$.getJSON and all the AJAX functions are asynchronous; the function
returns before it gets any result. That's why there's a callback
function: it gets called when the data are available. So when you
write
load_comments();
$.each(_json.comments, function(comment) {
load_comments() just sets up the AJAX call and returns, so the each
starts with _json not yet initialized. You can get around it by using
asynch: false in a $.ajax call (see the documentation), but that's not
the ideal solution. Better to put your $.each into the callback
function:
$.getJSON(paths.get_comment, _params, function(data)
{
$.each (data.comments, function (comment){...})
});
Danny
On Jan 16, 1:17 am, Niels <[EMAIL PROTECTED]> wrote:
> Is there any way to put a return from within a callback into a global
> variable? I'm trying to retrieve JSON-values in one statement, and
> output them in another statement; and code looks like this:
>
> var _json;
>
> function load_comments(id, params) {
> if (typeof id != 'number' && typeof id == 'object' && params == null)
> {
> // Only the params were specified.
> _params = process_params(id);
>
> $.getJSON(paths.get_comment, _params, function(data) { _json
> = data;
> return _json; });
> console.info('1 : $.getJSON(' + paths.get_comment + ', ' +
> _params +
> ')');
> }
>
> }
>
> function display_comments() {
> load_comments();
> $.each(_json.comments, function(comment) {
> $("#recent-comments-list").append("<li>" + comment.content +
> "</
> li>");
> });
>
> }
>
> Unfortunately, _json seems to remain undefined... What am I doing
> wrong? Or is there really no way to accomplish this?
>
> Thanks a lot!
> Niels
