Merge pull request #12 from paulpflug/master

Bugfix for #10, #12

Author: Phillip Clark

index.js

@@ -67,34 +67,6 @@
   }
   inherits(DiffArray, Diff);
 
-  function checkForDiff(object) {
-    if (object && object.kind && object.path){
-      switch(object.kind) {
-        case 'A':
-          if (object.hasOwnProperty('index') && object.hasOwnProperty('item')){
-            return true;
-          }
-          break;
-        case 'D':
-          if (object.hasOwnProperty('lhs')){
-            return true;
-          }
-          break;
-        case 'E':
-          if (object.hasOwnProperty('lhs') && object.hasOwnProperty('rhs')){
-            return true;
-          }
-          break;
-        case 'N':
-          if (object.hasOwnProperty('rhs')){
-            return true;
-          }
-          break;
-      }
-    }
-    return false;
-  }
-
   function arrayRemove(arr, from, to) {
   	var rest = arr.slice((to || from) + 1 || arr.length);
   	arr.length = from < 0 ? arr.length + from : from;
@@ -217,8 +189,8 @@
 	}
 
 	function applyChange(target, source, change) {
-		if (!checkForDiff(change)) {
-			throw new TypeError('[Object] Required properties on change are missing');
+		if (!(change instanceof Diff)) {
+			throw new TypeError('[Object] change must be instanceof Diff');
 		}
 		if (target && source && change) {
 			var it = target, i, u;