javascript] OOP정리. override

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function inherit(proto) { function F() { } F.prototype = proto; return new F; } //상속 관련! function extend(Child, Parent) { Child.prototype = inherit(Parent.prototype); Child.prototype.constructor = Child; Child.parent = Parent.prototype; } // todo : override var Pet = function (name) { this.Cry = function () { return "Cry:"; } } var Dog = function (name) { //Pet.call(this, name); Pet.apply(this, [name]); //override var _Cry = this.Cry; this.Cry = function () { var cry = _Cry(); return cry + "멍"; }; } var Cat = function (name) { //Pet.call(this, name); Pet.apply(this, [name]); //override var _Cry = this.Cry; this.Cry = function () { var cry = _Cry(); return cry + "냐옹"; }; } extend(Dog, Pet); extend(Cat, Pet); var dog = new Dog("강아지"); alert(dog.Cry()); var cat = new Cat("고양이"); alert(cat.Cry());

 

 

override 구현.

 

var Dog = function (name) {
            //Pet.call(this, name);
            Pet.apply(this, [name]);
            //override
            var _Cry = this.Cry;
            this.Cry = function () {
               var cry = _Cry();   // 상위 function call.
               return cry + "멍";
            };
        }