Klong

"Klong is an array language, like K, but without the ambiguity. If you know K or APL, you may be disappointed by Klong. If you don't know any array languages, it might explode your brain. Use at your own risk!

A Klong program is a set of functions that use powerful operators to manipulate lists (vectors) and (multi-dimensional) arrays.

Note that Klong is a mathematical notation rather than a programming language. If you try to use it like your favorite OO/functional/procedural programming language, you will only get frustrated. 

The Reference Manual (klong-ref.txt) provides a complete and detailed semi-formal description of the Klong language. It is probably the best starting point for exploring Klong.

The Quick Reference (klong-qref.txt) summarizes the syntax and semantics of the language. It will probably only make sense if you already know K or APL.

Then there is a Really Short Introduction to Klong (klong-intro.txt), which you might want to read if you have never used an array language before."

http://t3x.org/klong/index.html

http://t3x.org/index.html