カード情報を連想配列ではなくCardクラスに切り出す。

card.rb

@@ -0,0 +1,8 @@
+class Card
+  SUITS = [:♠︎, :♣︎, :❤, :♦︎]
+
+  def initialize(suit, num)
+    @num = num
+    @suit = suit
+  end
+end

deck.rb

@@ -1,15 +1,15 @@
+require_relative "card"
+
 class Deck
-  SUITS = ["♠︎", "♣︎", "❤︎", "♦︎"]
-
   attr_accessor :decks
-  
+
   def initialize
     @decks = []
-    
-    SUITS.each do |suit|
+
+    Card::SUITS.each do |suit|
       (1..13).each do |num|
-        @decks << {suit: suit, num: num}
+        @decks << Card.new(suit, num)
       end
     end
   end
-end
+end