gistfile1

#!/usr/bin/ruby

# This program adds up the numbers 1 through 10,000 using 100 threads.

# Challenge A: Does this solution have any problems? If so, explain.
# Challenge B: Propose an alternate implementation that does not use threads.

require "thread"

mt_result = 0
100.times.map do |n|
  Thread.new do
    base = 1 + (n * 100)
    100.times do |i|
      mt_result += base + i
    end
  end
end.map(&:join)

puts "The multi-threaded result is: #{mt_result}"