मान लीजिए, हमारे पास ऐसा ऑब्जेक्ट है -
const obj = { "firstName": "John", "lastName": "Green", "car.make": "Honda", "car.model": "Civic", "car.revisions.0.miles": 10150, "car.revisions.0.code": "REV01", "car.revisions.0.changes": "", "car.revisions.1.miles": 20021, "car.revisions.1.code": "REV02", "car.revisions.1.changes.0.type": "asthetic", "car.revisions.1.changes.0.desc": "Left tire cap", "car.revisions.1.changes.1.type": "mechanic", "car.revisions.1.changes.1.desc": "Engine pressure regulator", "visits.0.date": "2015-01-01", "visits.0.dealer": "DEAL-001", "visits.1.date": "2015-03-01", "visits.1.dealer": "DEAL-002" };हमें एक JavaScript फ़ंक्शन लिखना है जो ऐसा ऑब्जेक्ट लेता है और इसे नेस्टेड ऑब्जेक्ट्स और ऐरे में अनफ्लैट करता है।
इसलिए, उपरोक्त ऐरे के लिए आउटपुट इस तरह दिखना चाहिए -
const output = { firstName: 'John', lastName: 'Green', car: { make: 'Honda', model: 'Civic', revisions: [ { miles: 10150, code: 'REV01', changes: ''}, { miles: 20021, code: 'REV02', changes: [ { type: 'asthetic', desc: 'Left tire cap' }, { type: 'mechanic', desc: 'Engine pressure regulator' } ] ] }, visits: [ { date: '2015-01-01', dealer: 'DEAL-001' }, { date: '2015-03-01', dealer: 'DEAL-002' } ] };उदाहरण
const obj = { "firstName": "John", "lastName": "Green", "car.make": "Honda", "car.model": "Civic", "car.revisions.0.miles": 10150, "car.revisions.0.code": "REV01", "car.revisions.0.changes": "", "car.revisions.1.miles": 20021, "car.revisions.1.code": "REV02", "car.revisions.1.changes.0.type": "asthetic", "car.revisions.1.changes.0.desc": "Left tire cap", "car.revisions.1.changes.1.type": "mechanic", "car.revisions.1.changes.1.desc": "Engine pressure regulator", "visits.0.date": "2015-01-01", "visits.0.dealer": "DEAL-001", "visits.1.date": "2015-03-01", "visits.1.dealer": "DEAL-002" }; const unflatten = (obj = {}) => { const result = {}; let temp, substrings, property, i; for (property in obj) { substrings = property.split('.'); temp = result; for (i = 0; i < substrings.length - 1; i++) { if (!(substrings[i] in temp)) { if (isFinite(substrings[i + 1])) { temp[substrings[i]] = []; } else { temp[substrings[i]] = {}; } } temp = temp[substrings[i]]; } temp[substrings[substrings.length - 1]] = obj[property]; } return result; }; console.log(JSON.stringify(unflatten(obj), undefined, 4));आउटपुट
कंसोल में आउटपुट होगा -
{ "firstName": "John", "lastName": "Green", "car": { "make": "Honda", "model": "Civic", "revisions": [ { "miles": 10150, "code": "REV01", "changes": "" }, { "miles": 20021, "code": "REV02", "changes": [ { "type": "asthetic", "desc": "Left tire cap" }, { "type": "mechanic", "desc": "Engine pressure regulator" } ] } ] }, "visits": [ { "date": "2015-01-01", "dealer": "DEAL-001" }, { "date": "2015-03-01", "dealer": "DEAL-002" } ] } 
