I have not been on this site for a bit. I was visiting today and have a few questions: 
 
1. I have a friend who is new to sas programming but he is not getting challenged at his sas job. He asked me today for advice on how gain better programming experiences. He's a statistical programmer and has aspiration to be a biostatistical programmer eventually. He works for a Contract Research Organization (CRO). 
 
Initially, I thought SAS had programming challenges but I couldn't find them.  I think I personally attended one once during a sas forum a few years ago. 
 
Does SAS have plans for quarterly programming challenges for the community? 
 
2. Also, He wanted to search the SAS papers for programming tips but I couldn't find a place with everything. Also, I need to find any papers related to Digital Twins.
 
Any help for these two questions? Thanks in advance.