객체 배열에서 객체 값을 키 / 값 쌍으로 바꿉니다.

질문

chartkick 사용에 관심이 있으므로 다음 형식으로 JS 객체를 변환해야합니다.

var array = [{date:'01/01/2017',value1:200,value2:300,value3:400}, {date:'02/01/2017',value1:220,value2:330,value3:430},{date:'03/01/2017',value1:250,value2:330,value3:420}]

다음 형식으로 :

var arrayOne = [{'01/01/2017': 200}, {'02/01/2017': 220},{'03/01/2017':250}]

어떤 도움이라도 대단히 감사하겠습니다.

답변1

Array.prototype.map ( ) :

const src = [{date:'01/01/2017',value1:200,value2:300,value3:400}, {date:'02/01/2017',value1:220,value2:330,value3:430},{date:'03/01/2017',value1:250,value2:330,value3:420}],

      result = src.map(({date,value1}) => ({[date]: value1}))
      
console.log(result)

.as-console-wrapper{min-height:100%;}

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답변2

이 시도:

 var array = [{date:'01/01/2017',value1:200,value2:300,value3:400}, {date:'02/01/2017',value1:220,value2:330,value3:430},{date:'03/01/2017',value1:250,value2:330,value3:420}]
 
let final_array =  array.map(arr => {
    return {[arr.date] : arr.value1};
 })

console.log(final_array)

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답변3

 var array = [{date:'01/01/2017',value1:200,value2:300,value3:400}, {date:'02/01/2017',value1:220,value2:330,value3:430},{date:'03/01/2017',value1:250,value2:330,value3:420}];
    var mappedArray = array.map(item => {
    return {
        [item.date]: item.value1
    }
})

배열을 반복하여 새 구조에 매핑

답변4

각 value1, value2, ...에 대해 루프에서 수행하려면

var array = [{
  date: '01/01/2017',
  value1: 200,
  value2: 300,
  value3: 400
}, {
  date: '02/01/2017',
  value1: 220,
  value2: 330,
  value3: 430
}, {
  date: '03/01/2017',
  value1: 250,
  value2: 330,
  value3: 420
}]

const numberOfValues = 3;

for (let i = 1; i <= numberOfValues; i++) {
  const mappedArray = array.map(x => {
    const result = {};
    result[x.date] = x["value" + i.toString()];
    return result;
  });
  console.log(mappedArray);
}

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답변5

해볼 수 있습니다.

let sampleArray = [{date:'01/01/2017',value1:200,value2:300,value3:400}, {date:'02/01/2017',value1:220,value2:330,value3:430},{date:'03/01/2017',value1:250,value2:330,value3:420}]


   let finalArray = sampleArray.map(data => ({[data.date]:data.value1}))

console.log(finalArray)

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출력 :

[{01/01/2017: 200},{02/01/2017: 220},{03/01/2017: 250}]

 

 

 

 

출처 : https://stackoverflow.com/questions/63246262/in-array-of-objects-turn-object-values-into-key-value-pair