While this may not be useful for day to day coding, if you plan on hacking Ruby itself or just are a very curious person, the following can be very interesting.
First, there's a way to dump the abstract syntax tree (AST) that Ruby creates while parsing your code:
ruby --dump parsetree file.rb
This can also be done programmatically:
require 'ripper' code = << EOC ... EOC Ripper.sexp(code)
Alternatively you can dump the instructions that can be generated for YARV (Yet Another Ruby VM):
ruby --dump insns file.rb
Or from inside Ruby: