counts neighbors in a 2D array

minesweeper.rb

require 'matrix'
width = 6
height = 5
number_of_mines = 25

def generate_board(width, height, number_of_mines)
  two_d_array = Array.new(height) {Array.new(width, 0)}
  height_index_max = height
  width_index_max = width
  placed_mines = 0
  until (placed_mines == number_of_mines) do
    next if two_d_array[rand(height_index_max)][rand(width_index_max)] == '*'
    two_d_array[rand(height_index_max)][rand(width_index_max)] = '*'
    placed_mines = two_d_array.flatten.count('*')
  end
  mine_locations(two_d_array, number_of_mines)
end


def mine_locations(board, number_of_mines)
  mine_locations = []
  board.each_with_index do |row, row_index|
      row.each_with_index do |cell, col_index|
          count_neighbors(row_index, col_index, board) unless cell == '*'
          mine_locations << [row_index, col_index] if cell == '*'
      end
  end
  print_b(board)
  mine_locations
end

def count_neighbors(x,y, board)
  return if board[x][y] == '*'
  topLeft  = board.another_dig((x - 1),(y - 1)) == '*'
  top      = board.another_dig(x, y - 1) == '*'
  topRight = board.another_dig(x + 1, y - 1) == '*'
  midLeft  = board.another_dig(x - 1, y) == '*'
  midRight = board.another_dig(x + 1,y) == '*'
  botLeft  = board.another_dig(x - 1,y + 1)== '*'
  bot      = board.another_dig(x,y + 1) == '*'
  botRight = board.another_dig(x + 1,y + 1) == '*'

  mine_count = []
  mine_count << topLeft << top << topRight << midLeft << midRight << botLeft << bot << botRight
  mine_count = mine_count.count(true)
  board[x][y] = mine_count
  board[x][y]
end

def print_b(b)
  b.each do |a|
     p(a)
  end
end

class Array
  def another_dig(*args)
    self.dig(*args) unless args.any?{|num| num<0}
  end
end

b = generate_board(width,height,number_of_mines)