hahaha

gistfile1.js

    deleteMessageThreads: function(threadUrls) {
        var csrfToken = $('#csrf').find('[name=csrfmiddlewaretoken]').get(0).value;
        var messagePks = [];

        var asyncEvent = function() {
            var dfd = new jQuery.Deferred();
            var numDone = 0;
            var numTotal = threadUrls.length;

            var ajaxCalls = _.map(threadUrls, function(url) {
                $.get(url, function(resp) {
                    var ids = _.map($(resp).find('.msg-list-itm'), function(i) {
                        return $(i).data('message-id');
                    });
                    messagePks = _.union(messagePks, ids);

                    numDone += 1;

                    if (numDone === numTotal) {
                        dfd.resolve();
                    }
                })
            });

            return dfd.promise();
        }

        $.when(asyncEvent()).done(function() {
            var data = $.param({
                csrfmiddlewaretoken: csrfToken,
                message_pks: messagePks
            }, true);

            $.post('/account/messages/remove/',
                data,
                function(data) {
                    window.location.reload();
                }
            );
        });
    },