title: Unknown provider: uniqueFilterProvider using unique filter in Angular.js
body: <p>I am new to AngularJS. I am trying to implement filtering to build a unique list of options for the select box. My code is as follows</p>
  
  <pre><code>&lt;select name="show-filter" id="show-filter" ng-model="card" ng-options="v for v in currentOptions.cards  | unique:'cardno'"&gt;
  &lt;option value=""&gt;All&lt;/option&gt;
  &lt;/select&gt;   
  </code></pre>
  
  <p>I am getting the following error</p>
  
  <blockquote>
    <p>Error: Unknown provider: uniqueFilterProvider &lt;- uniqueFilter</p>
  </blockquote>
  
  <p>sample JSON (wrapped into <code>$scope.currentOptions</code>)</p>
  
  <pre><code>"cards ":[{"cardno":"123223333"},{"cardno":"123223333"},{"cardno":"123223333"}]}
  </code></pre>