From: Stephen Leake <stephen_leake@stephe-leake.org>
Subject: Re: What is your opinion on Global Objects?
Date: Thu, 20 Nov 2014 10:34:28 -0600
Date: 2014-11-20T10:34:28-06:00 [thread overview]
Message-ID: <8561e9omp7.fsf@stephe-leake.org> (raw)
In-Reply-To: OzTaw.281638$lO7.189293@fx26.iad
Hubert <herrdoktor@fumanchu.com> writes:
> That basically is a vote for global objects. Whether they are accessed
> through a global variable or some sort of getter function that returns
> access, it means bypassing the parameters. Well from what I read here,
> there are no strong opinions for either concept. Strange, I wasn't
> able to find good arguments for or against the two concepts anywhere,
If you can really, truly, absolutely guarrantee that you will _never_
need two different copies of the data structure, then the singleton
pattern makes sense (data in a single variable in a package body).
If you ever need two different copies of the data structure, then you
need to pass it around in parameters.
The symbol table for a compiler is a good candidate for a singleton.
A database connection is not; you will need to copy the database from
one object to another when you change the schema or move to a new
backend in the future.
--
-- Stephe
next prev parent reply other threads:[~2014-11-20 16:34 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-18 1:36 What is your opinion on Global Objects? Hubert
2014-11-18 2:52 ` Jeffrey Carter
2014-11-18 3:08 ` Hubert
2014-11-18 3:16 ` Shark8
2014-11-18 5:09 ` Jeffrey Carter
2014-11-18 11:23 ` Brian Drummond
2014-11-19 2:50 ` Hubert
2014-11-19 3:03 ` Jeffrey Carter
2014-11-19 9:13 ` Hubert
2014-11-19 10:22 ` J-P. Rosen
2014-11-19 17:37 ` Jeffrey Carter
2014-11-20 16:34 ` Stephen Leake [this message]
2014-11-20 21:11 ` Adam Beneschan
2014-11-21 15:25 ` Stephen Leake
2014-11-21 21:53 ` Randy Brukardt
2014-11-21 1:25 ` Hubert
2014-11-21 3:00 ` Brad Moore
2014-11-19 10:11 ` Jacob Sparre Andersen
2014-11-20 6:21 ` Hubert
2014-11-18 8:54 ` Dmitry A. Kazakov
2014-11-20 20:33 ` sbelmont700
2014-11-20 21:35 ` J-P. Rosen
2014-11-21 1:02 ` sbelmont700
2014-11-21 1:31 ` Hubert
2014-11-21 9:01 ` Dmitry A. Kazakov
2014-11-22 7:46 ` J-P. Rosen
2014-11-22 9:02 ` Dmitry A. Kazakov
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox