From: Bastien <bzg@gnu.org>
To: Tassilo Horn <tassilo@member.fsf.org>
Cc: Juanma Barranquero <lekktu@gmail.com>,
Stefan Monnier <monnier@IRO.UMontreal.CA>,
emacs-devel@gnu.org
Subject: Re: Why (substring "abc" 0 4) does not return "abc" instead of an error?
Date: Mon, 16 Jul 2012 21:43:52 +0200 [thread overview]
Message-ID: <87ehobsd8n.fsf@gnu.org> (raw)
In-Reply-To: <87obnfse3n.fsf@gnu.org> (Bastien's message of "Mon, 16 Jul 2012 21:25:16 +0200")
Bastien <bzg@gnu.org> writes:
> (defun string-tail (string n)
> "Return N characters starting from the end of STRING.
> If N is larger than the length of STRING, return it."
> (let* ((l (length string))
> (s (- l n))
> (d (if (> s 0) s 0)))
> (substring string d l)))
Or simpler:
(defun string-tail (string n)
(let ((l (length string)))
(if (> n l)
string
(substring string (- l n) l))))
--
Bastien
next prev parent reply other threads:[~2012-07-16 19:43 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-15 23:15 Why (substring "abc" 0 4) does not return "abc" instead of an error? Bastien
2012-07-15 23:29 ` Juanma Barranquero
2012-07-15 23:59 ` Bastien
2012-07-16 0:10 ` Juanma Barranquero
2012-07-16 7:14 ` Bastien
2012-07-16 16:15 ` Stefan Monnier
2012-07-16 16:22 ` Bastien
2012-07-16 16:46 ` Bastien
2012-07-16 17:57 ` Tassilo Horn
2012-07-16 18:51 ` Lars Magne Ingebrigtsen
2012-07-16 19:30 ` Bastien
2012-07-16 19:30 ` Tassilo Horn
2012-07-16 20:20 ` Pascal J. Bourguignon
2012-07-16 19:25 ` Bastien
2012-07-16 19:43 ` Bastien [this message]
2012-07-16 20:19 ` Pascal J. Bourguignon
2012-07-16 20:30 ` Stefan Monnier
2012-07-16 22:28 ` Lennart Borgman
2012-07-16 22:48 ` Bastien
2012-07-16 22:53 ` Lennart Borgman
2012-07-16 7:38 ` Andreas Schwab
2012-07-16 9:40 ` Juanma Barranquero
-- strict thread matches above, loose matches on Subject: below --
2012-07-16 3:45 Dmitry Gutov
2012-07-16 7:32 ` Bastien
2012-07-16 7:52 ` Thierry Volpiatto
2012-07-16 8:38 ` Bastien
2012-07-16 13:03 ` Dmitry Gutov
2012-07-16 14:32 ` Bastien
2012-07-16 13:10 ` Pascal J. Bourguignon
2012-07-16 14:40 ` Bastien
2012-07-16 15:00 ` Pascal J. Bourguignon
2012-07-16 15:07 ` Lennart Borgman
2012-07-16 15:19 ` Pascal J. Bourguignon
2012-07-16 15:22 ` Bastien
2012-07-16 15:46 ` Bastien
2012-07-16 15:49 ` Bastien
2012-07-16 19:49 ` Thien-Thi Nguyen
2012-07-16 22:32 ` Bastien
2012-07-16 15:56 ` Pascal J. Bourguignon
2012-07-16 16:13 ` Bastien
2012-07-16 19:00 Dmitry Gutov
2012-07-16 19:51 ` Tassilo Horn
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