Question

这是我的第一个数组。

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

这是我的第二个数组。

{
  "symptoms": [
    "N",
    "N",
    "Y"
  ]
}

这两个数组需要组合才能得到。

[
  {
    "id": 8651,
    "value": "Abdominal pain",
    "result": "N"
  },
  {
    "id": 8646,
    "value": "Chest pain",
    "result": "N"
  },
  {
    "id": 8642,
    "value": "Cough",
    "result": "Y"
  }
]

如何实现这一目标。用reduce＆concat尝试过，我没有得到想要的结果

Answer 1

您可以使用map函数来做到这一点：

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

var symptoms = {
  "symptoms": [
    "N",
    "N",
    "Y"
  ]
}

const mapFunction = (dataItem, index) => ({...dataItem, "result": symptoms.symptoms[index]});
const mappedResult = data.map(mapFunction)

console.log(mappedResult)

Answer 2

这应该对您有帮助。

ng serve --configuration es5

Answer 3

您可以为此使用 map 运算符。

import { map } from 'rxjs/operators';
    
let newArr = [];

data.map((item, index) => {
  newArr.push(data[index]);
  newArr[index]['result'] = symptoms[index];
});

将列表追加到另一个列表

3 个答案: