tests.rb

require 'rubygems'
require 'active_support'
require 'set'

a = [ 'q1', 'q2', 'q3', 'q4' , 'q5', 'q6']  #, 'q3', 'q4', 'q5'] #, 'q3', 'q4' ]

new_test = [] 


a.each_with_index do |item, index| 
  
  for_now = a.from(index.succ)
  
  for_now.each do |item2,index2|
    others = (for_now - item2.to_a);
    new_test << [item, item2].join("-")
    
    for_now.inject([]) do |memo, other|
      
      new_test << [item, others - other.to_a].flatten.join("-") 
      new_test << [item, (others - memo)].flatten.join("-")
      new_test << [item, memo].flatten.join("-")
      
      memo << other
    end
  end
 
  new_test << for_now.join("-") 
  
end

new_test << a.join("-")

puts new_test.size
puts Set.new(new_test).to_a.sort.inspect
puts Set.new(new_test).to_a.size
puts new_test.size