From: Eli Zaretskii <eliz@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: How to count the number of occurrences of a character in a string?
Date: Tue, 13 Oct 2015 20:41:45 +0300 [thread overview]
Message-ID: <83zizmy8bq.fsf@gnu.org> (raw)
In-Reply-To: <8337xezpdc.fsf@gnu.org>
> Date: Tue, 13 Oct 2015 19:48:15 +0300
> From: Eli Zaretskii <eliz@gnu.org>
>
> Isn't the following simpler?
>
> (let ((str-list (append str nil))
> (num-matches 0))
> (while str-list
> (if (= (car str-list) char)
> (setq num-matches (1+ num-matches)))
> (setq str-list (cdr str-list)))
> num-matches)
Which could be made even more elegant (and faster, I guess) by using
'mapc', of course.
next prev parent reply other threads:[~2015-10-13 17:41 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-12 19:45 How to count the number of occurrences of a character in a string? Marcin Borkowski
2015-10-12 21:43 ` Kaushal Modi
2015-10-12 23:27 ` Nick Dokos
2015-10-13 1:18 ` Stefan Monnier
2015-10-13 16:06 ` Kaushal Modi
2015-10-13 16:31 ` Kaushal Modi
2015-10-13 16:48 ` Eli Zaretskii
2015-10-13 17:41 ` Eli Zaretskii [this message]
2015-10-13 17:43 ` Kaushal Modi
2015-10-13 19:07 ` Eli Zaretskii
2015-10-13 19:56 ` Kaushal Modi
2015-10-13 20:17 ` Eli Zaretskii
2015-10-13 20:41 ` Kaushal Modi
[not found] ` <mailman.267.1444767491.7904.help-gnu-emacs@gnu.org>
2015-10-13 20:46 ` Brendan Halpin
2015-10-13 21:07 ` Kaushal Modi
[not found] ` <mailman.273.1444770543.7904.help-gnu-emacs@gnu.org>
2015-10-13 22:44 ` Joost Kremers
2015-10-14 10:04 ` Oleh Krehel
2015-10-14 17:06 ` Eli Zaretskii
2015-10-13 20:43 ` Michael Heerdegen
2015-10-13 20:59 ` Charles Curley
2015-10-14 18:19 ` Noam Postavsky
2015-10-14 20:00 ` Kaushal Modi
2015-10-13 22:00 ` Emanuel Berg
[not found] <mailman.164.1444679125.7904.help-gnu-emacs@gnu.org>
2015-10-12 23:35 ` Joost Kremers
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