xs is a dynamically typed, dynamically scoped, concatenative array language inspired by kdb+/q and released into the public domain. The interpreter and builtin functions are written in OCaml.

Source code: https://github.com/smabie/xs

Documentation: https://cryptm.org/xs/

Examples

Factorial

fac:(prod 1+til);

Fibonnaci

fib:(n:(neg 1)+;0@n do(2 enlist 1@x sum x~)[0 1]);