From: "Iñaki Baz Castillo" <ibc@...>
Date: 2009-03-31T06:53:35+09:00
Subject: Re: Which methods does "puts" invoke?

El Lunes 30 Marzo 2009, Eric Jacoboni escribió:
> Iñaki Baz Castillo <ibc@aliax.net> writes:
> > Hi, if I redefine "to_s" or "inspect" methods in String class I still get
> > the original output when doing:
> >
> >   puts string
> >
> > Which String@method is invoked when executing "puts"?
>
> to_s  (inspect is called by p)
>
> >> class Truc
> >> end
>
> => nil
>
> >> machin = Truc.new
>
> => #<Truc:0x55604>
>
> >> puts machin
>
> #<Truc:0x55604>
> => nil
>
> >> class Truc
> >>   def to_s
> >>     "to_s called"
> >>   end
> >> end
>
> => nil
>
> >> puts machin
>
> to_s called
> => nil


Well, I already tested it, and yes, it seems to work if you define to_s method 
in some custom class, but note the following:

--------
class String
  def to_s
    "hiiiiiii"
  end
end

# s=String.new("qweqwe")
# puts s
qweqwe
nil
-----------

¿?

-- 
Iñaki Baz Castillo <ibc@aliax.net>