title: Filter an array in order to group items by data type
body: <p>I got this:</p>
  
  <pre><code>var arr= ["three", "2", "five", "ten", "111", 1, 2, "forty", "33", 33];
  </code></pre>
  
  <p>I need it to be 2 new arrays
  One with just the numbers, and the other with just the strings</p>
  
  <p>Like this:</p>
  
  <pre><code>var strArr = ["three", "2", "five", "ten", "111","forty", "33"];
  var numArr = [1, 2, 33];
  </code></pre>
  
  <p>How should I do it?</p>