From: finer recliner <finerrecliner@...>
Date: 2007-05-26T05:40:03+09:00
Subject: Re: printing nil objects

On May 25, 4:31 pm, Enrique Comba Riepenhausen <eco...@mac.com> wrote:
> > ### code starts here ###
> > c1 = Node.new(1,nil,nil)
> > c2 = Node.new(2,nil,nil)
> > c3 = Node.new(3,nil,nil)
>
> > c1.setP1(c2)
> > c1.setP2(c2)
> > c2.setP1(c3)
>
> > current = c1
> > while current.getP1 != nil
> >     print "value = #{current.getV}, pointer1 = #{current.getP1.getV},
> > "
> >     if current.getP2.getV != nil then print "pointer2 =
> > #{current.getP2.getV}\n" else print "null\n" end
> >     current = current.getP1
> > end
> > [/code]
>
> Your problem lies exactly there. You are trying to make a method call
> (getV) on a nil object, and obviously it doesn't have the (getV)
> method...
>
> Try the following
>
> if current.getP2.nil? then....
>
> That should work.
>
> Cheers,
>
> ----
> Enrique Comba Riepenhausen
> eco...@mac.com
>
> I always thought Smalltalk would beat Java, I just didn't know it
> would be called 'Ruby' when it did.
> -- Kent Beck

ooooh. now i feel foolish lol. thanks!