#---
# Excerpted from "Programming Ruby 1.9",
# published by The Pragmatic Bookshelf.
# Copyrights apply to this code. It may not be used to create training material, 
# courses, books, articles, and the like. Contact us if you are in doubt.
# We make no guarantees that this code is fit for any purpose. 
# Visit http://www.pragmaticprogrammer.com/titles/ruby3 for more book information.
#---
def who_says_what
  yield("Dave", "hello")
  yield("Andy", "goodbye")
end
  
who_says_what {|person, phrase| puts "#{person} says #{phrase}"}
