title: Sort array according to boolean property
body: <p>I'm having an array of objects. Every objects has a property <code>isUser: Bool</code>. So now I want to sort that array that the objects with the <code>isUser == true</code> are first in the array and then the objects with <code>isUser == false</code>.</p>
  
  <p>Do I need to filter for both <code>true</code> and <code>false</code> and then concatenate the two arrays or can this be done simpler?</p>