title: Restructuring a nested collection of arrays
body: <p>I have an array of arrays, where each inner array contains three items: A postcode, a street name and an array of dates [for garbage collection].</p>
  
  <p>The user will provide their postcode and house number, and the appropriate information needs to be displayed to them. There's also a need to be able to add dates to each 'collection array' after carrying out checks.</p>
  
  <p>This is the code I have, but the data seems badly structured. How could it be improved?</p>
  
  <pre><code>var postcodes = [
          ["BT161JR18", "Londonderry Park", [collectionArrayBT161JR18]], 
          ["BT161JR19",  "Ballyregan Cresent",  [collectionArrayBT161JR19]],
          ["BT161JR11", "Ballyregan Road",  [collectionArrayBT161JR11]],
      ]   ; 
  
  var collectionArrayBT161JR18 = ["16/05/14", "18/06/14", "19/07/14"];
  var collectionArrayBT161JR19 = ["17/05/14", "11/06/14"];
  var collectionArrayBT161JR11 = ["14/05/14", "20/06/14"];
  </code></pre>