title: Index value of Array
body: <p>I have a json file with contents like this:</p>
  
  <pre><code>{
       "aaa":{
           "status":"available",
           "classkey":"dotnet"
       },
       "bbb":{
           "ccc":{
               "com":"available",
               "net":"available",
               "info":"available",
               "org":"available"
            }
       }
  }
  </code></pre>
  
  <p>Now I want to fetch the value of array by  index (ex., <code>xxx[0]</code> like this not like <code>xxx['aaa']</code>). How do I do that? </p>