in reply to Extending a perl program with Scheme, Lua, or JS

He! CPAN is magic 😎 See also Tk::Calculator::RPN::HP. I don‘t know if this module is good or useful for you. Regards, Karl

«The Crux of the Biscuit is the Apostrophe»

perl -MCrypt::CBC -E 'say Crypt::CBC->new(-key=>'kgb',-cipher=>"Blowfish")->decrypt_hex($ENV{KARL});'Help