APL Quest
dyalog.com
dyalog.com
I had already done the first one but I am eager to dig in to all of these and learn the deep APL-Fu.
The array paradigm is so interesting and powerful even if you never take it further than looking at your other programming differently. Dyalog deserves a lot of respect for putting resources into educating people about it!
What an amazing feat. Thank you for the material and your perseverance Adám!