perf(ngClass): improve even-odd checking

marijaselakovic · Narretz · commit 4ae4cc9d469f · 2016-05-23T23:33:04.000+02:00
This now uses the same technique as ngRepeat.
diff --git a/src/ng/directive/ngClass.js b/src/ng/directive/ngClass.js
@@ -69,7 +69,9 @@ function classDirective(name, selector) {
         }
 
         function ngClassWatchAction(newVal) {
-          if (selector === true || scope.$index % 2 === selector) {
+          // jshint bitwise: false
+          if (selector === true || (scope.$index & 1) === selector) {
+          // jshint bitwise: true
             var newClasses = arrayClasses(newVal || []);
             if (!oldVal) {
               addClasses(newClasses);
