title: angular disable button when array empty
body: <p>Maybe I'm just not thinking straight. Can I enable/disable a link via my controller using some form of angular ng-click and ng-disabled?</p>
  
  <p><a href="http://jsfiddle.net/dxquye40/3/" rel="nofollow">Fiddle here</a></p>
  
  <pre><code>see fiddle...
  </code></pre>
  
  <p>The 'Do stuff to things' button should not be enabled unless at least one 'thing' is checked, and no action should be taken either. Of course, once a Thing IS checked, the button should activate.</p>
  
  <p>The more I try to fix this, the more complicated it gets, and I can't help but think I'm overlooking something obvious.</p>