Ruby code

class Square
  attr_accessor :state, :number
  def initialize(state, number)
    @state = state
    @number = number
  end
end
class Board
  attr_accessor :squares, :player, :won
  @@wins = [[1,2,3],[4,5,6],[7,8,9],[1,4,7],[2,5,8],[3,6,9],[1,5,9],[7,5,3]]
  def initialize(player)
    @squares = []
    @player = player
    if @player == "X"
      @computer = "O"
    else
      @computer = "X"
    end
    @won = false
    @turn = "player"
  end
  def create_squares
    (1..9).each do |n|
      @squares << Square.new(n, n)
    end
    @squares
  end
  def display_board
    puts "-------------"
    puts "| #{squares[0].state} | #{squares[1].state} | #{squares[2].state} |"
    puts "—————————————"
    puts "| #{squares[3].state} | #{squares[4].state} | #{squares[5].state} |"
    puts "—————————————"
    puts "| #{squares[6].state} | #{squares[7].state} | #{squares[8].state} |"
    puts "-------------"
  end
  def player_turn
    print "Type the number of the square you want to play on: "
    s = gets.chomp.to_i
    if (1..9).include? s
      if (1..9).include? @squares[s - 1].state
        squares[s - 1].state = @player
      else
        puts "You can't play on a square already played on!"
        player_turn
      end
    else
      puts "Type a number 1 to 9."
      player_turn
    end
  end
  def computer_turn
    s = (rand * 9).ceil
    if (1..9).include? @squares[s - 1].state
      squares[s - 1].state = @computer
      puts "The computer played on #{s}."
    else
      computer_turn
    end
  end
  def win(someone)
    @won = true
    puts "#{someone} wins!"
  end
  def check_for_win
    @@wins.each do |win|
      test = []
      win.each do |s|
        if (1..9).include? squares[s - 1].state
          test << false
        elsif squares[s - 1].state == "X"
          test << true
        else
          test << false
        end
      end
      if test[0] && test[1] && test[2]
        win("X")
        return nil
      end
    end
    @@wins.each do |win|
      test = []
      win.each do |s|
        if (1..9).include? squares[s - 1].state
          test << false
        elsif squares[s - 1].state == "O"
          test << true
        else
          test << false
        end
      end
      if test[0] && test[1] && test[2]
        win("O")
        return nil
      end
    end
    test = []
    @squares.each do |s|
      if (1..9).include? s.state
        test << false
      else
        test << true
      end
    end
    if test[0] && test[1] && test[2] && test[3] && test[4] && test[5]&& test[6] && test[7] && test[8]
      win("Nobody")
    end
  end
  def Board.init
    print "Would you like to be X or O? "
    player = gets.chomp.upcase
    if (player == "X") || (player == "O")
      b = Board.new(player)
      return b
    else
      puts "Please type X or O."
      init
    end
  end
  def play
    b = Board.init
    b.create_squares
    b.display_board
    loop do
      if @turn == "player"
        print "Your turn! "
        b.player_turn
        b.display_board
        b.check_for_win
        @turn = "computer"
      else
        sleep 1.2
        b.computer_turn
        b.display_board
        b.check_for_win
        @turn = "player"
      end
      return if @won
      break if @won
    end
  end
end
start = Board.new("X")
start.play