title: How to split up an array into a multi-dimensional array
body: <p>I have this array: </p>
  
  <pre><code>parsed_data = ["Mike Henry,7/7/87,Oakland,831 123-2758", "David Jordan,12/30/92,Bangkok,831 229-1234", "Matt Rosen,5/21/89,Seattle,925 518-9933"]
  </code></pre>
  
  <p>I would like to convert it to:</p>
  
  <pre><code>[["Mike Henry", "7/7/87", "Oakland", "831 123-2758"],["David Jordan", "12/30/92", "Bangkok", "831 229-1234"],["Matt Rosen", "5/21/89", "Seattle", "925 518-9933"]]
  </code></pre>
  
  <p>I have tried </p>
  
  <pre><code>parsed_data = parsed_data.each do |file|
    file.split(",")
  end
  </code></pre>
  
  <p>but it returns my original array.  Any help is greatly appreciated!</p>