Path: csiph.com!usenet.pasdenom.info!dedibox.gegeweb.org!gegeweb.eu!nntpfeed.proxad.net!proxad.net!feeder1-2.proxad.net!usenet-fr.net!nerim.net!novso.com!newsfeed.xs4all.nl!newsfeed1a.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path: <random832@fastmail.us>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.019
X-Spam-Evidence: '*H*': 0.96; '*S*': 0.00; 'variables': 0.07; 'lawrence': 0.09; 'received:internal': 0.09; 'message- id:@webmail.messagingengine.com': 0.16; 'received:10.202': 0.16; 'received:10.202.2': 0.16; 'received:66.111': 0.16; 'received:66.111.4': 0.16; 'received:66.111.4.27': 0.16; 'received:messagingengine.com': 0.16; 'received:out3-smtp.messagingengine.com': 0.16; 'umpteen': 0.16; 'wrote:': 0.18; 'wed,': 0.18; 'version.': 0.19; 'header:In-Reply- To:1': 0.27; "doesn't": 0.30; 'fastest': 0.30; "i'm": 0.30; 'could': 0.34; 'received:66': 0.35; 'but': 0.35; 'two': 0.37; 'received:10': 0.37; 'to:addr:python-list': 0.38; 'extremely': 0.39; 'to:addr:python.org': 0.39; 'read': 0.60; 'from:no real name:2**0': 0.61; 'first': 0.61; 'times': 0.62; 'header:Message- Id:1': 0.63; '2014,': 0.84; 'sweeping': 0.84
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=fastmail.us; h= message-id:x-sasl-enc:from:to:mime-version :content-transfer-encoding:content-type:in-reply-to:references :subject:date; s=mesmtp; bh=am07HSfK9/WdFdpxuCO0mvTrj2E=; b=kkBp stfcdi0NFH0g7hoGKu5zGN2b/tkAg8qYucqysSDV2DKFuWctWqF8yVThVyGmee+p q3vNzgSJiaXMMSq9NZTpqruz355gF6aRPT0MyKUTY0kBvQ6jHr2ZAvXgMHwXWiiu uRRFP+654a2sfoOArHy3WK0rzP/ySmFtFRamVps=
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d= messagingengine.com; h=message-id:x-sasl-enc:from:to :mime-version:content-transfer-encoding:content-type:in-reply-to :references:subject:date; s=smtpout; bh=am07HSfK9/WdFdpxuCO0mvTr j2E=; b=t1MxfkrGZovrHmGvCzClwqIcilGECBpNffMXEtj7xOMSq5JQxZdjfRzp q7rIFVfrDmoOUa7ZRNriKms7N6BdjrP8eEVsKxBUIPnSC51wnaQZrgFMaNRU5UZH DtrS4GMO/s70LfoMbd9vHYVmsrOD2t725W0YlgyrowvSzEBJSP4=
X-Sasl-Enc: qRuFdFHXNu7FX6nmluPcvF+9v+I7UgmWMnfrwykLbseJ 1412826846
From: random832@fastmail.us
To: python-list@python.org
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Type: text/plain
X-Mailer: MessagingEngine.com Webmail Interface - ajax-1d265f39
In-Reply-To: <m14tsa$587$1@ger.gmane.org>
References: <u5kb3alsoleq8lh3eos289h5593m8033og@4ax.com> <m14o6t$uti$1@ger.gmane.org> <m14tsa$587$1@ger.gmane.org>
Subject: Re: Toggle
Date: Wed, 08 Oct 2014 23:54:06 -0400
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.14705.1412826850.18130.python-list@python.org>
Lines: 9
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1412826850 news.xs4all.nl 2899 [2001:888:2000:d::a6]:38033
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:78871

On Wed, Oct 8, 2014, at 23:02, Mark Lawrence wrote:
> When I first read this I was extremely jealous of the originator but 
> having used it umpteen times I'm still extremely jealous of the 
> originator!!!  Why doesn't my mind work like his? :)

You could also keep the ints in two variables and do a ^= b : b ^= a : a
^= b. Or use a, b = b, a. What I don't see in that answer is any
benchmarking support for his sweeping assertions of what is the fastest
version.