From: "Clément Pit--Claudel" <clement.pit@gmail.com>
To: 24014@debbugs.gnu.org
Subject: bug#24014: 24.5; doc string of `cl-reduce'
Date: Mon, 18 Jul 2016 10:54:21 +0200 [thread overview]
Message-ID: <578C993D.10507@gmail.com> (raw)
In-Reply-To: <cbe75c95-be32-4349-992a-b72b1b785de6@default>
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On 2016-07-18 06:41, Drew Adams wrote:
> Even providing a functional-programming definition of `reduce' is
> better than just describing it in abstract terms, if we can't come
> up with a more down-to-earth description.
What about adding a few examples? Something like this maybe?
(cl-reduce f '(1 2 3 4 5))
↔ (f (f (f (f 1 2) 3) 4) 5)
(cl-reduce f '(1 2 3 4 5) :initial-value 0)
↔ (f (f (f (f (f 0 1) 2) 3) 4) 5)
(cl-reduce f '(1 2 3 4 5) :from-end t)
↔ (f 1 (f 2 (f 3 (f 4 5))))
(cl-reduce f '(1 2 3 4 5) :from-end t :initial-value 0)
↔ (f 1 (f 2 (f 3 (f 4 (f 5 0)))))
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next prev parent reply other threads:[~2016-07-18 8:54 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-17 14:55 bug#24014: 24.5; doc string of `cl-reduce' Drew Adams
2016-07-17 15:57 ` Michael Heerdegen
2016-07-17 21:18 ` Nicolas Petton
2016-07-18 4:44 ` Drew Adams
2016-07-18 12:19 ` Nicolas Petton
2021-10-23 17:32 ` Stefan Kangas
2016-07-18 4:41 ` Drew Adams
2016-07-18 8:54 ` Clément Pit--Claudel [this message]
2016-07-18 14:02 ` Drew Adams
2016-07-18 16:03 ` Clément Pit--Claudel
2016-07-18 17:28 ` Drew Adams
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