javascript - 将字典键值添加到数组 [JavaScript]

Question

这是我在 JavaScript 中的数据结构示例:

var list = [{"username":"admin1"}, {"username":"admin2"}, {"username":"admin3"}, 
{"username":"admin4"}, {"username":"admin5"}];

如何将每个“用户名”添加到新数组 (var result = [])？

最终数据结构的示例将是:

var result = ["admin1", "admin2", "admin3", "admin4", "admin5"];

谢谢*

Answer 1

使用Array#map通过遍历元素生成数组的方法。

var list = [{"username":"admin1"}, {"username":"admin2"}, {"username":"admin3"}, 
{"username":"admin4"}, {"username":"admin5"}];

var res = list.map(function(o) {
  return o.username
});

console.log(res);

---

与 ES6 arrow function :

var list = [{"username":"admin1"}, {"username":"admin2"}, {"username":"admin3"}, 
{"username":"admin4"}, {"username":"admin5"}];

let res = list.map(o => o.username);

console.log(res);