title: JSON Object return values based on position
body: <p>I have a JSON object</p>
  
  <pre><code>var obj = {"firstName":"John", "lastName":"Doe"}
  </code></pre>
  
  <p>And I can return values using <code>obj.firstName</code> etc. But in my case I might not know the name of the header but I know its position. Is there a way I can return the value using its position? e.g. <code>obj.1</code></p>