Exemplo do uso de threads em Ruby.

ruby-thread.rb

#!/usr/bin/ruby
# Exemplo tirado de http://www.tutorialspoint.com/ruby/ruby_multithreading.htm

def func1
   i=0
   while i<=2
      sleep(2)
      puts "func1 at: #{Time.now}"
      i=i+1
   end
end

def func2
   j=0
   while j<=2
      sleep(1)
      puts "func2 at: #{Time.now}"
      j=j+1
   end
end

puts "Started At #{Time.now}"
t1=Thread.new{func1()}
t2=Thread.new{func2()}
t1.join
t2.join
puts "End at #{Time.now}"