ngRepeat:dupes error when iterating over duplicate keys in AngularJS
Problem: ngRepeat:dupes error when rendering duplicate items AngularJS 1.x throws the ngRepeat:dupes error when an ng-repeat directive encounters two or more items that produce the same tracking value. By default, the tracking value is the item itself, so primitive duplicates or identical objects trigger the error. To avoid the error, a track by expression m