如果特定键的值相同，如何将值更新为嵌套的对象数组？

Question

let data = [
{"name":"Dhanush","createdAt":"2021/01/13 16:57:53","songs":[]},
{"name":"Dharma","createdAt":"2021/01/13 17:02:47","songs":[]},
{"name":"Sachin","createdAt":"2021/01/13 17:30:45","songs":[]}
]

let name = "Dhanush"

let song = {
  'id':1,
  'duration': '5 mins',
  'name': 'Bingo'
}

这里我需要循环数据数组并检查data.name === name，如果是真的我需要将歌曲object推送到数据内的歌曲数组中。

这表示

data = data.map(val => val.name === name ? val.songs = [...val.songs,song] : val.songs)

我试过这样。 但它不起作用。

非常感谢您的帮助。

谢谢

Answer 1

使用 map 方法时，您没有返回val 。

 let data = [ { name: 'Dhanush', createdAt: '2021/01/13 16:57:53', songs: [] }, { name: 'Dharma', createdAt: '2021/01/13 17:02:47', songs: [] }, { name: 'Sachin', createdAt: '2021/01/13 17:30:45', songs: [] }, ]; const name = 'Dhanush'; const song = { id: 1, duration: '5 mins', name: 'Bingo', }; data = data.map( (val) => ( val.name === name? (val.songs = [...val.songs, song]): val.songs, val ) ); console.log(data);