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()将其转换为对象并使用for-loops进行了处理;
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"密钥名称之前选择房间名称：
"name": "roomName (PC)"
"name": "roomName (classroom)"
为了简单起见，我将JSON响应缩短了很多，但通常会有更多这些房间名称。我们的想法是从JSON响应体中获取所有房间名称并将它们推送到一个数组中，然后按照这样的顺序将它们打印出来;
roomName (PC)
roomName (classroom)
任何快速有效的方法吗？
答案 0 :(得分：4)
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);
答案 1 :(得分：2)
您可以先使用Array.prototype.forEach()对json.reservations数组进行迭代，然后再次r.resources进行迭代，如果满足表达式new RegExp(/roomName/, 'i').test(r.name)，则生成Array.prototype.push()
请注意，json数组中包含小写"name": "roomName (classroom)"和大写"name": "RoomName (PC)"，因此Regular Expression不会使用标记i检查区分大小写，最后RegExp.prototype.test()会检查roomName中是否有r.name。
代码：
var json = {"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": ""}]},
result = [],
regex = new RegExp(/roomName/, 'i');
json.reservations.forEach(function (r) {
r.resources.forEach(function (r) {
regex.test(r.name) && result.push({
name: r.name
});
});
})
console.log(result);.as-console-wrapper { max-height: 100% !important; top: 0; }
答案 2 :(得分：1)
你可以这样做：
{{1}}
答案 3 :(得分：0)
var jsonStr = "{ \"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\": \"\" } ] }";
var json = JSON.parse(jsonStr);
var array = [];
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 resource = json.reservations[i].resources[j];
if (resource.type === "room") {
if (array.indexOf("code")) {
array.push(resource.name);
}
}
}
}
}
console.log(array);
在控制台中输出。请检查..
（2）[＆＃34; RoomName（PC）＆＃34;，＆＃34; roomName（教室）＆＃34;] 0：＆＃34; RoomName（PC）＆＃34; 1：＆ ＃34; roomName（教室）＆＃34;长度：2__proto__：数组（0）