应该为私有变量使用getter和setter方法吗? [英] Should one use getters and setters for private variables?

问题描述

我正在使用这样的JavaScript对象:

I'm using JavaScript objects like this:

var obj = new Foob;

我应该假装有一种私人方式来做吗?

should I pretend like there is a private way and do:

obj.get('foo');

或者我应该尝试直接以方式访问:

or should I just try to access directly as :

obj.foo

推荐答案

实际上，您可以拥有只能通过Java语言中的setter和getter访问的变量:

You can actually have variables which can only be accessed through setters and getters in Javascript:

function Foob(){

    var foo = 5;

    this.getFoo = function(){
        return foo;
    }


    this.setFoo = function(newFoo){
        foo = newFoo;
        return this;
    }

}

var obj = new Foob;
obj.getFoo(); // 5
obj.foo; // undefined

或者如果您想要通用的获取/设置器:

Or if you want a generic getter/setter:

function Foob(){

    // You can set default values in the data object
    var data = {};

    this.get = function(key){
        return data[key];
    }

    this.set = function(key, value){
        data[key] = value;
        return this;
    }

}

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