Leo Ku

Will someone please tell me the difference between a set and unique_list?

Thanks,
Leo

My understanding is that when a user logs on, they are added to the online:users set. I don't know how to handle the following scenario:

• user signs in on one device
• then user signs in on another device
• then user logs out on the first device
• the :user_id would be removed from the online:users set
• now on the 2nd device, even though user is still signed in here, he wouldn't receive further notifications since his id has been removed from online:users set

How do you address this scenario?

Thanks