title: Swift 2 - Separating an array into a dictionary with keys from A to Z
body: <p>I have an array, for instance <code>["Apple", "Banana", "Blueberry", "Eggplant"]</code> and I would like to convert it to a dictionary like follows:</p>
  
  <pre><code>[
      "A" : ["Apple"],
      "B" : ["Banana", "Blueberry"],
      "C" : [],
      "D" : [],
      "E" : ["Eggplant"]
  ]
  </code></pre>
  
  <p>I am using Swift 2 on Xcode 7 beta 4. Thanks!</p>