initial commit

card.rb

@@ -0,0 +1,73 @@
+#!/usr/bin/env ruby
+
+class Card
+
+	attr_reader :rank, :suit
+
+	def initialize(str)
+		r = str[0,1].downcase
+		s = str[1,1].downcase
+		@suit = case s
+			when 's' then :spades
+			when 'h' then :hearts
+			when 'd' then :diamonds
+			when 'c' then :clubs
+		end
+		@rank = case r
+			when '2'..'9' then r.to_i
+			when 't' then 10
+			when 'j' then 11
+			when 'q' then 12
+			when 'k' then 13
+			when 'a' then 14
+		end
+	end
+
+	def to_s
+		rank_s + " of " + suit_s
+	end
+
+	def rank_s
+		case @rank
+			when 2 then "two"
+			when 3 then "three"
+			when 4 then "four"
+			when 5 then "five"
+			when 6 then "six"
+			when 7 then "seven"
+			when 8 then "eight"
+			when 9 then "nine"
+			when 10 then "ten"
+			when 11 then "jack"
+			when 12 then "queen"
+			when 13 then "king"
+			when 14 then "ace"
+		end
+	end
+
+	def suit_s
+		@suit.to_s
+	end
+
+	def ==(other)
+		@rank == other.rank && @suit == other.suit
+	end
+
+	def <=>(other)
+		if @rank != other.rank
+			@rank <=> other.rank
+		else
+			# order is Spades, Hearts, Diamonds, Clubs (conveniently reverse alphabetical)
+			other.suit_s <=> suit_s
+		end
+	end
+
+	def eql?(other)
+		self == other
+	end
+
+	def hash
+		to_s.hash
+	end
+end
+