∑ Xah Lee 李杀 is a user on mstdn.io. You can follow them or interact with them if you have an account anywhere in the fediverse.
If you don't, you can sign up here.
collection of Programing Problems
http://xahlee.info/comp/programing_problems_index.html
use your fav lang, #JavaScript #python #ruby #golang #haskell
