对象实例化后，构造函数中的JS运行函数 [英] JS run function from constructor after object instantiation

问题描述

是否可以这样做:

var hammer = new Hammer(); // create a new instance
hammer(nail); // really call Hammer.prototoype.hit(object);

我可以在原始对象上找到它，但是在创建对象的新实例时找不到.这就是我遇到的问题:

I can figure it out on a raw object, but not when creating a new instance of an object. This is what I am running into:

function Hammer(options) {
  this.config = options.blah;
  this.hit(/* ? */);
  return this;
}

Hammer.prototype.hit = function(obj) {
  // ...
}

当我调用构造函数时，我想传递特殊的选项-而不是要敲的钉子.但是，稍后再调用时，我想传递一个钉子.我丢失了一些东西.

When I call the constructor, I want to pass in special options - not what nail to hit. However, when I call it later, I want to pass in a nail. I'm missing something.

推荐答案

一种解决方案是根本不创建构造函数:

One solution is to not create a constructor function at all:

var hammer = newHammer();

hammer(nail);

hammer.clean();

function newHammer(options) {
    var config = options.blah;

    hit.clean = clean;

    return hit;

    function hit(obj) {
        // ...
    }

    function clean() {
        // ...
    }
}

对我来说，这是比弄乱构造函数和原型更干净的解决方案.

To me, this is a much cleaner solution than messing around with constructors and prototypes.

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