JavaScript 模拟策略模式
作者:互联网
/** * 模拟一个接口,其方法会抛出异常; */ function FlyInter () {} FlyInter.prototype.fly = function() { throw '实现这个接口'; }; /** * 实现一个fly noway的方法; */ function FlyNoWays() {} FlyNoWays.prototype.fly = function() { console.log('fly noways'); }; /** * 实现一个fly with Wings的方法; */ function FlyWithWings () {} FlyWithWings.prototype.fly = function() { console.log('fly with wings'); }; /** * 鸭子超类;构造函数中设置了一个接口; */ function Duck() { this.flyI = new FlyInter(); } Duck.prototype.swim = function() { console.log('duck can swim'); }; /** * fly方法调用flyI接口的fly方法; */ Duck.prototype.fly = function() { this.flyI.fly(); }; /** * RubberDuck继承Duck;构造函数中设置自己的fly对象; */ function RubberDuck () { this.flyI = new FlyNoWays(); } RubberDuck.prototype = new Duck(); RubberDuck.prototype.constructor = RubberDuck; delete RubberDuck.prototype.flyI; var rDuck = new RubberDuck(); //直接调用Duck中的fly()方法即可; rDuck.fly();
标签:fly,function,RubberDuck,flyI,JavaScript,模式,Duck,prototype,模拟 来源: https://blog.51cto.com/u_15241951/2841072