Class: OXO::Board

Inherits:
Object
  • Object
show all
Defined in:
lib/oxo/board.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Board

Returns a new instance of Board.



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# File 'lib/oxo/board.rb', line 8

def initialize
  @rows, @cols = 3, 3
  @board = Array.new(@rows) { Array.new(@cols) }
end

Instance Attribute Details

#cols ⇒ Object

Returns the value of attribute cols.



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# File 'lib/oxo/board.rb', line 6

def cols
  @cols
end

#rows ⇒ Object

Returns the value of attribute rows.



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# File 'lib/oxo/board.rb', line 6

def rows
  @rows
end

Instance Method Details

#full? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/oxo/board.rb', line 35

def full?
  !@board.flatten.include? nil
end

#legal_move?(row, col) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/oxo/board.rb', line 13

def legal_move?(row, col)
  on_board?(row, col) && !piece_at(row, col)
end

#legal_moves ⇒ Object 



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# File 'lib/oxo/board.rb', line 23

def legal_moves
  empty_squares = []

  1.upto(rows) do |row|
    1.upto(cols) do |col|
      empty_squares << [row, col]  unless piece_at(row, col)
    end
  end

  empty_squares
end

#place(color, row, col) ⇒ Object 



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# File 'lib/oxo/board.rb', line 17

def place(color, row, col)
  return  unless legal_move?(row, col)

  @board[row - 1][col - 1] = color
end

#to_s ⇒ Object 



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# File 'lib/oxo/board.rb', line 48

def to_s
  output = "\n".dup
  hline = "+---" * @cols << "+\n"

  characters = @board.map {|row| row.map {|pos| pos.to_s.ljust(1) } }

  output << hline
  characters.each do |row|
    output << "| " << row.join(" | ") << " |" << "\n"
    output << hline
  end

  output << "\n"
end

#win?(color) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/oxo/board.rb', line 39

def win?(color)
  @board.each {|row| return true  if row.uniq == [color] }
  @board.transpose.each {|col| return true  if col.uniq == [color] }
  return true  if @board.flatten.values_at(0, 4, 8).uniq == [color]
  return true  if @board.flatten.values_at(2, 4, 6).uniq == [color]

  false
end