card.rb

class Card
  attr_accessor :rank, :suit

  def initialize(rank, suit)
    @rank = rank
    @suit = suit
  end

  def output_card
    puts "#{self.rank} of #{self.suit}"
  end

  def self.random_card
    Card.new(rand(10), :spades)
  end
end

class Deck 

  def initialize
    @cards = []
    @ranks = (2..10).to_a + ["Jack", "Queen", "King", "Ace"]
    @suits = ["Diamonds", "Hearts", "Clubs", "Spades"]
  end

  def build_deck
    @suits.each do |suit|
      @ranks.each do |rank|
        @cards << Card.new(rank, suit)
      end
    end
    @cards
  end

  def shuffle
    @cards.shuffle!
  end

   def deal
    @cards.shift
  end

  def output
    @cards.each do |card|
      card.output_card
    end
  end
end

deck = Deck.new
deck.build_deck
deck.shuffle
deck.deal.output_card