Wsrtjtyk

I'm working on a project to replicate Go Fish so I can learn more about structuring data and how to properly use arrays. I'm having a bit of trouble trying to figure out why I keep getting this error. I tried changing the variables into instance variable, this didn't seem to help much. I was hoping someone could take a peek at my code and point me in the right direction.
**Please feel free to give any suggestions, even if it's unrelated to the question. I don't know if I'm approaching this correctly.

card_deck = ["ace of spades", "ace of diamonds", "ace of clubs", "ace of hearts",

"two of spades", "two of diamonds", "two of hearts", "two of clubs",

"three of spades", "three of diamonds", "three of hearts", "three of clubs",

"four of spades", "four of diamonds", "four of hearts", "four of clubs",

"five of spades", "five of diamonds", "four of hearts", "five of clubs",

"six of spades", "six of diamonds", "six of hearts", "six of clubs",

"seven of spades", "seven of diamonds", "seven of hearts", "seven of clubs",

"eight of spades", "eight of diamonds", "eight of hearts", "eight of clubs",

"nine of spades", "nine of diamonds", "nine of hearts", "nine of clubs",

"ten of spades", "ten of diamonds", "ten of hearts", "ten of clubs",

"jack of spades", "jack of diamonds", "jack of hearts", "jack of clubs",

"queen of spades", "queen of diamonds", "queen of hearts", "queen of clubs",

"king of spades", "king of diamonds", "king of hearts", "king of clubs"]



puts "There are #{card_deck.length} cards in this deck."

puts "Welcome to Go-Fish."

print "Your name please: "

player_name = $stdin.gets.chomp.capitalize



puts "Ok #{player_name}, lets get this deck shuffled..."

#sleep(1)

# shuffles card_deck using .shuffle method

card_deck = card_deck.shuffle

puts "Cards are perfectly shuffled!"

#sleep(1)

puts "Dealing cards..."

#sleep(1)

# assigns first 7 cards to user

@my_hand = Array.new

@my_hand = card_deck[0..6].join(', ')

# assigns next 7 cards to CPU

@cpu_hand = Array.new

@cpu_hand = card_deck[7..13]



# removes first 14 cards from the deck (0-13)

@card_deck = card_deck.drop(13)



puts "Here's your hand: #{@my_hand}."

puts "You go first!"

puts "Do you have a..."

puts @cpu_hand.join(', ')

print "> "

@card = $stdin.gets.chomp.downcase



# if cpu has the card requested give it to the player and add to their array



if @cpu_hand.include?(@card)

  @my_hand.push(@card)

else

puts "Go fish!"

end

push method

a = [ "a", "b", "c" ]

a.push("d", "e", "f")

        #=> ["a", "b", "c", "d", "e", "f"]

[1, 2, 3,].push(4).push(5)

        #=> [1, 2, 3, 4, 5]

join method

[ "a", "b", "c" ].join        #=> "abc"

[ "a", "b", "c" ].join("-")   #=> "a-b-c"

If you want to remove first 7 cards from deck and place them in the players hand, you need to do this operation:

@my_hand = card_deck.shift(7)

After that you can give next 7 cards to CPU:

@cpu_hand = card_deck.shift(7)

There is no need to make drop after that.
Also, drop(13) will drop exactly 13 elements, not 14 (0-13).

Additionally, you may like shorter version of deck initialization:

cards = ['ace','one','two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten', 'jack', 'queen', 'king']

suits = ['spades', 'clubs', 'diamonds','hearts']

card_deck = cards.product(suits).collect{|x,y| "#{x} of #{y}"}