title: how to select value in UI select value?
body: <p>could you please tell me how to select value in UI-select value ?</p>
  
  <p>Actually when user select any name I want to select <strong>age</strong> of item .Here is my code
  <a href="http://plnkr.co/edit/InxOyQRjrlrDJtx2VuzI?p=preview" rel="nofollow">http://plnkr.co/edit/InxOyQRjrlrDJtx2VuzI?p=preview</a></p>
  
  <pre><code>&lt;ui-select tagging tagging-label="new tag" multiple ng-model="multipleDemo" theme="select2" ng-disabled="disabled" style="width: 300px;"&gt;
      &lt;ui-select-match placeholder="Select colors..."&gt;{{$item.name}}&lt;/ui-select-match&gt;
      &lt;ui-select-choices repeat="color in people | filter:$select.search"&gt;
        {{color.name}}
      &lt;/ui-select-choices&gt;
    &lt;/ui-select&gt;
  </code></pre>
  
  <p>Example </p>
  
  <p>when I select <strong>Amalie</strong>  <strong>multipleDemo</strong> model value is <strong>12</strong> 
  or if I select <strong>Wladimir</strong> is model value "30"..
  it is multiple selected so model should be array ..</p>
  
  <p>can we do this ?</p>