title: Twig : Unset element from array
body: <p>I have an array of elements composed of key => value for example:</p>
  
  <p><code>arr = { 156 : 'one', 99 : 'tow' }</code></p>
  
  <p>I want to remove an element from the array depending on the key. Like doing unset() in php ? Is it possible ?</p>