From: John Prevost <j.prevost@gmail.com>
To: Ocaml Mailing List <caml-list@inria.fr>
Subject: Re: [Caml-list] let () =
Date: Tue, 3 Aug 2004 11:11:49 -0400 [thread overview]
Message-ID: <d849ad2a04080308113aef7882@mail.gmail.com> (raw)
In-Reply-To: <86hdrkth3f.fsf@paul.rtelekom.ru>
It really means "I expect bla to have type unit, and am executing it
here for side effects." Some people write instead:
let _ = bla
Which means "I don't care what type bla has, but am executing it for
side effects." The let () one is somewhat safer because you are
explicitly saying you don't expect the call to return anything. The _
one, you might leave an argument out, and it would still typecheck.
JOhn.
-------------------
To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr
Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/
Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
next prev parent reply other threads:[~2004-08-03 15:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-03 14:46 Paul Argentoff
2004-08-03 15:09 ` Yann Regis-Gianas
2004-08-03 15:10 ` Richard Jones
2004-08-03 15:11 ` John Prevost [this message]
2004-08-03 17:08 ` Nicolas Cannasse
2004-08-04 10:14 ` Keith Wansbrough
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=d849ad2a04080308113aef7882@mail.gmail.com \
--to=j.prevost@gmail.com \
--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;
as well as URLs for NNTP newsgroup(s).