Question

我想要利用联合材料集束器和接收器实现类似于这一组的合成:

globe.camera.position = Position.create();

这被认为相当于这一表述:

globe.getCamera().setPosition(Position.create());

我在创建“第一层”的采集器/设计器方面没有任何问题。

function Camera() {

    var x,y,z;

this.__defineGetter__("camera", function() {
        alert("This is the camera getter");
});

    this.__defineSetter__("camera", function(position) {            
        alert("This is the camera setter");
});

}

...

globe=new Camera();
globe.camera=...
c=globe.camera;

...

但是,在如何界定立场时,并不十分确定。我正试图这样做,但赢得了以下工作:

function Position() {

    this.__defineGetter__("position", function() {
        alert("This is the position getter");
});

}

globe.camera=new Position();
pos=globe.camera.position;

耳机的警示显示。这方面的任何cl? 是否甚至有可能实现这种行为? 我在谷歌上搜索了很多东西,但本特能够打上正确的搜索条件,而登机/打字机的例子往往非常简单。提前感谢。

Answer 1

<代码>defineGetter__,朋友们不是标准。

var Camera = Object.create({}, {
  position: {
    get: function () {
      return Position.create();
    },
    set: function (p) {
      this._position = p;
    }
  }
});

Object.defineProperty(globe, "camera", {
  get: function () {
    return Object.create(Camera);
  }
});

页: 1

However, why are you using getters and setters? They are evil. You should avoid them really unless your doing something clever.

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