From: Trans <transfire@...>
Date: 2008-08-08T07:03:52+09:00
Subject: Re: module_function



On Aug 7, 3:24 pm, Patrick Li <patrickli_2...@hotmail.com> wrote:
> Hi,
> I'm having some trouble using module_function correctly. If someone
> could help me it'd be great.
>
> I have a module M that defines method a().
> I would like for a() to be callable by M.a() or include M; a();
>
> However (and this is where my problem lies)
> a() calls the helper method b().
>
> module M
>   module_function
>   def a
>     b
>   end
>
>   private
>   def b
>     #helper method
>   end
> end
>
> This throws a NoMethodError when I try to call M.a(), because it looks
> for M.b() (but there isn't and shouldn't be any).
>
> What's the normal way for resolving this?

One way is to say, "to hell with module_function":

  module M
    extend self

    def a
      b
    end

    private
    def b
      #helper method
    end
  end

T.