title: How to check if any Checkbox is checked in Angular
body: <p>Is there any function or ng-<em>something</em> to check if any of the displayed Checkboxes are checked?</p>
  
  <p>I have the values through the <strong>ng-click="function()"</strong> and pass the values through. I can go by foot and check my array if any value is inside.</p>
  
  <blockquote>
    <p>I want to activate/deactivate the "next"-button if any Checkbox is
    checked.</p>
  </blockquote>
  
  <p>What's the easiest way?</p>