title: Set Default option from Angular Filter
body: <p>I have a select list which is being generated with a filter:</p>
  
  <pre><code>&lt;select ng-model="item.SAC"&gt;
      &lt;option ng-repeat="code in SACCodes | filter:{group: item.SACGroup}" value="{{code.code}}"&gt;{{code.code}} - {{code.description}} - {{code.group}}&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>When <code>item.SACGroup</code> changes I want to automatically select the first valid option (so that the select box never turns blank).</p>
  
  <pre><code>$scope.SACCodes = [
  {'code':'034', 'description':'FTG Support Steel', 'group':'footings'},
  {'code':'037', 'description':'Masonry Wall FTGs', 'group':'footings'},
  {'code':'032', 'description':'S.O.G. Rebar', 'group':'slabs'},
  {'code':'033', 'description':'S.O.G. (DBL.Mat)', 'group':'slabs'}
  ];
  </code></pre>