gofish.rb

class Game
  def initialize
    @ranks = (0x1..0xE).to_a # 0x2 = 2 .. 0xE = Ace
    @deck  = []
    @hands = [[],[]]
    @active = rand(0..1) # stores which player is active

    def turn
      return @active%2
    end

    def not_turn
      return 0==turn ? 1 : 0
    end

    4.times do # populate deck with ranks for each of four suits
      @deck << @ranks
    end
    @deck.flatten!
    @deck.shuffle!
    return self
  end

  def run
    7.times do  # deal 7 initial cards
      @hands[turn].push(@deck.pop)
      @hands[not_turn].push(@deck.pop)
    end

    until @deck.empty?
      req = @hands[turn].empty? ? rand(0x2..0xE) : @hands[turn].sample
      if ( @hands[not_turn].include?(req) )
        @hands[not_turn].delete(req)
        @hands[turn] << req
      else
        @hands[turn] << @deck.pop
      end
      @active += 1 # next player's turn
      @active %= 2
    end
  end

  def to_s
    @hands.each do |hand| 
      hand.sort!
    end
    return self.inspect
  end
end

g = Game.new
p g.to_s
g.run
p g.to_s