我在 Node.js 中有一個復雜的深度嵌套 JSON，我無法提取某些資料。我需要所有僅屬于專案的 id，我的問題是檔案夾也有一個 id 欄位，所以我不能只訪問專案中的 id。這是一個示例 json：
{
id: "0",
name: null,
parentId: null,
folderType: "chatCannedMessages",
folders: [
{
id: 3195588631115178,
name: "Testfolder",
parentId: null,
folderType: "chatCannedMessages",
folders: [
{
id: "3195588620182363",
name: "Subfolder",
parentId: "3195588631115178",
folderType: "chatCannedMessages",
folders: [
{
id: "3206824598737435",
name: "Interesting",
parentId: "3195588620182363",
folderType: "chatCannedMessages",
folders: [],
items: [
{
id: "3208409930553392",
name: "Canned Message",
folderId: "3206824598737435",
updated: "2022-05-27T07:28:40.450Z",
frontendFolderId: null,
text: "<p>This is an HTML with Image.</p>",
keywords: "test",
subject: "What kind of subject",
slashCommand: "test",
language: "en-US",
setupItemId: "3208409930553392",
},
],
},
],
items: [
{
id: "3195595211854821",
name: "Message in subfolder",
folderId: "3195588620182363",
updated: "2022-05-19T12:05:39.503Z",
frontendFolderId: null,
text: "Message in subfolder",
keywords: "test",
subject: "Message in subfolder",
slashCommand: "sub",
language: "bn-BD",
setupItemId: "3195595211854821",
},
],
},
],
items: [],
},
],
items: [
{
id: "2888102250465731",
name: "bye",
folderId: null,
updated: "2022-05-25T11:15:36.367Z",
frontendFolderId: null,
text: "Thanks for contacting us. Please do not hesitate to contact us again if we can be of further assistance.",
keywords: "bye",
subject: null,
slashCommand: null,
language: null,
setupItemId: "2888102250465731",
},
],
};
我想在這里實作的輸出是一個陣列，如下所示：
["3208409930553392", "3195595211854821", null]
uj5u.com熱心網友回復：
迭代它不是那么復雜的json。只是專案和檔案夾。
var obj={id:"0",name:null,parentId:null,folderType:"chatCannedMessages",folders:[{id:0xb5a5ef534b5aa,name:"Testfolder",parentId:null,folderType:"chatCannedMessages",folders:[{id:"3195588620182363",name:"Subfolder",parentId:"3195588631115178",folderType:"chatCannedMessages",folders:[{id:"3206824598737435",name:"Interesting",parentId:"3195588620182363",folderType:"chatCannedMessages",folders:[],items:[{id:"3208409930553392",name:"Canned Message",folderId:"3206824598737435",updated:"2022-05-27T07:28:40.450Z",frontendFolderId:null,text:"<p>This is an HTML with Image.</p>",keywords:"test",subject:"What kind of subject",slashCommand:"test",language:"en-US",setupItemId:"3208409930553392"},]},],items:[{id:"3195595211854821",name:"Message in subfolder",folderId:"3195588620182363",updated:"2022-05-19T12:05:39.503Z",frontendFolderId:null,text:"Message in subfolder",keywords:"test",subject:"Message in subfolder",slashCommand:"sub",language:"bn-BD",setupItemId:"3195595211854821"},]},],items:[]},],items:[{id:"2888102250465731",name:"bye",folderId:null,updated:"2022-05-25T11:15:36.367Z",frontendFolderId:null,text:"Thanks for contacting us. Please do not hesitate to contact us again if we can be of further assistance.",keywords:"bye",subject:null,slashCommand:null,language:null,setupItemId:"2888102250465731"},]};
result = [];
function iterate(obj) {
(obj.items || []).forEach(function(item) {
result.push(item.id)
});
(obj.folders || []).forEach(function(item) {
iterate(item)
});
}
iterate(obj);
console.log(result)uj5u.com熱心網友回復：
const data = {
id: "0",
name: null,
parentId: null,
folderType: "chatCannedMessages",
folders: [{
id: 3195588631115178,
name: "Testfolder",
parentId: null,
folderType: "chatCannedMessages",
folders: [{
id: "3195588620182363",
name: "Subfolder",
parentId: "3195588631115178",
folderType: "chatCannedMessages",
folders: [{
id: "3206824598737435",
name: "Interesting",
parentId: "3195588620182363",
folderType: "chatCannedMessages",
folders: [],
items: [{
id: "3208409930553392",
name: "Canned Message",
folderId: "3206824598737435",
updated: "2022-05-27T07:28:40.450Z",
frontendFolderId: null,
text: "<p>This is an HTML with Image.</p>",
keywords: "test",
subject: "What kind of subject",
slashCommand: "test",
language: "en-US",
setupItemId: "3208409930553392",
}, ],
}, ],
items: [{
id: "3195595211854821",
name: "Message in subfolder",
folderId: "3195588620182363",
updated: "2022-05-19T12:05:39.503Z",
frontendFolderId: null,
text: "Message in subfolder",
keywords: "test",
subject: "Message in subfolder",
slashCommand: "sub",
language: "bn-BD",
setupItemId: "3195595211854821",
}, ],
}, ],
items: [],
}, ],
items: [{
id: "2888102250465731",
name: "bye",
folderId: null,
updated: "2022-05-25T11:15:36.367Z",
frontendFolderId: null,
text: "Thanks for contacting us. Please do not hesitate to contact us again if we can be of further assistance.",
keywords: "bye",
subject: null,
slashCommand: null,
language: null,
setupItemId: "2888102250465731",
}, ],
};
const ids = []
function traverse(obj, parent) {
if (obj === null) return
if (Array.isArray(obj)) {
for (const item of obj) {
traverse(item, parent)
}
} else if (typeof obj === 'object') {
if (parent === 'items') {
ids.push(obj.id)
} else {
for (const [key, value] of Object.entries(obj)) {
traverse(value, key)
}
}
}
}
traverse(data, '')
console.log(ids)uj5u.com熱心網友回復：
您可以通過應用遞回邏輯來解決您的問題。模式是，如果最后一個后代物件是items，那么任何直接物件后代（可能在層次結構之間有陣列）都具有我們需要收集的 id
let input = {
items: [
{
id: 1,
foo: [
{
id: 2,
items: [
{
id: 3,
items: [
{
bar: [
{
id: 4
}
]
},
{
id: 5
}
]
}
]
}
]
}
]
}
let ids = [];
function getItemIDs(obj, wasItems = false) {
if (Array.isArray(obj) || (typeof obj === "object")) {
if (wasItems && (!Array.isArray(obj))) {
ids.push(obj.id);
}
for (let key in obj) {
if (Array.isArray(obj[key]) || (typeof obj[key] === "object")) {
getItemIDs(obj[key], (key === "items") || (wasItems && !Array.isArray(obj[key])))
}
}
}
}
getItemIDs(input);
console.log(ids);轉載請註明出處，本文鏈接：https://www.uj5u.com/qita/515678.html