Javascript: Sort Object By Keys

sort_obj_by_keys

function sortObject(o) {
    var sorted = {}, a = [],key;
    //Get array keys
    a = Object.keys(o);
    //Sort it
    a.sort();
    //Construct object by iteration
    for (key = 0; key < a.length; key++) {
        sorted[a[key]] = o[a[key]];
    }
    return sorted;
}