From: Mirko Aigner <Mirko.Aigner@alcatel.de>
To: caml-list@inria.fr
Subject: Re: [Caml-list] prevent more than one object
Date: Thu, 03 Jul 2003 13:36:20 +0200 [thread overview]
Message-ID: <3F041534.2000508@alcatel.de> (raw)
In-Reply-To: <3F041173.8010903@ozemail.com.au>
John Max Skaller wrote:
> Why? Its a design error. Fix your design.
>
> There's never any need for a singleton object,
>
> because there is no resource for which there
> cannot be more than one. I have seen (C++) designs
> using singletons and they create an utter mess
> because someone wrongly assumed something was
> unique.
>
> If you want one object, define the class in your
> mainline, create it, and then coerce it to
> a shared class type which does not provide a constructor.
>
Maybe you're right, but this is not the right place to discuss the
usefullnesss of the design patterns described by the GoF.
Vincente and Wagner describe in their paper, that singleton pattern
could be implemented with modules.
sdg.lcs.mit.edu/~dnj/6898/projects/vicente-wagner.pdf
I was testing it and got some problems, mentioned it here and got some
hints how to solve the problem.
THANKS to all helping me with it!!
Mirko Aigner
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prev parent reply other threads:[~2003-07-03 11:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-02 16:14 Mirko Aigner
2003-07-02 16:43 ` Nick Name
2003-07-03 11:20 ` John Max Skaller
2003-07-03 11:36 ` Mirko Aigner [this message]
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