将带有对象的数组转换为数组

Question

{"result":[{"id":1,"currency":"USD"},{"id":2,"currency":"PLN"},{"id":3,"currency":"EUR"}],"success":true}

我想拥有一个只有id的数组：

[1, 2, 3]

Answer 1

let data = {result":[{"id":1,"currency":"USD"},{"id":2,"currency":"PLN"},{"id":3,"currency":"EUR"}],"success":true};

let ids = data.result.map(item => item.id);

在这里有效

Answer 2

您可以使用array#map

var arr = {"result":[{"id":1,"currency":"USD"},{"id":2,"currency":"PLN"},{"id":3,"currency":"EUR"}],"success":true};

console.log(arr['result'].map(a=>a.id))