From: "Stephan Kämper" <Stephan.Kaemper@...>
Date: 2002-04-04T22:31:44+09:00
Subject: Re: Test the result of an initialization ?

Jayce Piel wrote:
> 
> Yohanes Santoso <ysantoso@jenny-gnome.dyndns.org> wrote:
> 
> > jayce@mosx.net (Jayce Piel) writes:
> >
> > > What I want is if the path is not a path to a file, the object is not
> > > created. I try to do a "return nil" in initialize, but it has no effect.
> >
> > class ArchiveFile
> >   def initialize(filename)
> >     if not File.stat(filename).file?
> >       raise "#{filename} is not a valid file"
> >     end
> >   end
> > end
> 
> Hmmm...
> But the fact remains... Where must I put the catch ?

Nowhere...
In Ruby you 'raise' exceptions and handle them in a
begin/rescue/retry/ensure/end construct.
Check the freely available online pickaxe book for all the information.

Only (?) if you use 'throw' there's something to 'catch'. Seems reasonable,
in fact!
But this is _not_ to be confused with exceptions (and also explaind in the
online version
of the pickaxe book ->  http://www.rubycentral.com/downloads/book.html  )

HTH & happy rubying

Stephan