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Re: Lucky numbers in Python

References <87lhhabxod.fsf@Equus.decebal.nl> <mailman.95.1430337506.3680.python-list@python.org> <87d22mbod7.fsf@Equus.decebal.nl>
From Ian Kelly <ian.g.kelly@gmail.com>
Date 2015-04-29 16:38 -0600
Subject Re: Lucky numbers in Python
Newsgroups comp.lang.python
Message-ID <mailman.103.1430347166.3680.python-list@python.org> (permalink)

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On Wed, Apr 29, 2015 at 3:45 PM, Cecil Westerhof <Cecil@decebal.nl> wrote:
> Op Wednesday 29 Apr 2015 21:57 CEST schreef Ian Kelly:
>> And although it's not clear to me what this is supposed to be doing,
>> you probably no longer need the middle term if the intention is to
>> continue deleting all the way to the end of the list (if it is then
>> I think you have a bug in the existing implementation, since the
>> last item in the list can never be deleted).
>
> What do you mean by this? Executing:
>     lucky_numbers(5)
> gives:
>     [1, 3]
>
> So the last element (5) is deleted.

Off by one error on my part. This is why negative skip values on
ranges and slices are not recommended: they're confusing. :-)

In that case you can definitely omit the middle term of the slice,
which will be both more concise and clearer in intent, though probably
not significantly faster.

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Thread

Lucky numbers in Python Cecil Westerhof <Cecil@decebal.nl> - 2015-04-29 20:24 +0200
  Re: Lucky numbers in Python Ian Kelly <ian.g.kelly@gmail.com> - 2015-04-29 13:57 -0600
    Re: Lucky numbers in Python Cecil Westerhof <Cecil@decebal.nl> - 2015-04-29 23:45 +0200
      Re: Lucky numbers in Python Ian Kelly <ian.g.kelly@gmail.com> - 2015-04-29 16:38 -0600
        Re: Lucky numbers in Python Cecil Westerhof <Cecil@decebal.nl> - 2015-04-30 02:01 +0200
          Re: Lucky numbers in Python Ian Kelly <ian.g.kelly@gmail.com> - 2015-04-29 20:55 -0600
            Re: Lucky numbers in Python Cecil Westerhof <Cecil@decebal.nl> - 2015-04-30 08:34 +0200
      Re: Lucky numbers in Python Chris Kaynor <ckaynor@zindagigames.com> - 2015-04-29 15:56 -0700
    Re: Lucky numbers in Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-04-30 10:11 +1000
      Re: Lucky numbers in Python Ian Kelly <ian.g.kelly@gmail.com> - 2015-04-29 21:08 -0600
  Re: Lucky numbers in Python Cecil Westerhof <Cecil@decebal.nl> - 2015-04-30 20:55 +0200
    Re: Lucky numbers in Python Dave Angel <davea@davea.name> - 2015-04-30 15:28 -0400

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