javascript - 在javascript中转换对象数组

Question

我是 JS 的新手，希望你能帮助我)我需要以这种方式转换对象数组:

const arr = [
  {id: 'key1', value: 1 },
  {id: 'key2', value: [1,2,3,4]}
 ...
]
const transformedArr = [
   {key1: 1},
   {key2: 1},
   {key2: 2},
   {key2: 3},
   {key2: 4},
   ....
 ]

我该怎么做？

Answer 1

因为你是 JS 新手..

带有 for 循环的好旧 JS 可能对您来说很容易理解

const arr = [
  {id: 'key1', value: 1 },
  {id: 'key2', value: [1,2,3,4]}
]

const transformedArr  =[]


for(var i = 0 ; i < (arr.length); i++){

   var valArr = arr[i].value

   if( Array.isArray(valArr) ){ // to check if the value part is an array

      for(var j=0 ; j < valArr.length ; j++){

        transformedArr.push({id: arr[i].id,value:valArr[j] })

      }

   }else{

     transformedArr.push({id: arr[i].id,value:valArr })

   }

}

console.log(transformedArr)