RUBY退出扫雷游戏循环

Question

我不知道如何退出游戏循环。我很努力地做了一个lose?函数，我试着像lose?(x)一样，在x==1的时候返回true，但是没有让它退出run方法。这是我为Game类编写的代码。

class Minesweeper

    attr_accessor :board

    def initialize
        @board = Board.new
    end

    def run
        puts "Welcome to minesweeper!"
        x = nil
        play_turn until win? || lose?(x)
    end

    def play_turn
            board.render
            pos, command = get_input
            debugger
            if !explode?(pos, command)
                board.set_input(pos,command)
            else
                puts "You lose!"
                lose?(1)
            end
    end

    def explode?(pos, cmd)
        board.grid[pos[0]][pos[1]].bomb && cmd == "reveal"
    end

    def get_input
        pos = nil
        command = nil
        until pos && check_pos(pos)
            puts "What position?"
            pos = parse_pos(gets.chomp)
        end
        until command && check_command(command)
            puts
            puts "What would you like to do (e.g. reveal, flag... ~ else?)"
            command = gets.chomp
            puts
        end
        [pos, command]
    end

#Some code here (check_pos, etc)



    def lose?(x)
        return true if x == 1
        false
    end

    def win?
        # board.all? {}
    end


end

我之前在Board类中有explode?，但是为了能够结束游戏，我把它移到了这里。任何帮助都是非常感谢的！

Answer 1

如果我们稍微扩展一下您的run方法，问题就会变得更加明显：

def run
  puts "Welcome to minesweeper!"
  x = nil
  until(win? || lose(x)) do
    play_turn
  end
end

在此方法中，您将创建一个新变量x，该变量的作用域为此方法，其值为nil。这个变量永远不会在该方法的作用域中设置，因此总是nil，这意味着检查win? || lose(x)也可以写为win? || lose(nil)，并且lose永远不会返回true。

如果从play_turn方法返回一个值，则可以使用该值。请注意，在该方法中执行的最后一件事的结果是返回的：

def play_turn
  board.render
  pos, command = get_input
  debugger

  if !explode?(pos, command)
    board.set_input(pos,command)
    true
  else
    puts "You lose!"
    false
  end
end

这意味着您的run方法可以检查结果：

def run
  puts "Welcome to minesweeper!"

  # we now know that play_turn returns true if the turn was not a loser
  # (i.e. it should continue to the next loop) and false if the player
  # lost, so we can use that returned value in our loop.
  while(play_turn) do
    if win?
      puts "looks like you won!"
      # if the player wins, we want to exit the loop as well. This is done
      # using break
      break
    end
  end
end

请注意，这也意味着您不需要单独的lose方法