Playing around with reserved words. Ruby doesn't seem to care.

no-reserved-words.rb

#!/usr/bin/env ruby -w

class O
  def yield
    puts "Yielded."
  end
  def do
    puts "Doing."
  end
  def def
    puts "Deffing."
  end
  def end
    puts "Ending."
  end
  def return
    puts "Returning."
  end
  def loop
    puts "Looping."
  end
end

O.new.yield
O.new.do
O.new.def
O.new.end
O.new.return
O.new.loop