js列转行案例

const arr = [
  {
    orgId: '1628583017319727105',
    orgCode: '91110000100000489L',
    orgName: '集团',
    hiddenTroubleFindAmount: 12,
    hiddenTroubleRectifyAmount: 0,
    hiddenTroubleRectifyRate: 0,
    yearMonth: '2023-03-01',
    day: '1',
    orgSort: 1,
    idName: 'id'
  },
  {
    orgId: '1628583017319727105',
    orgCode: '91110000100000489L',
    orgName: '集团1',
    hiddenTroubleFindAmount: 7,
    hiddenTroubleRectifyAmount: 4,
    hiddenTroubleRectifyRate: 57.14,
    yearMonth: '2023-03-16',
    day: '16',
    orgSort: 1,
    idName: 'id'
  },
  {
    orgId: '1628583017319727105',
    orgCode: '91110000100000489L',
    orgName: '集团2',
    hiddenTroubleFindAmount: 7,
    hiddenTroubleRectifyAmount: 41,
    hiddenTroubleRectifyRate: 585.71,
    yearMonth: '2023-03',
    day: null,
    orgSort: 1,
    idName: 'id'
  },
  {
    orgId: '1628583017319727105',
    orgCode: '91110000100000489L',
    orgName: '集团3',
    hiddenTroubleFindAmount: 236,
    hiddenTroubleRectifyAmount: 104,
    hiddenTroubleRectifyRate: 44.07,
    yearMonth: null,
    day: null,
    orgSort: 1,
    idName: 'id'
  }
];
var result = {};
//1.循环遍历arr json串中的每一项
for (var i = 0; i < arr.length; i++) {
  //2.遍历每一项中的每个kv 
  for (var item in arr[i]) {
    //item代表arr json串中的每一项的key
    //3.根据key获取arr中每一行中的每个key,也就是item，
    //然后根据item从result中获取对应key的值,如果为空表示第一次进来
    var kv = result[item];
    if (kv) {
      //4.最终结果相同key的值存放到一个数组中
      kv.push(arr[i][item]);
    } else {
      //5.第一次存入时初始化key对应的数组
      result[item] = [];
      result[item].push(arr[i][item]);
    }
  }
}
console.log(result);