title: angularjs simple conditional
body: <p>I know I can use ng-if to do conditionals like this:</p>
  
  <pre><code>  td.icon(ng-if="isAuthor()", colspan="2")
    td.icon(ng-if="!isAuthor()", colspan="3")
  </code></pre>
  
  <p>But it seems a bit over-wordy for something simple. Is there a way to do:</p>
  
  <pre><code>  td.icon(ng-if="!isAuthor()", colspan="{{if isAuthor(): 2 else 3}}")
  </code></pre>