將一個數組值復制到其他數組值

Question

我下面有JSON數組。 我想為dayOfWeek設置schedules ，而其他rooms的schedules中沒有這些schedules

const data = {
  rooms: [
    {
      roomId: 1,
      schedules: []
    },
    {
      roomId: 2,
      schedules: [
        { home1: "05:05", dayOfWeek: 1, away: "20:30" },
        { home1: "06:05", dayOfWeek: 5, away: "21:30" },
        { home1: "07:05", dayOfWeek: 7, away: "22:30" }
      ]
    },
    {
      roomId: 3,
      schedules: []
    }
  ]
}

我也需要將相同的時間表復制到其他房間。

預期產量

const finalArray = [
  { home1: "05:05", dayOfWeek: 1, away: "20:30", roomId: 1 }, //schedules from room2
  { home1: "06:05", dayOfWeek: 5, away: "21:30", roomId: 1 }, //schedules from room2
  { home1: "07:05", dayOfWeek: 7, away: "22:30", roomId: 1 }, //schedules from room2 

  { home1: "05:05", dayOfWeek: 1, away: "20:30", roomId: 3 }, //schedules from room2
  { home1: "06:05", dayOfWeek: 5, away: "21:30", roomId: 3 }, //schedules from room2
  { home1: "07:05", dayOfWeek: 7, away: "22:30", roomId: 3 }, //schedules from room2 
]

我已經嘗試過，但是無法正常工作！！！ 請幫忙！！！

Answer 1

您可以首先找到source of truth room的source of truth room然后使用Array.reduce將時間表提取/復制到其他時間表：

 const data = { rooms: [ { roomId: 1, schedules: [] }, { roomId: 2, schedules: [ { home1: "05:05", dayOfWeek: 1, away: "20:30" }, { home1: "06:05", dayOfWeek: 5, away: "21:30" }, { home1: "07:05", dayOfWeek: 7, away: "22:30" } ] }, { roomId: 3, schedules: [] } ] } const theRoom = data.rooms.find(x => x.schedules.length) const result = data.rooms.reduce((r,{roomId, schedules}) => { if(roomId != theRoom.roomId) r.push(...theRoom.schedules.map(x => ({ roomId, ...x }))) return r }, []) console.log(result) 

Answer 2

只需遍歷數組。

編輯：通過評論編輯

 const data = { rooms: [ { roomId: 1, schedules: [] }, { roomId: 2, schedules: [ { home1: "05:05", dayOfWeek: 1, away: "20:30" }, { home1: "06:05", dayOfWeek: 5, away: "21:30" }, { home1: "07:05", dayOfWeek: 7, away: "22:30" } ] }, { roomId: 3, schedules: [] } ] } var roomIdWithSchedules = null; var schedulesOfRoomWithRoomIdWithSchedules = []; for(var i = 0; i < data.rooms.length; i++) { if(data.rooms[i].schedules && data.rooms[i].schedules.length) { roomIdWithSchedules = data.rooms[i].roomId; schedulesOfRoomWithRoomIdWithSchedules = data.rooms[i].schedules.map(function(x) { return JSON.parse(JSON.stringify(x)); }); break; } } var finalArray = []; if(roomIdWithSchedules != null) { for(var i = 0; i < data.rooms.length; i++) { if(roomIdWithSchedules === data.rooms[i].roomId) { continue; } for(var j = 0; j < schedulesOfRoomWithRoomIdWithSchedules.length; j++) { var item = JSON.parse(JSON.stringify(schedulesOfRoomWithRoomIdWithSchedules[j])); item.roomId = data.rooms[i].roomId; finalArray.push(item) } } } console.log(finalArray); 

Answer 3

如果您只是要將其放入新數組中，請執行以下操作：

var schedular = data.rooms[1].schedules