问javascript中介者与观察者

EN

var EventMediator = {
    publish: function (target, message) {
        var args = Array.prototype.slice.call(arguments, 2);
        var msgs = target.messages || [];
        for (var i = 0; i < msgs.length; i++) {
            var msg = msgs[i];
            msg.callback.apply(msg.context, args);
        }
    },
    register: function (target, message, fn) {
        target.messages = target.messages || [];
        target.messages.push({
            context: target,
            callback: fn
        });
    }
};

var t1 = {name: 'kk'};
var t2 = {name: 'gg'};

EventMediator.register(t1, "nameChanged", function () {
    console.info("t1 name chagned");
});
EventMediator.publish(t1, "nameChanged");