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Groups > comp.lang.python > #20848
| References | <8c2096d9-3cc2-4b64-8f11-c1d958d94243@x19g2000yqh.googlegroups.com> <9qpkvkFberU1@mid.individual.net> <CABicbJJrBQiiexVHTpDQW91jmmUAWaOYU-puKJsfuDSyXtRZbw@mail.gmail.com> |
|---|---|
| From | Ian Kelly <ian.g.kelly@gmail.com> |
| Date | 2012-02-24 18:26 -0700 |
| Subject | Re: PyWart: Language missing maximum constant of numeric types! |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.151.1330133234.3037.python-list@python.org> (permalink) |
On Fri, Feb 24, 2012 at 10:32 AM, Devin Jeanpierre
<jeanpierreda@gmail.com> wrote:
> On Fri, Feb 24, 2012 at 9:25 AM, Neil Cerutti <neilc@norwich.edu> wrote:
>> The only time I've naively pined for such a thing is when
>> misapplying C idioms for finding a minimum value.
>>
>> Python provides an excellent min implementation to use instead.
>
> min can be a little inconvenient. As soon as anything complicated has
> to be done during the min expression, you need to switch to using
> something else for sanity's sake. In that vein, I do actually
> sometimes use float('inf') (for numbers), or a custom max/min object.
>
> ----
>
> Silly and completely nonserious addendum:
>
> Forgive me, I have spoken in error! min is the one true way, for you
> can still do it with a little wrangling, as follows:
>
> @operator.itemgetter(1)
> @min
> @apply
> def closest_object():
> for x in xrange(board_width)
> for y in xrange(board_height):
> try:
> entity = board.get_entity(x, y)
> except EntityNotFound:
> pass
> else:
> yield distance(player.pos, entity.pos), entity
Cute, but what's so terrible about:
def all_entities():
for x in xrange(board_width):
for y in xrange(board_height):
try:
yield board.get_entity(x, y)
except EntityNotFound:
pass
closest_object = min(all_entities,
key=lambda e: distance(player.pos, e.pos))
Especially given that all_entities should be reusable in other contexts.
Cheers,
Ian
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PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-24 05:37 -0800
Re: PyWart: Language missing maximum constant of numeric types! Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-02-24 13:55 +0000
Re: PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-24 06:14 -0800
Re: PyWart: Language missing maximum constant of numeric types! Neil Cerutti <neilc@norwich.edu> - 2012-02-24 14:25 +0000
Re: PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-24 07:25 -0800
Re: PyWart: Language missing maximum constant of numeric types! Devin Jeanpierre <jeanpierreda@gmail.com> - 2012-02-24 12:32 -0500
Re: PyWart: Language missing maximum constant of numeric types! Ian Kelly <ian.g.kelly@gmail.com> - 2012-02-24 18:26 -0700
Re: PyWart: Language missing maximum constant of numeric types! Miki Tebeka <miki.tebeka@gmail.com> - 2012-02-24 06:39 -0800
Re: PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-24 07:18 -0800
Re: PyWart: Language missing maximum constant of numeric types! Mel Wilson <mwilson@the-wire.com> - 2012-02-24 10:21 -0500
Re: PyWart: Language missing maximum constant of numeric types! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-02-24 15:31 +0000
Re: PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-24 07:34 -0800
Re: PyWart: Language missing maximum constant of numeric types! Michael Torrie <torriem@gmail.com> - 2012-02-24 09:23 -0700
Re: PyWart: Language missing maximum constant of numeric types! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-02-24 22:45 +0000
Re: PyWart: Language missing maximum constant of numeric types! Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-02-24 16:59 +0000
Re: PyWart: Language missing maximum constant of numeric types! Michael Torrie <torriem@gmail.com> - 2012-02-24 16:16 -0700
Re: PyWart: Language missing maximum constant of numeric types! Chris Angelico <rosuav@gmail.com> - 2012-02-25 11:09 +1100
Re: PyWart: Language missing maximum constant of numeric types! Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-02-25 00:35 +0000
Re: PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-25 12:25 -0800
Re: PyWart: Language missing maximum constant of numeric types! MRAB <python@mrabarnett.plus.com> - 2012-02-25 00:37 +0000
Re: PyWart: Language missing maximum constant of numeric types! Serhiy Storchaka <storchaka@gmail.com> - 2012-02-25 17:32 +0200
Re: PyWart: Language missing maximum constant of numeric types! Fayaz Yusuf Khan <fayaz.yusuf.khan@gmail.com> - 2012-02-25 06:52 +0530
Re: PyWart: Language missing maximum constant of numeric types! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-02-25 01:50 +0000
Re: PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-25 12:29 -0800
Re: PyWart: Language missing maximum constant of numeric types! alex23 <wuwei23@gmail.com> - 2012-02-26 18:32 -0800
Re: PyWart: Language missing maximum constant of numeric types! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-02-27 03:51 +0000
Re: PyWart: Language missing maximum constant of numeric types! Chris Angelico <rosuav@gmail.com> - 2012-02-27 14:59 +1100
Re: PyWart: Language missing maximum constant of numeric types! alex23 <wuwei23@gmail.com> - 2012-02-26 22:49 -0800
Re: PyWart: Language missing maximum constant of numeric types! Wolfgang Meiners <WolfgangMeiners01@web.de> - 2012-02-25 09:18 +0100
Re: PyWart: Language missing maximum constant of numeric types! MRAB <python@mrabarnett.plus.com> - 2012-02-25 17:54 +0000
Re: PyWart: Language missing maximum constant of numeric types! Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-25 12:35 -0800
Re: PyWart: Language missing maximum constant of numeric types! Wolfgang Meiners <WolfgangMeiners01@web.de> - 2012-02-26 14:16 +0100
Re: PyWart: Language missing maximum constant of numeric types! Wolfgang Meiners <WolfgangMeiners01@web.de> - 2012-02-26 14:38 +0100
Re: PyWart: Language missing maximum constant of numeric types! Arnaud Delobelle <arnodel@gmail.com> - 2012-02-26 13:44 +0000
Re: PyWart: Language missing maximum constant of numeric types! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-02-26 13:50 +0000
Re: PyWart: Language missing maximum constant of numeric types! Neil Cerutti <neilc@norwich.edu> - 2012-02-27 12:25 +0000
Re: PyWart: Language missing maximum constant of numeric types! Jean-Michel Pichavant <jeanmichel@sequans.com> - 2012-02-27 12:55 +0100
Re: PyWart: Language missing maximum constant of numeric types! Wolfgang Meiners <WolfgangMeiners01@web.de> - 2012-02-26 12:56 +0100
Re: PyWart: Language missing maximum constant of numeric types! Chris Angelico <rosuav@gmail.com> - 2012-02-26 23:52 +1100
Re: PyWart: Language missing maximum constant of numeric types! Wolfgang Meiners <WolfgangMeiners01@web.de> - 2012-02-26 14:32 +0100
Re: PyWart: Language missing maximum constant of numeric types! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-02-26 13:19 +0000
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