Bump to v3.7.0.

internal/createAssigner.js

@@ -1,5 +1,6 @@
 import bindCallback from './bindCallback';
 import isIterateeCall from './isIterateeCall';
+import restParam from '../function/restParam';
 
 /**
  * Creates a function that assigns properties of source object(s) to a given
@@ -12,38 +13,32 @@ import isIterateeCall from './isIterateeCall';
  * @returns {Function} Returns the new assigner function.
  */
 function createAssigner(assigner) {
-  return function() {
-    var args = arguments,
-        length = args.length,
-        object = args[0];
+  return restParam(function(object, sources) {
+    var index = -1,
+        length = object == null ? 0 : sources.length,
+        customizer = length > 2 && sources[length - 2],
+        guard = length > 2 && sources[2],
+        thisArg = length > 1 && sources[length - 1];
 
-    if (length < 2 || object == null) {
-      return object;
-    }
-    var customizer = args[length - 2],
-        thisArg = args[length - 1],
-        guard = args[3];
-
-    if (length > 3 && typeof customizer == 'function') {
+    if (typeof customizer == 'function') {
       customizer = bindCallback(customizer, thisArg, 5);
       length -= 2;
     } else {
-      customizer = (length > 2 && typeof thisArg == 'function') ? thisArg : null;
+      customizer = typeof thisArg == 'function' ? thisArg : null;
       length -= (customizer ? 1 : 0);
     }
-    if (guard && isIterateeCall(args[1], args[2], guard)) {
-      customizer = length == 3 ? null : customizer;
-      length = 2;
+    if (guard && isIterateeCall(sources[0], sources[1], guard)) {
+      customizer = length < 3 ? null : customizer;
+      length = 1;
     }
-    var index = 0;
     while (++index < length) {
-      var source = args[index];
+      var source = sources[index];
       if (source) {
         assigner(object, source, customizer);
       }
     }
     return object;
-  };
+  });
 }
 
 export default createAssigner;