将二维数组转换为 object 并使用第一个数组元素作为键

Question

想象一下，我有这个 arrays 数组：

myData = [
  ["wantThisAsKey1",someElement1,anotherElement1],
  ["wantThisAsKey2",someElement2,anotherElement2]
]

我需要将此数组转换为 object，其中每个数组的第一个元素用作键：

myDataObject = {
  "wantThisAsKey1": [someElement1,anotherElement1],
  "wantThisAsKey2": [someElement2,anotherElement2],
}

如何以一般方式执行此操作，例如myDataObject = convertToObject(myData) ？

Answer 1

尝试这个：

 let myData = [ ["wantThisAsKey1","someElement1","anotherElement1"], ["wantThisAsKey2","someElement2","anotherElement2"] ]; let myDataObject = convertToObject(myData); console.log(myDataObject); function convertToObject(data){ let res = {}; for(let i = 0; i < data.length; i++) res[data[i][0]] = data[i].slice(1); return res; }

Answer 2

为此，您可以将 arrays reduce function 与解构赋值相结合：

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reduce

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Destructuring_assignment

 myData = [ ["wantThisAsKey1", 1, 2], ["wantThisAsKey2", 2, 3] ] const newobject = myData.reduce((acc, elem) => { const [key, ...rest] = elem; acc[key] = rest return acc; }, {}) console.log(newobject); // Result: { wantThisAsKey1: [ 1, 2 ], wantThisAsKey2: [ 2, 3 ] }

Answer 3

尝试在此处使用 reduce。 像这样。

const result = myData.reduce( (result, ele) => {
  const [key, ...other] = ele
  result[key] = other
  return result
 }, {})

// output = { wantThisAsKey1: [ 'someElement1', 'anotherElement1' ], wantThisAsKey2: [ 'someElement2', 'anotherElement2' ] }