Javascript扩展了一个对象问题 [英] Javascript extending an object question

问题描述

我有以下代码：

this.myObject = {
   key1: "val1",
   key2: "val2"
}

this.aMethod = function (newObject) {
    ...

这里我想要一个新对象（可能是继承自 this.myObject ），其中包含<$ c中的所有内容$ c> this.myObject plus newObject 中的任何内容， newObject 应该覆盖 this.myObject中已有的字段

Here I want a new object (probably that inherits from this.myObject) that contains everything in this.myObject plus whatever is in newObject also, fields in newObject should override already existing fields in this.myObject

我该怎么做？

这个想法是 this.myObject 提供了一些默认值 - 但方法的用户可以覆盖这些值。我也批评这种整体模式。谢谢。

This idea is that this.myObject provides some default values - but the user of the method can override these values. I'm open to criticisms of this overall "pattern" as well. Thanks.

推荐答案

SomeObject.prototype.someMethod = function() {

    this.myObject = { key1: 1, key2: 2 };

    this.aMethod = function (o) {
        var newObject = object(this.myObject);

        for (var prop in o) {
            if (o.hasOwnProperty(prop)) {
                newObject[prop] = o[prop];
            }
        }

        // Now newObject contains all properties from the passed in object
        // and also inherits all properties from myObject

    };

};

注意：我正在使用来自@Marco答案的对象函数。

Note: I am using the object function from @Marco's answer.

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