tagged_in_board | WuyaSea.com

by dorren, 09/15/2007

Simple code to implement playing card. In case you want to build an online casino with Ruby on Rails, you got a head start. :)

class Deck
   COLOR = %w(S H D C)  # Spade Heart Diamond Club
   POINT = %w(2 3 4 5 6 7 8 9 10 J Q K A)
   attr_accessor :cards
   
   def initialize
     @cards = []
     COLOR.each{|c| 
       POINT.each{|p| 
         @cards << Card.new(COLOR.index(c), POINT.index(p))
       }
     }
     self
   end
   
   def shuffle
     52.times{|i| r = rand(52); @cards[i], @cards[r] = @cards[r], @cards[i]}
   end
   
   def sort
     @cards.sort!{|x, y| x <=> y}
   end
   
   def to_s
     @cards.collect{|c| "#{COLOR[c.color]} #{POINT[c.point]}"}.join("\n")
   end
end

class Card
  attr_accessor :color, :point
  def initialize(color, point)
    @color, @point = color, point
  end
  
  def <=>(obj)
    color == obj.color ? obj.point <=> point : color <=> obj.color
  end
end

deck = Deck.new
deck.shuffle
puts "\n----shuffle-----\n#{deck}"
deck.sort
puts "\n----sort-----\n#{deck}"

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