Need to push all JSON into an array from AJAX, in jQuery

Here's the code:

var newFeeds = []; // ** GLOBAL **

$(document.body).click(function() {

$.ajax({
            type: "POST",
            url: "http://mysite.com/feed.php",
            success:  function (data) {
                        $(newFeeds).push(data);
                        alert(newFeeds.length);
                        },
            error: function(error){
                      alert('Error: ' + error);
                    },
            dataType: "json"
    });
});

I can get the data from the server. All is ok, but the array never fills up. But strangely newFeeds.length returns 0! Why? I need to take the arrived data and push it into an array for later use.