ruby-shuffle-test.rb

gistfile1.rb

require 'securerandom'

N = 100_000
A = %w(a b c)
Score = Hash.new { |h, k| h[k] = 0 }
N.times do
  sorted = A.sort_by{ SecureRandom.random_bytes(4).unpack("I")[0] }
  Score[sorted.join(" ")] += 1
end

Score.keys.sort.each do |key|
  puts "#{key}: #{Score[key]}"
end