Question

我有一个对象数组。我想获取键和值并打印数据。例如。我有ID，用户名和密码，我想要用户名和密码。

[
  {"id":1,"name":"admin","password":"admin","role":"Admin"},
  {"id":2,"name":"user","password":"user","role":"User"},
  {"id":3,"name":"superadmin","password":"superadmin","role":"superadmin"}
]

输出应为

name : admin
password : admin,
name : user
password : user,
name : superadmin
password : superadmin

Answer 1

let data = [
  {"id":1,"name":"admin","password":"admin","role":"Admin"},
  {"id":2,"name":"user","password":"user","role":"User"},
  {"id":3,"name":"superadmin","password":"superadmin","role":"superadmin"}
];

var out_data = data.reduce((a, b) => a + 'name: ' + b.name + ', password: ' + b.password + ' ', '');
console.log(out_data);

Answer 2

鉴于您拥有的数组，您只需要遍历它：

end if

Answer 3

var arr = [
  {"id":1,"name":"admin","password":"admin","role":"Admin"},
  {"id":2,"name":"user","password":"user","role":"User"},
  {"id":3,"name":"superadmin","password":"superadmin","role":"superadmin"}
]
[![enter image description here][1]][1]
Loop through the array
arr.forEach(function(data) {
  console.log('name', data.name);
  console.log('password', data.password);
})


  [1]: https://i.stack.imgur.com/uYA9i.png

Answer 4

To iterate key values dynamically, you have to iterate object.

    let arr = [
      {"id":1,"name":"admin","password":"admin","role":"Admin"},
      {"id":2,"name":"user","password":"user","role":"User"},
      {"id":3,"name":"superadmin","password":"superadmin","role":"superadmin"}
    ];

    arr.forEach((item, i) => {
       for(let key in item) {
           console.log(`${key}: ${item[key]}`);
       }
    });

If you would like to display only name and password, then you can add a condition.

arr.forEach((item, i) => {
   for(let key in item) {
      if (key === 'name' || key === "password") {
          console.log(`${key}: ${item[key]}`);
      }
   }
});

使用对象数组中的键和值进行打印

4 个答案: