想玩魔兽世界玩什么职业好?
官方的定义:
The Observer Pattern defines a one-to-many dependency between objects so that when one object changes state, all of its dependents are notified and updated automatically. (观察者模式定义了对象间的一种一对多依赖关系,使得每当一个对象改变状态,则所有依赖于它的对象都会得到通知并被自动更新)...
8180