title: Angularjs filter not null
body: <p>Trying to filter out items with a certain property that is not null So for:</p>
  
  <pre><code>var details = [{name:'Bill', shortDescription: null}, {name:'Sally', shortDescription: 'A girl'}]
  </code></pre>
  
  <p>I would like to only show one li; the one for sally. This is what I have tried with no success</p>
  
  <pre><code>&lt;ul&gt;
  &lt;li ng-repeat="detail in details | filter:{shortDescription:'!'}"&gt;
  &lt;p&gt;{{detail.shortDescription}}&lt;/p&gt;
  &lt;/li&gt;
  &lt;/ul&gt;
  </code></pre>
  
  <p>Any idea how I can do this without creating a custom filter? Or even so, what the custom filter would look like?</p>