在反應中將對象數組轉換為數組

Question

在反應中將對象數組轉換為數組

[{id: 1, Tag_name: "larvel"}, {id: 2, Tag_name: "CSs"},{id:4},{id:5}]

我想要這個輸出

["1","2","4","5"]

請幫助我

Answer 1

您可以使用Array.prototype.map

[{id: 1, Tag_name: "larvel"}, {id: 2, Tag_name: "CSs"},{id:4},{id:5}].map((e) => e.id.toString())

Answer 2

您可以使用Array.prototype.map() ：

map()方法創建一個新數組，其中填充了對調用數組中的每個元素調用提供的函數的結果。

 const array = [{id: 1, Tag_name: "larvel"}, {id: 2, Tag_name: "CSs"},{id:4},{id:5}]; const result = array.map(item => item.id.toString()); console.log(result); // prints ["1","2","4","5"] to the console

Answer 3

const arr = [{id: 1, Tag_name: "larvel"}, {id: 2, Tag_name: "CSs"},{id:4},{id:5}]

let newArr = []

arr.forEach((item)=> {

 newArr.push(item.id.toString())

})

Answer 4

const arr = [{id: 1, Tag_name: "larvel"}, {id: 2, Tag_name: "CSs"},{id:4},{id:5}].map(item => item.id.toString());

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