CARDS = %w(A 2 3 4 5 6 7 8 9 10 J Q K)
def hand_value(hand)
value = 0
# First calculate values ignoring aces
hand.each do |card|
if card == 'J' || card == 'Q' || card == 'K'
value += 10
elsif card != 'A'
value += card.to_i
end
end
# Then add aces as 11 unless they would bust the hand
hand.each do |card|
if card == 'A'
if value > 10
value += 1
else
value += 11
end
end
end
value
end
def play_blackjack(upcard)
hand = [upcard]
while hand_value(hand) < 17
hand << CARDS[rand(13)]
end
hand_value(hand)
end
def simulate(upcard, num_games)
busts = 0
num_games.times do
hand_val = play_blackjack(upcard)
if hand_val > 21
busts = busts + 1
end
end
busts
end
CARDS.each do |card|
puts "Busts for #{card} = #{simulate(card, 1000)}"
end
