diff --git a/LICENSE b/LICENSE
index b054ca5a3..bcbe13d67 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,22 +1,23 @@
+The MIT License (MIT)
+
 Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
 Based on Underscore.js, copyright 2009-2016 Jeremy Ashkenas,
 DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>
 
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
index 425f0e955..402a960b6 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# lodash-es v4.2.1
+# lodash-es v4.3.0
 
 The [lodash](https://lodash.com/) library exported as [ES](http://www.ecma-international.org/ecma-262/6.0/) modules.
 
@@ -7,4 +7,4 @@ Generated using [lodash-cli](https://www.npmjs.com/package/lodash-cli):
 $ lodash modularize exports=es -o ./
 ```
 
-See the [package source](https://github.com/lodash/lodash/tree/4.2.1-es) for more details.
+See the [package source](https://github.com/lodash/lodash/tree/4.3.0-es) for more details.
diff --git a/_baseClone.js b/_baseClone.js
index c80942113..01a95cf1b 100644
--- a/_baseClone.js
+++ b/_baseClone.js
@@ -3,6 +3,7 @@ import arrayEach from './_arrayEach';
 import assignValue from './_assignValue';
 import baseAssign from './_baseAssign';
 import baseForOwn from './_baseForOwn';
+import cloneBuffer from './_cloneBuffer';
 import copyArray from './_copyArray';
 import copySymbols from './_copySymbols';
 import getTag from './_getTag';
@@ -10,6 +11,7 @@ import initCloneArray from './_initCloneArray';
 import initCloneByTag from './_initCloneByTag';
 import initCloneObject from './_initCloneObject';
 import isArray from './isArray';
+import isBuffer from './isBuffer';
 import isHostObject from './_isHostObject';
 import isObject from './isObject';
 
@@ -91,6 +93,9 @@ function baseClone(value, isDeep, customizer, key, object, stack) {
     var tag = getTag(value),
         isFunc = tag == funcTag || tag == genTag;
 
+    if (isBuffer(value)) {
+      return cloneBuffer(value, isDeep);
+    }
     if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
       if (isHostObject(value)) {
         return object ? value : {};
diff --git a/_baseDelay.js b/_baseDelay.js
index f674ec780..a0ca3892b 100644
--- a/_baseDelay.js
+++ b/_baseDelay.js
@@ -8,7 +8,7 @@ var FUNC_ERROR_TEXT = 'Expected a function';
  * @private
  * @param {Function} func The function to delay.
  * @param {number} wait The number of milliseconds to delay invocation.
- * @param {Object} args The arguments provide to `func`.
+ * @param {Object} args The arguments to provide to `func`.
  * @returns {number} Returns the timer id.
  */
 function baseDelay(func, wait, args) {
diff --git a/_baseFunctions.js b/_baseFunctions.js
index d860b7db7..45f0be6aa 100644
--- a/_baseFunctions.js
+++ b/_baseFunctions.js
@@ -3,7 +3,7 @@ import isFunction from './isFunction';
 
 /**
  * The base implementation of `_.functions` which creates an array of
- * `object` function property names filtered from those provided.
+ * `object` function property names filtered from `props`.
  *
  * @private
  * @param {Object} object The object to inspect.
diff --git a/_cloneArrayBuffer.js b/_cloneArrayBuffer.js
new file mode 100644
index 000000000..ad319449f
--- /dev/null
+++ b/_cloneArrayBuffer.js
@@ -0,0 +1,19 @@
+import Uint8Array from './_Uint8Array';
+
+/**
+ * Creates a clone of `arrayBuffer`.
+ *
+ * @private
+ * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
+ * @returns {ArrayBuffer} Returns the cloned array buffer.
+ */
+function cloneArrayBuffer(arrayBuffer) {
+  var Ctor = arrayBuffer.constructor,
+      result = new Ctor(arrayBuffer.byteLength),
+      view = new Uint8Array(result);
+
+  view.set(new Uint8Array(arrayBuffer));
+  return result;
+}
+
+export default cloneArrayBuffer;
diff --git a/_cloneBuffer.js b/_cloneBuffer.js
index 24986f3c6..0619230af 100644
--- a/_cloneBuffer.js
+++ b/_cloneBuffer.js
@@ -1,18 +1,19 @@
-import Uint8Array from './_Uint8Array';
-
 /**
- * Creates a clone of `buffer`.
+ * Creates a clone of  `buffer`.
  *
  * @private
- * @param {ArrayBuffer} buffer The array buffer to clone.
- * @returns {ArrayBuffer} Returns the cloned array buffer.
+ * @param {Buffer} buffer The buffer to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Buffer} Returns the cloned buffer.
  */
-function cloneBuffer(buffer) {
+function cloneBuffer(buffer, isDeep) {
+  if (isDeep) {
+    return buffer.slice();
+  }
   var Ctor = buffer.constructor,
-      result = new Ctor(buffer.byteLength),
-      view = new Uint8Array(result);
+      result = new Ctor(buffer.length);
 
-  view.set(new Uint8Array(buffer));
+  buffer.copy(result);
   return result;
 }
 
diff --git a/_cloneTypedArray.js b/_cloneTypedArray.js
index ae15df170..2fe9d7d6b 100644
--- a/_cloneTypedArray.js
+++ b/_cloneTypedArray.js
@@ -1,4 +1,4 @@
-import cloneBuffer from './_cloneBuffer';
+import cloneArrayBuffer from './_cloneArrayBuffer';
 
 /**
  * Creates a clone of `typedArray`.
@@ -12,7 +12,7 @@ function cloneTypedArray(typedArray, isDeep) {
   var buffer = typedArray.buffer,
       Ctor = typedArray.constructor;
 
-  return new Ctor(isDeep ? cloneBuffer(buffer) : buffer, typedArray.byteOffset, typedArray.length);
+  return new Ctor(isDeep ? cloneArrayBuffer(buffer) : buffer, typedArray.byteOffset, typedArray.length);
 }
 
 export default cloneTypedArray;
diff --git a/_getTag.js b/_getTag.js
index 0b756c767..c4c7e8bd0 100644
--- a/_getTag.js
+++ b/_getTag.js
@@ -1,10 +1,12 @@
 import Map from './_Map';
 import Set from './_Set';
+import WeakMap from './_WeakMap';
 
 /** `Object#toString` result references. */
 var mapTag = '[object Map]',
     objectTag = '[object Object]',
-    setTag = '[object Set]';
+    setTag = '[object Set]',
+    weakMapTag = '[object WeakMap]';
 
 /** Used for built-in method references. */
 var objectProto = Object.prototype;
@@ -18,9 +20,10 @@ var funcToString = Function.prototype.toString;
  */
 var objectToString = objectProto.toString;
 
-/** Used to detect maps and sets. */
+/** Used to detect maps, sets, and weakmaps. */
 var mapCtorString = Map ? funcToString.call(Map) : '',
-    setCtorString = Set ? funcToString.call(Set) : '';
+    setCtorString = Set ? funcToString.call(Set) : '',
+    weakMapCtorString = WeakMap ? funcToString.call(WeakMap) : '';
 
 /**
  * Gets the `toStringTag` of `value`.
@@ -33,19 +36,20 @@ function getTag(value) {
   return objectToString.call(value);
 }
 
-// Fallback for IE 11 providing `toStringTag` values for maps and sets.
-if ((Map && getTag(new Map) != mapTag) || (Set && getTag(new Set) != setTag)) {
+// Fallback for IE 11 providing `toStringTag` values for maps, sets, and weakmaps.
+if ((Map && getTag(new Map) != mapTag) ||
+    (Set && getTag(new Set) != setTag) ||
+    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
   getTag = function(value) {
     var result = objectToString.call(value),
         Ctor = result == objectTag ? value.constructor : null,
         ctorString = typeof Ctor == 'function' ? funcToString.call(Ctor) : '';
 
     if (ctorString) {
-      if (ctorString == mapCtorString) {
-        return mapTag;
-      }
-      if (ctorString == setCtorString) {
-        return setTag;
+      switch (ctorString) {
+        case mapCtorString: return mapTag;
+        case setCtorString: return setTag;
+        case weakMapCtorString: return weakMapTag;
       }
     }
     return result;
diff --git a/_initCloneByTag.js b/_initCloneByTag.js
index b46b625bb..0d4ea096f 100644
--- a/_initCloneByTag.js
+++ b/_initCloneByTag.js
@@ -1,4 +1,4 @@
-import cloneBuffer from './_cloneBuffer';
+import cloneArrayBuffer from './_cloneArrayBuffer';
 import cloneMap from './_cloneMap';
 import cloneRegExp from './_cloneRegExp';
 import cloneSet from './_cloneSet';
@@ -42,7 +42,7 @@ function initCloneByTag(object, tag, isDeep) {
   var Ctor = object.constructor;
   switch (tag) {
     case arrayBufferTag:
-      return cloneBuffer(object);
+      return cloneArrayBuffer(object);
 
     case boolTag:
     case dateTag:
diff --git a/_isIterateeCall.js b/_isIterateeCall.js
index d8174b1da..23ff37d33 100644
--- a/_isIterateeCall.js
+++ b/_isIterateeCall.js
@@ -4,7 +4,7 @@ import isIndex from './_isIndex';
 import isObject from './isObject';
 
 /**
- * Checks if the provided arguments are from an iteratee call.
+ * Checks if the given arguments are from an iteratee call.
  *
  * @private
  * @param {*} value The potential iteratee value argument.
diff --git a/add.js b/add.js
index 2a6fcb142..efa6e37e0 100644
--- a/add.js
+++ b/add.js
@@ -14,6 +14,9 @@
  */
 function add(augend, addend) {
   var result;
+  if (augend === undefined && addend === undefined) {
+    return 0;
+  }
   if (augend !== undefined) {
     result = augend;
   }
diff --git a/bind.js b/bind.js
index 961641f18..350ff3d54 100644
--- a/bind.js
+++ b/bind.js
@@ -52,4 +52,7 @@ var bind = rest(function(func, thisArg, partials) {
   return createWrapper(func, bitmask, thisArg, partials, holders);
 });
 
+// Assign default placeholders.
+bind.placeholder = {};
+
 export default bind;
diff --git a/bindKey.js b/bindKey.js
index efd2c1262..c0bfd695c 100644
--- a/bindKey.js
+++ b/bindKey.js
@@ -62,4 +62,7 @@ var bindKey = rest(function(object, key, partials) {
   return createWrapper(key, bitmask, object, partials, holders);
 });
 
+// Assign default placeholders.
+bindKey.placeholder = {};
+
 export default bindKey;
diff --git a/create.js b/create.js
index 8cca55c2a..77f0530b0 100644
--- a/create.js
+++ b/create.js
@@ -3,7 +3,7 @@ import baseCreate from './_baseCreate';
 
 /**
  * Creates an object that inherits from the `prototype` object. If a `properties`
- * object is provided its own enumerable properties are assigned to the created object.
+ * object is given its own enumerable properties are assigned to the created object.
  *
  * @static
  * @memberOf _
diff --git a/curry.js b/curry.js
index 4c0b97919..ce0137167 100644
--- a/curry.js
+++ b/curry.js
@@ -50,4 +50,7 @@ function curry(func, arity, guard) {
   return result;
 }
 
+// Assign default placeholders.
+curry.placeholder = {};
+
 export default curry;
diff --git a/curryRight.js b/curryRight.js
index 32c5be3cd..350b84a26 100644
--- a/curryRight.js
+++ b/curryRight.js
@@ -47,4 +47,7 @@ function curryRight(func, arity, guard) {
   return result;
 }
 
+// Assign default placeholders.
+curryRight.placeholder = {};
+
 export default curryRight;
diff --git a/debounce.js b/debounce.js
index 96e1787c4..539776d31 100644
--- a/debounce.js
+++ b/debounce.js
@@ -135,7 +135,7 @@ function debounce(func, wait, options) {
     if (maxWait === false) {
       var leadingCall = leading && !timeoutId;
     } else {
-      if (!maxTimeoutId && !leading) {
+      if (!lastCalled && !maxTimeoutId && !leading) {
         lastCalled = stamp;
       }
       var remaining = maxWait - (stamp - lastCalled),
diff --git a/difference.js b/difference.js
index 111d5adc2..8691b4494 100644
--- a/difference.js
+++ b/difference.js
@@ -5,7 +5,7 @@ import rest from './rest';
 
 /**
  * Creates an array of unique `array` values not included in the other
- * provided arrays using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * given arrays using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
  * for equality comparisons.
  *
  * @static
diff --git a/flow.js b/flow.js
index 865a0feff..3a384b447 100644
--- a/flow.js
+++ b/flow.js
@@ -1,9 +1,9 @@
 import createFlow from './_createFlow';
 
 /**
- * Creates a function that returns the result of invoking the provided
- * functions with the `this` binding of the created function, where each
- * successive invocation is supplied the return value of the previous.
+ * Creates a function that returns the result of invoking the given functions
+ * with the `this` binding of the created function, where each successive
+ * invocation is supplied the return value of the previous.
  *
  * @static
  * @memberOf _
diff --git a/flowRight.js b/flowRight.js
index fe6b55bb1..23908eaba 100644
--- a/flowRight.js
+++ b/flowRight.js
@@ -2,7 +2,7 @@ import createFlow from './_createFlow';
 
 /**
  * This method is like `_.flow` except that it creates a function that
- * invokes the provided functions from right to left.
+ * invokes the given functions from right to left.
  *
  * @static
  * @memberOf _
diff --git a/identity.js b/identity.js
index c6101d9d7..61a4e448d 100644
--- a/identity.js
+++ b/identity.js
@@ -1,5 +1,5 @@
 /**
- * This method returns the first argument provided to it.
+ * This method returns the first argument given to it.
  *
  * @static
  * @memberOf _
diff --git a/intersection.js b/intersection.js
index 8d03b3195..4de5a206e 100644
--- a/intersection.js
+++ b/intersection.js
@@ -4,8 +4,8 @@ import rest from './rest';
 import toArrayLikeObject from './_toArrayLikeObject';
 
 /**
- * Creates an array of unique values that are included in all of the provided
- * arrays using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * Creates an array of unique values that are included in all given arrays
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
  * for equality comparisons.
  *
  * @static
diff --git a/isArrayBuffer.js b/isArrayBuffer.js
new file mode 100644
index 000000000..4bbfe8e4f
--- /dev/null
+++ b/isArrayBuffer.js
@@ -0,0 +1,35 @@
+import isObjectLike from './isObjectLike';
+
+var arrayBufferTag = '[object ArrayBuffer]';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/**
+ * Checks if `value` is classified as an `ArrayBuffer` object.
+ *
+ * @static
+ * @memberOf _
+ * @type Function
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @example
+ *
+ * _.isArrayBuffer(new ArrayBuffer(2));
+ * // => true
+ *
+ * _.isArrayBuffer(new Array(2));
+ * // => false
+ */
+function isArrayBuffer(value) {
+  return isObjectLike(value) && objectToString.call(value) == arrayBufferTag;
+}
+
+export default isArrayBuffer;
diff --git a/isBuffer.js b/isBuffer.js
new file mode 100644
index 000000000..d092a94f2
--- /dev/null
+++ b/isBuffer.js
@@ -0,0 +1,42 @@
+import constant from './constant';
+import root from './_root';
+
+/** 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 : null;
+
+/** Detect free variable `module`. */
+var freeModule = (objectTypes[typeof module] && module && !module.nodeType) ? module : null;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = (freeModule && freeModule.exports === freeExports) ? freeExports : null;
+
+/** Built-in value references. */
+var Buffer = moduleExports ? root.Buffer : undefined;
+
+/**
+ * Checks if `value` is a buffer.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
+ * @example
+ *
+ * _.isBuffer(new Buffer(2));
+ * // => true
+ *
+ * _.isBuffer(new Uint8Array(2));
+ * // => false
+ */
+var isBuffer = !Buffer ? constant(false) : function(value) {
+  return value instanceof Buffer;
+};
+
+export default isBuffer;
diff --git a/isMap.js b/isMap.js
new file mode 100644
index 000000000..7c4a6bae4
--- /dev/null
+++ b/isMap.js
@@ -0,0 +1,27 @@
+import getTag from './_getTag';
+import isObjectLike from './isObjectLike';
+
+/** `Object#toString` result references. */
+var mapTag = '[object Map]';
+
+/**
+ * Checks if `value` is classified as a `Map` object.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @example
+ *
+ * _.isMap(new Map);
+ * // => true
+ *
+ * _.isMap(new WeakMap);
+ * // => false
+ */
+function isMap(value) {
+  return isObjectLike(value) && getTag(value) == mapTag;
+}
+
+export default isMap;
diff --git a/isSet.js b/isSet.js
new file mode 100644
index 000000000..0e7032f10
--- /dev/null
+++ b/isSet.js
@@ -0,0 +1,27 @@
+import getTag from './_getTag';
+import isObjectLike from './isObjectLike';
+
+/** `Object#toString` result references. */
+var setTag = '[object Set]';
+
+/**
+ * Checks if `value` is classified as a `Set` object.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @example
+ *
+ * _.isSet(new Set);
+ * // => true
+ *
+ * _.isSet(new WeakSet);
+ * // => false
+ */
+function isSet(value) {
+  return isObjectLike(value) && getTag(value) == setTag;
+}
+
+export default isSet;
diff --git a/isWeakMap.js b/isWeakMap.js
new file mode 100644
index 000000000..f7d92a3c2
--- /dev/null
+++ b/isWeakMap.js
@@ -0,0 +1,27 @@
+import getTag from './_getTag';
+import isObjectLike from './isObjectLike';
+
+/** `Object#toString` result references. */
+var weakMapTag = '[object WeakMap]';
+
+/**
+ * Checks if `value` is classified as a `WeakMap` object.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @example
+ *
+ * _.isWeakMap(new WeakMap);
+ * // => true
+ *
+ * _.isWeakMap(new Map);
+ * // => false
+ */
+function isWeakMap(value) {
+  return isObjectLike(value) && getTag(value) == weakMapTag;
+}
+
+export default isWeakMap;
diff --git a/isWeakSet.js b/isWeakSet.js
new file mode 100644
index 000000000..9567f6b64
--- /dev/null
+++ b/isWeakSet.js
@@ -0,0 +1,35 @@
+import isObjectLike from './isObjectLike';
+
+/** `Object#toString` result references. */
+var weakSetTag = '[object WeakSet]';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/**
+ * Checks if `value` is classified as a `WeakSet` object.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @example
+ *
+ * _.isWeakSet(new WeakSet);
+ * // => true
+ *
+ * _.isWeakSet(new Set);
+ * // => false
+ */
+function isWeakSet(value) {
+  return isObjectLike(value) && objectToString.call(value) == weakSetTag;
+}
+
+export default isWeakSet;
diff --git a/lang.default.js b/lang.default.js
index b72c6c85b..b76e7b81e 100644
--- a/lang.default.js
+++ b/lang.default.js
@@ -7,9 +7,11 @@ import gt from './gt';
 import gte from './gte';
 import isArguments from './isArguments';
 import isArray from './isArray';
+import isArrayBuffer from './isArrayBuffer';
 import isArrayLike from './isArrayLike';
 import isArrayLikeObject from './isArrayLikeObject';
 import isBoolean from './isBoolean';
+import isBuffer from './isBuffer';
 import isDate from './isDate';
 import isElement from './isElement';
 import isEmpty from './isEmpty';
@@ -20,6 +22,7 @@ import isFinite from './isFinite';
 import isFunction from './isFunction';
 import isInteger from './isInteger';
 import isLength from './isLength';
+import isMap from './isMap';
 import isMatch from './isMatch';
 import isMatchWith from './isMatchWith';
 import isNaN from './isNaN';
@@ -32,10 +35,13 @@ import isObjectLike from './isObjectLike';
 import isPlainObject from './isPlainObject';
 import isRegExp from './isRegExp';
 import isSafeInteger from './isSafeInteger';
+import isSet from './isSet';
 import isString from './isString';
 import isSymbol from './isSymbol';
 import isTypedArray from './isTypedArray';
 import isUndefined from './isUndefined';
+import isWeakMap from './isWeakMap';
+import isWeakSet from './isWeakSet';
 import lt from './lt';
 import lte from './lte';
 import toArray from './toArray';
@@ -48,13 +54,14 @@ import toString from './toString';
 
 export default {
   clone, cloneDeep, cloneDeepWith, cloneWith, eq,
-  gt, gte, isArguments, isArray, isArrayLike,
-  isArrayLikeObject, isBoolean, isDate, isElement, isEmpty,
-  isEqual, isEqualWith, isError, isFinite, isFunction,
-  isInteger, isLength, isMatch, isMatchWith, isNaN,
-  isNative, isNil, isNull, isNumber, isObject,
-  isObjectLike, isPlainObject, isRegExp, isSafeInteger, isString,
-  isSymbol, isTypedArray, isUndefined, lt, lte,
-  toArray, toInteger, toLength, toNumber, toPlainObject,
-  toSafeInteger, toString
+  gt, gte, isArguments, isArray, 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, isSymbol,
+  isTypedArray, isUndefined, isWeakMap, isWeakSet, lt,
+  lte, toArray, toInteger, toLength, toNumber,
+  toPlainObject, toSafeInteger, toString
 };
diff --git a/lang.js b/lang.js
index 5295b18d0..2fb3db6d9 100644
--- a/lang.js
+++ b/lang.js
@@ -7,9 +7,11 @@ export { default as gt } from './gt';
 export { default as gte } from './gte';
 export { default as isArguments } from './isArguments';
 export { default as isArray } from './isArray';
+export { default as isArrayBuffer } from './isArrayBuffer';
 export { default as isArrayLike } from './isArrayLike';
 export { default as isArrayLikeObject } from './isArrayLikeObject';
 export { default as isBoolean } from './isBoolean';
+export { default as isBuffer } from './isBuffer';
 export { default as isDate } from './isDate';
 export { default as isElement } from './isElement';
 export { default as isEmpty } from './isEmpty';
@@ -20,6 +22,7 @@ export { default as isFinite } from './isFinite';
 export { default as isFunction } from './isFunction';
 export { default as isInteger } from './isInteger';
 export { default as isLength } from './isLength';
+export { default as isMap } from './isMap';
 export { default as isMatch } from './isMatch';
 export { default as isMatchWith } from './isMatchWith';
 export { default as isNaN } from './isNaN';
@@ -32,10 +35,13 @@ export { default as isObjectLike } from './isObjectLike';
 export { default as isPlainObject } from './isPlainObject';
 export { default as isRegExp } from './isRegExp';
 export { default as isSafeInteger } from './isSafeInteger';
+export { default as isSet } from './isSet';
 export { default as isString } from './isString';
 export { default as isSymbol } from './isSymbol';
 export { default as isTypedArray } from './isTypedArray';
 export { default as isUndefined } from './isUndefined';
+export { default as isWeakMap } from './isWeakMap';
+export { default as isWeakSet } from './isWeakSet';
 export { default as lt } from './lt';
 export { default as lte } from './lte';
 export { default as toArray } from './toArray';
diff --git a/lodash.default.js b/lodash.default.js
index 272dc66eb..a8ca95744 100644
--- a/lodash.default.js
+++ b/lodash.default.js
@@ -1,6 +1,6 @@
 /**
  * @license
- * lodash 4.2.1 (Custom Build) <https://lodash.com/>
+ * lodash 4.3.0 (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="es" -o ./`
  * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
@@ -44,7 +44,7 @@ import toInteger from './toInteger';
 import lodash from './wrapperLodash';
 
 /** Used as the semantic version number. */
-var VERSION = '4.2.1';
+var VERSION = '4.3.0';
 
 /** Used to compose bitmasks for wrapper metadata. */
 var BIND_KEY_FLAG = 2;
@@ -282,9 +282,11 @@ lodash.inRange = number.inRange;
 lodash.invoke = object.invoke;
 lodash.isArguments = lang.isArguments;
 lodash.isArray = isArray;
+lodash.isArrayBuffer = lang.isArrayBuffer;
 lodash.isArrayLike = lang.isArrayLike;
 lodash.isArrayLikeObject = lang.isArrayLikeObject;
 lodash.isBoolean = lang.isBoolean;
+lodash.isBuffer = lang.isBuffer;
 lodash.isDate = lang.isDate;
 lodash.isElement = lang.isElement;
 lodash.isEmpty = lang.isEmpty;
@@ -295,6 +297,7 @@ lodash.isFinite = lang.isFinite;
 lodash.isFunction = lang.isFunction;
 lodash.isInteger = lang.isInteger;
 lodash.isLength = lang.isLength;
+lodash.isMap = lang.isMap;
 lodash.isMatch = lang.isMatch;
 lodash.isMatchWith = lang.isMatchWith;
 lodash.isNaN = lang.isNaN;
@@ -307,10 +310,13 @@ lodash.isObjectLike = lang.isObjectLike;
 lodash.isPlainObject = lang.isPlainObject;
 lodash.isRegExp = lang.isRegExp;
 lodash.isSafeInteger = lang.isSafeInteger;
+lodash.isSet = lang.isSet;
 lodash.isString = lang.isString;
 lodash.isSymbol = lang.isSymbol;
 lodash.isTypedArray = lang.isTypedArray;
 lodash.isUndefined = lang.isUndefined;
+lodash.isWeakMap = lang.isWeakMap;
+lodash.isWeakSet = lang.isWeakSet;
 lodash.join = array.join;
 lodash.kebabCase = string.kebabCase;
 lodash.last = last;
diff --git a/lodash.js b/lodash.js
index fd9ffafc8..36ead17df 100644
--- a/lodash.js
+++ b/lodash.js
@@ -1,6 +1,6 @@
 /**
  * @license
- * lodash 4.2.1 (Custom Build) <https://lodash.com/>
+ * lodash 4.3.0 (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="es" -o ./`
  * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
@@ -107,9 +107,11 @@ export { default as invoke } from './invoke';
 export { default as invokeMap } from './invokeMap';
 export { default as isArguments } from './isArguments';
 export { default as isArray } from './isArray';
+export { default as isArrayBuffer } from './isArrayBuffer';
 export { default as isArrayLike } from './isArrayLike';
 export { default as isArrayLikeObject } from './isArrayLikeObject';
 export { default as isBoolean } from './isBoolean';
+export { default as isBuffer } from './isBuffer';
 export { default as isDate } from './isDate';
 export { default as isElement } from './isElement';
 export { default as isEmpty } from './isEmpty';
@@ -120,6 +122,7 @@ export { default as isFinite } from './isFinite';
 export { default as isFunction } from './isFunction';
 export { default as isInteger } from './isInteger';
 export { default as isLength } from './isLength';
+export { default as isMap } from './isMap';
 export { default as isMatch } from './isMatch';
 export { default as isMatchWith } from './isMatchWith';
 export { default as isNaN } from './isNaN';
@@ -132,10 +135,13 @@ export { default as isObjectLike } from './isObjectLike';
 export { default as isPlainObject } from './isPlainObject';
 export { default as isRegExp } from './isRegExp';
 export { default as isSafeInteger } from './isSafeInteger';
+export { default as isSet } from './isSet';
 export { default as isString } from './isString';
 export { default as isSymbol } from './isSymbol';
 export { default as isTypedArray } from './isTypedArray';
 export { default as isUndefined } from './isUndefined';
+export { default as isWeakMap } from './isWeakMap';
+export { default as isWeakSet } from './isWeakSet';
 export { default as iteratee } from './iteratee';
 export { default as join } from './join';
 export { default as kebabCase } from './kebabCase';
diff --git a/package.json b/package.json
index e283a8b38..a1baa7ff8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash-es",
-  "version": "4.2.1",
+  "version": "4.3.0",
   "description": "Lodash exported as ES modules.",
   "homepage": "https://lodash.com/custom-builds",
   "license": "MIT",
diff --git a/partial.js b/partial.js
index c41ca450f..1fcbf12b5 100644
--- a/partial.js
+++ b/partial.js
@@ -44,4 +44,7 @@ var partial = rest(function(func, partials) {
   return createWrapper(func, PARTIAL_FLAG, undefined, partials, holders);
 });
 
+// Assign default placeholders.
+partial.placeholder = {};
+
 export default partial;
diff --git a/partialRight.js b/partialRight.js
index 8eb9786b9..d1c0b1295 100644
--- a/partialRight.js
+++ b/partialRight.js
@@ -43,4 +43,7 @@ var partialRight = rest(function(func, partials) {
   return createWrapper(func, PARTIAL_RIGHT_FLAG, undefined, partials, holders);
 });
 
+// Assign default placeholders.
+partialRight.placeholder = {};
+
 export default partialRight;
diff --git a/pull.js b/pull.js
index 7cf423453..d8adc2b88 100644
--- a/pull.js
+++ b/pull.js
@@ -2,7 +2,7 @@ import pullAll from './pullAll';
 import rest from './rest';
 
 /**
- * Removes all provided values from `array` using
+ * Removes all given values from `array` using
  * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
  * for equality comparisons.
  *
diff --git a/reduce.js b/reduce.js
index 84f30363c..30d6c7fa0 100644
--- a/reduce.js
+++ b/reduce.js
@@ -8,7 +8,7 @@ import isArray from './isArray';
  * Reduces `collection` to a value which is the accumulated result of running
  * each element in `collection` through `iteratee`, where each successive
  * invocation is supplied the return value of the previous. If `accumulator`
- * is not provided the first element of `collection` is used as the initial
+ * is not given the first element of `collection` is used as the initial
  * value. The iteratee is invoked with four arguments:
  * (accumulator, value, index|key, collection).
  *
diff --git a/subtract.js b/subtract.js
index 1ed16fdcd..deff9970c 100644
--- a/subtract.js
+++ b/subtract.js
@@ -14,6 +14,9 @@
  */
 function subtract(minuend, subtrahend) {
   var result;
+  if (minuend === undefined && subtrahend === undefined) {
+    return 0;
+  }
   if (minuend !== undefined) {
     result = minuend;
   }
diff --git a/template.js b/template.js
index a15aeb21e..2bc780322 100644
--- a/template.js
+++ b/template.js
@@ -29,7 +29,7 @@ var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
  * in "interpolate" delimiters, HTML-escape interpolated data properties in
  * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
  * properties may be accessed as free variables in the template. If a setting
- * object is provided it takes precedence over `_.templateSettings` values.
+ * object is given it takes precedence over `_.templateSettings` values.
  *
  * **Note:** In the development build `_.template` utilizes
  * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
diff --git a/union.js b/union.js
index 69083f383..6d7a7ed84 100644
--- a/union.js
+++ b/union.js
@@ -3,8 +3,8 @@ import baseUniq from './_baseUniq';
 import rest from './rest';
 
 /**
- * Creates an array of unique values, in order, from all of the provided arrays
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * Creates an array of unique values, in order, from all given arrays using
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
  * for equality comparisons.
  *
  * @static
diff --git a/uniqueId.js b/uniqueId.js
index e416f971b..71fd2cfe4 100644
--- a/uniqueId.js
+++ b/uniqueId.js
@@ -4,7 +4,7 @@ import toString from './toString';
 var idCounter = 0;
 
 /**
- * Generates a unique ID. If `prefix` is provided the ID is appended to it.
+ * Generates a unique ID. If `prefix` is given the ID is appended to it.
  *
  * @static
  * @memberOf _
diff --git a/without.js b/without.js
index 8ec326c06..d59a29989 100644
--- a/without.js
+++ b/without.js
@@ -3,7 +3,7 @@ import isArrayLikeObject from './isArrayLikeObject';
 import rest from './rest';
 
 /**
- * Creates an array excluding all provided values using
+ * Creates an array excluding all given values using
  * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
  * for equality comparisons.
  *
diff --git a/xor.js b/xor.js
index aa1bb692e..0a5b97458 100644
--- a/xor.js
+++ b/xor.js
@@ -5,7 +5,7 @@ import rest from './rest';
 
 /**
  * Creates an array of unique values that is the [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
- * of the provided arrays.
+ * of the given arrays.
  *
  * @static
  * @memberOf _