title: Are complex expressions possible in ng-hide / ng-show?
body: <p>I want to do so:</p>
  
  <pre><code>ng-hide="!globals.isAdmin &amp;&amp; mapping.is_default"
  </code></pre>
  
  <p>but the expression evaluates always to <code>false</code>.</p>
  
  <p>I do not want to define special function on <code>$scope</code>.</p>