From: Nick Warne <nick@linicks.net>
To: linux-kernel@vger.kernel.org
Subject: Re: A pettiness question.
Date: Wed, 21 Sep 2005 20:46:15 +0100 [thread overview]
Message-ID: <200509212046.15793.nick@linicks.net> (raw)
>> This give a enum of {0,1}. If test is not 0, !!test will give 1,
>> otherwise 0.
>>
>> Am I right?
>
> Yes. I think of it as a "truth value" predicate (or operator).
Interesting. I thought maybe this way was trick, until later I experimented.
My post here (as Bill Stokes):
http://www.quakesrc.org/forums/viewtopic.php?t=5626
So what is the reason to doing !!num as opposed to num ? 1:0 (which is more
readable I think, especially to a lesser experienced C coder). Quicker to
type?
My quick test shows compiler renders both the same?
Nick
--
"When you're chewing on life's gristle,
Don't grumble, Give a whistle..."
next reply other threads:[~2005-09-21 19:46 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-21 19:46 Nick Warne [this message]
2005-09-21 20:05 ` A pettiness question Vadim Lobanov
2005-09-22 7:10 ` Helge Hafting
2005-09-22 12:21 ` Steven Rostedt
2005-09-22 14:40 ` linux-os (Dick Johnson)
2005-09-22 2:43 ` Fawad Lateef
[not found] <4PiLw-2yn-25@gated-at.bofh.it>
[not found] ` <4Pj4M-3as-1@gated-at.bofh.it>
[not found] ` <4PtnM-1oW-55@gated-at.bofh.it>
[not found] ` <4Pynh-fp-1@gated-at.bofh.it>
2005-09-25 14:38 ` Bodo Eggert
-- strict thread matches above, loose matches on Subject: below --
2005-09-21 7:49 liyu
2005-09-21 8:00 ` Ustyugov Roman
2005-09-21 8:57 ` Eyal Lebedinsky
2005-09-21 9:01 ` Fawad Lateef
2005-09-21 9:30 ` Andrea Arcangeli
2005-09-23 2:36 ` Vadim Lobanov
2005-09-21 15:08 ` Randy.Dunlap
2005-09-21 19:11 ` Bill Davidsen
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=200509212046.15793.nick@linicks.net \
--to=nick@linicks.net \
--cc=linux-kernel@vger.kernel.org \
/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