title: jQuery DataTables fnRender Increment Column
body: <p>I'm trying to create a row inside my datatable that increments +1 each row. I've been told the easiest way to do this would be using fnRender. Now I've used fnRender to change data that's already in a column from the serverside processor, but never to create a new column alone.<br>
  Any help would be awesome!</p>
  
  <p>Here's my current code:</p>
  
  <pre><code>oTable = $('#testingz').dataTable({
      "bProcessing": true,
      "bServerSide": true,
      "bJQueryUI": true,
      "sPaginationType": "full_numbers",
      "aaSorting": [ [1,'desc'] ],
      "sDom": '&lt;""l&gt;rt&lt;"F"fp&gt;',
          "sAjaxSource": "server_processing.php",
          "aoColumnDefs": [ 
              {
                  "fnRender": function ( o, val ) {
                  return '&lt;a href="http://honedge.com/' + o.aData[0] + '"&gt;' + o.aData[0] + '&lt;/a&gt;';
                  },
                  "aTargets": [ 0 ]
              }
          ]
  });
  </code></pre>