
<p>For example: <code>(name, age) in {&#39;adam&#39;:10, &#39;amalie&#39;:12}</code>.</p>
</li>
<li><p><code>variable in expression track by tracking_expression</code> – You can also provide an optional tracking function
which can be used to associate the objects in the collection with the DOM elements. If no tracking function
is specified the ng-repeat associates elements by identity in the collection. It is an error to have
more than one tracking function to resolve to the same key. (This would mean th