bqn-libs VS ngn-k-tutorial

Languages with multidimensional arrays (APL, BQN, J, but not K) have trouble with dicts because an index into an array is a list of numbers, and an index into a dict is an arbitrary value. Many primitives, and especially selection, are designed around lists of numbers and don't transfer to dicts. In K, where the index into a list is one number, there's still a requirement that the keys in a dict all have the same level of nesting, but this isn't bad in practice. BQN will eventually have hashmaps implemented as in a more mainstream/conventional way, as objects. There's a model at https://github.com/mlochbaum/bqn-libs/blob/master/hashmap.bq... .

I don't think studying the compiler is a very good way to learn BQN, but I would like to write up parts of it (limited by time and motivation of course). I did some chat sessions on this sort of compilation during early development; see the links at the bottom of https://mlochbaum.github.io/BQN/implementation/ .

Complain about the language or documentation, but array language communities are absolutely friendly to outsiders! This tutorial lists some active forums, give them a try:

https://github.com/razetime/ngn-k-tutorial/tree/main?tab=rea...

Also, have to shout out the APL Orchard, where Adám will give any visitor a personal tutorial: https://chat.stackexchange.com/rooms/52405/the-apl-orchard

To add to the list, this one is pretty good;

https://github.com/razetime/ngn-k-tutorial

If you like APL, then you probably want to try K, which is an ASCII-only array language with a focus on guided minimalism. For an open source K you can try ngn/k, which has a tutorial.

Razetime's matmul refactoring is brilliant: https://github.com/razetime/ngn-k-tutorial/blob/main/c-think...

Finally, some nice examples of k's concision:

  qs:{$[2>#?x;x;,/qs'x@&'~\:x<*1?x]}    / Quicksort