Question

这是Beginning Ruby的Dungeon示例：

class Dungeon
def add_room(reference, name, description, connections)
    @rooms << Room.new(reference, name, description, connections,)
end

class Player
    attr_accessor :name, :location

    def initialize(player_name)
        @name = player_name
    end
end

def initialize(player_name)
    @player = Player.new(player_name)
    @rooms = []
end
end
my_dungeon = Dungeon.add_room(:largecave, "Large Cave", "a large cavernous cave", {:west => :smallcave})
my_dungeon = Dungeon.add_room(:smallcave, "Small Cave", "a small claustrophobic cave", {:east => :largecave})

此代码在Sublim Text 2中无错误地构建，直到我将其保存到HD上的文件中。一旦它保存到我的电脑，我就会从Sublime Text 2

中得到这个构建错误

C:/Ruby193/bin/stephon.rb:18:in `<main>': undefined method `add_room' for Dungeon:Class (NoMethodError)
[Finished in 0.0s with exit code 1]

我在comm窗口中使用%PATH%命令添加了此代码所在的目录和Ruby目录。没有变化。

任何帮助都将不胜感激。

Answer 1

add_room类上的Dungeon方法是一种实例方法。这意味着，必须先创建类的新实例，然后才能在实例上调用该方法。

这样的事情应该有用（只要你在某处定义Room类）：

my_dungeon = Dungeon.new("Player 1")
my_dungeon.add_room(:largecave, "Large Cave", "a large cavernous cave", {:west => :smallcave})
my_dungeon.add_room(:smallcave, "Small Cave", "a small claustrophobic cave", {:east => :largecave})

sublime text 2中的ruby程序在保存的.rb文件中抛出“未定义的方法”错误

1 个答案: