Bump to v3.3.0.

internal/LazyWrapper.js

@@ -1,3 +1,6 @@
+import baseCreate from './baseCreate';
+import baseLodash from './baseLodash';
+
 /** Used as references for `-Infinity` and `Infinity`. */
 var POSITIVE_INFINITY = Number.POSITIVE_INFINITY;
 
@@ -18,4 +21,7 @@ function LazyWrapper(value) {
   this.__views__ = null;
 }
 
+LazyWrapper.prototype = baseCreate(baseLodash.prototype);
+LazyWrapper.prototype.constructor = LazyWrapper;
+
 export default LazyWrapper;

internal/LodashWrapper.js

@@ -1,3 +1,6 @@
+import baseCreate from './baseCreate';
+import baseLodash from './baseLodash';
+
 /**
  * The base constructor for creating `lodash` wrapper objects.
  *
@@ -12,4 +15,7 @@ function LodashWrapper(value, chainAll, actions) {
   this.__chain__ = !!chainAll;
 }
 
+LodashWrapper.prototype = baseCreate(baseLodash.prototype);
+LodashWrapper.prototype.constructor = LodashWrapper;
+
 export default LodashWrapper;

internal/baseIsFunction.js

@@ -0,0 +1,15 @@
+/**
+ * The base implementation of `_.isFunction` without support for environments
+ * with incorrect `typeof` results.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ */
+function baseIsFunction(value) {
+  // Avoid a Chakra JIT bug in compatibility modes of IE 11.
+  // See https://github.com/jashkenas/underscore/issues/1621 for more details.
+  return typeof value == 'function' || false;
+}
+
+export default baseIsFunction;

internal/baseLodash.js

@@ -0,0 +1,10 @@
+/**
+ * The function whose prototype all chaining wrappers inherit from.
+ *
+ * @private
+ */
+function baseLodash() {
+  // No operation performed.
+}
+
+export default baseLodash;

internal/baseMerge.js

@@ -3,6 +3,7 @@ import baseForOwn from './baseForOwn';
 import baseMergeDeep from './baseMergeDeep';
 import isArray from '../lang/isArray';
 import isLength from './isLength';
+import isObject from '../lang/isObject';
 import isObjectLike from './isObjectLike';
 import isTypedArray from '../lang/isTypedArray';
 
@@ -19,8 +20,10 @@ import isTypedArray from '../lang/isTypedArray';
  * @returns {Object} Returns the destination object.
  */
 function baseMerge(object, source, customizer, stackA, stackB) {
+  if (!isObject(object)) {
+    return object;
+  }
   var isSrcArr = isLength(source.length) && (isArray(source) || isTypedArray(source));
-
   (isSrcArr ? arrayEach : baseForOwn)(source, function(srcValue, key, source) {
     if (isObjectLike(srcValue)) {
       stackA || (stackA = []);

internal/isIterateeCall.js

@@ -22,7 +22,8 @@ function isIterateeCall(value, index, object) {
   } else {
     prereq = type == 'string' && index in object;
   }
-  return prereq && object[index] === value;
+  var other = object[index];
+  return prereq && (value === value ? value === other : other !== other);
 }
 
 export default isIterateeCall;