title: Spliting array with complex regex including empty string
body: <p>I have a string like <code>'123,45,6,7'</code> and want to split it on separate digit: <code>[1, 2, 3, 4, 5, 6, 7]</code></p>
  
  <p>I know there is a way to split string by complex regex like this:</p>
  
  <p><code>'1 2 3,4a5,6,7'.split(/[^\d]/)</code> -> <code>[1,2,3,4,5,6,7]</code>.</p>
  
  <p>Is there way to split this string by regex, something like:</p>
  
  <p><code>'123,45,6,7'.split(/[^\d]|empty string/)</code>?</p>