我可以在 javascript 中获取原型的所有实例吗? [英] Can I get all instances for a prototype in javascript?

问题描述

获取一个对象的原型很容易，但是有没有办法获取所有具有特定原型的实例?

It is easy to get the prototype of an object, but is there any way to get all the instances that has a specific prototype?

像这样:

var allAnimals = Animal.prototype.getInstances();

可以编写自定义代码来跟踪实例化的对象，但我对是否有任何内置方法感兴趣.

One could write custom code to keep track of instantiated objects, but I'm interested in whether there is any build-in method for this.

推荐答案

你可以试试这样的

function A(f){
    this.field = f;
    A.instances.push(this);
}

A.instances = [];

之后

var one = new A(10), two=new A('123');

在A.instances中将包含两个创建的对象

in A.instances will contain two created objects

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