javascript - ES6，返回一个对象数组以逗号分隔的字符串列表

Question

我有一些东西

var officers = [
  { id: 20, name: 'Captain Piett' },
  { id: 24, name: 'General Veers' },
  { id: 56, name: 'Admiral Ozzel' },
  { id: 88, name: 'Commander Jerjerrod' }
];

我需要返回 "20","24","56","88"

现在我在用

const ids = officers.map(officer => officer.id);

但它当然会返回一个数组。

什么是最有效的方法？

Answer 1

您可以使用 map()使用 "" 返回字符串数组，然后使用 join()

var officers = [
  { id: 20, name: 'Captain Piett' },
  { id: 24, name: 'General Veers' },
  { id: 56, name: 'Admiral Ozzel' },
  { id: 88, name: 'Commander Jerjerrod' }
];

const res = officers.map(x => `"${x.id}"`).join()

console.log(res)