unofficial mirror of help-gnu-emacs@gnu.org
 help / color / mirror / Atom feed
From: Drew Adams <drew.adams@oracle.com>
To: Stephen Berman <stephen.berman@gmx.net>, help-gnu-emacs@gnu.org
Subject: RE: count char in string [The Emacs Challenge Competition - round 2,  with fallout]
Date: Thu, 29 Oct 2020 09:13:55 -0700 (PDT)	[thread overview]
Message-ID: <a45e295e-856b-4a66-9042-b3b2d37885d4@default> (raw)
In-Reply-To: <87k0v9fhbi.fsf@rub.de>

> cl-count? seq-count? seq-reduce? KISS!
> 
> (defun count-char-in-string (char str)
>   "Return number of occurrences of character CHAR in string STR."
>   (let ((count 0))
>     (dotimes (i (length str) count)
>       (when (eq char (aref str i))
> 	(setq count (1+ count))))))

+1.

Or just (cl-incf count) at the end, if you're
loading `cl-lib.el' anyway, for other reasons.



  reply	other threads:[~2020-10-29 16:13 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-28  0:42 count char in string [The Emacs Challenge Competition - round 2, with fallout] Emanuel Berg via Users list for the GNU Emacs text editor
2020-10-28  8:04 ` Corwin Brust
2020-10-28 17:19   ` Noam Postavsky
2020-10-29  1:15     ` Corwin Brust
2020-11-29  3:44       ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-11-28  1:26   ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-11-28 17:40     ` Benjamín Buccianti
2020-10-29  1:46 ` Benjamín Buccianti
2020-10-29 10:38 ` Stephen Berman
2020-10-29 16:13   ` Drew Adams [this message]
2020-10-29 13:53 ` Patrick McAllister
2020-10-29 17:52   ` Leo Butler
2020-10-29 22:44     ` Jean Louis
2020-10-30 11:09       ` Leo Butler
2020-10-30 11:36         ` Joost Kremers
2020-10-30 11:53         ` Jean Louis

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: https://www.gnu.org/software/emacs/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=a45e295e-856b-4a66-9042-b3b2d37885d4@default \
    --to=drew.adams@oracle.com \
    --cc=help-gnu-emacs@gnu.org \
    --cc=stephen.berman@gmx.net \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).