删除数组中的 JSON 数据

Question

我正在尝试从 JSON 数组中删除一段数据。比如我有这个数组；

var users = [];
io.on('connection',function(socket){
   socket.on('nickname', function(nick){
      socket.nick = nick;
       users.push({
         user:socket.nick,
         userid:socket.id,
         socket:socket
       });
    });

我正在尝试以这种方式删除用户；

socket.on('disconnect', function(){
    delete users[{
        user,
        userid,
        socket
    }];
   });
 });

我该怎么做？

Answer 1

您可以尝试使用 lodash 方法来实现您的目标：-

var _ = require('lodash');
socket.on('disconnect', function(){
        _.pullAllWith(users, [{
             user:socket.nick,
             userid:socket.id,
             socket:socket
             }], _.isEqual)
       });
     });

看看这是否有效..

Answer 2

如果你知道每个用户对象的每个属性的值，你可以将值传递给一个函数并循环遍历用户数组以找到匹配的对象，然后从数组中拼接它（更新答案传递在对象到函数中）：

var users = [];
for (var i = 1; i < 10; i++) {
  users.push({
    user: i,
    userId: i,
    socket: i
  });
}

/**
 * Loop through the users array to find matching 
 * object to remove
 **/
var deleteUser = function(userToDelete) {
  for (var userObj in users) {
    var userObject = users[userObj];
    if (typeof userObject === "object" &&
      userObject.user === userToDelete.user &&
      userObject.userId === userToDelete.userId &&
      userObject.socket === userToDelete.socket) {
      users.splice(userObj, 1);
      break;
    }
  }
  console.log(users);
};

deleteUser({
  user: 2,
  userId: 2,
  socket: 2
});