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Re: bit count or bit set && Python3

References <5089511E.4090009@earthlink.net> <k6bllq$3gt$1@ger.gmane.org> <mailman.2849.1351179123.27098.python-list@python.org> <50896152$0$29978$c3e8da3$5496439d@news.astraweb.com> <aetk2pFsd2rU3@mid.individual.net>
From Ian Kelly <ian.g.kelly@gmail.com>
Date 2012-10-25 14:20 -0600
Subject Re: bit count or bit set && Python3
Newsgroups comp.lang.python
Message-ID <mailman.2864.1351196432.27098.python-list@python.org> (permalink)

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On Thu, Oct 25, 2012 at 2:00 PM, Neil Cerutti <neilc@norwich.edu> wrote:
> Yes indeed! Python string operations are fast enough and its
> arithmetic slow enough that I no longer assume I can beat a neat
> lexicographical solution. Try defeating the following with
> arithmetic:
>
> def is_palindrom(n):
>    s = str(n)
>    return s = s[::-1]

Problems like these are fundamentally string problems, not math
problems.  The question being asked isn't about some essential
property of the number,  but about its digital representation.
Certainly they can be reasoned about mathematically, but the fact
remains that the math being done is about the properties of strings.

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Re: bit count or bit set && Python3 Chris Angelico <rosuav@gmail.com> - 2012-10-26 02:31 +1100
  Re: bit count or bit set && Python3 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-25 15:57 +0000
    Re: bit count or bit set && Python3 rusi <rustompmody@gmail.com> - 2012-10-25 09:17 -0700
      Re: bit count or bit set && Python3 Chris Angelico <rosuav@gmail.com> - 2012-10-26 03:29 +1100
        Re: bit count or bit set && Python3 rusi <rustompmody@gmail.com> - 2012-10-25 09:37 -0700
      Re: bit count or bit set && Python3 Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-10-25 17:44 +0100
      Re: bit count or bit set && Python3 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-25 17:16 +0000
    Re: bit count or bit set && Python3 Serhiy Storchaka <storchaka@gmail.com> - 2012-10-25 22:07 +0300
    Re: bit count or bit set && Python3 Neil Cerutti <neilc@norwich.edu> - 2012-10-25 20:00 +0000
      Re: bit count or bit set && Python3 Neil Cerutti <neilc@norwich.edu> - 2012-10-25 20:04 +0000
      Re: bit count or bit set && Python3 Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-25 14:20 -0600
        Re: bit count or bit set && Python3 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-25 23:48 +0000
        Re: bit count or bit set && Python3 Neil Cerutti <neilc@norwich.edu> - 2012-10-26 12:56 +0000
    Re: bit count or bit set && Python3 Charles Hixson <charleshixsn@earthlink.net> - 2012-10-25 09:08 -0700
    Re: bit count or bit set && Python3 Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-10-25 22:51 +0100

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