将对象键和值转换为对象数组 [英] convert object keys and values to an array of objects

问题描述

我有一个如下所示的对象：

const response = {
  id1-field1: true,
  id1-field2: 0,
  id1-field3: 3,
  id2-field1: false,
  id2-field2: 1,
  id2-field3: 0,
  id3-field1: false,
  id3-field2: 0,
  id3-field3: 0,
}

我需要创建一个如下所示的数组：

const formatted = [
 {id: "id1", field1: true, field2: 0, field3: 3},
 {id: "id2", field1: false, field2: 1, field3: 0},
 {id: "id3", field1: false, field2: 0, field3: 0},
]

实现这一目标的最佳方式是什么？这就是我到目前为止的情况：

1. 在数组中获取对象的键
2. 用连字符分隔对象键
3. 使用原始键添加对象值

数据-lang="js"数据-隐藏="假"数据-控制台="真"数据-巴贝尔="假">

const response = {
  "id1-field1": true,
  "id1-field2": 0,
  "id1-field3": 3,
  "id2-field1": false,
  "id2-field2": 1,
  "id2-field3": 0,
  "id3-field1": false,
  "id3-field2": 0,
  "id3-field3": 0,
}

const keys = Object.keys(response)

const split = keys.map(x => { 
  return ({"oldId": x, "id": x.split('-')[0], "key": x.split('-')[1]})
})

const splitWithValues = split.map( x => {
    let o = x;
    o.value = response[x.oldId]
    return o
})

console.log(splitWithValues)

推荐答案

使用Object#keys获取密钥，reduce放入Map。然后spreadMap#values获取数组：

数据-lang="js"数据-隐藏="假"数据-控制台="真"数据-巴贝尔="假">

const response = {"id1-field1":true,"id1-field2":0,"id1-field3":3,"id2-field1":false,"id2-field2":1,"id2-field3":0,"id3-field1":false,"id3-field2":0,"id3-field3":0};

const result = [...Object.keys(response)
  .reduce((m, key) => {
    const [id, field] = key.split('-');
    
    const item = m.get(id) || { id };
    
    item[field] = response[key];
    
    return m.set(id, item);
  }, new Map()).values()];
  
console.log(result);

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