重命名对象中的字段 [英] Renaming a field in an object

问题描述

如果我有以下物品：

JsonObj = {
    "frames": {
        "cinema": {
            "sourceSize": { "w": 256, "h": 200 },
            "frame": { "x": 0, "y": 0, "w": 256, "h": 192 }
        },
        "tree": {
            "sourceSize": { "w": 128, "h": 110 },
            "frame": { "x": 0, "y": 302, "w": 70, "h": 96 }
        }
    }
};

此JSON对象被解析为变量 parsedJSON 使用此JavaScript代码：

This JSON object is parsed into the variable parsedJSON using this JavaScript code:

var parsedJSON = JSON.parse(JsonObj);

如何重命名 parsedJSON中的frames属性到别的什么地方？

How would I rename the "frames" property in parsedJSON to something else?

推荐答案

将 somethingElse 设置为参考什么 frames 指向，然后删除 frames 。

Set the somethingElse as a reference to what frames points to, then delete frames.

parsedJSON.somethingElse = parsedJSON.frames;
delete parsedJSON.frames;

这里重要的是 frames 是只是一个指向对象的指针;如果删除 frames 指针， somethingElse 仍引用有效对象。

The important thing here is that frames is simply a pointer to an object; if you delete the frames pointer, somethingElse still references a valid object.

^{还要注意，没有JSON对象这样的东西;你有一个对象的JSON表示，这是一个字符串，或你有一个对象（通常可以通过对象文字符号来定义，这通常是混淆所在的地方）。}

^{Also note there's no such thing as a "JSON object"; you have a JSON representation of an object, which is a string, or you have an object (which can often be defined via object literal notation, which is often where the confusion lies).}

这篇关于重命名对象中的字段的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！