From: Jon Harrop <jon@ffconsultancy.com>
To: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] Feature request : Tuples vs. records
Date: Thu, 22 Feb 2007 15:44:07 +0000 [thread overview]
Message-ID: <200702221544.07719.jon@ffconsultancy.com> (raw)
In-Reply-To: <45DDA0BF.2000807@ens-lyon.org>
On Thursday 22 February 2007 13:55, David Teller wrote:
> Yes, that's actually the only real difference I see between records and
> tuples. I have the feeling that every other difference is just syntactic
> sugar.
>
> Now, unless I'm mistaken, OCaml's design is mostly towards structural
> typing. Usually, when one wants nominal typing, one resorts to abstract
> types safely hidden in modules. From this point of view, nominal typing
> of records is therefore somewhat surprising.
>
> Am I getting something wrong ?
Structural typing is weaker. So tuples are only suitable for simple cases
(primarily returning pairs of values from functions). Whenever things get
complicated (>3 fields) you should switch to records.
Structural typing is often slower. So records are preferable when performance
is critical.
--
Dr Jon D Harrop, Flying Frog Consultancy Ltd.
OCaml for Scientists
http://www.ffconsultancy.com/products/ocaml_for_scientists
next prev parent reply other threads:[~2007-02-22 15:50 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-22 10:25 David Teller
2007-02-22 10:42 ` [Caml-list] " Andrej Bauer
2007-02-22 12:41 ` skaller
2007-02-22 13:55 ` David Teller
2007-02-22 15:44 ` Jon Harrop [this message]
2007-02-22 19:45 ` Tom
2007-02-22 23:26 ` skaller
2007-02-22 15:28 ` Andreas Rossberg
2007-02-22 15:57 ` Till Varoquaux
[not found] ` <45DDC424.2020804@ens-lyon.org>
2007-02-22 16:57 ` Till Varoquaux
2007-02-22 17:19 ` brogoff
2007-02-22 15:34 Frederic GAVA
2007-02-22 16:16 ` David Teller
2007-02-23 1:39 ` Jacques Garrigue
2007-02-23 13:34 ` Richard Jones
2007-02-23 13:43 ` Till Varoquaux
2007-02-23 14:14 ` Nicolas Pouillard
2007-02-23 1:45 ` Jon Harrop
2007-02-23 16:32 ` Lukasz Stafiniak
2007-02-24 13:43 ` Lukasz Stafiniak
2007-02-24 15:50 ` Brian Hurt
2007-02-24 18:14 ` skaller
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=200702221544.07719.jon@ffconsultancy.com \
--to=jon@ffconsultancy.com \
--cc=caml-list@yquem.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;
as well as URLs for NNTP newsgroup(s).