ruby deck of cards

deck_of_cards.rb

#
# Simulates a shuffled deck of cards.
# This demonstrates *one* way to simulate drawing
# 5 cards at a time from a deck of cards.
# This logic could easily be applied to games such
# as Blackjack or Texas Hold'em.
#
# Note - I included a card.val method specifically for
# checking a card's value for comparison in Poker (e.g.
# a straight is 5 consecutive card vals of the same suite).
# However, additional funcs would need to be added to check
# if a combination of cards contain a match
#
# Additionally, a `blackjack_val` method would need
# to be added which returns the numeric value for a card, or
# a wildcard (1 or 11 - recommend "%") if the card is an Ace.
#

puts "5 Card Draw"
20.times { print "-" }

class Card
  def initialize (name, suite)
    @name = name
    @suite = suite
  end

  def name
    @name
  end

  def suite
    @suite
  end

  def to_s
    _print_me
  end

  def to_str
    _print_me
  end

  def val
    _card_val
  end

  private

    def _name_val
      if @name == "A"
        return 1
      elsif @name == "1"
        return 2
      elsif @name == "2"
        return 3
      elsif @name == "3"
        return 4
      elsif @name == "4"
        return 5
      elsif @name == "5"
        return 6
      elsif @name == "6"
        return 7
      elsif @name == "7"
        return 8
      elsif @name == "8"
        return 9
      elsif @name == "9"
        return 10
      elsif @name == "10"
        return 11
      elsif @name == "Q"
        return 12
      elsif @name == "K"
        return 13
      end
      0
    end

    def _suite_val
      num_cards_in_suite = 13
      return 0 * num_cards_in_suite if @suite == "hearts"
      return 1 * num_cards_in_suite if @suite == "clubs"
      return 2 * num_cards_in_suite if @suite == "spaids"
      return 3 * num_cards_in_suite if @suite == "diamonds"
      0
    end

    def _card_val
      _name_val + _suite_val
    end

    def _print_me
      "#{@name} of #{@suite}"
    end
end

def build_deck
  deck = []
  names = ['A'].concat(("1".."10").to_a).concat(['Q', 'K'])
  suites = ['hearts', 'clubs', 'spaids', 'diamonds']
  for suite in suites
    for name in names
      deck << Card.new(name, suite)
    end
  end
  deck = deck.shuffle!.shuffle!.shuffle!
end

@deck = build_deck

def looop
  puts
  puts
  puts
  puts "Press [Enter]"
  # pause for user input
  gets.chomp

  i = 5
  while i > 0 && @deck.length > 0
    # draw one card out of deck and display it
    puts @deck.shift
    i -= 1
  end

  puts
  puts "#{@deck.length} cards left in deck"
end

while @deck.length > 0
  begin
    looop
  rescue Exception => e
    puts e, "please try again"
  end
end

puts "No more cards!"