[pi3ce]

I would not call it challenging, but it was a fun and interesting experience. Learning functional programming through the CS 3110 course at Cornell University Here is the link: https://courses.cs.cornell.edu/cs3110/2021sp/textbook/

The OCaml part is free, well structured and does not take long to complete.

[a_tartaruga]

This class was so fun. I remember a lot of people did find it difficult too.

[alabhyajindal]

I'm taking this right now. Super fun!