JavaScript में जटिल ऐरे ग्रुपिंग

मान लीजिए हमारे पास ऑब्जेक्ट्स का एक ऐरे है जैसे कि -

const arr = [   {userId: "3t5bsFB4PJmA3oTnm", from: 1, to: 6},   {userId: "3t5bsFB4PJmA3oTnm", from: 7, to: 15},   {userId: "3t5bsFB4PJmA3oTnm", from: 172, to: 181},   {userId: "3t5bsFB4PJmA3oTnm", from: 182, to: 190} ];

हमें एक JavaScript फ़ंक्शन लिखना है जो ऐसा ऐरे लेता है। फ़ंक्शन को ओवरलैपिंग ऑब्जेक्ट्स को उनकी "from" और "to" प्रॉपर्टी के आधार पर एक सिंगल ऑब्जेक्ट में ग्रुप करना चाहिए जैसे कि -

const output = [   {userId: "3t5bsFB4PJmA3oTnm", from: 1, to: 15},   {userId: "3t5bsFB4PJmA3oTnm", from: 172, to: 190} ];

उदाहरण

const arr = [   {userId: "3t5bsFB4PJmA3oTnm", from: 1, to: 6},   {userId: "3t5bsFB4PJmA3oTnm", from: 7, to: 15},   {userId: "3t5bsFB4PJmA3oTnm", from: 172, to: 181},   {userId: "3t5bsFB4PJmA3oTnm", from: 182, to: 190} ]; const groupByDuration = (arr = []) => {   const result = arr.reduce((acc, val) => {     let last = acc[acc.length - 1] || {};     if (last.userId === val.userId && last.to + 1 === val.from) {       last.to = val.to;     } else {         acc.push({ userId: val.userId, from: val.from, to: val.to });     }     return acc;   }, []);   return result; } console.log(groupByDuration(arr));

आउटपुट

कंसोल में आउटपुट होगा -

[   { userId: '3t5bsFB4PJmA3oTnm', from: 1, to: 15 },   { userId: '3t5bsFB4PJmA3oTnm', from: 172, to: 190 } ]