fix(angular.equals): consistently compare undefined object props

previously:

a = {};
b = {x:undefined};
angular.equals(a, b) == angular.equals(b, a) // returns false.

both should return false because these objects are not equal.

unlike in implemented in #1695 the comparison should be stricter
and return false not true. if we need to relax this in the future
we can always do so.

Closes #1648

1 files changed, 12 insertions, 5 deletions

diff --git a/src/Angular.js b/src/Angular.js
index 3a11f3ea..21b3ef07 100644
--- a/src/Angular.js
+++ b/src/Angular.js
@@ -620,16 +620,23 @@ function equals(o1, o2) {
       } else {
         if (isScope(o1) || isScope(o2) || isWindow(o1) || isWindow(o2)) return false;
         keySet = {};
+        length = 0;
         for(key in o1) {
-          if (key.charAt(0) !== '$' && !isFunction(o1[key]) && !equals(o1[key], o2[key])) {
-            return false;
-          }
+          if (key.charAt(0) === '$') continue;
+
+          if (!isFunction(o1[key]) && !equals(o1[key], o2[key])) return false;
+
+          length++;
           keySet[key] = true;
         }
         for(key in o2) {
-          if (!keySet[key] && key.charAt(0) !== '$' && !isFunction(o2[key])) return false;
+          if (key.charAt(0) === '$') {
+            continue;
+          }
+          if (!keySet[key] && !isFunction(o2[key])) return false;
+          length--;
         }
-        return true;
+        return length === 0;
       }
     }
   }