gistfile1.rb

def keep_splitting(values)
  return if values.empty?
  
  if values.include?(true) && values.include?(false)
  
    puts
    puts "Values"
    p values
    puts "have a mixture, keep splitting"
    column_2 = (column_1 = values.dup).slice!(0, values.size/2)
    keep_splitting(column_2)
    keep_splitting(column_1)
    
  else
    puts
    puts "Values"
    p values
    puts "are all the same. we are done."
    return
  end
end

values = [true, false, true, true, true, true, false, false]
keep_splitting(values)