Detect possibly conflicting or multi-bound events in jQuery

gistfile1.js

(function($) {
    var add = $.event.add;
    $.event.add = function() {
        var elem = arguments[0],
            types = arguments[1];
        if ( !types || !elem ) return add.apply(this, arguments);
        types = (types || "").match(/\S+/g) || [];
        var events = $._data(elem).events;
        if ( events && types.length ) {
            $.each(types, function(i, type) {
                if ( type in events ) console.warn('Multiple event type "'+type+'" detected.', elem, events[type]);
            });
        }
        return add.apply(this, arguments);
    };
}(jQuery));