Bump to v4.1.0.

_createAssigner.js

@@ -0,0 +1,37 @@
+define(['./_isIterateeCall', './rest'], function(isIterateeCall, rest) {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /**
+   * Creates a function like `_.assign`.
+   *
+   * @private
+   * @param {Function} assigner The function to assign values.
+   * @returns {Function} Returns the new assigner function.
+   */
+  function createAssigner(assigner) {
+    return rest(function(object, sources) {
+      var index = -1,
+          length = sources.length,
+          customizer = length > 1 ? sources[length - 1] : undefined,
+          guard = length > 2 ? sources[2] : undefined;
+
+      customizer = typeof customizer == 'function' ? (length--, customizer) : undefined;
+      if (guard && isIterateeCall(sources[0], sources[1], guard)) {
+        customizer = length < 3 ? undefined : customizer;
+        length = 1;
+      }
+      object = Object(object);
+      while (++index < length) {
+        var source = sources[index];
+        if (source) {
+          assigner(object, source, index, customizer);
+        }
+      }
+      return object;
+    });
+  }
+
+  return createAssigner;
+});