Запуск потоков

Потоки реализуются с помощью класса Thread

#!/usr/bin/ruby

# Treads

n = %w(String1 String2 String3)

threads = []

c = 1
for i in n
    threads << Thread.new(i) { |str|
        # set thread variable
        Thread.current["counter"] = c
        sleep(rand(10));
        puts str
    }
    c += 1
end

# wait for threads
threads.each { |x|
    x.join
    puts "Done "<< x["counter"].to_s
}

# sleep(20);