On a problem of js data structure Transformation

there is a comment scenario where id is unique, answerId and id correspond, and answerId is the person who replied to id. You need to convert COMMENT_MOCK_DATA_ORIGIN data into result data structure, which is equivalent to an additional field answerArr into a reply array.

var COMMENT_MOCK_DATA_ORIGIN = [
    {
      "id": 52,
      "a_id": 205,
      "user": "3",
      "website": "",
      "msg": "",
      "createTime": "1533303716",
      answerId:""
    },
    {
      "id": 54,
      "a_id": 205,
      "user": "5",
      "website": "",
      "msg": "",
      "createTime": "1533303716",
      answerId: 52
    },
    {
      "id": 55,
      "a_id": 205,
      "user": "5",
      "website": "",
      "msg": "",
      "createTime": "1533303716",
      answerId: 52
    },
    {
      "id": 51,
      "a_id": 205,
      "user": "2",
      "website": "",
      "msg": "",
      "createTime": "1533303713",
      answerId: 56
    },
    {
      "id": 56,
      "a_id": 205,
      "user": "2",
      "website": "",
      "msg": "",
      "createTime": "1533303713",
      answerId:""
    },
    {
      "id": 57,
      "a_id": 205,
      "user": "2",
      "website": "",
      "msg": "",
      "createTime": "1533303713",
      answerId:""
    },
  ]

 var result = [{
    "id": 52,
    "a_id": 205,
    "user": "3",
    "website": "",
    "msg": "",
    "createTime": "1533303716",
    "answerId": "",
    "answerArr": [{
      "id": 54,
      "a_id": 205,
      "user": "5",
      "website": "",
      "msg": "",
      "createTime": "1533303716",
      "answerId": 52
    }, 
      {"id": 55, "a_id": 205, "user": "5", "website": "", "msg": "", "createTime": "1533303716", "answerId": 52}
      ]
  }, {
    "id": 56,
    "a_id": 205,
    "user": "2",
    "website": "",
    "msg": "",
    "createTime": "1533303713",
    "answerId": "",
    "answerArr": [{
      "id": 51,
      "a_id": 205,
      "user": "2",
      "website": "",
      "msg": "",
      "createTime": "1533303713",
      "answerId": 56
    }]
  }, {"id": 57, "a_id": 205, "user": "2", "website": "", "msg": "", "createTime": "1533303713", "answerId": ""}]

the environmental background of the problems and what methods you have tried

related codes

/ / Please paste the code text below (do not replace the code with pictures)

what result do you expect? What is the error message actually seen?

const getMyCommenData=(COMMENT_MOCK_DATA_ORIGIN)=> { let mapping = {answerId: []} let grande_one = COMMENT_MOCK_DATA_ORIGIN.filter(v => { let {answerId = ''} = v; if (answerId) { mapping[answerId] = [] } return answerId === '' || answerId==null||answerId===0; }) COMMENT_MOCK_DATA_ORIGIN.forEach(v => { let {answerId = ''} = v; if (answerId in mapping) { mapping[answerId].push(v) } }) return grande_one.map(v => { let {id} = v; if (id in mapping) { v.answerArr = mapping[id] } return v; }); }