Intro/sample script for rprb (aka Reverse Polish RuBy)
{ Kernel swap puts drop } :say sto { "Enter to continue..." say gets drop } :pause sto
basic RPN stuff
1 1 + p 2 * p pause
basic Ruby stuff
zero? p 0 zero? p Array.new 1 push p clr pause
obviously, lines starting with # are ignored, but also..
<<proc { puts "hi!" } call pause
like Lisp, we have a "read" function
"1 1 +" read p
which is equivalent to
{ 1 1 + } p pause
and an "eval" function to evaluate the results
eval p clr pause
and an "evaln" function to evaluate n times
{ 1 1 + } 5 dupn 5 evaln p clr
we have registers..
1 :a sto p :a rcl p
registers store our functions
:drop rcl p { dup2 + } :fib sto 0 1 fib p
exen executes multiple times
:fib 5 exen
which is equivalent to
:fib rcl 5 evaln