Question

在以下数据中。我想给它一个带有一些值作为键的对象，像这样：

从此处：链接到整个数据HERE（this.localObject）

const employees = [{
    "EmployeeID": "100A",
    "FirstName": "Downs",
    "aval": [
       {"start": "11-19", "end": "2", "ava": "30", "health": "4"},
       {"start": "11-20", "end": "2", "ava": "40", "health": "4"},
       {"start": "11-21", "end": "2", "ava": "50", "health": "4"},
       {"start": "11-22", "end": "2", "ava": "60", "health": "4"}
    ]
  },
  {
    "EmployeeID": "100B",
    "FirstName": "Mckenzie",
    "aval": [
       {"start": "11-19", "end": "2", "ava": "1", "health": "4"},
       {"start": "11-20", "end": "2", "ava": "2", "health": "4"},
       {"start": "11-21", "end": "2", "ava": "3", "health": "4"},
       {"start": "11-22", "end": "2", "ava": "4", "health": "4"}
    ]
  },
]

此处：

const employees = [
   { "EmployeeID": "100A", "11-19": "30"},
   { "EmployeeID": "100A", "11-20": "40"},
   { "EmployeeID": "100A", "11-21": "50"},
   { "EmployeeID": "100A", "11-22": "60"},
   { "EmployeeID": "100B", "11-19": "1"},
   { "EmployeeID": "100B", "11-20": "2"},
   { "EmployeeID": "100B", "11-21": "3"},
   { "EmployeeID": "100B", "11-22": "4"}
]

//and so on...

到目前为止，我已经尝试过：

this.localData = this.localObject.employees;
const firstLevel = this.localData.map(x => x.aval);

firsLevel将为我提供一个与我需要的对象更接近的对象数组，现在我需要将“开始” 值作为键，并将“ ava” 在自己的对象容器中将value作为value属性

Answer 1

您还需要迭代内部数组并构建一个数组。

var array = [{ EmployeeID: "100A", FirstName: "Downs", aval: [{ start: "11-19", end: "2", ava: "30", health: "4" }, { start: "11-20", end: "2", ava: "40", health: "4" }, { start: "11-21", end: "2", ava: "50", health: "4" }, { start: "11-22", end: "2", ava: "60", health: "4" }] }, { EmployeeID: "100B", FirstName: "Mckenzie", aval: [{ start: "11-19", end: "2", ava: "1", health: "4" }, { start: "11-20", end: "2", ava: "2", health: "4" }, { start: "11-21", end: "2", ava: "3", health: "4" }, { start: "11-22", end: "2", ava: "4", health: "4" }] }],
    result = array.reduce((r, { EmployeeID, aval }) => [
        ...r,
        ...aval.map(({ start, ava }) => ({ EmployeeID, [start]: ava }))
    ], []);

console.log(result);

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Answer 2

您可以使用Array.flatMap并像下面这样使用aval遍历其中的Array.map

const employees = [{
    "EmployeeID": "100A",
    "FirstName": "Downs",
    "aval": [
       {"start": "11-19", "end": "2", "ava": "30", "health": "4"},
       {"start": "11-20", "end": "2", "ava": "40", "health": "4"},
       {"start": "11-21", "end": "2", "ava": "50", "health": "4"},
       {"start": "11-22", "end": "2", "ava": "60", "health": "4"}
    ]
  },
  {
    "EmployeeID": "100B",
    "FirstName": "Mckenzie",
    "aval": [
       {"start": "11-19", "end": "2", "ava": "1", "health": "4"},
       {"start": "11-20", "end": "2", "ava": "2", "health": "4"},
       {"start": "11-21", "end": "2", "ava": "3", "health": "4"},
       {"start": "11-22", "end": "2", "ava": "4", "health": "4"}
    ]
  },
]

let res = employees.flatMap(({ EmployeeID, aval }) => 
                    aval.map(({ start, ava }) => ({ EmployeeID, [start]: ava })))

console.log(res)

转换嵌套数组->数组->对象到数组->对象=>对象值：对象值

2 个答案: