JavaScript - 从 JSON 对象中选取特定数据

Question

我正在尝试从我的 JSON 响应中选择特定数据，如下所示；

{
   "status": "success",
   "reservations": [
      {
         "id": "26630",
         "subject": "Subject",
         "modifiedDate": "2017-05-16T06:05:12",
         "startDate": "2017-05-16T08:00:00",
         "endDate": "2017-05-16T09:45:00",
         "resources": [
            {
               "id": "2408",
               "type": "student_group",
               "code": "groupCode",
               "name": "groupName"
            },
            {
               "id": "3020",
               "type": "realization",
               "code": "realizationCode",
               "name": "realizationName"
            },
            {
               "id": "48",
               "type": "room",
               "code": "roomCode",
               "parent": {
                  "id": "2",
                  "type": "building",
                  "code": "buildingCode",
                  "name": "buildngName"
               },
               "name": "RoomName (PC)"
            }
         ],
         "description": ""
      },
      {
         "id": "21173",
         "subject": "subjectName",
         "modifiedDate": "2017-05-16T06:05:20",
         "startDate": "2017-05-16T08:00:00",
         "endDate": "2017-05-16T16:00:00",
         "resources": [
            {
               "id": "3115",
               "type": "realization",
               "code": "realizationCode",
               "name": "realizationName"
            },
            {
               "id": "2584",
               "type": "student_group",
               "code": "groupCode",
               "name": "groupName"
            },
            {
               "id": "52",
               "type": "room",
               "code": "roomCode",
               "parent": {
                  "id": "2",
                  "type": "building",
                  "code": "buildingCode",
                  "name": "buildingName"
               },
               "name": "roomName (classroom)"
            }
         ],
         "description": ""
      }
   ]
}

我已经使用 JSON.parse() 将其变成一个对象并使用 for-loops 遍历它；

var json = JSON.parse(data.responseText);

for (var i = 0; i < json.reservations.length; i++) {
    if (json.reservations[i].resources != null) {
        for (var j = 0; j < json.reservations[i].resources.length; j++) {

             var reservations = json.reservations[i];
             var resources = json.reservations[i].resources[j];  

         }                              
     }
}

所以我需要在 "description" key name 之前选择房间名称:

"name": "roomName (PC)"
"name": "roomName (classroom)"

为了简单起见，我将 JSON 响应缩短了很多，但通常会有更多这样的房间名称。这个想法是从 JSON 响应主体中获取所有房间名称，并将它们推送到一个数组中，然后像这样按顺序打印出来；

roomName (PC)
roomName (classroom)

有什么快速有效的方法吗？

Answer 1

你可以这样使用:

const arrays = json.reservations
  .filter(reservation => reservation.resources)
  .map(reservation =>
    reservation.resources.map(resource => resource.name)
  )
;

const names = [].concat.apply([], arrays);

数组展平取自这个问题:Merge/flatten an array of arrays in JavaScript?