Angular 通过比较两个列表获取值

需要比较两个ID，获取SympleValue并推入Symplesformarray

"partcipantData": [
    {
      "symptomId": 8651,
      "symptomValue": "N"
    },
    {
      "symptomId": 8646,
      "symptomValue": "N"
    },
    {
      "symptomId": 8642,
      "symptomValue": "N"
    }
]


var symptomsParams = [
  {
    "id": 8651,
    "value": "Abdominal pain"
  },
  {
    "id": 8646,
    "value": "Chest pain"
  },
  {
    "id": 8642,
    "value": "Cough"
  }
]

 this.symptomsParams.forEach(childObj =>{
              let val = this.partcipantData.filter(obj => obj.symptomId == childObj.id)
            
              this.symptomsFormArray.push(new FormControl(val.symptomValue))
              });
              

需要比较两个ID，获取SympleValue并推入Symplesformarray

"partcipantData": [
    {
      "symptomId": 8651,
      "symptomValue": "N"
    },
    {
      "symptomId": 8646,
      "symptomValue": "N"
    },
    {
      "symptomId": 8642,
      "symptomValue": "N"
    }
]


var symptomsParams = [
  {
    "id": 8651,
    "value": "Abdominal pain"
  },
  {
    "id": 8646,
    "value": "Chest pain"
  },
  {
    "id": 8642,
    "value": "Cough"
  }
]

 this.symptomsParams.forEach(childObj =>{
              let val = this.partcipantData.filter(obj => obj.symptomId == childObj.id)
            
              this.symptomsFormArray.push(new FormControl(val.symptomValue))
              });
              

---

在这里，val值总是返回未定义的值，有没有其他方法可以实现这一点？

假设您想从

SymplesParams

中筛选参与者数据，只需使用数组映射和筛选器

const-sparams=[
{
“症状ID”：8651，
“值”：“N”
},
{
“症状ID”：8646，
“值”：“N”
},
{
“症状ID”：8642，
“值”：“N”
}
];
const partcipantData=[
{
“id”：8651，
“价值”：“腹痛”
},
{
“id”：8646，
“价值”：“胸痛”
},
{
“id”：8642，
“值”：“咳嗽”
}
];
const sympleId=sympleSparams.map（s=>s.sympleId）；
const filteredSymptomValues=partcipantData
.filter（p=>symptomIds.includes（p.id））
.map（p=>p.value）；
log（filteredsymptomvalue）索引是否正确？它会导致错误的插入吗。因为它是分开做的。先取后取pushing@user630209它将按照
partcipantData
的顺序插入。这两个数组的顺序不一定相同。我没有确切地告诉您，首先它将根据症状ID SYMBOLSPARAMS筛选参与者数据，然后它将形成值数组。使用此值数组，您可以创建表单数组，array.filter将负责索引@user630209