title: Separate arrayof obj in others sequentially
body: <p>Trying to do a method to re-arrange an array to print in columns:</p>
  
  <pre><code>I have:
  a = [1, 2, 3, 4, 5, 6, 7, 8, 9];
  
  I need to have:
  b = [1, 4, 7];
  c = [2, 5, 8];
  d = [3, 6, 9];
  ...
  </code></pre>
  
  <p>where numbers of others colums(b, c, d) could be variable.</p>