Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #21124

Re: lang comparison: in-place algorithm for reversing a list in Perl,Python, Lisp

Path csiph.com!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!tudelft.nl!txtfeed1.tudelft.nl!feeder3.cambriumusenet.nl!feeder1.cambriumusenet.nl!feed.tweaknews.nl!194.109.133.84.MISMATCH!newsfeed.xs4all.nl!newsfeed5.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path <rosuav@gmail.com>
X-Original-To python-list@python.org
Delivered-To python-list@mail.python.org
X-Spam-Status OK 0.036
X-Spam-Evidence '*H*': 0.93; '*S*': 0.00; 'subject:Python': 0.05; 'decent': 0.07; 'rounds': 0.07; 'to)': 0.07; 'integers': 0.09; 'received:10.50': 0.09; 'am,': 0.12; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'subject: \n ': 0.16; 'work"': 0.16; 'wrote:': 0.18; 'received:209.85.210.174': 0.21; 'received :mail-iy0-f174.google.com': 0.21; 'subject:list': 0.21; 'header :In-Reply-To:1': 0.22; '(or': 0.22; 'ignore': 0.24; 'expect': 0.25; 'fact': 0.27; 'producing': 0.28; 'message- id:@mail.gmail.com': 0.29; 'definition': 0.30; 'it.': 0.33; 'fri,': 0.34; 'lee': 0.34; 'integer': 0.34; 'measure': 0.34; 'safely': 0.34; 'to:addr:python-list': 0.35; 'two': 0.36; 'received:google.com': 0.37; 'skip:" 10': 0.37; 'received:209.85': 0.38; 'third': 0.38; 'data': 0.38; 'received:209': 0.39; 'point': 0.40; 'to:addr:python.org': 0.40; 'easy': 0.60; 'header:Received:6': 0.61; 'results': 0.64; 'with,': 0.73; 'subject:,': 0.82; '"just': 0.84; 'casting': 0.84; 'negatives,': 0.84; 'semantics,': 0.84; 'xah': 0.84; 'subject:place': 0.91; 'subject:lang': 0.95
Received-SPF pass (google.com: domain of rosuav@gmail.com designates 10.50.170.41 as permitted sender) client-ip=10.50.170.41;
Authentication-Results mr.google.com; spf=pass (google.com: domain of rosuav@gmail.com designates 10.50.170.41 as permitted sender) smtp.mail=rosuav@gmail.com; dkim=pass header.i=rosuav@gmail.com
DKIM-Signature v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=9WecdTzbu1eU+ASoRQ1xg5bPL+YXFKcD4ChSHTUd6HU=; b=HMxwPQvjkAj5ZfDy99UM9z21DhyMzJQxDVvOhVKH9LFeBdm/3P/T9bx00g9/xqkze3 0pyephmPnS+CJM74vloP36bpE+JlNGkFkjZYTEtBDhB4gj8tYoH9jXMft8y4l/UnDAsJ Ts4ywa2/m4RJR5OCJT01qA2+VVMJhS8i4JtlDy1R1moAX86tqC+hKhu5EFNJ/Qcaz2R6 5nUrbCoQ2+EhHVaIQrkNvVFwYu7KUOD4m0aPCMY8wOHNd0wAtM7npDwYBHrrw1l8EQs5 1KoDcHJ2fpP9h9ynghcaU8/5lZVJO/QqzmEaywkl3D/h1zDsudQ71sKMc14hQ+GcsUec 54Gg==
MIME-Version 1.0
In-Reply-To <8e769add-e63c-4a74-bb7e-ddd36c04a415@vs5g2000pbc.googlegroups.com>
References <85fa5760-68c8-41a2-9116-2489165f7ca1@j5g2000yqm.googlegroups.com> <jin5fp03os@enews1.newsguy.com> <20120229231658.89@kylheku.com> <wkv4d38we76f.fsf@runa.se> <20120301064937.505@kylheku.com> <8e769add-e63c-4a74-bb7e-ddd36c04a415@vs5g2000pbc.googlegroups.com>
Date Fri, 2 Mar 2012 18:11:29 +1100
Subject Re: lang comparison: in-place algorithm for reversing a list in Perl,Python, Lisp
From Chris Angelico <rosuav@gmail.com>
To python-list@python.org
Content-Type text/plain; charset=ISO-8859-1
X-BeenThere python-list@python.org
X-Mailman-Version 2.1.12
Precedence list
List-Id General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe <http://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 <http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups comp.lang.python
Message-ID <mailman.341.1330672293.3037.python-list@python.org> (permalink)
Lines 16
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1330672293 news.xs4all.nl 6957 [2001:888:2000:d::a6]:52782
X-Complaints-To abuse@xs4all.nl
Xref csiph.com comp.lang.python:21124

Show key headers only | View raw

On Fri, Mar 2, 2012 at 9:04 AM, Xah Lee <xahlee@gmail.com> wrote:
> One easy
> way to measure it is whether a programer can read and understand a
> program without having to delve into its idiosyncrasies.

Neither the behavior of ints nor the behavior of IEEE floating point
is a "quirk" or an "idiosyncracy". These are data types with
well-defined semantics, and you need to understand them to use them.
The fact that dividing two positive integers and producing (or casting
to) a third integer rounds the result down is just as much a part of
the definition as is two's complement negatives, which most people can
safely ignore because they "just work" the way you expect.

Learn what you're working with, if you expect to get decent results from it.

ChrisA

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

lang comparison: in-place algorithm for reversing a list in Perl, Python, Lisp Xah Lee <xahlee@gmail.com> - 2012-02-29 20:07 -0800
  Re: lang comparison: in-place algorithm for reversing a list in Perl, Python, Lisp Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-03-01 05:01 +0000
    Re: lang comparison: in-place algorithm for reversing a list in Perl, Python, Lisp Xah Lee <xahlee@gmail.com> - 2012-02-29 21:39 -0800
  Re: Re: lang comparison: in-place algorithm for reversing a list in Perl, Python, Lisp Evan Driscoll <driscoll@cs.wisc.edu> - 2012-03-01 00:07 -0600
  Re: lang comparison: in-place algorithm for reversing a list in Perl,Python, Lisp "WJ" <w_a_x_man@yahoo.com> - 2012-03-01 06:37 +0000
    Re: lang comparison: in-place algorithm for reversing a list in Perl,Python, Lisp Rainer Weikusat <rweikusat@mssgmbh.com> - 2012-03-01 22:14 +0000
    Re: lang comparison: in-place algorithm for reversing a list in Perl,Python, Lisp Xah Lee <xahlee@gmail.com> - 2012-03-01 14:04 -0800
      Re: lang comparison: in-place algorithm for reversing a list in Perl,Python, Lisp Chris Angelico <rosuav@gmail.com> - 2012-03-02 18:11 +1100
        Re: lang comparison: in-place algorithm for reversing a list in Perl,Python, Lisp Xah Lee <xahlee@gmail.com> - 2012-03-02 03:30 -0800
  Re: lang comparison: in-place algorithm for reversing a list in Perl, Python, Lisp Rainer Weikusat <rweikusat@mssgmbh.com> - 2012-03-01 14:39 +0000
  Re: lang comparison: in-place algorithm for reversing a list in Perl,Python, Lisp "WJ" <w_a_x_man@yahoo.com> - 2012-03-02 07:17 +0000

csiph-web