Ruby REPL

I've been reading the Pragmatic Programmers Guide to Ruby, wishing I had a REPL, when I finally learned enough to write one. For the help of others and future experimentation I now present my Ruby REPL.

while true
  '> '.display
  gets.each do | e |
    puts(eval(e))
  end
end

Tags: programming, repl, ruby

Update: At the end of the book they talk about the interactive Ruby shell, irb. Now, why don't they mention this at the top of every chapter?!