I'm creating a card game with multiple classes. Currently, I'm using global variables to hold the $shuffled_deck
, $players_hand
, and $dealers_hand
variables, but I worry when using global variables (perhaps, needlessly) and would prefer to use instance variables.
I've been reading around, but nothing is really clicking. Can anyone help point me in the right direction with this?
Using instance variables I haven't been able to save the @players_hand
and @dealers_hand
to be able to use them in other classes. For instance, I have @players_hand
from the Player
class. I have the Dealer
class draw a card, but I can't pull that @players_hand
into the Dealer
class to add the two together.
My current code is:
class Blackjack
def initialize
@player = Player.new
@dealer = Dealer.new
end
end
class Dealer
def initialize
@deck = Deck.new
$dealers_hand = 0
end
def hit_dealer
@deck.hit_dealer
end
def hit_player
@deck.hit_player
end
def draw_card
@hit = $shuffled_deck
end
def shuffle
@deck.suits
end
end
class Player
def initialize
$players_hand = 0
end
end
class Deck
def suits
#code that shuffled the deck..
$shuffled_deck = @shuffled_deck
end
def hit_player
@hit = $shuffled_deck.pop
end
def hit_dealer
@hit = $shuffled_deck.pop
end
end
using your example you can do it like this
class Blackjack
attr_reader :player, :dealer
def initialize
@player = Player.new
@dealer = Dealer.new
end
end
class Dealer
def dealers_hand #the long java way of a getter
@dealers_hand
end
#and now the short ruby way
attr_reader :dealers_hand #if you only need to read the attribute
attr_writer :dealers_hand #if you only need to write the attribute
attr_accessor: dealers_hand #if you need both
def initialize
@deck = Deck.new
@dealers_hand = 5
end
def hit_dealer
@deck.hit_dealer
end
def hit_player
@deck.hit_player
end
def draw_card
@hit = $shuffled_deck
end
def shuffle
@deck.suits
end
end
class Player
attr_reader :players_hand
def initialize
@players_hand = 0
end
end
class Deck
def suits
attr_reader :shuffled_deck
@shuffled_deck = @shuffled_deck
end
def hit_player
@hit = $shuffled_deck.pop
end
def hit_dealer
@hit = $shuffled_deck.pop
end
end
game = Blackjack.new
p game.dealer.dealers_hand
game.dealer.dealers_hand = 4
p game.dealer.dealers_hand
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