From: Gennady <gfb@...>
Date: 2003-06-13T08:31:13+09:00
Subject: Re: Confused about to_s in Ruby / irb

Actually, irb uses "inspect" in this case.

Gennady.

----- Original Message ----- 
From: "you CAN teach an old dog ..." <itsme213@hotmail.com>
Newsgroups: comp.lang.ruby
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
Sent: Thursday, June 12, 2003 4:26 PM
Subject: Confused about to_s in Ruby / irb


> I wish to control the default display of my objects, and thought to_s
> would be the right hook. But ruby (at least irb) seems to use my to_s
> only if the class has no instance variables. Am I doing something
> wrong?
> 
> What other display-related hooks are there?
> 
> Thanks
> 
> irb> class A
> irb>   def to_s
> irb>     "an A"
> irb>   end
> irb> end
> nil
> 
> irb> A.new
> an A          # uses to_s
> 
> irb> class B
> irb>   def initialize(x)
> irb>     @x = x
> irb>   end
> irb>   def to_s
> irb>     "a B"
> irb>   end
> irb> end
> nil
> 
> irb> B.new (5)
> #<B:0x2a51b98 @x=5>   # ignores to_s
> 
>