设计模式（二）——创建型：工厂模式-区分变与不变

浅谈构造器 构造器代码示例： class User { name: string; age: number; carrer: string; constructor(name: string, age: number, career: string) { this.name = name; this.age = age; this.carrer = career; } } const user = new User("suxiong", 24, "...