An implementation of the well-known bc, with Rubinius.
Almot like the regular bc:
λ make console
RUBYLIB=lib ruby -w bin/bc
bcinius Copyright (C) 2014 Franck Verrot <franck@verrot.fr>
This program comes with ABSOLUTELY NO WARRANTY; for details type `rake license'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `rake license' for details.
[Enter an expression and type enter. Ctrl-d to quit]
> 42*2
=> 84
> 42 + wat
=> Caught parsing error...
42 + wat
Error is here ~~~~~^
> [Ctrl-d]Quitting...GPLv3. Copyright 2014 - Franck Verrot.