Parsing multi-level JSON [duplicate]

Answer 1

You need to use recursion.

function get_all_ids(data) {
    var result = [];

    $(data).each(function (i, element) {
        result.push(element.attr.id);

        if (element.children && element.children.length > 0) {
            var ids = get_all_ids(element.children);

            result = result.concat(ids); // or $.merge(result, ids);
        }
    });

    return result;
}