[Issue 10670] std.algorithm.reduce: no-seed initialization wrong design
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Mon Jul 22 04:55:08 PDT 2013
http://d.puremagic.com/issues/show_bug.cgi?id=10670
bearophile_hugs at eml.cc changed:
What |Removed |Added
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CC| |bearophile_hugs at eml.cc
--- Comment #4 from bearophile_hugs at eml.cc 2013-07-22 04:55:04 PDT ---
(In reply to comment #2)
> In the case of floats, well... I'd argue that using the seedless variety of
> reduce on a float range is already a bug,
I don't think it's a bug, this is Python:
>>> a = [2.0, 3.0, 4.0]
>>> reduce(lambda x, y: x * y, a)
24.0
I have a ton of D code that relies on such behavour of D reduce.
I suggest to just swap the seed and sequence arguments of reduce, to support
UFCS chains, and leave the rest of reduce as it is.
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