add card and deck model

app/models/card.rb

@@ -0,0 +1,12 @@
+class Card
+  RANKS = %w(3 4 5 6 7 8 9 10 J Q K A 2)
+  SUITS = %w(Spade Club Diamond Heart)
+
+  attr_accessor :value, :rank, :suit
+
+  def initialize(value, rank, suit)
+    self.value = value
+    self.rank  = rank
+    self.suit  = suit
+  end
+end

app/models/deck.rb

@@ -0,0 +1,14 @@
+class Deck
+  attr_accessor :cards
+  def initialize
+    # init each Card ordered by value
+    value = 1
+    self.cards = []
+    Card::RANKS.each do |rank|
+      Card::SUITS.each do |suit|
+        self.cards << Card.new(value, rank.to_i, suit)
+        value += 1
+      end
+    end
+  end
+end