title: populate observable array from json
body: <p>I have a working test example of what I want to do here: <a href="http://jsfiddle.net/2BxVk/6/" rel="nofollow">http://jsfiddle.net/2BxVk/6/</a></p>
  
  <p>Instead of the test months I populate my observable array called allMonths now with (like this)</p>
  
  <pre><code>self.tak = ko.observable(100);
  self.styckpris = ko.observable(10);
  self.grundpris = ko.observable(500);
  
  self.allMonths = ko.observableArray([
  new monthData(2013, 1, 412, 142, self),
  new monthData(2013, 2, 112, 642, self),              
  new monthData(2013, 2, 100, 742, self),
  new monthData(2013, 3, 6513, 69, self),
  new monthData(2013, 4, 34, 211, self),
  new monthData(2013, 5, 123, 435, self),
  new monthData(2013, 6, 412, 142, self),
  new monthData(2013, 7, 412, 142, self)
  ]);
  </code></pre>
  
  <p>I want to do a $.getJSON and insert that into my obs array instead.</p>
  
  <p>This is the output of the $.getJSON source if I view it directly from the url:</p>
  
  <pre><code>[{"tak":2700,"styckpris":35,"grundpris":20000,"year":2012,"month":2,"ss":784,"ms":576,"count":1360,"price":20000},{"tak":2700,"styckpris":35,"grundpris":20000,"year":2012,"month":3,"ss":977,"ms":636,"count":1613,"price":20000},{"tak":2700,"styckpris":35,"grundpris":20000,"year":2012,"month":4,"ss":1040,"ms":726,"count":1766,"price":20000},{"tak":2700,"styckpris":35,"grundpris":20000,"year":2012,"month":5,"ss":1373,"ms":1013,"count":2386,"price":20000},{"tak":2700,"styckpris":35,"grundpris":20000,"year":2012,"month":6,"ss":856,"ms":612,"count":1468,"price":20000},{"tak":2700,"styckpris":35,"grundpris":20000,"year":2012,"month":7,"ss":594,"ms":299,"count":893,"price":20000},{"tak":2700,"styckpris":35,"grundpris":20000,"year":2012,"month":8,"ss":1261,"ms":826,"count":2087,"price":20000},{"tak":2700,"styckpris":35,"grundpris":20000,"year":2012,"month":9,"ss":1092,"ms":729,"count":1821,"price":20000},{"tak":2700,"styckpris":35,"grundpris":20000,"year":2012,"month":10,"ss":1097,"ms":747,"count":1844,"price":20000},{"tak":2700,"styckpris":35,"grundpris":20000,"year":2012,"month":11,"ss":872,"ms":706,"count":1578,"price":20000},{"tak":2700,"styckpris":35,"grundpris":20000,"year":2012,"month":12,"ss":329,"ms":110,"count":439,"price":20000},{"tak":2700,"styckpris":35,"grundpris":20000,"year":2013,"month":2,"ss":911,"ms":0,"count":911,"price":20000},{"tak":2700,"styckpris":35,"grundpris":20000,"year":2013,"month":3,"ss":1002,"ms":0,"count":1002,"price":20000},{"tak":2700,"styckpris":35,"grundpris":20000,"year":2013,"month":4,"ss":1157,"ms":0,"count":1157,"price":20000},{"tak":2700,"styckpris":35,"grundpris":20000,"year":2013,"month":5,"ss":852,"ms":421,"count":1273,"price":20000}]
  </code></pre>
  
  <p>I have been trying to loop through this array I get from the getJSON and put them in allMonths but I cant figure out the correct syntax. I am not interested in tak, styckpris or grundpris, the 3 first properties, I want year, month, ss &amp; ms</p>
  
  <p>I would like something like:</p>
  
  <pre><code>var allMonths = ko.observableArray();
  $.getJSON('Simulera/monthData', function (data) {
              $.each(data, function (i, val) {
                  allMonths.push( new monthData(val.year, val.month, val.ss, val.ms, self) );
              });
          });
  </code></pre>
  
  <p>but this doesnt work. how can I go through the information json returns and insert them into my observable array as a monthData object type?</p>