/findLastIndex.js b/findLastIndex.js
index bf397d8ff..2caf34aec 100644
--- a/findLastIndex.js
+++ b/findLastIndex.js
@@ -1,5 +1,10 @@
 var baseFindIndex = require('./_baseFindIndex'),
-    baseIteratee = require('./_baseIteratee');
+    baseIteratee = require('./_baseIteratee'),
+    toInteger = require('./toInteger');
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeMax = Math.max,
+    nativeMin = Math.min;
 
 /**
  * This method is like `_.findIndex` except that it iterates over elements
@@ -12,6 +17,7 @@ var baseFindIndex = require('./_baseFindIndex'),
  * @param {Array} array The array to search.
  * @param {Array|Function|Object|string} [predicate=_.identity]
  *  The function invoked per iteration.
+ * @param {number} [fromIndex=array.length-1] The index to search from.
  * @returns {number} Returns the index of the found element, else `-1`.
  * @example
  *
@@ -36,10 +42,19 @@ var baseFindIndex = require('./_baseFindIndex'),
  * _.findLastIndex(users, 'active');
  * // => 0
  */
-function findLastIndex(array, predicate) {
-  return (array && array.length)
-    ? baseFindIndex(array, baseIteratee(predicate, 3), true)
-    : -1;
+function findLastIndex(array, predicate, fromIndex) {
+  var length = array ? array.length : 0;
+  if (!length) {
+    return -1;
+  }
+  var index = length - 1;
+  if (fromIndex !== undefined) {
+    index = toInteger(fromIndex);
+    index = fromIndex < 0
+      ? nativeMax(length + index, 0)
+      : nativeMin(index, length - 1);
+  }
+  return baseFindIndex(array, baseIteratee(predicate, 3), index, true);
 }
 
 module.exports = findLastIndex;
diff --git a/findLastKey.js b/findLastKey.js
index fb915df46..5eedc1d29 100644
--- a/findLastKey.js
+++ b/findLastKey.js
@@ -1,4 +1,4 @@
-var baseFind = require('./_baseFind'),
+var baseFindKey = require('./_baseFindKey'),
     baseForOwnRight = require('./_baseForOwnRight'),
     baseIteratee = require('./_baseIteratee');
 
@@ -39,7 +39,7 @@ var baseFind = require('./_baseFind'),
  * // => 'pebbles'
  */
 function findLastKey(object, predicate) {
-  return baseFind(object, baseIteratee(predicate, 3), baseForOwnRight, true);
+  return baseFindKey(object, baseIteratee(predicate, 3), baseForOwnRight);
 }
 
 module.exports = findLastKey;
diff --git a/flow.js b/flow.js
index b87ad4dfa..462f2dbdc 100644
--- a/flow.js
+++ b/flow.js
@@ -18,7 +18,7 @@ var createFlow = require('./_createFlow');
  *   return n * n;
  * }
  *
- * var addSquare = _.flow(_.add, square);
+ * var addSquare = _.flow([_.add, square]);
  * addSquare(1, 2);
  * // => 9
  */
diff --git a/flowRight.js b/flowRight.js
index 6ae18a1da..a4eb8b616 100644
--- a/flowRight.js
+++ b/flowRight.js
@@ -17,7 +17,7 @@ var createFlow = require('./_createFlow');
  *   return n * n;
  * }
  *
- * var addSquare = _.flowRight(square, _.add);
+ * var addSquare = _.flowRight([square, _.add]);
  * addSquare(1, 2);
  * // => 9
  */
diff --git a/fp/_mapping.js b/fp/_mapping.js
index 178e4d6d4..a30c5dee4 100644
--- a/fp/_mapping.js
+++ b/fp/_mapping.js
@@ -84,12 +84,13 @@ exports.aryMethod = {
   ],
   '3': [
     'assignInWith', 'assignWith', 'clamp', 'differenceBy', 'differenceWith',
-    'getOr', 'inRange', 'intersectionBy', 'intersectionWith', 'invokeArgs',
-    'invokeArgsMap', 'isEqualWith', 'isMatchWith', 'flatMapDepth', 'mergeWith',
-    'orderBy', 'padChars', 'padCharsEnd', 'padCharsStart', 'pullAllBy',
-    'pullAllWith', 'reduce', 'reduceRight', 'replace', 'set', 'slice',
-    'sortedIndexBy', 'sortedLastIndexBy', 'transform', 'unionBy', 'unionWith',
-    'update', 'xorBy', 'xorWith', 'zipWith'
+    'findFrom', 'findIndexFrom', 'findLastFrom', 'findLastIndexFrom', 'getOr',
+    'includesFrom', 'indexOfFrom', 'inRange', 'intersectionBy', 'intersectionWith',
+    'invokeArgs', 'invokeArgsMap', 'isEqualWith', 'isMatchWith', 'flatMapDepth',
+    'lastIndexOfFrom', 'mergeWith', 'orderBy', 'padChars', 'padCharsEnd',
+    'padCharsStart', 'pullAllBy', 'pullAllWith', 'reduce', 'reduceRight', 'replace',
+    'set', 'slice', 'sortedIndexBy', 'sortedLastIndexBy', 'transform', 'unionBy',
+    'unionWith', 'update', 'xorBy', 'xorWith', 'zipWith'
   ],
   '4': [
     'fill', 'setWith', 'updateWith'
@@ -110,10 +111,14 @@ exports.iterateeAry = {
   'every': 1,
   'filter': 1,
   'find': 1,
+  'findFrom': 1,
   'findIndex': 1,
+  'findIndexFrom': 1,
   'findKey': 1,
   'findLast': 1,
+  'findLastFrom': 1,
   'findLastIndex': 1,
+  'findLastIndexFrom': 1,
   'findLastKey': 1,
   'flatMap': 1,
   'flatMapDeep': 1,
@@ -148,7 +153,11 @@ exports.iterateeRearg = {
 exports.methodRearg = {
   'assignInWith': [1, 2, 0],
   'assignWith': [1, 2, 0],
+  'differenceBy': [1, 2, 0],
+  'differenceWith': [1, 2, 0],
   'getOr': [2, 1, 0],
+  'intersectionBy': [1, 2, 0],
+  'intersectionWith': [1, 2, 0],
   'isEqualWith': [1, 2, 0],
   'isMatchWith': [2, 1, 0],
   'mergeWith': [1, 2, 0],
@@ -160,7 +169,11 @@ exports.methodRearg = {
   'setWith': [3, 1, 2, 0],
   'sortedIndexBy': [2, 1, 0],
   'sortedLastIndexBy': [2, 1, 0],
+  'unionBy': [1, 2, 0],
+  'unionWith': [1, 2, 0],
   'updateWith': [3, 1, 2, 0],
+  'xorBy': [1, 2, 0],
+  'xorWith': [1, 2, 0],
   'zipWith': [1, 2, 0]
 };
 
@@ -235,9 +248,16 @@ exports.realToAlias = (function() {
 exports.remap = {
   'curryN': 'curry',
   'curryRightN': 'curryRight',
+  'findFrom': 'find',
+  'findIndexFrom': 'findIndex',
+  'findLastFrom': 'findLast',
+  'findLastIndexFrom': 'findLastIndex',
   'getOr': 'get',
+  'includesFrom': 'includes',
+  'indexOfFrom': 'indexOf',
   'invokeArgs': 'invoke',
   'invokeArgsMap': 'invokeMap',
+  'lastIndexOfFrom': 'lastIndexOf',
   'padChars': 'pad',
   'padCharsEnd': 'padEnd',
   'padCharsStart': 'padStart',
@@ -284,7 +304,6 @@ exports.skipRearg = {
   'range': true,
   'rangeRight': true,
   'subtract': true,
-  'without': true,
   'zip': true,
   'zipObject': true
 };
diff --git a/fp/findFrom.js b/fp/findFrom.js
new file mode 100644
index 000000000..da8275e84
--- /dev/null
+++ b/fp/findFrom.js
@@ -0,0 +1,5 @@
+var convert = require('./convert'),
+    func = convert('findFrom', require('../find'));
+
+func.placeholder = require('./placeholder');
+module.exports = func;
diff --git a/fp/findIndexFrom.js b/fp/findIndexFrom.js
new file mode 100644
index 000000000..32e98cb95
--- /dev/null
+++ b/fp/findIndexFrom.js
@@ -0,0 +1,5 @@
+var convert = require('./convert'),
+    func = convert('findIndexFrom', require('../findIndex'));
+
+func.placeholder = require('./placeholder');
+module.exports = func;
diff --git a/fp/findLastFrom.js b/fp/findLastFrom.js
new file mode 100644
index 000000000..76c38fbad
--- /dev/null
+++ b/fp/findLastFrom.js
@@ -0,0 +1,5 @@
+var convert = require('./convert'),
+    func = convert('findLastFrom', require('../findLast'));
+
+func.placeholder = require('./placeholder');
+module.exports = func;
diff --git a/fp/findLastIndexFrom.js b/fp/findLastIndexFrom.js
new file mode 100644
index 000000000..34c8176cf
--- /dev/null
+++ b/fp/findLastIndexFrom.js
@@ -0,0 +1,5 @@
+var convert = require('./convert'),
+    func = convert('findLastIndexFrom', require('../findLastIndex'));
+
+func.placeholder = require('./placeholder');
+module.exports = func;
diff --git a/fp/includesFrom.js b/fp/includesFrom.js
new file mode 100644
index 000000000..683afdb46
--- /dev/null
+++ b/fp/includesFrom.js
@@ -0,0 +1,5 @@
+var convert = require('./convert'),
+    func = convert('includesFrom', require('../includes'));
+
+func.placeholder = require('./placeholder');
+module.exports = func;
diff --git a/fp/indexOfFrom.js b/fp/indexOfFrom.js
new file mode 100644
index 000000000..d99c822f4
--- /dev/null
+++ b/fp/indexOfFrom.js
@@ -0,0 +1,5 @@
+var convert = require('./convert'),
+    func = convert('indexOfFrom', require('../indexOf'));
+
+func.placeholder = require('./placeholder');
+module.exports = func;
diff --git a/fp/lastIndexOfFrom.js b/fp/lastIndexOfFrom.js
new file mode 100644
index 000000000..1ff6a0b5a
--- /dev/null
+++ b/fp/lastIndexOfFrom.js
@@ -0,0 +1,5 @@
+var convert = require('./convert'),
+    func = convert('lastIndexOfFrom', require('../lastIndexOf'));
+
+func.placeholder = require('./placeholder');
+module.exports = func;
diff --git a/fp/stubArray.js b/fp/stubArray.js
new file mode 100644
index 000000000..cd604cb49
--- /dev/null
+++ b/fp/stubArray.js
@@ -0,0 +1,5 @@
+var convert = require('./convert'),
+    func = convert('stubArray', require('../stubArray'), require('./_falseOptions'));
+
+func.placeholder = require('./placeholder');
+module.exports = func;
diff --git a/fp/stubFalse.js b/fp/stubFalse.js
new file mode 100644
index 000000000..329666454
--- /dev/null
+++ b/fp/stubFalse.js
@@ -0,0 +1,5 @@
+var convert = require('./convert'),
+    func = convert('stubFalse', require('../stubFalse'), require('./_falseOptions'));
+
+func.placeholder = require('./placeholder');
+module.exports = func;
diff --git a/fp/stubObject.js b/fp/stubObject.js
new file mode 100644
index 000000000..c6c8ec472
--- /dev/null
+++ b/fp/stubObject.js
@@ -0,0 +1,5 @@
+var convert = require('./convert'),
+    func = convert('stubObject', require('../stubObject'), require('./_falseOptions'));
+
+func.placeholder = require('./placeholder');
+module.exports = func;
diff --git a/fp/stubString.js b/fp/stubString.js
new file mode 100644
index 000000000..701051e8b
--- /dev/null
+++ b/fp/stubString.js
@@ -0,0 +1,5 @@
+var convert = require('./convert'),
+    func = convert('stubString', require('../stubString'), require('./_falseOptions'));
+
+func.placeholder = require('./placeholder');
+module.exports = func;
diff --git a/fp/stubTrue.js b/fp/stubTrue.js
new file mode 100644
index 000000000..9249082ce
--- /dev/null
+++ b/fp/stubTrue.js
@@ -0,0 +1,5 @@
+var convert = require('./convert'),
+    func = convert('stubTrue', require('../stubTrue'), require('./_falseOptions'));
+
+func.placeholder = require('./placeholder');
+module.exports = func;
diff --git a/identity.js b/identity.js
index 3732edb13..058296ffc 100644
--- a/identity.js
+++ b/identity.js
@@ -11,7 +11,7 @@
  *
  * var object = { 'user': 'fred' };
  *
- * _.identity(object) === object;
+ * console.log(_.identity(object) === object);
  * // => true
  */
 function identity(value) {
diff --git a/indexOf.js b/indexOf.js
index 65616d454..657e4b5eb 100644
--- a/indexOf.js
+++ b/indexOf.js
@@ -32,11 +32,11 @@ function indexOf(array, value, fromIndex) {
   if (!length) {
     return -1;
   }
-  fromIndex = toInteger(fromIndex);
-  if (fromIndex < 0) {
-    fromIndex = nativeMax(length + fromIndex, 0);
+  var index = fromIndex == null ? 0 : toInteger(fromIndex);
+  if (index < 0) {
+    index = nativeMax(length + index, 0);
   }
-  return baseIndexOf(array, value, fromIndex);
+  return baseIndexOf(array, value, index);
 }
 
 module.exports = indexOf;
diff --git a/intersection.js b/intersection.js
index 1a7c7706c..1da06f8f5 100644
--- a/intersection.js
+++ b/intersection.js
@@ -17,7 +17,7 @@ var arrayMap = require('./_arrayMap'),
  * @returns {Array} Returns the new array of intersecting values.
  * @example
  *
- * _.intersection([2, 1], [4, 2], [1, 2]);
+ * _.intersection([2, 1], [2, 3]);
  * // => [2]
  */
 var intersection = rest(function(arrays) {
diff --git a/intersectionBy.js b/intersectionBy.js
index 6afb79db6..5b8ffdcc2 100644
--- a/intersectionBy.js
+++ b/intersectionBy.js
@@ -21,7 +21,7 @@ var arrayMap = require('./_arrayMap'),
  * @returns {Array} Returns the new array of intersecting values.
  * @example
  *
- * _.intersectionBy([2.1, 1.2], [4.3, 2.4], Math.floor);
+ * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
  * // => [2.1]
  *
  * // The `_.property` iteratee shorthand.
diff --git a/isBuffer.js b/isBuffer.js
index 404c22200..566c09f77 100644
--- a/isBuffer.js
+++ b/isBuffer.js
@@ -1,26 +1,14 @@
-var constant = require('./constant'),
-    root = require('./_root');
-
-/** Used to determine if values are of the language type `Object`. */
-var objectTypes = {
-  'function': true,
-  'object': true
-};
+var root = require('./_root'),
+    stubFalse = require('./stubFalse');
 
 /** Detect free variable `exports`. */
-var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType)
-  ? exports
-  : undefined;
+var freeExports = typeof exports == 'object' && exports;
 
 /** Detect free variable `module`. */
-var freeModule = (objectTypes[typeof module] && module && !module.nodeType)
-  ? module
-  : undefined;
+var freeModule = freeExports && typeof module == 'object' && module;
 
 /** Detect the popular CommonJS extension `module.exports`. */
-var moduleExports = (freeModule && freeModule.exports === freeExports)
-  ? freeExports
-  : undefined;
+var moduleExports = freeModule && freeModule.exports === freeExports;
 
 /** Built-in value references. */
 var Buffer = moduleExports ? root.Buffer : undefined;
@@ -42,7 +30,7 @@ var Buffer = moduleExports ? root.Buffer : undefined;
  * _.isBuffer(new Uint8Array(2));
  * // => false
  */
-var isBuffer = !Buffer ? constant(false) : function(value) {
+var isBuffer = !Buffer ? stubFalse : function(value) {
   return value instanceof Buffer;
 };
 
diff --git a/isNative.js b/isNative.js
index 2d5149ba4..8d9dd0588 100644
--- a/isNative.js
+++ b/isNative.js
@@ -1,34 +1,16 @@
-var isFunction = require('./isFunction'),
-    isHostObject = require('./_isHostObject'),
-    isObject = require('./isObject'),
-    toSource = require('./_toSource');
+var baseIsNative = require('./_baseIsNative'),
+    isMaskable = require('./_isMaskable');
 
 /**
- * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
- */
-var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
-
-/** Used to detect host constructors (Safari). */
-var reIsHostCtor = /^\[object .+?Constructor\]$/;
-
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
-
-/** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
-
-/** Used to check objects for own properties. */
-var hasOwnProperty = objectProto.hasOwnProperty;
-
-/** Used to detect if a method is native. */
-var reIsNative = RegExp('^' +
-  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
-  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
-);
-
-/**
- * Checks if `value` is a native function.
+ * Checks if `value` is a pristine native function.
+ *
+ * **Note:** This method can't reliably detect native functions in the
+ * presence of the `core-js` package because `core-js` circumvents this kind
+ * of detection. Despite multiple requests, the `core-js` maintainer has made
+ * it clear: any attempt to fix the detection will be obstructed. As a result,
+ * we're left with little choice but to throw an error. Unfortunately, this
+ * also affects packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
+ * which rely on `core-js`.
  *
  * @static
  * @memberOf _
@@ -46,11 +28,10 @@ var reIsNative = RegExp('^' +
  * // => false
  */
 function isNative(value) {
-  if (!isObject(value)) {
-    return false;
+  if (isMaskable(value)) {
+    throw new Error('This method is not supported with `core-js`. Try https://github.com/es-shims.');
   }
-  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
-  return pattern.test(toSource(value));
+  return baseIsNative(value);
 }
 
 module.exports = isNative;
diff --git a/lastIndexOf.js b/lastIndexOf.js
index 7e9d988e5..1b8fbbc0e 100644
--- a/lastIndexOf.js
+++ b/lastIndexOf.js
@@ -41,7 +41,7 @@ function lastIndexOf(array, value, fromIndex) {
     ) + 1;
   }
   if (value !== value) {
-    return indexOfNaN(array, index, true);
+    return indexOfNaN(array, index - 1, true);
   }
   while (index--) {
     if (array[index] === value) {
diff --git a/lodash.js b/lodash.js
index 4bcb6ca88..3fef2c8e8 100644
--- a/lodash.js
+++ b/lodash.js
@@ -12,7 +12,7 @@
   var undefined;
 
   /** Used as the semantic version number. */
-  var VERSION = '4.12.0';
+  var VERSION = '4.13.0';
 
   /** Used as the size to enable large array optimizations. */
   var LARGE_ARRAY_SIZE = 200;
@@ -116,7 +116,7 @@
   /** Used to match property names within property paths. */
   var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
       reIsPlainProp = /^\w*$/,
-      rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]/g;
+      rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g;
 
   /**
    * Used to match `RegExp`
@@ -249,7 +249,7 @@
     'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',
     'Promise', 'Reflect', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError',
     'Uint8Array', 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',
-    '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'
+    '_', 'isFinite', 'parseInt', 'setTimeout'
   ];
 
   /** Used to make template sourceURLs easier to identify. */
@@ -328,12 +328,6 @@
     '&#96;': '`'
   };
 
-  /** Used to determine if values are of the language type `Object`. */
-  var objectTypes = {
-    'function': true,
-    'object': true
-  };
-
   /** Used to escape characters for inclusion in compiled string literals. */
   var stringEscapes = {
     '\\': '\\',
@@ -349,41 +343,25 @@
       freeParseInt = parseInt;
 
   /** Detect free variable `exports`. */
-  var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType)
-    ? exports
-    : undefined;
+  var freeExports = typeof exports == 'object' && exports;
 
   /** Detect free variable `module`. */
-  var freeModule = (objectTypes[typeof module] && module && !module.nodeType)
-    ? module
-    : undefined;
+  var freeModule = freeExports && typeof module == 'object' && module;
 
   /** Detect the popular CommonJS extension `module.exports`. */
-  var moduleExports = (freeModule && freeModule.exports === freeExports)
-    ? freeExports
-    : undefined;
+  var moduleExports = freeModule && freeModule.exports === freeExports;
 
   /** Detect free variable `global` from Node.js. */
-  var freeGlobal = checkGlobal(freeExports && freeModule && typeof global == 'object' && global);
+  var freeGlobal = checkGlobal(typeof global == 'object' && global);
 
   /** Detect free variable `self`. */
-  var freeSelf = checkGlobal(objectTypes[typeof self] && self);
-
-  /** Detect free variable `window`. */
-  var freeWindow = checkGlobal(objectTypes[typeof window] && window);
+  var freeSelf = checkGlobal(typeof self == 'object' && self);
 
   /** Detect `this` as the global object. */
-  var thisGlobal = checkGlobal(objectTypes[typeof this] && this);
+  var thisGlobal = checkGlobal(typeof this == 'object' && this);
 
-  /**
-   * Used as a reference to the global object.
-   *
-   * The `this` value is used if it's the global object to avoid Greasemonkey's
-   * restricted `window` object, otherwise the `window` object is used.
-   */
-  var root = freeGlobal ||
-    ((freeWindow !== (thisGlobal && thisGlobal.window)) && freeWindow) ||
-      freeSelf || thisGlobal || Function('return this')();
+  /** Used as a reference to the global object. */
+  var root = freeGlobal || freeSelf || thisGlobal || Function('return this')();
 
   /*--------------------------------------------------------------------------*/
 
@@ -439,7 +417,7 @@
    * A specialized version of `baseAggregator` for arrays.
    *
    * @private
-   * @param {Array} array The array to iterate over.
+   * @param {Array} [array] The array to iterate over.
    * @param {Function} setter The function to set `accumulator` values.
    * @param {Function} iteratee The iteratee to transform keys.
    * @param {Object} accumulator The initial aggregated object.
@@ -447,7 +425,7 @@
    */
   function arrayAggregator(array, setter, iteratee, accumulator) {
     var index = -1,
-        length = array.length;
+        length = array ? array.length : 0;
 
     while (++index < length) {
       var value = array[index];
@@ -461,13 +439,13 @@
    * iteratee shorthands.
    *
    * @private
-   * @param {Array} array The array to iterate over.
+   * @param {Array} [array] The array to iterate over.
    * @param {Function} iteratee The function invoked per iteration.
    * @returns {Array} Returns `array`.
    */
   function arrayEach(array, iteratee) {
     var index = -1,
-        length = array.length;
+        length = array ? array.length : 0;
 
     while (++index < length) {
       if (iteratee(array[index], index, array) === false) {
@@ -482,12 +460,12 @@
    * iteratee shorthands.
    *
    * @private
-   * @param {Array} array The array to iterate over.
+   * @param {Array} [array] The array to iterate over.
    * @param {Function} iteratee The function invoked per iteration.
    * @returns {Array} Returns `array`.
    */
   function arrayEachRight(array, iteratee) {
-    var length = array.length;
+    var length = array ? array.length : 0;
 
     while (length--) {
       if (iteratee(array[length], length, array) === false) {
@@ -502,14 +480,14 @@
    * iteratee shorthands.
    *
    * @private
-   * @param {Array} array The array to iterate over.
+   * @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`.
    */
   function arrayEvery(array, predicate) {
     var index = -1,
-        length = array.length;
+        length = array ? array.length : 0;
 
     while (++index < length) {
       if (!predicate(array[index], index, array)) {
@@ -524,13 +502,13 @@
    * iteratee shorthands.
    *
    * @private
-   * @param {Array} array The array to iterate over.
+   * @param {Array} [array] The array to iterate over.
    * @param {Function} predicate The function invoked per iteration.
    * @returns {Array} Returns the new filtered array.
    */
   function arrayFilter(array, predicate) {
     var index = -1,
-        length = array.length,
+        length = array ? array.length : 0,
         resIndex = 0,
         result = [];
 
@@ -548,26 +526,27 @@
    * specifying an index to search from.
    *
    * @private
-   * @param {Array} array The array to search.
+   * @param {Array} [array] The array to search.
    * @param {*} target The value to search for.
    * @returns {boolean} Returns `true` if `target` is found, else `false`.
    */
   function arrayIncludes(array, value) {
-    return !!array.length && baseIndexOf(array, value, 0) > -1;
+    var length = array ? array.length : 0;
+    return !!length && baseIndexOf(array, value, 0) > -1;
   }
 
   /**
    * 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 search.
    * @param {*} target The value to search for.
    * @param {Function} comparator The comparator invoked per element.
    * @returns {boolean} Returns `true` if `target` is found, else `false`.
    */
   function arrayIncludesWith(array, value, comparator) {
     var index = -1,
-        length = array.length;
+        length = array ? array.length : 0;
 
     while (++index < length) {
       if (comparator(value, array[index])) {
@@ -582,13 +561,13 @@
    * shorthands.
    *
    * @private
-   * @param {Array} array The array to iterate over.
+   * @param {Array} [array] The array to iterate over.
    * @param {Function} iteratee The function invoked per iteration.
    * @returns {Array} Returns the new mapped array.
    */
   function arrayMap(array, iteratee) {
     var index = -1,
-        length = array.length,
+        length = array ? array.length : 0,
         result = Array(length);
 
     while (++index < length) {
@@ -621,7 +600,7 @@
    * iteratee shorthands.
    *
    * @private
-   * @param {Array} array The array to iterate over.
+   * @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
@@ -630,7 +609,7 @@
    */
   function arrayReduce(array, iteratee, accumulator, initAccum) {
     var index = -1,
-        length = array.length;
+        length = array ? array.length : 0;
 
     if (initAccum && length) {
       accumulator = array[++index];
@@ -646,7 +625,7 @@
    * iteratee shorthands.
    *
    * @private
-   * @param {Array} array The array to iterate over.
+   * @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
@@ -654,7 +633,7 @@
    * @returns {*} Returns the accumulated value.
    */
   function arrayReduceRight(array, iteratee, accumulator, initAccum) {
-    var length = array.length;
+    var length = array ? array.length : 0;
     if (initAccum && length) {
       accumulator = array[--length];
     }
@@ -669,14 +648,14 @@
    * shorthands.
    *
    * @private
-   * @param {Array} array The array to iterate over.
+   * @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`.
    */
   function arraySome(array, predicate) {
     var index = -1,
-        length = array.length;
+        length = array ? array.length : 0;
 
     while (++index < length) {
       if (predicate(array[index], index, array)) {
@@ -687,23 +666,21 @@
   }
 
   /**
-   * The base implementation of methods like `_.find` and `_.findKey`, without
-   * support for iteratee shorthands, which iterates over `collection` using
-   * `eachFunc`.
+   * The base implementation of methods like `_.findKey` and `_.findLastKey`,
+   * without support for iteratee shorthands, which iterates over `collection`
+   * using `eachFunc`.
    *
    * @private
    * @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.
    * @returns {*} Returns the found element or its key, else `undefined`.
    */
-  function baseFind(collection, predicate, eachFunc, retKey) {
+  function baseFindKey(collection, predicate, eachFunc) {
     var result;
     eachFunc(collection, function(value, key, collection) {
       if (predicate(value, key, collection)) {
-        result = retKey ? key : value;
+        result = key;
         return false;
       }
     });
@@ -717,12 +694,13 @@
    * @private
    * @param {Array} array The array to search.
    * @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.
    * @returns {number} Returns the index of the matched value, else `-1`.
    */
-  function baseFindIndex(array, predicate, fromRight) {
+  function baseFindIndex(array, predicate, fromIndex, fromRight) {
     var length = array.length,
-        index = fromRight ? length : -1;
+        index = fromIndex + (fromRight ? 1 : -1);
 
     while ((fromRight ? index-- : ++index < length)) {
       if (predicate(array[index], index, array)) {
@@ -1029,6 +1007,18 @@
     return '\\' + stringEscapes[chr];
   }
 
+  /**
+   * Gets the value at `key` of `object`.
+   *
+   * @private
+   * @param {Object} [object] The object to query.
+   * @param {string} key The key of the property to get.
+   * @returns {*} Returns the property value.
+   */
+  function getValue(object, key) {
+    return object == null ? undefined : object[key];
+  }
+
   /**
    * Gets the index at which the first occurrence of `NaN` is found in `array`.
    *
@@ -1040,7 +1030,7 @@
    */
   function indexOfNaN(array, fromIndex, fromRight) {
     var length = array.length,
-        index = fromIndex + (fromRight ? 0 : -1);
+        index = fromIndex + (fromRight ? 1 : -1);
 
     while ((fromRight ? index-- : ++index < length)) {
       var other = array[index];
@@ -1231,10 +1221,10 @@
    * lodash.isFunction(lodash.bar);
    * // => true
    *
-   * // Use `context` to mock `Date#getTime` use in `_.now`.
-   * var mock = _.runInContext({
+   * // Use `context` to stub `Date#getTime` use in `_.now`.
+   * var stubbed = _.runInContext({
    *   'Date': function() {
-   *     return { 'getTime': getTimeMock };
+   *     return { 'getTime': stubGetTime };
    *   }
    * });
    *
@@ -1256,6 +1246,15 @@
         objectProto = context.Object.prototype,
         stringProto = context.String.prototype;
 
+    /** Used to detect overreaching core-js shims. */
+    var coreJsData = context['__core-js_shared__'];
+
+    /** Used to detect methods masquerading as native. */
+    var maskSrcKey = (function() {
+      var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+      return uid ? ('Symbol(src)_1.' + uid) : '';
+    }());
+
     /** Used to resolve the decompiled source of functions. */
     var funcToString = context.Function.prototype.toString;
 
@@ -1289,15 +1288,16 @@
         Reflect = context.Reflect,
         Symbol = context.Symbol,
         Uint8Array = context.Uint8Array,
-        clearTimeout = context.clearTimeout,
         enumerate = Reflect ? Reflect.enumerate : undefined,
         getOwnPropertySymbols = Object.getOwnPropertySymbols,
         iteratorSymbol = typeof (iteratorSymbol = Symbol && Symbol.iterator) == 'symbol' ? iteratorSymbol : undefined,
         objectCreate = Object.create,
         propertyIsEnumerable = objectProto.propertyIsEnumerable,
-        setTimeout = context.setTimeout,
         splice = arrayProto.splice;
 
+    /** Built-in method references that are mockable. */
+    var setTimeout = function(func, wait) { return context.setTimeout.call(root, func, wait); };
+
     /* Built-in method references for those with the same name as other `lodash` methods. */
     var nativeCeil = Math.ceil,
         nativeFloor = Math.floor,
@@ -1419,19 +1419,21 @@
      * `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`, `isBoolean`,
      * `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`, `isEqualWith`,
      * `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`, `isMap`,
-     * `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`, `isNumber`,
-     * `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`, `isSafeInteger`,
-     * `isSet`, `isString`, `isUndefined`, `isTypedArray`, `isWeakMap`, `isWeakSet`,
-     * `join`, `kebabCase`, `last`, `lastIndexOf`, `lowerCase`, `lowerFirst`,
-     * `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`, `min`, `minBy`, `multiply`,
-     * `noConflict`, `noop`, `now`, `nth`, `pad`, `padEnd`, `padStart`, `parseInt`,
-     * `pop`, `random`, `reduce`, `reduceRight`, `repeat`, `result`, `round`,
-     * `runInContext`, `sample`, `shift`, `size`, `snakeCase`, `some`, `sortedIndex`,
-     * `sortedIndexBy`, `sortedLastIndex`, `sortedLastIndexBy`, `startCase`,
-     * `startsWith`, `subtract`, `sum`, `sumBy`, `template`, `times`, `toFinite`,
-     * `toInteger`, `toJSON`, `toLength`, `toLower`, `toNumber`, `toSafeInteger`,
-     * `toString`, `toUpper`, `trim`, `trimEnd`, `trimStart`, `truncate`, `unescape`,
-     * `uniqueId`, `upperCase`, `upperFirst`, `value`, and `words`
+     * `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
+     * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
+     * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
+     * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
+     * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
+     * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
+     * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
+     * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
+     * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
+     * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
+     * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
+     * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
+     * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
+     * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
+     * `upperFirst`, `value`, and `words`
      *
      * @name _
      * @constructor
@@ -2732,7 +2734,7 @@
      * The base implementation of `_.has` without support for deep paths.
      *
      * @private
-     * @param {Object} object The object to query.
+     * @param {Object} [object] The object to query.
      * @param {Array|string} key The key to check.
      * @returns {boolean} Returns `true` if `key` exists, else `false`.
      */
@@ -2740,20 +2742,21 @@
       // 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 hasOwnProperty.call(object, key) ||
-        (typeof object == 'object' && key in object && getPrototype(object) === null);
+      return object != null &&
+        (hasOwnProperty.call(object, key) ||
+          (typeof object == 'object' && key in object && getPrototype(object) === null));
     }
 
     /**
      * The base implementation of `_.hasIn` without support for deep paths.
      *
      * @private
-     * @param {Object} object The object to query.
+     * @param {Object} [object] The object to query.
      * @param {Array|string} key The key to check.
      * @returns {boolean} Returns `true` if `key` exists, else `false`.
      */
     function baseHasIn(object, key) {
-      return key in Object(object);
+      return object != null && key in Object(object);
     }
 
     /**
@@ -3007,6 +3010,22 @@
       return true;
     }
 
+    /**
+     * The base implementation of `_.isNative` without bad shim checks.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a native function,
+     *  else `false`.
+     */
+    function baseIsNative(value) {
+      if (!isObject(value) || isMasked(value)) {
+        return false;
+      }
+      var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+      return pattern.test(toSource(value));
+    }
+
     /**
      * The base implementation of `_.iteratee`.
      *
@@ -3375,6 +3394,9 @@
           length = values.length,
           seen = array;
 
+      if (array === values) {
+        values = copyArray(values);
+      }
       if (iteratee) {
         seen = arrayMap(array, baseUnary(iteratee));
       }
@@ -4890,7 +4912,7 @@
       var func = Math[methodName];
       return function(number, precision) {
         number = toNumber(number);
-        precision = toInteger(precision);
+        precision = nativeMin(toInteger(precision), 292);
         if (precision) {
           // Shift with exponential notation to avoid floating-point issues.
           // See [MDN](https://mdn.io/round#Examples) for more details.
@@ -5371,11 +5393,14 @@
      * @returns {Array} Returns the match data of `object`.
      */
     function getMatchData(object) {
-      var result = toPairs(object),
+      var result = keys(object),
           length = result.length;
 
       while (length--) {
-        result[length][2] = isStrictComparable(result[length][1]);
+        var key = result[length],
+            value = object[key];
+
+        result[length] = [key, value, isStrictComparable(value)];
       }
       return result;
     }
@@ -5389,8 +5414,8 @@
      * @returns {*} Returns the function if it's native, else `undefined`.
      */
     function getNative(object, key) {
-      var value = object[key];
-      return isNative(value) ? value : undefined;
+      var value = getValue(object, key);
+      return baseIsNative(value) ? value : undefined;
     }
 
     /**
@@ -5419,9 +5444,7 @@
 
     // Fallback for IE < 11.
     if (!getOwnPropertySymbols) {
-      getSymbols = function() {
-        return [];
-      };
+      getSymbols = stubArray;
     }
 
     /**
@@ -5753,6 +5776,26 @@
       return !!data && func === data[0];
     }
 
+    /**
+     * Checks if `func` has its source masked.
+     *
+     * @private
+     * @param {Function} func The function to check.
+     * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+     */
+    function isMasked(func) {
+      return !!maskSrcKey && (maskSrcKey in func);
+    }
+
+    /**
+     * Checks if `func` is capable of being masked.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
+     */
+    var isMaskable = !coreJsData ? stubFalse : isFunction;
+
     /**
      * Checks if `value` is likely a prototype object.
      *
@@ -6149,8 +6192,8 @@
      * @see _.without, _.xor
      * @example
      *
-     * _.difference([3, 2, 1], [4, 2]);
-     * // => [3, 1]
+     * _.difference([2, 1], [2, 3]);
+     * // => [1]
      */
     var difference = rest(function(array, values) {
       return isArrayLikeObject(array)
@@ -6175,8 +6218,8 @@
      * @returns {Array} Returns the new array of filtered values.
      * @example
      *
-     * _.differenceBy([3.1, 2.2, 1.3], [4.4, 2.5], Math.floor);
-     * // => [3.1, 1.3]
+     * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+     * // => [1.2]
      *
      * // The `_.property` iteratee shorthand.
      * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
@@ -6428,6 +6471,7 @@
      * @param {Array} array The array to search.
      * @param {Array|Function|Object|string} [predicate=_.identity]
      *  The function invoked per iteration.
+     * @param {number} [fromIndex=0] The index to search from.
      * @returns {number} Returns the index of the found element, else `-1`.
      * @example
      *
@@ -6452,10 +6496,16 @@
      * _.findIndex(users, 'active');
      * // => 2
      */
-    function findIndex(array, predicate) {
-      return (array && array.length)
-        ? baseFindIndex(array, getIteratee(predicate, 3))
-        : -1;
+    function findIndex(array, predicate, fromIndex) {
+      var length = array ? array.length : 0;
+      if (!length) {
+        return -1;
+      }
+      var index = fromIndex == null ? 0 : toInteger(fromIndex);
+      if (index < 0) {
+        index = nativeMax(length + index, 0);
+      }
+      return baseFindIndex(array, getIteratee(predicate, 3), index);
     }
 
     /**
@@ -6469,6 +6519,7 @@
      * @param {Array} array The array to search.
      * @param {Array|Function|Object|string} [predicate=_.identity]
      *  The function invoked per iteration.
+     * @param {number} [fromIndex=array.length-1] The index to search from.
      * @returns {number} Returns the index of the found element, else `-1`.
      * @example
      *
@@ -6493,10 +6544,19 @@
      * _.findLastIndex(users, 'active');
      * // => 0
      */
-    function findLastIndex(array, predicate) {
-      return (array && array.length)
-        ? baseFindIndex(array, getIteratee(predicate, 3), true)
-        : -1;
+    function findLastIndex(array, predicate, fromIndex) {
+      var length = array ? array.length : 0;
+      if (!length) {
+        return -1;
+      }
+      var index = length - 1;
+      if (fromIndex !== undefined) {
+        index = toInteger(fromIndex);
+        index = fromIndex < 0
+          ? nativeMax(length + index, 0)
+          : nativeMin(index, length - 1);
+      }
+      return baseFindIndex(array, getIteratee(predicate, 3), index, true);
     }
 
     /**
@@ -6643,11 +6703,11 @@
       if (!length) {
         return -1;
       }
-      fromIndex = toInteger(fromIndex);
-      if (fromIndex < 0) {
-        fromIndex = nativeMax(length + fromIndex, 0);
+      var index = fromIndex == null ? 0 : toInteger(fromIndex);
+      if (index < 0) {
+        index = nativeMax(length + index, 0);
       }
-      return baseIndexOf(array, value, fromIndex);
+      return baseIndexOf(array, value, index);
     }
 
     /**
@@ -6682,7 +6742,7 @@
      * @returns {Array} Returns the new array of intersecting values.
      * @example
      *
-     * _.intersection([2, 1], [4, 2], [1, 2]);
+     * _.intersection([2, 1], [2, 3]);
      * // => [2]
      */
     var intersection = rest(function(arrays) {
@@ -6708,7 +6768,7 @@
      * @returns {Array} Returns the new array of intersecting values.
      * @example
      *
-     * _.intersectionBy([2.1, 1.2], [4.3, 2.4], Math.floor);
+     * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
      * // => [2.1]
      *
      * // The `_.property` iteratee shorthand.
@@ -6838,7 +6898,7 @@
         ) + 1;
       }
       if (value !== value) {
-        return indexOfNaN(array, index, true);
+        return indexOfNaN(array, index - 1, true);
       }
       while (index--) {
         if (array[index] === value) {
@@ -6849,7 +6909,7 @@
     }
 
     /**
-     * Gets the element at `n` index of `array`. If `n` is negative, the nth
+     * Gets the element at index `n` of `array`. If `n` is negative, the nth
      * element from the end is returned.
      *
      * @static
@@ -6890,11 +6950,11 @@
      * @returns {Array} Returns `array`.
      * @example
      *
-     * var array = [1, 2, 3, 1, 2, 3];
+     * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
      *
-     * _.pull(array, 2, 3);
+     * _.pull(array, 'a', 'c');
      * console.log(array);
-     * // => [1, 1]
+     * // => ['b', 'b']
      */
     var pull = rest(pullAll);
 
@@ -6912,11 +6972,11 @@
      * @returns {Array} Returns `array`.
      * @example
      *
-     * var array = [1, 2, 3, 1, 2, 3];
+     * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
      *
-     * _.pullAll(array, [2, 3]);
+     * _.pullAll(array, ['a', 'c']);
      * console.log(array);
-     * // => [1, 1]
+     * // => ['b', 'b']
      */
     function pullAll(array, values) {
       return (array && array.length && values && values.length)
@@ -6998,14 +7058,14 @@
      * @returns {Array} Returns the new array of removed elements.
      * @example
      *
-     * var array = [5, 10, 15, 20];
-     * var evens = _.pullAt(array, 1, 3);
+     * var array = ['a', 'b', 'c', 'd'];
+     * var pulled = _.pullAt(array, [1, 3]);
      *
      * console.log(array);
-     * // => [5, 15]
+     * // => ['a', 'c']
      *
-     * console.log(evens);
-     * // => [10, 20]
+     * console.log(pulled);
+     * // => ['b', 'd']
      */
     var pullAt = rest(function(array, indexes) {
       indexes = baseFlatten(indexes, 1);
@@ -7145,9 +7205,6 @@
      *
      * _.sortedIndex([30, 50], 40);
      * // => 1
-     *
-     * _.sortedIndex([4, 5], 4);
-     * // => 0
      */
     function sortedIndex(array, value) {
       return baseSortedIndex(array, value);
@@ -7170,13 +7227,13 @@
      *  into `array`.
      * @example
      *
-     * var dict = { 'thirty': 30, 'forty': 40, 'fifty': 50 };
+     * var objects = [{ 'x': 4 }, { 'x': 5 }];
      *
-     * _.sortedIndexBy(['thirty', 'fifty'], 'forty', _.propertyOf(dict));
-     * // => 1
+     * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+     * // => 0
      *
      * // The `_.property` iteratee shorthand.
-     * _.sortedIndexBy([{ 'x': 4 }, { 'x': 5 }], { 'x': 4 }, 'x');
+     * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
      * // => 0
      */
     function sortedIndexBy(array, value, iteratee) {
@@ -7196,8 +7253,8 @@
      * @returns {number} Returns the index of the matched value, else `-1`.
      * @example
      *
-     * _.sortedIndexOf([1, 1, 2, 2], 2);
-     * // => 2
+     * _.sortedIndexOf([4, 5, 5, 5, 6], 5);
+     * // => 1
      */
     function sortedIndexOf(array, value) {
       var length = array ? array.length : 0;
@@ -7225,8 +7282,8 @@
      *  into `array`.
      * @example
      *
-     * _.sortedLastIndex([4, 5], 4);
-     * // => 1
+     * _.sortedLastIndex([4, 5, 5, 5, 6], 5);
+     * // => 4
      */
     function sortedLastIndex(array, value) {
       return baseSortedIndex(array, value, true);
@@ -7249,8 +7306,13 @@
      *  into `array`.
      * @example
      *
+     * var objects = [{ 'x': 4 }, { 'x': 5 }];
+     *
+     * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+     * // => 1
+     *
      * // The `_.property` iteratee shorthand.
-     * _.sortedLastIndexBy([{ 'x': 4 }, { 'x': 5 }], { 'x': 4 }, 'x');
+     * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
      * // => 1
      */
     function sortedLastIndexBy(array, value, iteratee) {
@@ -7270,7 +7332,7 @@
      * @returns {number} Returns the index of the matched value, else `-1`.
      * @example
      *
-     * _.sortedLastIndexOf([1, 1, 2, 2], 2);
+     * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
      * // => 3
      */
     function sortedLastIndexOf(array, value) {
@@ -7510,8 +7572,8 @@
      * @returns {Array} Returns the new array of combined values.
      * @example
      *
-     * _.union([2, 1], [4, 2], [1, 2]);
-     * // => [2, 1, 4]
+     * _.union([2], [1, 2]);
+     * // => [2, 1]
      */
     var union = rest(function(arrays) {
       return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
@@ -7533,8 +7595,8 @@
      * @returns {Array} Returns the new array of combined values.
      * @example
      *
-     * _.unionBy([2.1, 1.2], [4.3, 2.4], Math.floor);
-     * // => [2.1, 1.2, 4.3]
+     * _.unionBy([2.1], [1.2, 2.3], Math.floor);
+     * // => [2.1, 1.2]
      *
      * // The `_.property` iteratee shorthand.
      * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
@@ -7641,7 +7703,7 @@
      * @returns {Array} Returns the new duplicate free array.
      * @example
      *
-     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 },  { 'x': 1, 'y': 2 }];
+     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
      *
      * _.uniqWith(objects, _.isEqual);
      * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
@@ -7736,7 +7798,7 @@
      * @see _.difference, _.xor
      * @example
      *
-     * _.without([1, 2, 1, 3], 1, 2);
+     * _.without([2, 1, 2, 3], 1, 2);
      * // => [3]
      */
     var without = rest(function(array, values) {
@@ -7760,8 +7822,8 @@
      * @see _.difference, _.without
      * @example
      *
-     * _.xor([2, 1], [4, 2]);
-     * // => [1, 4]
+     * _.xor([2, 1], [2, 3]);
+     * // => [1, 3]
      */
     var xor = rest(function(arrays) {
       return baseXor(arrayFilter(arrays, isArrayLikeObject));
@@ -7783,8 +7845,8 @@
      * @returns {Array} Returns the new array of filtered values.
      * @example
      *
-     * _.xorBy([2.1, 1.2], [4.3, 2.4], Math.floor);
-     * // => [1.2, 4.3]
+     * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+     * // => [1.2, 3.4]
      *
      * // The `_.property` iteratee shorthand.
      * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
@@ -8017,9 +8079,6 @@
      *
      * _(object).at(['a[0].b.c', 'a[1]']).value();
      * // => [3, 4]
-     *
-     * _(['a', 'b', 'c']).at(0, 2).value();
-     * // => ['a', 'c']
      */
     var wrapperAt = rest(function(paths) {
       paths = baseFlatten(paths, 1);
@@ -8282,6 +8341,7 @@
      * _.countBy([6.1, 4.2, 6.3], Math.floor);
      * // => { '4': 1, '6': 2 }
      *
+     * // The `_.property` iteratee shorthand.
      * _.countBy(['one', 'two', 'three'], 'length');
      * // => { '3': 2, '5': 1 }
      */
@@ -8387,6 +8447,7 @@
      * @param {Array|Object} collection The collection to search.
      * @param {Array|Function|Object|string} [predicate=_.identity]
      *  The function invoked per iteration.
+     * @param {number} [fromIndex=0] The index to search from.
      * @returns {*} Returns the matched element, else `undefined`.
      * @example
      *
@@ -8411,13 +8472,10 @@
      * _.find(users, 'active');
      * // => object for 'barney'
      */
-    function find(collection, predicate) {
-      predicate = getIteratee(predicate, 3);
-      if (isArray(collection)) {
-        var index = baseFindIndex(collection, predicate);
-        return index > -1 ? collection[index] : undefined;
-      }
-      return baseFind(collection, predicate, baseEach);
+    function find(collection, predicate, fromIndex) {
+      collection = isArrayLike(collection) ? collection : values(collection);
+      var index = findIndex(collection, predicate, fromIndex);
+      return index > -1 ? collection[index] : undefined;
     }
 
     /**
@@ -8431,6 +8489,7 @@
      * @param {Array|Object} collection The collection to search.
      * @param {Array|Function|Object|string} [predicate=_.identity]
      *  The function invoked per iteration.
+     * @param {number} [fromIndex=collection.length-1] The index to search from.
      * @returns {*} Returns the matched element, else `undefined`.
      * @example
      *
@@ -8439,13 +8498,10 @@
      * });
      * // => 3
      */
-    function findLast(collection, predicate) {
-      predicate = getIteratee(predicate, 3);
-      if (isArray(collection)) {
-        var index = baseFindIndex(collection, predicate, true);
-        return index > -1 ? collection[index] : undefined;
-      }
-      return baseFind(collection, predicate, baseEachRight);
+    function findLast(collection, predicate, fromIndex) {
+      collection = isArrayLike(collection) ? collection : values(collection);
+      var index = findLastIndex(collection, predicate, fromIndex);
+      return index > -1 ? collection[index] : undefined;
     }
 
     /**
@@ -9203,7 +9259,6 @@
      * @static
      * @memberOf _
      * @since 2.4.0
-     * @type {Function}
      * @category Date
      * @returns {number} Returns the timestamp.
      * @example
@@ -9211,9 +9266,11 @@
      * _.defer(function(stamp) {
      *   console.log(_.now() - stamp);
      * }, _.now());
-     * // => Logs the number of milliseconds it took for the deferred function to be invoked.
+     * // => Logs the number of milliseconds it took for the deferred invocation.
      */
-    var now = Date.now;
+    function now() {
+      return Date.now();
+    }
 
     /*------------------------------------------------------------------------*/
 
@@ -9317,7 +9374,7 @@
      * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
      * may be used as a placeholder for partially applied arguments.
      *
-     * **Note:** Unlike native `Function#bind` this method doesn't set the "length"
+     * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
      * property of bound functions.
      *
      * @static
@@ -9557,7 +9614,7 @@
           maxWait,
           result,
           timerId,
-          lastCallTime = 0,
+          lastCallTime,
           lastInvokeTime = 0,
           leading = false,
           maxing = false,
@@ -9608,7 +9665,7 @@
         // Either this is the first call, activity has stopped and we're at the
         // trailing edge, the system time has gone backwards and we're treating
         // it as the trailing edge, or we've hit the `maxWait` limit.
-        return (!lastCallTime || (timeSinceLastCall >= wait) ||
+        return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
           (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
       }
 
@@ -9622,7 +9679,6 @@
       }
 
       function trailingEdge(time) {
-        clearTimeout(timerId);
         timerId = undefined;
 
         // Only invoke if we have `lastArgs` which means `func` has been
@@ -9635,11 +9691,8 @@
       }
 
       function cancel() {
-        if (timerId !== undefined) {
-          clearTimeout(timerId);
-        }
-        lastCallTime = lastInvokeTime = 0;
-        lastArgs = lastThis = timerId = undefined;
+        lastInvokeTime = 0;
+        lastArgs = lastCallTime = lastThis = timerId = undefined;
       }
 
       function flush() {
@@ -9660,7 +9713,6 @@
           }
           if (maxing) {
             // Handle invocations in a tight loop.
-            clearTimeout(timerId);
             timerId = setTimeout(timerExpired, wait);
             return invokeFunc(lastCallTime);
           }
@@ -9884,7 +9936,7 @@
      *
      * var func = _.overArgs(function(x, y) {
      *   return [x, y];
-     * }, square, doubled);
+     * }, [square, doubled]);
      *
      * func(9, 3);
      * // => [81, 6]
@@ -10001,7 +10053,7 @@
      *
      * var rearged = _.rearg(function(a, b, c) {
      *   return [a, b, c];
-     * }, 2, 0, 1);
+     * }, [2, 0, 1]);
      *
      * rearged('b', 'c', 'a')
      * // => ['a', 'b', 'c']
@@ -10640,7 +10692,7 @@
      * _.isBuffer(new Uint8Array(2));
      * // => false
      */
-    var isBuffer = !Buffer ? constant(false) : function(value) {
+    var isBuffer = !Buffer ? stubFalse : function(value) {
       return value instanceof Buffer;
     };
 
@@ -11140,7 +11192,15 @@
     }
 
     /**
-     * Checks if `value` is a native function.
+     * Checks if `value` is a pristine native function.
+     *
+     * **Note:** This method can't reliably detect native functions in the
+     * presence of the `core-js` package because `core-js` circumvents this kind
+     * of detection. Despite multiple requests, the `core-js` maintainer has made
+     * it clear: any attempt to fix the detection will be obstructed. As a result,
+     * we're left with little choice but to throw an error. Unfortunately, this
+     * also affects packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
+     * which rely on `core-js`.
      *
      * @static
      * @memberOf _
@@ -11158,11 +11218,10 @@
      * // => false
      */
     function isNative(value) {
-      if (!isObject(value)) {
-        return false;
+      if (isMaskable(value)) {
+        throw new Error('This method is not supported with `core-js`. Try https://github.com/es-shims.');
       }
-      var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
-      return pattern.test(toSource(value));
+      return baseIsNative(value);
     }
 
     /**
@@ -11624,7 +11683,7 @@
     /**
      * Converts `value` to an integer.
      *
-     * **Note:** This function is loosely based on
+     * **Note:** This method is loosely based on
      * [`ToInteger`](http://www.ecma-international.org/ecma-262/6.0/#sec-tointeger).
      *
      * @static
@@ -11978,9 +12037,6 @@
      *
      * _.at(object, ['a[0].b.c', 'a[1]']);
      * // => [3, 4]
-     *
-     * _.at(['a', 'b', 'c'], 0, 2);
-     * // => ['a', 'c']
      */
     var at = rest(function(object, paths) {
       return baseAt(object, baseFlatten(paths, 1));
@@ -12113,7 +12169,7 @@
      * // => 'barney'
      */
     function findKey(object, predicate) {
-      return baseFind(object, getIteratee(predicate, 3), baseForOwn, true);
+      return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);
     }
 
     /**
@@ -12153,7 +12209,7 @@
      * // => 'pebbles'
      */
     function findLastKey(object, predicate) {
-      return baseFind(object, getIteratee(predicate, 3), baseForOwnRight, true);
+      return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);
     }
 
     /**
@@ -13012,15 +13068,16 @@
      * An alternative to `_.reduce`; this method transforms `object` to a new
      * `accumulator` object which is the result of running each of its own
      * enumerable string keyed properties thru `iteratee`, with each invocation
-     * potentially mutating the `accumulator` object. The iteratee is invoked
-     * with four arguments: (accumulator, value, key, object). Iteratee functions
-     * may exit iteration early by explicitly returning `false`.
+     * potentially mutating the `accumulator` object. If `accumulator` is not
+     * provided, a new object with the same `[[Prototype]]` will be used. The
+     * iteratee is invoked with four arguments: (accumulator, value, key, object).
+     * Iteratee functions may exit iteration early by explicitly returning `false`.
      *
      * @static
      * @memberOf _
      * @since 1.3.0
      * @category Object
-     * @param {Array|Object} object The object to iterate over.
+     * @param {Object} object The object to iterate over.
      * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [accumulator] The custom accumulator value.
      * @returns {*} Returns the accumulated value.
@@ -13442,7 +13499,7 @@
      * @category String
      * @param {string} [string=''] The string to search.
      * @param {string} [target] The string to search for.
-     * @param {number} [position=string.length] The position to search from.
+     * @param {number} [position=string.length] The position to search up to.
      * @returns {boolean} Returns `true` if `string` ends with `target`,
      *  else `false`.
      * @example
@@ -14527,7 +14584,7 @@
      *   }
      * };
      *
-     * _.bindAll(view, 'onClick');
+     * _.bindAll(view, ['onClick']);
      * jQuery(element).on('click', view.onClick);
      * // => Logs 'clicked docs' when clicked.
      */
@@ -14608,7 +14665,7 @@
      *   { 'user': 'fred',   'age': 40 }
      * ];
      *
-     * _.filter(users, _.conforms({ 'age': _.partial(_.gt, _, 38) }));
+     * _.filter(users, _.conforms({ 'age': function(n) { return n > 38; } }));
      * // => [{ 'user': 'fred', 'age': 40 }]
      */
     function conforms(source) {
@@ -14626,10 +14683,12 @@
      * @returns {Function} Returns the new constant function.
      * @example
      *
-     * var object = { 'user': 'fred' };
-     * var getter = _.constant(object);
+     * var objects = _.times(2, _.constant({ 'a': 1 }));
      *
-     * getter() === object;
+     * console.log(objects);
+     * // => [{ 'a': 1 }, { 'a': 1 }]
+     *
+     * console.log(objects[0] === objects[1]);
      * // => true
      */
     function constant(value) {
@@ -14656,7 +14715,7 @@
      *   return n * n;
      * }
      *
-     * var addSquare = _.flow(_.add, square);
+     * var addSquare = _.flow([_.add, square]);
      * addSquare(1, 2);
      * // => 9
      */
@@ -14679,7 +14738,7 @@
      *   return n * n;
      * }
      *
-     * var addSquare = _.flowRight(square, _.add);
+     * var addSquare = _.flowRight([square, _.add]);
      * addSquare(1, 2);
      * // => 9
      */
@@ -14698,7 +14757,7 @@
      *
      * var object = { 'user': 'fred' };
      *
-     * _.identity(object) === object;
+     * console.log(_.identity(object) === object);
      * // => true
      */
     function identity(value) {
@@ -14959,8 +15018,7 @@
     }
 
     /**
-     * A no-operation function that returns `undefined` regardless of the
-     * arguments it receives.
+     * A method that returns `undefined`.
      *
      * @static
      * @memberOf _
@@ -14968,17 +15026,15 @@
      * @category Util
      * @example
      *
-     * var object = { 'user': 'fred' };
-     *
-     * _.noop(object) === undefined;
-     * // => true
+     * _.times(2, _.noop);
+     * // => [undefined, undefined]
      */
     function noop() {
       // No operation performed.
     }
 
     /**
-     * Creates a function that gets the argument at `n` index. If `n` is negative,
+     * Creates a function that gets the argument at index `n`. If `n` is negative,
      * the nth argument from the end is returned.
      *
      * @static
@@ -15017,7 +15073,7 @@
      * @returns {Function} Returns the new function.
      * @example
      *
-     * var func = _.over(Math.max, Math.min);
+     * var func = _.over([Math.max, Math.min]);
      *
      * func(1, 2, 3, 4);
      * // => [4, 1]
@@ -15037,7 +15093,7 @@
      * @returns {Function} Returns the new function.
      * @example
      *
-     * var func = _.overEvery(Boolean, isFinite);
+     * var func = _.overEvery([Boolean, isFinite]);
      *
      * func('1');
      * // => true
@@ -15063,7 +15119,7 @@
      * @returns {Function} Returns the new function.
      * @example
      *
-     * var func = _.overSome(Boolean, isFinite);
+     * var func = _.overSome([Boolean, isFinite]);
      *
      * func('1');
      * // => true
@@ -15210,6 +15266,101 @@
      */
     var rangeRight = createRange(true);
 
+    /**
+     * A method that returns a new empty array.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.13.0
+     * @category Util
+     * @returns {Array} Returns the new empty array.
+     * @example
+     *
+     * var arrays = _.times(2, _.stubArray);
+     *
+     * console.log(arrays);
+     * // => [[], []]
+     *
+     * console.log(arrays[0] === arrays[1]);
+     * // => false
+     */
+    function stubArray() {
+      return [];
+    }
+
+    /**
+     * A method that returns `false`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.13.0
+     * @category Util
+     * @returns {boolean} Returns `false`.
+     * @example
+     *
+     * _.times(2, _.stubFalse);
+     * // => [false, false]
+     */
+    function stubFalse() {
+      return false;
+    }
+
+    /**
+     * A method that returns a new empty object.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.13.0
+     * @category Util
+     * @returns {Object} Returns the new empty object.
+     * @example
+     *
+     * var objects = _.times(2, _.stubObject);
+     *
+     * console.log(objects);
+     * // => [{}, {}]
+     *
+     * console.log(objects[0] === objects[1]);
+     * // => false
+     */
+    function stubObject() {
+      return {};
+    }
+
+    /**
+     * A method that returns an empty string.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.13.0
+     * @category Util
+     * @returns {string} Returns the empty string.
+     * @example
+     *
+     * _.times(2, _.stubString);
+     * // => ['', '']
+     */
+    function stubString() {
+      return '';
+    }
+
+    /**
+     * A method that returns `true`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.13.0
+     * @category Util
+     * @returns {boolean} Returns `true`.
+     * @example
+     *
+     * _.times(2, _.stubTrue);
+     * // => [true, true]
+     */
+    function stubTrue() {
+      return true;
+    }
+
     /**
      * Invokes the iteratee `n` times, returning an array of the results of
      * each invocation. The iteratee is invoked with one argument; (index).
@@ -15226,8 +15377,8 @@
      * _.times(3, String);
      * // => ['0', '1', '2']
      *
-     *  _.times(4, _.constant(true));
-     * // => [true, true, true, true]
+     *  _.times(4, _.constant(0));
+     * // => [0, 0, 0, 0]
      */
     function times(n, iteratee) {
       n = toInteger(n);
@@ -15263,15 +15414,6 @@
      *
      * _.toPath('a[0].b.c');
      * // => ['a', '0', 'b', 'c']
-     *
-     * var path = ['a', 'b', 'c'],
-     *     newPath = _.toPath(path);
-     *
-     * console.log(newPath);
-     * // => ['a', 'b', 'c']
-     *
-     * console.log(path === newPath);
-     * // => false
      */
     function toPath(value) {
       if (isArray(value)) {
@@ -15910,6 +16052,11 @@
     lodash.meanBy = meanBy;
     lodash.min = min;
     lodash.minBy = minBy;
+    lodash.stubArray = stubArray;
+    lodash.stubFalse = stubFalse;
+    lodash.stubObject = stubObject;
+    lodash.stubString = stubString;
+    lodash.stubTrue = stubTrue;
     lodash.multiply = multiply;
     lodash.nth = nth;
     lodash.noConflict = noConflict;
@@ -16216,7 +16363,7 @@
   // also prevents errors in cases where Lodash is loaded by a script tag in the
   // presence of an AMD loader. See http://requirejs.org/docs/errors.html#mismatch
   // for more details. Use `_.noConflict` to remove Lodash from the global object.
-  (freeWindow || freeSelf || {})._ = _;
+  (freeSelf || {})._ = _;
 
   // Some AMD build optimizers like r.js check for condition patterns like the following:
   if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
@@ -16227,11 +16374,9 @@
     });
   }
   // Check for `exports` after `define` in case a build optimizer adds an `exports` object.
-  else if (freeExports && freeModule) {
+  else if (freeModule) {
     // Export for Node.js.
-    if (moduleExports) {
-      (freeModule.exports = _)._ = _;
-    }
+    (freeModule.exports = _)._ = _;
     // Export for CommonJS support.
     freeExports._ = _;
   }
diff --git a/lodash.min.js b/lodash.min.js
index 9f27fc1b7..66f11d87c 100644
--- a/lodash.min.js
+++ b/lodash.min.js
@@ -2,124 +2,126 @@
  * @license
  * lodash lodash.com/license | Underscore.js 1.8.3 underscorejs.org/LICENSE
  */
-;(function(){function t(t,n){return t.set(n[0],n[1]),t}function n(t,n){return t.add(n),t}function r(t,n,r){switch(r.length){case 0:return t.call(n);case 1:return t.call(n,r[0]);case 2:return t.call(n,r[0],r[1]);case 3:return t.call(n,r[0],r[1],r[2])}return t.apply(n,r)}function e(t,n,r,e){for(var u=-1,o=t.length;++u<o;){var i=t[u];n(e,i,r(i),t)}return e}function u(t,n){for(var r=-1,e=t.length;++r<e&&false!==n(t[r],r,t););return t}function o(t,n){for(var r=t.length;r--&&false!==n(t[r],r,t););return t}function i(t,n){
-for(var r=-1,e=t.length;++r<e;)if(!n(t[r],r,t))return false;return true}function f(t,n){for(var r=-1,e=t.length,u=0,o=[];++r<e;){var i=t[r];n(i,r,t)&&(o[u++]=i)}return o}function c(t,n){return!!t.length&&-1<d(t,n,0)}function a(t,n,r){for(var e=-1,u=t.length;++e<u;)if(r(n,t[e]))return true;return false}function l(t,n){for(var r=-1,e=t.length,u=Array(e);++r<e;)u[r]=n(t[r],r,t);return u}function s(t,n){for(var r=-1,e=n.length,u=t.length;++r<e;)t[u+r]=n[r];return t}function h(t,n,r,e){var u=-1,o=t.length;for(e&&o&&(r=t[++u]);++u<o;)r=n(r,t[u],u,t);
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 Ct["[object Error]"]=Ct["[object Function]"]=Ct["[object WeakMap]"]=false;var zt={"\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","\xd1":"N","\xf1":"n","\xd2":"O","\xd3":"O","\xd4":"O","\xd5":"O","\xd6":"O",
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-},Nt=parseFloat,Pt=parseInt,Zt=Ft[typeof exports]&&exports&&!exports.nodeType?exports:T,Tt=Ft[typeof module]&&module&&!module.nodeType?module:T,qt=Tt&&Tt.exports===Zt?Zt:T,Vt=R(Ft[typeof self]&&self),Kt=R(Ft[typeof window]&&window),Gt=R(Ft[typeof this]&&this),Jt=R(Zt&&Tt&&typeof global=="object"&&global)||Kt!==(Gt&&Gt.window)&&Kt||Vt||Gt||Function("return this")(),Yt=Z();(Kt||Vt||{})._=Yt,typeof define=="function"&&typeof define.amd=="object"&&define.amd? define(function(){return Yt}):Zt&&Tt?(qt&&((Tt.exports=Yt)._=Yt),
-Zt._=Yt):Jt._=Yt}).call(this);
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+(qt||{})._=Gt,typeof define=="function"&&typeof define.amd=="object"&&define.amd? define(function(){return Gt}):Zt?((Zt.exports=Gt)._=Gt,Pt._=Gt):Kt._=Gt}).call(this);
\ No newline at end of file
diff --git a/noop.js b/noop.js
index 26e19c317..a682a4465 100644
--- a/noop.js
+++ b/noop.js
@@ -1,6 +1,5 @@
 /**
- * A no-operation function that returns `undefined` regardless of the
- * arguments it receives.
+ * A method that returns `undefined`.
  *
  * @static
  * @memberOf _
@@ -8,10 +7,8 @@
  * @category Util
  * @example
  *
- * var object = { 'user': 'fred' };
- *
- * _.noop(object) === undefined;
- * // => true
+ * _.times(2, _.noop);
+ * // => [undefined, undefined]
  */
 function noop() {
   // No operation performed.
diff --git a/now.js b/now.js
index c0656728c..5ad305033 100644
--- a/now.js
+++ b/now.js
@@ -5,7 +5,6 @@
  * @static
  * @memberOf _
  * @since 2.4.0
- * @type {Function}
  * @category Date
  * @returns {number} Returns the timestamp.
  * @example
@@ -13,8 +12,10 @@
  * _.defer(function(stamp) {
  *   console.log(_.now() - stamp);
  * }, _.now());
- * // => Logs the number of milliseconds it took for the deferred function to be invoked.
+ * // => Logs the number of milliseconds it took for the deferred invocation.
  */
-var now = Date.now;
+function now() {
+  return Date.now();
+}
 
 module.exports = now;
diff --git a/nth.js b/nth.js
index 857031ab8..8a344dee5 100644
--- a/nth.js
+++ b/nth.js
@@ -2,7 +2,7 @@ var baseNth = require('./_baseNth'),
     toInteger = require('./toInteger');
 
 /**
- * Gets the element at `n` index of `array`. If `n` is negative, the nth
+ * Gets the element at index `n` of `array`. If `n` is negative, the nth
  * element from the end is returned.
  *
  * @static
diff --git a/nthArg.js b/nthArg.js
index 2ac511fb6..7557653ae 100644
--- a/nthArg.js
+++ b/nthArg.js
@@ -3,7 +3,7 @@ var baseNth = require('./_baseNth'),
     toInteger = require('./toInteger');
 
 /**
- * Creates a function that gets the argument at `n` index. If `n` is negative,
+ * Creates a function that gets the argument at index `n`. If `n` is negative,
  * the nth argument from the end is returned.
  *
  * @static
diff --git a/over.js b/over.js
index 2275bf70d..5301d57f7 100644
--- a/over.js
+++ b/over.js
@@ -14,7 +14,7 @@ var arrayMap = require('./_arrayMap'),
  * @returns {Function} Returns the new function.
  * @example
  *
- * var func = _.over(Math.max, Math.min);
+ * var func = _.over([Math.max, Math.min]);
  *
  * func(1, 2, 3, 4);
  * // => [4, 1]
diff --git a/overArgs.js b/overArgs.js
index d6a746717..94f586b53 100644
--- a/overArgs.js
+++ b/overArgs.js
@@ -34,7 +34,7 @@ var nativeMin = Math.min;
  *
  * var func = _.overArgs(function(x, y) {
  *   return [x, y];
- * }, square, doubled);
+ * }, [square, doubled]);
  *
  * func(9, 3);
  * // => [81, 6]
diff --git a/overEvery.js b/overEvery.js
index 4ea596a7b..1af6b7398 100644
--- a/overEvery.js
+++ b/overEvery.js
@@ -14,7 +14,7 @@ var arrayEvery = require('./_arrayEvery'),
  * @returns {Function} Returns the new function.
  * @example
  *
- * var func = _.overEvery(Boolean, isFinite);
+ * var func = _.overEvery([Boolean, isFinite]);
  *
  * func('1');
  * // => true
diff --git a/overSome.js b/overSome.js
index 55ff733f7..9e3fe95c6 100644
--- a/overSome.js
+++ b/overSome.js
@@ -14,7 +14,7 @@ var arraySome = require('./_arraySome'),
  * @returns {Function} Returns the new function.
  * @example
  *
- * var func = _.overSome(Boolean, isFinite);
+ * var func = _.overSome([Boolean, isFinite]);
  *
  * func('1');
  * // => true
diff --git a/package.json b/package.json
index c3eda6a89..9ce433ca2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash",
-  "version": "4.12.0",
+  "version": "4.13.0",
   "description": "Lodash modular utilities.",
   "keywords": "modules, stdlib, util",
   "homepage": "https://lodash.com/",
diff --git a/pull.js b/pull.js
index f5846fbc1..74b2771da 100644
--- a/pull.js
+++ b/pull.js
@@ -18,11 +18,11 @@ var pullAll = require('./pullAll'),
  * @returns {Array} Returns `array`.
  * @example
  *
- * var array = [1, 2, 3, 1, 2, 3];
+ * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
  *
- * _.pull(array, 2, 3);
+ * _.pull(array, 'a', 'c');
  * console.log(array);
- * // => [1, 1]
+ * // => ['b', 'b']
  */
 var pull = rest(pullAll);
 
diff --git a/pullAll.js b/pullAll.js
index d6ce1bf80..f4605c212 100644
--- a/pullAll.js
+++ b/pullAll.js
@@ -14,11 +14,11 @@ var basePullAll = require('./_basePullAll');
  * @returns {Array} Returns `array`.
  * @example
  *
- * var array = [1, 2, 3, 1, 2, 3];
+ * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
  *
- * _.pullAll(array, [2, 3]);
+ * _.pullAll(array, ['a', 'c']);
  * console.log(array);
- * // => [1, 1]
+ * // => ['b', 'b']
  */
 function pullAll(array, values) {
   return (array && array.length && values && values.length)
diff --git a/pullAt.js b/pullAt.js
index 565d2b1c8..01e566e62 100644
--- a/pullAt.js
+++ b/pullAt.js
@@ -21,14 +21,14 @@ var arrayMap = require('./_arrayMap'),
  * @returns {Array} Returns the new array of removed elements.
  * @example
  *
- * var array = [5, 10, 15, 20];
- * var evens = _.pullAt(array, 1, 3);
+ * var array = ['a', 'b', 'c', 'd'];
+ * var pulled = _.pullAt(array, [1, 3]);
  *
  * console.log(array);
- * // => [5, 15]
+ * // => ['a', 'c']
  *
- * console.log(evens);
- * // => [10, 20]
+ * console.log(pulled);
+ * // => ['b', 'd']
  */
 var pullAt = rest(function(array, indexes) {
   indexes = baseFlatten(indexes, 1);
diff --git a/rearg.js b/rearg.js
index 6648ec834..b098d80d3 100644
--- a/rearg.js
+++ b/rearg.js
@@ -22,7 +22,7 @@ var REARG_FLAG = 256;
  *
  * var rearged = _.rearg(function(a, b, c) {
  *   return [a, b, c];
- * }, 2, 0, 1);
+ * }, [2, 0, 1]);
  *
  * rearged('b', 'c', 'a')
  * // => ['a', 'b', 'c']
diff --git a/sortedIndex.js b/sortedIndex.js
index 044a57e56..e763473ac 100644
--- a/sortedIndex.js
+++ b/sortedIndex.js
@@ -16,9 +16,6 @@ var baseSortedIndex = require('./_baseSortedIndex');
  *
  * _.sortedIndex([30, 50], 40);
  * // => 1
- *
- * _.sortedIndex([4, 5], 4);
- * // => 0
  */
 function sortedIndex(array, value) {
   return baseSortedIndex(array, value);
diff --git a/sortedIndexBy.js b/sortedIndexBy.js
index df05972a3..0326eb77f 100644
--- a/sortedIndexBy.js
+++ b/sortedIndexBy.js
@@ -18,13 +18,13 @@ var baseIteratee = require('./_baseIteratee'),
  *  into `array`.
  * @example
  *
- * var dict = { 'thirty': 30, 'forty': 40, 'fifty': 50 };
+ * var objects = [{ 'x': 4 }, { 'x': 5 }];
  *
- * _.sortedIndexBy(['thirty', 'fifty'], 'forty', _.propertyOf(dict));
- * // => 1
+ * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+ * // => 0
  *
  * // The `_.property` iteratee shorthand.
- * _.sortedIndexBy([{ 'x': 4 }, { 'x': 5 }], { 'x': 4 }, 'x');
+ * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
  * // => 0
  */
 function sortedIndexBy(array, value, iteratee) {
diff --git a/sortedIndexOf.js b/sortedIndexOf.js
index 2c534d324..72d65d8aa 100644
--- a/sortedIndexOf.js
+++ b/sortedIndexOf.js
@@ -14,8 +14,8 @@ var baseSortedIndex = require('./_baseSortedIndex'),
  * @returns {number} Returns the index of the matched value, else `-1`.
  * @example
  *
- * _.sortedIndexOf([1, 1, 2, 2], 2);
- * // => 2
+ * _.sortedIndexOf([4, 5, 5, 5, 6], 5);
+ * // => 1
  */
 function sortedIndexOf(array, value) {
   var length = array ? array.length : 0;
diff --git a/sortedLastIndex.js b/sortedLastIndex.js
index 919089f4a..9380cb9cb 100644
--- a/sortedLastIndex.js
+++ b/sortedLastIndex.js
@@ -15,8 +15,8 @@ var baseSortedIndex = require('./_baseSortedIndex');
  *  into `array`.
  * @example
  *
- * _.sortedLastIndex([4, 5], 4);
- * // => 1
+ * _.sortedLastIndex([4, 5, 5, 5, 6], 5);
+ * // => 4
  */
 function sortedLastIndex(array, value) {
   return baseSortedIndex(array, value, true);
diff --git a/sortedLastIndexBy.js b/sortedLastIndexBy.js
index 74e8d7acb..f2ba954a3 100644
--- a/sortedLastIndexBy.js
+++ b/sortedLastIndexBy.js
@@ -18,8 +18,13 @@ var baseIteratee = require('./_baseIteratee'),
  *  into `array`.
  * @example
  *
+ * var objects = [{ 'x': 4 }, { 'x': 5 }];
+ *
+ * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+ * // => 1
+ *
  * // The `_.property` iteratee shorthand.
- * _.sortedLastIndexBy([{ 'x': 4 }, { 'x': 5 }], { 'x': 4 }, 'x');
+ * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
  * // => 1
  */
 function sortedLastIndexBy(array, value, iteratee) {
diff --git a/sortedLastIndexOf.js b/sortedLastIndexOf.js
index 80234de2d..5ff351d68 100644
--- a/sortedLastIndexOf.js
+++ b/sortedLastIndexOf.js
@@ -14,7 +14,7 @@ var baseSortedIndex = require('./_baseSortedIndex'),
  * @returns {number} Returns the index of the matched value, else `-1`.
  * @example
  *
- * _.sortedLastIndexOf([1, 1, 2, 2], 2);
+ * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
  * // => 3
  */
 function sortedLastIndexOf(array, value) {
diff --git a/stubArray.js b/stubArray.js
new file mode 100644
index 000000000..16cbf9956
--- /dev/null
+++ b/stubArray.js
@@ -0,0 +1,23 @@
+/**
+ * A method that returns a new empty array.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {Array} Returns the new empty array.
+ * @example
+ *
+ * var arrays = _.times(2, _.stubArray);
+ *
+ * console.log(arrays);
+ * // => [[], []]
+ *
+ * console.log(arrays[0] === arrays[1]);
+ * // => false
+ */
+function stubArray() {
+  return [];
+}
+
+module.exports = stubArray;
diff --git a/stubFalse.js b/stubFalse.js
new file mode 100644
index 000000000..4498027b3
--- /dev/null
+++ b/stubFalse.js
@@ -0,0 +1,18 @@
+/**
+ * A method that returns `false`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {boolean} Returns `false`.
+ * @example
+ *
+ * _.times(2, _.stubFalse);
+ * // => [false, false]
+ */
+function stubFalse() {
+  return false;
+}
+
+module.exports = stubFalse;
diff --git a/stubObject.js b/stubObject.js
new file mode 100644
index 000000000..9da12c209
--- /dev/null
+++ b/stubObject.js
@@ -0,0 +1,23 @@
+/**
+ * A method that returns a new empty object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {Object} Returns the new empty object.
+ * @example
+ *
+ * var objects = _.times(2, _.stubObject);
+ *
+ * console.log(objects);
+ * // => [{}, {}]
+ *
+ * console.log(objects[0] === objects[1]);
+ * // => false
+ */
+function stubObject() {
+  return {};
+}
+
+module.exports = stubObject;
diff --git a/stubString.js b/stubString.js
new file mode 100644
index 000000000..2f14bcf5c
--- /dev/null
+++ b/stubString.js
@@ -0,0 +1,18 @@
+/**
+ * A method that returns an empty string.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {string} Returns the empty string.
+ * @example
+ *
+ * _.times(2, _.stubString);
+ * // => ['', '']
+ */
+function stubString() {
+  return '';
+}
+
+module.exports = stubString;
diff --git a/stubTrue.js b/stubTrue.js
new file mode 100644
index 000000000..c166806e1
--- /dev/null
+++ b/stubTrue.js
@@ -0,0 +1,18 @@
+/**
+ * A method that returns `true`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {boolean} Returns `true`.
+ * @example
+ *
+ * _.times(2, _.stubTrue);
+ * // => [true, true]
+ */
+function stubTrue() {
+  return true;
+}
+
+module.exports = stubTrue;
diff --git a/times.js b/times.js
index d0bff577a..607838fb4 100644
--- a/times.js
+++ b/times.js
@@ -27,8 +27,8 @@ var nativeMin = Math.min;
  * _.times(3, String);
  * // => ['0', '1', '2']
  *
- *  _.times(4, _.constant(true));
- * // => [true, true, true, true]
+ *  _.times(4, _.constant(0));
+ * // => [0, 0, 0, 0]
  */
 function times(n, iteratee) {
   n = toInteger(n);
diff --git a/toInteger.js b/toInteger.js
index 4604fb92e..49fd28dc7 100644
--- a/toInteger.js
+++ b/toInteger.js
@@ -3,7 +3,7 @@ var toFinite = require('./toFinite');
 /**
  * Converts `value` to an integer.
  *
- * **Note:** This function is loosely based on
+ * **Note:** This method is loosely based on
  * [`ToInteger`](http://www.ecma-international.org/ecma-262/6.0/#sec-tointeger).
  *
  * @static
diff --git a/toPath.js b/toPath.js
index e2dc7ae7e..c9e8e4b2b 100644
--- a/toPath.js
+++ b/toPath.js
@@ -21,15 +21,6 @@ var arrayMap = require('./_arrayMap'),
  *
  * _.toPath('a[0].b.c');
  * // => ['a', '0', 'b', 'c']
- *
- * var path = ['a', 'b', 'c'],
- *     newPath = _.toPath(path);
- *
- * console.log(newPath);
- * // => ['a', 'b', 'c']
- *
- * console.log(path === newPath);
- * // => false
  */
 function toPath(value) {
   if (isArray(value)) {
diff --git a/transform.js b/transform.js
index 3013a83cb..f438ed8fe 100644
--- a/transform.js
+++ b/transform.js
@@ -12,15 +12,16 @@ var arrayEach = require('./_arrayEach'),
  * An alternative to `_.reduce`; this method transforms `object` to a new
  * `accumulator` object which is the result of running each of its own
  * enumerable string keyed properties thru `iteratee`, with each invocation
- * potentially mutating the `accumulator` object. The iteratee is invoked
- * with four arguments: (accumulator, value, key, object). Iteratee functions
- * may exit iteration early by explicitly returning `false`.
+ * potentially mutating the `accumulator` object. If `accumulator` is not
+ * provided, a new object with the same `[[Prototype]]` will be used. The
+ * iteratee is invoked with four arguments: (accumulator, value, key, object).
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
  *
  * @static
  * @memberOf _
  * @since 1.3.0
  * @category Object
- * @param {Array|Object} object The object to iterate over.
+ * @param {Object} object The object to iterate over.
  * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  * @param {*} [accumulator] The custom accumulator value.
  * @returns {*} Returns the accumulated value.
diff --git a/union.js b/union.js
index 1276c886a..80e64b5eb 100644
--- a/union.js
+++ b/union.js
@@ -16,8 +16,8 @@ var baseFlatten = require('./_baseFlatten'),
  * @returns {Array} Returns the new array of combined values.
  * @example
  *
- * _.union([2, 1], [4, 2], [1, 2]);
- * // => [2, 1, 4]
+ * _.union([2], [1, 2]);
+ * // => [2, 1]
  */
 var union = rest(function(arrays) {
   return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
diff --git a/unionBy.js b/unionBy.js
index f44340cb0..6d6fe2b03 100644
--- a/unionBy.js
+++ b/unionBy.js
@@ -21,8 +21,8 @@ var baseFlatten = require('./_baseFlatten'),
  * @returns {Array} Returns the new array of combined values.
  * @example
  *
- * _.unionBy([2.1, 1.2], [4.3, 2.4], Math.floor);
- * // => [2.1, 1.2, 4.3]
+ * _.unionBy([2.1], [1.2, 2.3], Math.floor);
+ * // => [2.1, 1.2]
  *
  * // The `_.property` iteratee shorthand.
  * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
diff --git a/uniqWith.js b/uniqWith.js
index 957c17d6a..e09b1729e 100644
--- a/uniqWith.js
+++ b/uniqWith.js
@@ -14,7 +14,7 @@ var baseUniq = require('./_baseUniq');
  * @returns {Array} Returns the new duplicate free array.
  * @example
  *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 },  { 'x': 1, 'y': 2 }];
+ * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
  *
  * _.uniqWith(objects, _.isEqual);
  * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
diff --git a/util.js b/util.js
index 11b03723e..156972273 100644
--- a/util.js
+++ b/util.js
@@ -22,6 +22,11 @@ module.exports = {
   'propertyOf': require('./propertyOf'),
   'range': require('./range'),
   'rangeRight': require('./rangeRight'),
+  'stubArray': require('./stubArray'),
+  'stubFalse': require('./stubFalse'),
+  'stubObject': require('./stubObject'),
+  'stubString': require('./stubString'),
+  'stubTrue': require('./stubTrue'),
   'times': require('./times'),
   'toPath': require('./toPath'),
   'uniqueId': require('./uniqueId')
diff --git a/without.js b/without.js
index c9640a462..6198490a3 100644
--- a/without.js
+++ b/without.js
@@ -17,7 +17,7 @@ var baseDifference = require('./_baseDifference'),
  * @see _.difference, _.xor
  * @example
  *
- * _.without([1, 2, 1, 3], 1, 2);
+ * _.without([2, 1, 2, 3], 1, 2);
  * // => [3]
  */
 var without = rest(function(array, values) {
diff --git a/wrapperAt.js b/wrapperAt.js
index 119089453..4a3eacc35 100644
--- a/wrapperAt.js
+++ b/wrapperAt.js
@@ -21,9 +21,6 @@ var LazyWrapper = require('./_LazyWrapper'),
  *
  * _(object).at(['a[0].b.c', 'a[1]']).value();
  * // => [3, 4]
- *
- * _(['a', 'b', 'c']).at(0, 2).value();
- * // => ['a', 'c']
  */
 var wrapperAt = rest(function(paths) {
   paths = baseFlatten(paths, 1);
diff --git a/wrapperLodash.js b/wrapperLodash.js
index 0cde82ba0..ef84f2519 100644
--- a/wrapperLodash.js
+++ b/wrapperLodash.js
@@ -86,19 +86,21 @@ var hasOwnProperty = objectProto.hasOwnProperty;
  * `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`, `isBoolean`,
  * `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`, `isEqualWith`,
  * `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`, `isMap`,
- * `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`, `isNumber`,
- * `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`, `isSafeInteger`,
- * `isSet`, `isString`, `isUndefined`, `isTypedArray`, `isWeakMap`, `isWeakSet`,
- * `join`, `kebabCase`, `last`, `lastIndexOf`, `lowerCase`, `lowerFirst`,
- * `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`, `min`, `minBy`, `multiply`,
- * `noConflict`, `noop`, `now`, `nth`, `pad`, `padEnd`, `padStart`, `parseInt`,
- * `pop`, `random`, `reduce`, `reduceRight`, `repeat`, `result`, `round`,
- * `runInContext`, `sample`, `shift`, `size`, `snakeCase`, `some`, `sortedIndex`,
- * `sortedIndexBy`, `sortedLastIndex`, `sortedLastIndexBy`, `startCase`,
- * `startsWith`, `subtract`, `sum`, `sumBy`, `template`, `times`, `toFinite`,
- * `toInteger`, `toJSON`, `toLength`, `toLower`, `toNumber`, `toSafeInteger`,
- * `toString`, `toUpper`, `trim`, `trimEnd`, `trimStart`, `truncate`, `unescape`,
- * `uniqueId`, `upperCase`, `upperFirst`, `value`, and `words`
+ * `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
+ * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
+ * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
+ * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
+ * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
+ * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
+ * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
+ * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
+ * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
+ * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
+ * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
+ * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
+ * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
+ * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
+ * `upperFirst`, `value`, and `words`
  *
  * @name _
  * @constructor
diff --git a/xor.js b/xor.js
index 2251d2c92..ad63b6254 100644
--- a/xor.js
+++ b/xor.js
@@ -18,8 +18,8 @@ var arrayFilter = require('./_arrayFilter'),
  * @see _.difference, _.without
  * @example
  *
- * _.xor([2, 1], [4, 2]);
- * // => [1, 4]
+ * _.xor([2, 1], [2, 3]);
+ * // => [1, 3]
  */
 var xor = rest(function(arrays) {
   return baseXor(arrayFilter(arrays, isArrayLikeObject));
diff --git a/xorBy.js b/xorBy.js
index d5274eae0..924f82d2c 100644
--- a/xorBy.js
+++ b/xorBy.js
@@ -21,8 +21,8 @@ var arrayFilter = require('./_arrayFilter'),
  * @returns {Array} Returns the new array of filtered values.
  * @example
  *
- * _.xorBy([2.1, 1.2], [4.3, 2.4], Math.floor);
- * // => [1.2, 4.3]
+ * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+ * // => [1.2, 3.4]
  *
  * // The `_.property` iteratee shorthand.
  * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');