title: how to return nothing ( empty array) with array.map function
body: <p>Right now, if 'Everything' in the list is detected, the output becomes [""].<br>
  Expected output: []</p>
  
  <pre><code>Copy.names = rule.names.map(function(x) {                                
      if (x.name ==='Everything') {                                   
          return '';
      } else {
          return x.name;
      }
  });
  </code></pre>