title: json iteration in jquery
body: <p>I have this json</p>
  
  <pre><code>{
      "3": {
          "builderName": "All Branches",
          "currentStep": {
              "eta": 46.228333592710214,
              "expectations": [
                  [
                      "output",
                      1519065,
                      1565397.0
                  ]
              ],
  </code></pre>
  
  <p>I want to get keys and values from currentStep. Like eta and expectations. </p>
  
  <pre><code>$.each(obj, function (key, value) {
      $.each(value.currentStep, function (key, value) {
         console.log(value.eta); // this returns undefined            
      });
  });
  </code></pre>