從數組中的鍵向對象數組 object 添加鍵和值

Question

我有一個對象數組：

let json = [
  {cat: 'one', device: 'iphone',   site: 'google', val1:10, val2:20, val3:30},
  {cat: 'two', device: 'iphone',  site: 'bing', val1:23, val2:12, val3:14},
  {cat: 'three', device: 'iphone',  site: 'jeeves', val1:67, val2:78, val3:12},
  {cat: 'four',  device: 'ipad',  site: 'google', val1:10, val2:20, val3:30},
  {cat: 'five',  device: 'ipad',  site: 'bing', val1:23, val2:12, val3:14},
  {cat: 'six',  device: 'ipad',  site: 'jeeves', val1:67, val2:78, val3:12},
  {cat: 'seven',  device: 'mac',   site: 'google', val1:10, val2:20, val3:30},
  {cat: 'eight',  device: 'mac',   site: 'bing', val1:23, val2:12, val3:14},
  {cat: 'nine',  device: 'mac',   site: 'jeeves', val1:67, val2:78, val3:15}  
]

然后我有一個數組： arr = ['device', 'object']

我有一個 object：

obj= {
  a: 'one',
}

我想將數組中的任何內容（在本例中為['device', 'object'] ）添加到 obj.

在上面的例子中，我希望 obj 看起來像這些對象數組：

[
{
  a: 'one',
  device: 'iphone'
  object: 'google'
},
{
  a: 'two',
  device: 'iphone'
  object: 'bing'
},
{
  a: 'three',
  device: 'iphone'
  object: 'jeeves'
},
.........
]

鍵數組（arr）可能不同，因此不確定如何編寫可重用的 function。

Answer 1

如果我理解你的話，你可以這樣做。 我假設您json和obj已排序並具有相同的列表，否則您還需要通過cat進行搜索以在json中找到正確的行

 const json = [ {cat: 'one', device: 'iphone', site: 'google', val1:10, val2:20, val3:30}, {cat: 'two', device: 'iphone', site: 'bing', val1:23, val2:12, val3:14}, {cat: 'three', device: 'iphone', site: 'jeeves', val1:67, val2:78, val3:12}, ] const objs = [ { a: 'one', }, { a: 'two', }, { a: 'three', }, ] const arr = ['device', 'site'] const result = objs.map((obj, i) => { arr.forEach(key => { obj[key] = json[i][key] }) return obj }) console.log(result)