From: Stefano Crocco <stefano.crocco@...>
Date: 2013-01-14T01:14:31+09:00
Subject: Re: attr_accessor question

On Monday 14 January 2013 Edoardo Rossi wrote
> Hello ruby-talk.
> 
> I hope this isn't a too silly question, but: who respond_to? true at
> attr_accessor?
> 
> irb(main):028:0> Module.respond_to?(:to_s)
> => true
> irb(main):029:0> Module.respond_to?(:attr_accessor)
> => false
> irb(main):030:0> Module.respond_to?(:attr)
> => false
> 
> I understand it's a class_macro in Module#attr_accessor...
> #attr_accessor, #attr_reader, #attr_writer
> 
> 
> Thanks to all.
> 
> e.

attr_accessor and similar are private methods of class Module. Because of 
this, respond_to? only returns true if you pass true as second argument:

Module.respond_to? :attr_reader, true
=> true

Module.respond_to? :attr_reader
=> false

I hope this helps

Stefano