將object里面的對象數組轉換成屬性數組

Question

我有一個 Object，它有一些像這樣的屬性：

obj1={
    "id": 2,
    "description": "",
    "operationIds": [
        {
            "id": 1,
            "name": "Standard"
        }
    ],
    "ratingIds": [
        {
            "id": 1,
            "name": "name1",
            "description": "",
        },
        {
            "id": 4,
            "name": "name4",
            "description": "",
        },
        {
            "id": 8,
            "name": "name8",
            "description": "",
        },
    ],
}

我想將 object 中的對象數組（ operationIds和ratingIds ）隱藏到屬性數組中，我收到這個 object 並且我想對其應用更改並提供另一種方法，因此它應該如下所示：

obj1={
    "id": 2,
    "description": "",
    "operationIds": [
        1
    ],
    "ratingIds": [
        1,
        4,
        8
    ],
    "timestamp": "AAAAAAAGJ6c=",
    "estimatedUtilReconciliationApplies": true
}

我能夠做到，但是以一種非常丑陋的方式，有沒有更簡單明了的方法來完成這個？

let x = {...obj} as any;
let ar1 = x.operationIds;
const arr1= ar1.map(function (obj) {
  return obj.id;
});

let ar2 = x.ratingIds;
const arr2= ar2.map(function (obj) {
  return obj.id;
});

x.operatingEnvironmentIds = arr1;
x.thrustRatingIds = arr2;

Answer 1

您可以使用傳播運算符和 map

 let obj1={ "id": 2, "description": "", "operationIds": [ { "id": 1, "name": "Standard" } ], "ratingIds": [ { "id": 1, "name": "name1", "description": "", }, { "id": 4, "name": "name4", "description": "", }, { "id": 8, "name": "name8", "description": "", }, ], } console.log({...obj1, operationIds:obj1.operationIds.map(elem => elem.id), ratingIds:obj1.ratingIds.map(elem => elem.id), })

作為 function

 let obj1={ "id": 2, "description": "", "operationIds": [ { "id": 1, "name": "Standard" } ], "ratingIds": [ { "id": 1, "name": "name1", "description": "", }, { "id": 4, "name": "name4", "description": "", }, { "id": 8, "name": "name8", "description": "", }, ], } let transform = (obj) => { return({...obj, operationIds:obj.operationIds.map(elem => elem.id), ratingIds:obj.ratingIds.map(elem => elem.id), }) } let transformed = transform(obj1) console.log(transformed)

Answer 2

我們循環數組並使用 Object.assign() 方法將對象數組轉換為單個 object。這會將每個 object 合並為一個結果 object。

Object.assign() 方法還將一個或多個對象的屬性合並到一個 object 中。