如何按字段名称列出 JavaScript 对象的属性

Question

我创建了这样一个对象：

[
  Object {
    Username = "James", Password = "12345", Email = "james@test.com"
  },
  Object {
    Username = "Auric", Password = "12345", Email = "auric@test.com"
  }
]

检索属性姓名列表的最佳方法是什么？即我想以一些变量 'keys' 结束，这样：

Object = ["james@test.com", "auric@test.com"]

谢谢。

Answer 1

您可以使用.map

var data = data.map(function (el) {
   return el.Email
})

Answer 2

你有一个对象数组，所以你需要遍历它然后 return 你需要的值。

    var myObjects = [
    {
    "Username" : "James", 
    "Password" : "12345", 
    "Email" : "james@test.com"
    },
  {
    "Username" : "Auric", 
    "Password" : "12345", 
    "Email" : "auric@test.com"
  }
];


function getProps (key) {
    var values = [];
    myObjects.forEach(function (obj){
      values.push(obj[key]);
    });
    return values;
}

console.log(getProps('Email'));

如何按字段名称列出 JavaScript 对象的属性

How to list the properties of a JavaScript object by field name

javascript

javascript-objects