Hi, I like to know what's wrong with this http://scratch.mit.edu/projects/113447052 it doesn't work perfectly sometimes it just gets errors, added then deleted then added then deleted, I tried run without screen refresh but it doesn't work
Please help.

Nobody replies

What's wrong with it?

zp100 wrote:

What's wrong with it?

The problem is when I log in 2 accounts it says “1 user(s) online” then 2 then 1 it switching quickly and I got confused, why not do it again to see what happens, wait

ProjectMaker59 wrote:

zp100 wrote:

What's wrong with it?

The problem is when I log in 2 accounts it says “1 user(s) online” then 2 then 1 it switching quickly and I got confused, why not do it again to see what happens, wait

I'm on the project right now on a different webpage. You run the project, and I'll see what happens.

Wait, I keep seeing your name flash on and then disappear. This is too complicated for me to understand, but maybe somewhere it only lets one person on the list at a time…

Bring up my post, Anyone?

Your upload and download are named the wrong way round! The ‘upload’ is taking the cloud variable and loading it into the local list and the ‘download’ takes the local list and saves it to the cloud.

So your Load script is running in a loop because of the forever loop and is doing this

take the cloud data and expand to a list
add the local user to the list
store the list to the cloud
clear the cloud variable
repeat

Think that through and you should see the problem.

deck26 wrote:

.
So your Load script is running in a loop because of the forever loop and is doing this

take the cloud data and expand to a list
add the local user to the list
store the list to the cloud
clear the cloud variable
repeat

Think that through and you should see the problem.

I am thinking that through and I can't see the problem, Please tell me What do I do wrong?

So what's the last thing you do before you repeat the loop (I know I may have omitted other thngs which aren't relevant). You clear the cloud variable and then try to expand it to a list which will always be empty, you add your own username and store that to the cloud before clearing it again.

So the most the cloud variable can hold at any time, and only very briefly, is a single username.

deck26 wrote:

So what's the last thing you do before you repeat the loop (I know I may have omitted other thngs which aren't relevant). You clear the cloud variable and then try to expand it to a list which will always be empty, you add your own username and store that to the cloud before clearing it again.

So the most the cloud variable can hold at any time, and only very briefly, is a single username.

Hi, I really got confused what to do, can you remix to solve the problem?

I'm trying to think of a method like this but haven't managed to do so thus far.

Let's assume you have two users A and B. We can't rely on A deleting A from the list when they disconnect so B has to remove A and vice versa.

So we get A to remove B from the list and B has to add itself back on reasonably quickly if still connected. But B is also removing A regularly so A has to keep adding itself. If these two processes are happening at the same rate nothing is ever stable enough to ensure either A or B knows the other is connected. This only gets more complicated as the number of connected users increases!

These are the issues. I'm still pondering it.

bruh its simple as move 2 steps block.
You looping script where it clears cloud var so it will show name of the user that ran it latest.

I can help if you need help. You using hacked blocks for nothing. You can do it without them. Also i will make a new project just to help you and link it in 10 min.

Arcum wrote:

https://scratch.mit.edu/projects/113351726/

Hi, I'm very Sorry It doesn't help me, I'm trying to make multiplayer game with “Usernames”.

You could try and make another cloud variable, which allocates two digits per user. When they are connected, they must change their pair by 1 at least every five seconds, but the script should do it every half a second, so that it accounts for five seconds of internet transfer time. When the pair of digits gets to “99” it should loop back to “01”. If, after five seconds, a user detects that the person has left, they should set a third variable to an encoded form of their username, and a fourth stating when they started (using the “days since 2000” block. If, after 5 seconds the inactive user is not removed, anther user will step in and do it.

Does that solve it?

jokebookservice1 wrote:

You could try and make another cloud variable, which allocates two digits per user. When they are connected, they must change their pair by 1 at least every five seconds, but the script should do it every half a second, so that it accounts for five seconds of internet transfer time. When the pair of digits gets to “99” it should loop back to “01”. If, after five seconds, a user detects that the person has left, they should set a third variable to an encoded form of their username, and a fourth stating when they started (using the “days since 2000” block. If, after 5 seconds the inactive user is not removed, anther user will step in and do it.

Does that solve it?

There are certainly alternative ways of doing it. My multiplayer basics demo for example. My point was that the method being used here wasn't going to work.

However there's always a risk with what you suggest that two players are in sync with each other so each time player A changes the variable player B changes it as well so it looks like only one is connected. That's why I'd always use one cloud variable per player. Each player is then in total control of one cloud var and a new player will only join if there's a spare. If the cloud var stores the username (encoded of course) and a constantly changing variable you can detect if they're still connected. There's no need to constantly decode the usernames, just check the last encoded versions with the current ones. The same cloud vars can be used for game data.

https://scratch.mit.edu/projects/98837341/#editor. Look at the third-to-last script in the Stage. Every second, it clears all the players from the list. If the players are still on, they'll immediately add their names back on. Hopefully this helps!

zp100 wrote:

https://scratch.mit.edu/projects/98837341/#editor. Look at the third-to-last script in the Stage. Every second, it clears all the players from the list. If the players are still on, they'll immediately add their names back on. Hopefully this helps!

Thanks it helps me bit, but I still need help