如何操作数组

Question

var arr = [{1:1,2:2,3:3,4:4},{1:1,2:2,3:3,4:4},{1:1,2:2,3:3,4:4},{1:1,2:2,3:3,4:4}]

这种格式数组如何改成

[1,1,1,1],
[2,3,2,2],
[3,3,3,3],
[4,4,4,4],

第一个数组取第一个数组对象的值以此类推

Answer 1

var arr = [{1:1,2:2,3:3,4:4},{1:1,2:2,3:3,4:4},{1:1,2:2,3:3,4:4},{1:1,2:2,3:3,4:4}]

var l = arr.map(v => Object.values(v))

console.log(l)

------------------------好像看错题了-----------------------

  var arr = [{ 1: 1, 2: 2, 3: 3, 4: 4 }, { 1: 1, 2: 2, 3: 3, 4: 4 }, { 1: 1, 2: 2, 3: 3, 4: 4 }, { 1: 1, 2: 2, 3: 3, 4: 4 }]


  var l = arr.map((v, i) => {
    const f = []
    for (let b = 0; b < arr.length; b++) {
      f.push(Object.values(arr[b])[i])
    }
    return f
  })

  console.log(l)

Answer 2

let filter=arr.map(n=>Object.values(n))

Answer 3

var arr = [{1:1,2:2,3:3,4:4},{1:1,2:2,3:3,4:4},{1:1,2:2,3:3,4:4},{1:1,2:2,3:3,4:4}]
Object.values(arr.reduce((acc,cur)=>(Object.entries(cur).forEach(([key,val])=>((acc[key]||=[]).push(val))),acc),{}));

输出
0: (4) [1, 1, 1, 1]
1: (4) [2, 2, 2, 2]
2: (4) [3, 3, 3, 3]
3: (4) [4, 4, 4, 4]