title: How to do a checking/condition after ng-change in a dropdown
body: <p>I have the following drop-down button</p>
  
  <pre><code>&lt;select class="input-block-level" ng-model="final_select"
                                  ng-options="l.id as l.name group by l.group for l in final_selections['objects']"&gt;
                          &lt;/select&gt;
  </code></pre>
  
  <ul>
  <li>Data type of final_selections['objects'] = list of dictionary</li>
  <li>example of one object: <code>final_selections['objects'][0] = {"id":"A","name":"A: assigned-already","group":"Assign"}</code></li>
  </ul>
  
  <p>How can I print a string like "selected A" below the dropdown, once the object A selected? means ng-change triggered and the value A selected then show the message.</p>