From: Robert Klemme <bob.news@...>
Date: 2004-08-11T16:31:13+09:00
Subject: Re: stupid question: Object#name


"David A. Black" <dblack@wobblini.net> schrieb im Newsbeitrag
news:Pine.LNX.4.44.0408101652300.22756-100000@wobblini...
> Hi --
>
> On Wed, 11 Aug 2004, Gavri Savio Fernandez wrote:
>
> > > From: Mark Hubbart
> > > Subject: Re: stupid question: Object#name
> >
> > > This is a fairly common OO topic, and there is a pretty good
> > > description of classes and objects here:
> > >
> > > http://www.visibleworkings.com/little-ruby/Chapter3.pdf
> >
> > One part of this chapter (Page 5)  is driving me crazy. I tried it in
irb and it doesn't work as described in the chapter.
> >
> > >From the book (paraphrased(?)......sort of)
> >
> > ####################################################
> > class Celery
> > end
> >
> > class IceCream
> >   def IceCream.new(starting_licks)
> >     Celery.new
> >   end
> > end
> >
> > class IceCream
> >   def IceCream.small
> >     new(80)
> >   end
> > end
> >
> > ....I can send messages to what
> > class answers, like this:
> >
> > food = IceCream.small
> > more_food = food.class.small
> >
> > Both food and more_food would be
> > instances of Celery.
> > #######################################################
> >
> > I understand how food is an instance of Celery.
> > But how is more_food an instance of Celery?
>
> It isn't.  Maybe Brian meant that second line to be:
>
>   more_food = food.class.new
>
> but I'm not sure.

Illustration:

>> food = IceCream.small
=> #<Celery:0x1016f848>
>> food.class
=> Celery
>> more_food = food.class.small
NoMethodError: undefined method `small' for Celery:Class
        from (irb):17
>> more_food = food.class.new
=> #<Celery:0x100c63b8>
>>

Regards

    robert