PyWart: Language missing maximum constant of numeric types!
ian.g.kelly at gmail.com
Fri Feb 24 20:26:42 EST 2012
On Fri, Feb 24, 2012 at 10:32 AM, Devin Jeanpierre
<jeanpierreda at gmail.com> wrote:
> On Fri, Feb 24, 2012 at 9:25 AM, Neil Cerutti <neilc at 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:
> def closest_object():
> for x in xrange(board_width)
> for y in xrange(board_height):
> entity = board.get_entity(x, y)
> except EntityNotFound:
> yield distance(player.pos, entity.pos), entity
Cute, but what's so terrible about:
for x in xrange(board_width):
for y in xrange(board_height):
yield board.get_entity(x, y)
closest_object = min(all_entities,
key=lambda e: distance(player.pos, e.pos))
Especially given that all_entities should be reusable in other contexts.
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