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From: Chris Rebert <pyid...@rebertia.com>
Date: Sun, 22 Jul 2012 21:39:13 -0700
Local: Mon, Jul 23 2012 12:39 am
Subject: Re: [Python-ideas] Provide a 'key' argument for all() and any() builtins
On Sun, Jul 22, 2012 at 9:03 PM, Giampaolo Rodolà <g.rod...@gmail.com> wrote: You're missing some brackets or parens there: > This would be similar to 'key' argument already available for min(), max() > and sorted() and would let user decide what must be considered True and what > not. > Some use cases: > all(a, b, c, ... key=callable) all([a, b, c, ...], key=callable) <snip> > Thoughts? I see negligible advantage over just writing the generator expression directly: all(callable(item) for item in iterable) === all(iterable, key=callable) (which is about comparable to the difference between a map() invocation vs. a list comprehension, and the choice there seems to be largely a matter of taste) min() & max() return the result object satisfying the constraint, so Cheers, You must Sign in before you can post messages.
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