title: Sorting by date with underscore.js or just plain JS
body: <p>I have an array of objects that have a 'date' string property.
  ie:</p>
  
  <pre><code>[
      {
          id: 1,
          startDate: '2011-4-22'
      },
      {
          id: 2,
          startDate: '2012-3-15'
      },
      {
          id: 3,
          startDate: '2011-4-22'
      },
      {
          id: 4,
          startDate: '2012-2-10'
      }
  ]
  </code></pre>
  
  <p>I  just want to convert the date strings to a date and sort them by startDate DESC. Can someone please tell me how to do this with teh underscore.js _sortBy method or even just plain javascript will do.</p>
  
  <p>Thanks!</p>