Ignore $$hashKey in shallowEqual, fix #23

Author: wbuchwalter

src/utils/shallowEqual.js

@@ -3,8 +3,9 @@
      return true;
    }
 
-   var keysA = Object.keys(objA);
-   var keysB = Object.keys(objB);
+   /* $$hashKey is added by angular when using ng-repeat, we ignore that*/
+   var keysA = Object.keys(objA).filter(k => k !== '$$hashKey');
+   var keysB = Object.keys(objB).filter(k => k !== '$$hashKey');
 
    if (keysA.length !== keysB.length) {
      return false;

test/utils/shallowEqual.spec.js

@@ -53,5 +53,14 @@ describe('Utils', () => {
         )
       ).toBe(false);
     });
+
+    it('Should ignore $$hashKey property if present', () => {
+      expect(
+        shallowEqual(
+          { a: 1, b: 2, c: undefined, $$hashKey: 1 },
+          { a: 1, b: 2, c: undefined }
+        )
+      ).toBe(true);
+    });
   });
 });