extend size() to take ownPropsOnly param

- extend size() to take size(obj, ownPropsOnly)
- add specs for size()
- update docs to mention string support
- use size() in ng:repeat

including the hasOwnProp check for all object doesn't create
significant perf penalty:
http://jsperf.com/dedicated-code-branch-for-hasownprop

1 files changed, 1 insertions, 10 deletions

diff --git a/src/widgets.js b/src/widgets.js
index a5a8ee79..a7d59289 100644
--- a/src/widgets.js
+++ b/src/widgets.js
@@ -913,19 +913,10 @@ angularWidget('@ng:repeat', function(expression, element){
           childCount = children.length,
           lastIterElement = iterStartElement,
           collection = this.$tryEval(rhs, iterStartElement),
-          is_array = isArray(collection),
-          collectionLength = 0,
+          collectionLength = size(collection, true),
           childScope,
           key;
 
-      if (is_array) {
-        collectionLength = collection.length;
-      } else {
-        for (key in collection)
-          if (collection.hasOwnProperty(key))
-            collectionLength++;
-      }
-
       for (key in collection) {
         if (collection.hasOwnProperty(key)) {
           if (index < childCount) {