Inspector显示3秒更新，我如何获得新值？

Question

In index.php I have a javasript, that take JSON data from data.php every 3 sec. Data.php end with this:

echo json_encode($row);

Inspector in index.php shows a couple of objects (which are refreshed each 3 sec). Say 3 rows in DB, then it will look like this:

=>[Object, Object, Object]

I can open the above, and it looks like this:

0: Object 1: Object 2: Object

Each three can be opened again I see my newly updated data (if it change in data.php).

How do I pull out information from those objects, so I can use it live on index.php?

I should probably add the javascript that import data as well:

    function populate(){
       var items= [];
       $.ajax({
       url: 'data.php',
       type: 'GET',
       dataType: 'json',

       success: function(data){

          console.log(data);  

          $.each(data, function(i,v){
          items.push('< th >'+v+'< /th >');
          });       

          $('#sampleTable').html(items.join(','));
      },
      error: function(err){
          console.log(err.responseText);
      }
   });
   }

   setInterval(function(){
      populate();
   },3000);

Answer 1

var obj = JSON.parse(object_to_parse);

and then use associative names like if it is from db and there is column name id then you get it by obj.id and so on
maybe then

for(var i=0;i<response_data.length;i++)
{
  obj = JSON.parse(response_data[i]);
  var new_li = $('<li/>',{ 'text':obj.id });
  $('#parrent_id').append(new_li);
}