BitOptions

class BitOptions
  attr_accessor :options, :raw
  def initialize *options
    @options = options
  end
  def parse raw
    ret = {}
    @options.each_with_index do |k, i|
      ret[k] = !!raw[i].nonzero?
    end
    ret
  end
end

bo = BitOptions.new *%i( a b )
pp bo.parse 2