Javascript:将数组转换为对象

Question

这个问题在这里已经有了答案:





Most efficient method to groupby on an array of objects

(53 个回答)



How to group an array of objects by key

(26 个回答)


7 个月前关闭。




我有数组:

[
  ['a', 'b', 'c'],
  ['a', 'h', 'k'],
  ['c', 'd', 'e']
]

有没有最好的方法将它转换成这样的对象？

{
  a: [
       ['a', 'b', 'c'],
       ['a', 'h', 'k'],
     ],
  c: [
       ['c', 'd', 'e']
     ]
}

Answer 1

您可以使用 .reduce() 获得所需的输出:

const data = [
  ['a', 'b', 'c'],
  ['a', 'h', 'k'],
  ['c', 'd', 'e']
];

const result = data.reduce((r, c) => {
  r[c[0]] = r[c[0]] || [];
  r[c[0]].push(c);
  return r;
}, {});

console.log(result);

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