javascript - 转换 JSON 格式(分组依据)

Question

我有这样的 JSON 对象:

[{
    "name" : "cat",
    "value" : 17,
    "group" : "animal",
},
 {
    "name" : "dog",
    "value" : 6,
    "group" : "animal",
},
 {
    "name" : "snak",
    "value" : 2,
    "group" : "animal",
},
{
    "name" : "tesla",
    "value" : 11,
    "group" : "car",
},
{
    "name" : "bmw",
    "value" : 23,
    "group" : "car",
}]

我想通过 JS 将此 JSON 转换为以下格式:

[{
  "name":"animal",
  "children":[
     {"name":"cat", "value":17},
     {"name":"dog", "value":6},
     {"name":"snak", "value":2}
]},
{
  "name":"car",
  "children":[
     {"name":"bmw", "value":11},
     {"name":"tesla", "value":23}
]}]

我尝试通过 Reduce 转换和过滤功能，但我无法转换为这种格式。

编辑:

我测试的代码是这样的。

let groupBy = function(xs, key) {
    return xs.reduce(function(rv, x) {
    (rv[x[key]] = rv[x[key]] || []).push(x);
    return rv;
    }, {});
};

let groubedByExchange=groupBy(JSON_data, 'group');

Answer 1

您可以构建一个数组并在数组中搜索相同的组。

var array = [{ name: "cat", value: 17, group: "animal" }, { name: "dog", value: 6, group: "animal" }, { name: "snak", value: 2, group: "animal" }, { name: "tesla", value: 11, group: "car" }, { name: "bmw", value: 23, group: "car" }],
    result = array.reduce((r, { group: name, ...object }) => {
        var temp = r.find(o => o.name === name);
        if (!temp) r.push(temp = { name, children: [] });
        temp.children.push(object);
        return r;
    }, []);
    
console.log(result);

.as-console-wrapper { max-height: 100% !important; top: 0; }