Question

我有这个带有这些JSON对象的数组。我想将KEY值转换为Javascript数组，因此它看起来像。看一下Artist键。

我该怎么做？

json_data = [
    {
        artist: "picaso",
        cover: "http:/blah.jpg",
        genre: "illouson",
        title: "mypicture",
        uploaddate: "2019-04-22T19:48:43.454Z",
        url: "https://blah.com"
    },

    {
        artist: "malevich",
        cover: "http:/blah.jpg",
        genre: "black square",
        title: "mypicture",
        uploaddate: "2019-04-22T19:48:43.454Z",
        url: "https://blah.com/blacksquare"
    },
]

>

预期输出

json_data = [
    {
        artist: ["picaso"],
        cover: "http:/blah.jpg",
        genre: "illouson",
        title: "mypicture",
        uploaddate: "2019-04-22T19:48:43.454Z",
        url: "https://blah.com"
    },

    {
        artist: ["malevich"],
        cover: "http:/blah.jpg",
        genre: "black square",
        title: "mypicture",
        uploaddate: "2019-04-22T19:48:43.454Z",
        url: "https://blah.com/blacksquare"
    },
]

Answer 1

只需使用简单的forEach()循环即可将artist属性设置为Array类型：

var json_data = [
{
artist: "picaso",
cover: "http:/blah.jpg",
genre: "illouson",
title: "mypicture",
uploaddate: "2019-04-22T19:48:43.454Z",
url: "https://blah.com"},

{
artist: "malevich",
cover: "http:/blah.jpg",
genre: "black square",
title: "mypicture",
uploaddate: "2019-04-22T19:48:43.454Z",
url: "https://blah.com/blacksquare"},
];
json_data.forEach((item) => item.artist? item.artist = [item.artist]: item.artist);
console.log(json_data);

Answer 2

使用地图

json_data = [
{
artist: "picaso",
cover: "http:/blah.jpg",
genre: "illouson",
title: "mypicture",
uploaddate: "2019-04-22T19:48:43.454Z",
url: "https://blah.com"},

{
artist: "malevich",
cover: "http:/blah.jpg",
genre: "black square",
title: "mypicture",
uploaddate: "2019-04-22T19:48:43.454Z",
url: "https://blah.com/blacksquare"},
]

console.log(json_data.map(e=>e.artist=[e.artist]))

Answer 3

只需使用map：

const json_data = [{
    artist: "picaso",
    cover: "http:/blah.jpg",
    genre: "illouson",
    title: "mypicture",
    uploaddate: "2019-04-22T19:48:43.454Z",
    url: "https://blah.com"
  },

  {
    artist: "malevich",
    cover: "http:/blah.jpg",
    genre: "black square",
    title: "mypicture",
    uploaddate: "2019-04-22T19:48:43.454Z",
    url: "https://blah.com/blacksquare"
  }
];

const res = json_data.map(obj => obj.artist ? { ...obj, artist: [obj.artist] } : obj);

console.log(res);

.as-console-wrapper { max-height: 100% !important; top: auto; }

持有JSON对象的Javascript数组将一个键值转换为javascript数组

3 个答案: