Simple Ruby multi-threading demo

go.rb

#!/usr/bin/env ruby
require 'thwait'

all = []
threads = []
5.times { |i|
  threads << Thread.new {
    sleep 2*rand
    all << i
    puts "Stored #{i}"
  }
}

puts "before join #{all.inspect}" # empty
ThreadsWait.all_waits(*threads) # Old way - threads.each { |t| t.join }
puts "after join #{all.inspect}" # full

Sample output (output order of "stored" items is random)

> ./go.rb

before join []
Stored 2
Stored 0
Stored 1
Stored 3
Stored 4
after join [2, 0, 1, 3, 4]