>>8
Post one of these exercises?
>>9
Lua is a small language. It doesn't lack documentation. Neither does Scheme actually, but one has to admit some Scheme's ecosystem are smallish.
Not quite CPAN but Chicken and Racket have enough libraries:
* http://wiki.call-cc.org/chicken-projects/egg-index-5.html
* https://pkgs.racket-lang.org/