From: Richard Jones <rich@annexia.org>
Cc: Ocaml <caml-list@inria.fr>
Subject: Re: [Caml-list] Pervasives.compare output type
Date: Thu, 24 Mar 2005 19:41:15 +0000 [thread overview]
Message-ID: <20050324194115.GB9518@furbychan.cocan.org> (raw)
In-Reply-To: <42430B3B.60408@barettadeit.com>
On Thu, Mar 24, 2005 at 07:47:23PM +0100, Alex Baretta wrote:
> Pervasives.compare currently returns an int. Intuitively it would be
> more appropriate for it to return a union type such as the following.
>
> type comparison_result = Less | Equals | Greater
>
> What are the reasons behind the present design choice?
Wouldn't it be for speed? You could define Pervasives.compare over
integers just as a subtraction. For strings, you can write a loop
which looks character-by-character over the strings, subtracting one
character from another, and if the result is non-zero, return that
result directly (else keep iterating).
Rich.
--
Richard Jones, CTO Merjis Ltd.
Merjis - web marketing and technology - http://merjis.com
Team Notepad - intranets and extranets for business - http://team-notepad.com
next prev parent reply other threads:[~2005-03-24 19:41 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-24 18:47 Alex Baretta
2005-03-24 19:41 ` Richard Jones [this message]
2005-03-24 21:00 ` [Caml-list] " Marcin 'Qrczak' Kowalczyk
2005-03-24 21:38 ` Bardur Arantsson
2005-03-24 22:07 ` [Caml-list] " Jason Hickey
2005-03-24 22:26 ` brogoff
2005-03-25 9:42 ` Alex Baretta
2005-04-01 5:59 ` Aleksey Nogin
2005-03-24 22:15 ` Marcin 'Qrczak' Kowalczyk
2005-03-24 22:41 ` Bardur Arantsson
2005-03-25 9:43 ` [Caml-list] " Alex Baretta
2005-03-29 7:14 ` [Caml-list] " Oliver Bandel
2005-03-30 14:17 ` Xavier Leroy
2005-03-30 14:45 ` Alex Baretta
2005-03-30 15:11 ` Jacques Carette
2005-03-30 15:28 ` Alex Baretta
2005-03-30 17:47 ` brogoff
2005-03-30 18:21 ` Jacques Carette
2005-03-30 18:49 ` brogoff
2005-03-30 20:06 ` Jon Harrop
2005-03-30 20:43 ` Jacques Carette
2005-03-30 22:14 ` Christopher Dutchyn
2005-03-31 0:44 ` brogoff
2005-03-30 22:43 ` GADT?? (Re: [Caml-list] Pervasives.compare output type) Oliver Bandel
2005-03-30 22:35 ` [Caml-list] Pervasives.compare output type Oliver Bandel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20050324194115.GB9518@furbychan.cocan.org \
--to=rich@annexia.org \
--cc=caml-list@inria.fr \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox