What is the better way to remove the "parent index of" of an array?

Question

What is the better way to remove the "parent index of" of an array?

enter code hereIm making an nodejs application... let me show my question;;

//id = dinamic string.. "user1", "user2", "userX"  
usersArray = [];
usersArray[id]["socket"] = socket;

When sockets ends, I want to remove [id] from usersArray.. but at this time id is not availabe

socket.on('end', function () {
    ?........?
    socket.end();
});

How to do it?

javascript
node.js

Answer 1

There's socket.id which works well as an identifier for each socket. Then, you can use an associative array instead of usersArray:

var usersArray = {};
usersArray[socket.id] = some_user_data;

You can then remove this entry using delete usersArray[socket.id].

Answer 2

Assuming you have access to thisId from inside the socket.on('end') function, you could do something like:

socket.on('end', function () {
    usersArray.splice(thisId, 1);
    socket.end();
});

Answer 3

Depending on where you add the sockets to your userArray (which seems to be an object rather than an array noticing your examples for id), you could consider just adding a new callback to the socket when you add it to the array

usersArray[someId].socket = socket;

// New callback to just delete the usersArray entry
usersArray[someId].socket.on('end', function() {
   delete usersArray[someId];
});

Leave the current socket.on untouched:

socket.on('end', function () {
    /* No new code here, as the deletion happens
       when the socket is added to usersArray!
     */
    socket.end();
});