GNU bug report logs - #24014
24.5; doc string of `cl-reduce'

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Package: emacs;

Reported by: Drew Adams <drew.adams <at> oracle.com>

Date: Sun, 17 Jul 2016 14:56:01 UTC

Severity: minor

Found in version 24.5

Fixed in version 28.1

Done: Stefan Kangas <stefan <at> marxist.se>

Bug is archived. No further changes may be made.

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From: Nicolas Petton <nicolas <at> petton.fr>
To: Michael Heerdegen <michael_heerdegen <at> web.de>, Drew Adams <drew.adams <at> oracle.com>
Cc: 24014 <at> debbugs.gnu.org
Subject: bug#24014: 24.5; doc string of `cl-reduce'
Date: Sun, 17 Jul 2016 23:18:12 +0200

[Message part 1 (text/plain, inline)]
Michael Heerdegen <michael_heerdegen <at> web.de> writes:

> Drew Adams <drew.adams <at> oracle.com> writes:
>
>> Please state in the doc string what the function does.  IOW,
>> explain/describe/specify what "reduce" means.  Do not suppose that Emacs
>> Lisp users are all familiar with functional programming etc.

The documentation of `seq-reduce' is probably not perfect, but at least
it tries to explain what reducing means:

    Return the result of calling FUNCTION with INITIAL-VALUE and the
    first element of SEQUENCE, then calling FUNCTION with that result and
    the second element of SEQUENCE, then with that result and the third
    element of SEQUENCE, etc.

    If SEQUENCE is empty, return INITIAL-VALUE and FUNCTION is not called.

Nico

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