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From: Corwin Brust <corwin@bru.st>
To: Emanuel Berg <moasenwood@zoho.eu>, help-gnu-emacs@gnu.org
Subject: Re: count char in string [The Emacs Challenge Competition - round 2,  with fallout]
Date: Wed, 28 Oct 2020 03:04:09 -0500	[thread overview]
Message-ID: <CAJf-WoTeZPODzMmKLqBxoLpCnEw7vmpLSdeu_=EpOtkd5tJvMg@mail.gmail.com> (raw)
In-Reply-To: <87r1pj41wa.fsf@zoho.eu>

We who are about to be educated salute you ;)

On Tue, Oct 27, 2020 at 7:42 PM Emanuel Berg via Users list for the
GNU Emacs text editor <help-gnu-emacs@gnu.org> wrote:
>
> round 2:
>
> Very simple: we are looking for a function that returns the number of
> occurrences of a char in a string.

(defun count-char-in-string (string char)
     "Return the number of occurances of CHAR in STRING."
     (seq-count (apply-partially 'eq char)
            (seq-into string 'list)))

(count-char-in-string "hii" ?I) ;; ⇒ 2

Cheers!
Corwin



  reply	other threads:[~2020-10-28  8:04 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 [this message]
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
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

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