From: Bastien <bzg@gnu.org>
To: Juanma Barranquero <lekktu@gmail.com>
Cc: emacs-devel@gnu.org
Subject: Re: Why (substring "abc" 0 4) does not return "abc" instead of an error?
Date: Mon, 16 Jul 2012 01:59:38 +0200 [thread overview]
Message-ID: <877gu4mv85.fsf@gnu.org> (raw)
In-Reply-To: <CAAeL0SQxD56Uhe7JNgn7w6=T-9uEo-VQAMfveAsJffi+PkruRg@mail.gmail.com> (Juanma Barranquero's message of "Mon, 16 Jul 2012 01:29:34 +0200")
Juanma Barranquero <lekktu@gmail.com> writes:
> On Mon, Jul 16, 2012 at 1:15 AM, Bastien <bzg@gnu.org> wrote:
>
>> As the subject says: I wonder why
>>
>> (substring "abc" 0 4)
>>
>> does not return "abc".
>
> Why should it? How it is different from (aref "abc" 4)?
I read (aref "abc" 4) as "return the 5th element of "abc"".
So I expect an error here.
I read (substring "abc" 0 4) as "return the biggest substring
between 0 and 4" -- even if the string does not have 4 characters.
Surely I misread, but this would be handy in some cases, instead
of using something like (format "%.4s" "abc").
--
Bastien
next prev parent reply other threads:[~2012-07-15 23:59 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 [this message]
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
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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