Question

For some reason my values are not being stored in the array:

var req = new Array();
$.get('./ajax/get_cat_info.php?cid=' +cid, function(data, textStatus) {
    var count = 0;
    $.each(data, function(key, val) {
        $('#' + key).show();
        if(val == 1) {
            req[count] = key;
            count = count + 1;
            //var arLen=req.length;
            //alert('l: ' + arLen); // this works though
        }
    });
}, 'json');

var arLen=req.length;
alert('l: ' + arLen);

I get alerted “l: 0” at the end. If I uncomment the line alert in the IF statement, it alerts on each one, then still alerts 0.

Answer 1

The get call is running asynchronously, and so arLen=req.length is being evaluated prior to the function of elements being set actually completing. You can set the values accordingly from within the callback of the async call, as you determined.