title: unable to hide div in angular js using ng-if
body: <p>unable to hide div on loading page.
  I want to show the div if the value of array is empty.</p>
  
  <pre><code>    &lt;div ng-hide="loading"  ng-if="users== null || users.length === 0" &gt;
          &lt;h3&gt;No Result Found&lt;/h3&gt;
      &lt;/div&gt;
  </code></pre>