合并基于通用ID的行数据

Question

我有一个JSON数据

let data = [
 { "Id": 1, "Name": "Test", "Datacol1": "1", "Datacol2": 0,"Datacol3": 0 },
 { "Id": 2, "Name": "Test123", "Datacol1": "1", "Datacol2": 2, "Datacol3": 0 },
 { "Id": 1, "Name": "Test", "Datacol1": "0", "Datacol2": 1, "Datacol3": 0 },
 { "Id": 1, "Name": "Test", "Datacol1": "0", "Datacol2": 0, "Datacol3": 2 }
]

我想合并数据并将其基于Id放入单行数据中，例如Output =

[{"Id":1,"Name":"Test","Datacol1":"1","Datacol2":1,"Datacol3":2}, 
 {"Id":2,"Name":"Test123","Datacol1":"1","Datacol2":2,"Datacol3":0}]

有人可以帮助我实现这一目标吗？

Answer 1

使用数组reduce和findIndex。在内部还原中，使用findIndex检查数组是否包含id匹配的对象。如果匹配，则检查其他任何键值是否为0。如果为零，则使用非零值进行更新。

let data = [{
    "Id": 1,
    "Name": "Test",
    "Datacol1": "1",
    "Datacol2": 0,
    "Datacol3": 0
  },
  {
    "Id": 2,
    "Name": "Test123",
    "Datacol1": "1",
    "Datacol2": 2,
    "Datacol3": 0
  },
  {
    "Id": 1,
    "Name": "Test",
    "Datacol1": "0",
    "Datacol2": 1,
    "Datacol3": 0
  },
  {
    "Id": 1,
    "Name": "Test",
    "Datacol1": "0",
    "Datacol2": 0,
    "Datacol3": 2
  }
]


let m = data.reduce(function(acc, curr) {
  let findId = acc.findIndex((item) => {
    return item.Id === curr.Id;
  });
  if (findId === -1) {
    acc.push(curr)
  } else {
    for (let keys in acc[findId]) {
      if (acc[findId][keys] === 0) {
        acc[findId][keys] = curr[keys]
      }
    }
  }
  return acc;

}, []);

console.log(m)