Card = Struct.new(:suit, :rank) do
  include Comparable

  def precedence      ; [SUITS_SCORES[self.suit], RANKS_SCORES[self.rank]] end
  def rank_precedence ; RANKS_SCORES[self.rank] end
  def suit_precedence ; SUITS_SCORES[self.rank] end

  def <=>(other) ; self.precedence <=> other.precedence end

  def to_s ; "#{self.suit}#{self.rank}" end
end

Hand = Struct.new(:cards) do
  def sort         ; Hand[self.cards.sort] end
  def sort_by_rank ; Hand[self.cards.sort_by(&:rank_precedence)] end

  def to_s ; self.cards.map(&:to_s).join(', ') end
end