I am practicing my ruby skills after a long while from backpacking and I think I am way rustier than I thought. The following code below is a connect 4 game that I am trying to implement for Code Wars. While doing coding this, I am having a problem with the attr_accessor: turn_counter.
I have declared this variable as such, so I can increment it but when I call turn_tracker.odd? I receive a value of nil. Why is that? All my other variables are able to read/write respectively. For example, the grid is able to be called and returns the expected value. I don't see why turn_tracker should need the self call. The other variables don't need to. Can I get a refresher as to why that is? Thanks.
class Connect4
attr_reader :player_one, :player_two
attr_accessor :turn_tracker, :grid
def initialize
@player_one = Player.new("Player 1")
@player_two = Player.new("Player 2")
@turn_tracker = 1
@grid = [[],[],[],[],[],[]]
end
def play(column)
######### Problem ##############
if turn_tracker.odd?
self.turn_tracker += 1
################################
player_one.makes_a_move(grid[column])
win?(grid[column], player_one)
else
self.turn_tracker += 1
player_two.makes_a_move(grid[column])
win?(grid[column], player_two)
end
end
private
def win?(grid, player)
#vertical
if grid.count(player) == 4
player_indexes = grid.each_index.select do |i|
grid[i].name == player.name
end
one = (player_indexes[0].next == player_indexes[1])
two = (player_indexes[1].next == player_indexes[2])
three = (player_indexes[2].next == player_indexes[3])
if (one && two && three)
"#{player.name} wins!"
elsif column_full?(grid)
"Column full!"
else
"#{player.name} has a turn"
end
else
"#{player.name} has a turn"
end
end
def column_full?(grid)
grid.size == 7
end
end
class Player
attr_reader :name
def initialize(name)
@name = name
end
def makes_a_move(grid)
grid << self
end
end
puts "New game!"
game = Connect4.new
puts game.play(0) #"Should return 'Player 1 has a turn'
puts game.play(0) #"Should return 'Player 2 has a turn'
puts "New game!"
game = Connect4.new
puts game.play(0) #"Should return 'Player 1 has a turn'
puts game.play(1) #"Should return 'Player 2 has a turn'
puts game.play(0) #"Should return 'Player 1 has a turn'
puts game.play(1) #"Should return 'Player 2 has a turn'
puts game.play(0) #"Should return 'Player 1 has a turn'
puts game.play(1) #"Should return 'Player 2 has a turn'
puts game.play(0) #"Player 1 wins!", "Player 1 wins!'
puts "New game"
game = Connect4.new
puts game.play(4) #"Player 1 has a turn"
puts game.play(4) #"Player 2 has a turn"
puts game.play(4) #"Player 1 has a turn"
puts game.play(4) #"Player 2 has a turn"
puts game.play(4) #"Player 1 has a turn"
puts game.play(4) #"Player 2 has a turn"
puts game.play(4) # "Column full!"
