ruby - Beginning Ruby 中的 noMethoderror by Peter Cooper 第 6 章地下城游戏

Question

我卡在了第 6 章的部分。这是一个地牢文字冒险游戏，有房间和一个四处移动的玩家。对于 find_room_in_dungeon 方法中使用的 .detect 方法，我不断收到 noMethod 错误。我假设我可能遗漏了一些东西，但我就是想不通是什么。如果有人能帮助我，我将不胜感激。谢谢。

class Dungeon
  attr_accessor :player

  def initialize(player_name)
    @player=Player.new(player_name)
    @room  = []
  end

  def add_room(reference, name, description, connections)
    @room << Room.new(reference, name, description, connections)
  end

  def start(location)
    @player.location=location
    show_current_description
  end

  def show_current_description
    puts find_room_in_dungeon(@player.location).full_description
  end

  ###
  def find_room_in_dungeon(reference)
    @rooms.detect { |room| room.reference == reference }
  end
  ###

  def find_room_in_direction(direction)
    find_room_in_dungeon(@player.location).connections[direction]
  end

  def go(direction)
    puts "you go " + direction.to_s
    @player.location= find_room_in_direction(direction)
    show_current_description
  end

  class Player
    attr_accessor :name, :location

    def initialize(name)
      @name = name
    end

  end

  class Room
    attr_accessor :reference, :name, :description, :connections

    def initialize(reference, name, description, connections)
      @reference  =reference
      @name       =name
      @description=description
      @connections=connections
    end

    def full_description
      @name + "/n/n you are in" + @description
    end

  end
end
my_dungeon= Dungeon.new("adventurer")
my_dungeon.add_room(:largecave, "large cave", "a very large cave", {:west => :smallcave})
my_dungeon.add_room(:smallcave, "smallcave", "a small cave", {:east => :largecave})
my_dungeon.start(:largecave)

Answer 1

当您分配变量并在 add_room 中访问它时，您调用了变量 @room，但是当您尝试访问它时调用了 @rooms它在 find_room_in_dungeon 中。如果您将其重命名为在所有三种情况下都相同，它将起作用。

我建议将变量命名为 @rooms 而不是 @room 因为它是(可能)多个房间的数组，而不是单个房间。