return array jquery

Question

I have problem to return array in jquery. I used ajax to response data from mysql and I have to add it do array and return.

This is my code:

function addOption()
    {
         itemsarray = [];

        $.ajax({
            type: "POST",
            url: "",
            data:{
                option: 'com_zamowienia',
                view: 'zamowienia_lista',
                task: 'getStatusy'
            },
            success: function(data){
                var obj = $.parseJSON(data);         
                    for (x=0; x<obj.length; x++) {
                        itemsarray.push(obj[x].nazwa);
                }
            }
        });

        return itemsarray;
    }

When I use : alert(addOption()). I see empty alert

By default, AJAX calls are asynchronous. You can not return the results from the function, as it has not happened at the time it finishes. — Orbling
– Orbling, Commented Sep 18, 2012 at 15:54

thecodeparadox · Accepted Answer · 2012-09-18 15:54:04Z

4

As AJAX is asynchronous, so you can't return array like that.

So, you should use callback function to get the array:

function addOption(callback)
    {
         itemsarray = [];

        $.ajax({
            type: "POST",
            url: "",
            data:{
                option: 'com_zamowienia',
                view: 'zamowienia_lista',
                task: 'getStatusy'
            },
            success: function(data){
                var obj = $.parseJSON(data);         
                for (x=0; x<obj.length; x++) {
                        itemsarray.push(obj[x].nazwa);
                }
                // return you itemsarray through callback function parameter
                callback(itemsarray);
            }
        });
    }

Call the function like:

addOption(function(myarr) {
   console.log( myarr );
});

answered Sep 18, 2012 at 15:54

thecodeparadox

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