title: Iterate through dynamic JSON keys
body: <p>Using:</p>
  
  <pre><code>JSON.parse(response.read_body)
  </code></pre>
  
  <p>Returned this hash:</p>
  
  <pre><code>{
      "stats": {
          "2012-10-31": 2637, 
          "2012-10-30": 2873, 
          "2012-12-14": 2894, 
          "2012-12-08": 2906, 
          "2012-12-09": 3357, 
          "2012-11-30": 4959
      }
  }
  </code></pre>
  
  <p>The problem is that the Date keys can be any date value.</p>
  
  <p>I want the sum of all values.</p>