find index of the object an array angularjs
<p>for example I have this array :</p>

<pre><code>  $scope.records = [
    {
      "Name" : "Alfreds Futterkiste",
      "Country" : "Germany"
    },
    {
      "Name" : "Berglunds snabbköp",
      "Country" : "Sweden"
    },
    {
      "Name" : "Centro comercial Moctezuma",
      "Country" : "Mexico"
    },
    {
      "Name" : "Ernst Handel",
      "Country" : "Austria"
    }
  ];
</code></pre>

<p>How to get value index from object? with example "Country" : "Austria" this index is 3 </p>