From: nma124@hotmail.com (steve_H)
Subject: Re: if file exist
Date: 27 Sep 2002 03:47:11 -0700
Date: 2002-09-27T10:47:11+00:00 [thread overview]
Message-ID: <8db3d6c8.0209270247.5bf07ae5@posting.google.com> (raw)
In-Reply-To: wccadm41jqs.fsf@shell01.TheWorld.com
Robert A Duff <bobduff@shell01.TheWorld.com> wrote in message news:<wccadm41jqs.fsf@shell01.TheWorld.com>...
> I don't agree that "a general solution is not possible".
> A File_Exists return Boolean function makes perfect sense.
> Of course it returns False if the file is invisible to the
> current process (because it "exists" in an inaccessible directory).
> To *this* process, that file does not exist.
But the above is not logical. If your function return FALSE, then one
does not know if this means the file actually does not exist, or that
the function was not able to determine if it exist or not becuase of
permission issues. The user might want to know this.
You have overloaded the boolean result of FALSE to mean more than one thing.
Why not have simply have a function that returns a status code istead of
TRUE or FALSE? A status code can have more information in it than just a flag.
next prev parent reply other threads:[~2002-09-27 10:47 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.1032687678.1150.comp.lang.ada@ada.eu.org>
2002-09-22 9:58 ` if file exist Preben Randhol
2002-09-22 19:25 ` Keith Thompson
2002-09-22 11:26 ` Dale Stanbrough
2002-09-22 14:45 ` Simon Wright
2002-09-22 17:24 ` Frank J. Lhota
2002-09-22 19:24 ` Keith Thompson
2002-09-22 22:20 ` Dale Stanbrough
2002-09-23 5:14 ` Simon Wright
2002-09-23 12:38 ` Larry Kilgallen
2002-09-26 0:39 ` Nick Roberts
2002-09-26 16:48 ` Warren W. Gay VE3WWG
2002-09-26 22:14 ` Robert A Duff
2002-09-27 10:47 ` steve_H [this message]
2002-09-27 14:01 ` Robert A Duff
2002-09-27 18:43 ` Randy Brukardt
2002-09-28 1:17 ` Keith Thompson
2002-09-28 13:04 ` Marin David Condic
2002-09-29 4:50 ` Keith Thompson
2002-09-29 5:13 ` Christopher Browne
2002-09-27 21:59 ` Mark Biggar
2002-09-27 23:09 ` Larry Kilgallen
2002-10-04 20:56 ` Stefan Skoglund
2002-10-05 13:59 ` Robert A Duff
2002-10-06 20:35 ` Keith Thompson
2002-10-07 0:34 ` Robert A Duff
2002-10-07 5:42 ` David Thompson
2002-10-13 17:05 ` Larry Kilgallen
2002-10-21 2:17 ` David Thompson
2002-09-22 11:55 ` Per Sandbergs
2002-09-22 22:29 ` SteveD
2002-09-23 1:53 ` if_file_exist : it's working thankyou all! Dominic D'Apice
2002-09-23 5:25 ` Simon Wright
2002-09-23 23:59 ` Dominic D'Apice
2002-09-25 19:13 ` Simon Wright
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox