备忘录模式(Memento)

可以使用此模式的一个例子是将物件回复到其先前的状态

class Person {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }

  hydrate() {
    return { ...this };
  }

  deydreate({ name, age }) {
    this.name = name;
    this.age = age;
  }
}

class Store {
  constructor() {
    this.store = {};
  }

  add(key, value) {
    this.store[key] = value;
  }
  get(key) {
    return this.store[key];
  }
}

const dao = new Person("dao", 12);
const lang = new Person("lang", 30);
const store = new Store();

store.add(1, dao.hydrate());
store.add(2, lang.hydrate());

dao.name = "newdao";
lang.name = "newlang";

console.log(dao);
console.log(lang);

dao.deydreate(store.get(1));
lang.deydreate(store.get(2));
console.log(dao);
console.log(lang);

#备忘录模式(Memento)

备忘录模式(Memento)