From: Deniz Dogan <deniz.a.m.dogan@gmail.com>
To: Peter Dyballa <Peter_Dyballa@web.de>
Cc: Kenneth Brun Nielsen <kenneth.brun.nielsen@gmail.com>,
help-gnu-emacs@gnu.org
Subject: Re: Emacs insert empty string
Date: Thu, 24 Mar 2011 11:38:52 +0100 [thread overview]
Message-ID: <AANLkTikMAr==W5Xw07277DNKSPayTJc_sqCN_qQKd7VG@mail.gmail.com> (raw)
In-Reply-To: <3AD1412A-B555-48B2-9F41-B2C593E956A1@Web.DE>
2011/3/24 Peter Dyballa <Peter_Dyballa@web.de>:
>
> Am 24.03.2011 um 02:46 schrieb Kenneth Brun Nielsen:
>
>> How can I insert an empty string?
>
>
> What is "an empty string?" Can you exactly and comprehensively describe
> this? Is it defined in Wikipedia? And give us a few examples?
>
http://en.wikipedia.org/wiki/Empty_string
Cited:
"In computer science and formal language theory, the empty string (or
null string)[1] is the unique string of length zero. It is denoted
with λ or sometimes Λ or ε.
The empty string is distinct from a null reference in that in an
object-oriented programming language a null reference to a string type
doesn't point to a string object and will cause an error were one to
try to perform any operation on it. The empty string is still a string
upon which string operations may be attempted.
A related concept is the empty language ∅, a formal language that
contains no strings."
--
Deniz Dogan
next prev parent reply other threads:[~2011-03-24 10:38 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-24 1:46 Emacs insert empty string Kenneth Brun Nielsen
2011-03-24 4:47 ` PJ Weisberg
2011-03-24 9:49 ` Peter Dyballa
2011-03-24 10:38 ` Deniz Dogan [this message]
[not found] ` <mailman.1.1300942046.7157.help-gnu-emacs@gnu.org>
2011-03-24 10:11 ` Kenneth Brun Nielsen
2011-03-24 10:42 ` Deniz Dogan
[not found] ` <mailman.20.1300963398.32450.help-gnu-emacs@gnu.org>
2011-03-24 10:56 ` Kenneth Brun Nielsen
2011-03-24 11:50 ` Le Wang
2011-03-24 10:55 ` Kenneth Brun Nielsen
[not found] ` <mailman.11.1300960156.32450.help-gnu-emacs@gnu.org>
2011-03-24 10:25 ` Kenneth Brun Nielsen
2011-03-24 10:50 ` Deniz Dogan
[not found] ` <mailman.0.1300963850.24982.help-gnu-emacs@gnu.org>
2011-03-24 10:59 ` Kenneth Brun Nielsen
2011-03-24 11:09 ` Peter Dyballa
[not found] ` <mailman.2.1300964974.24982.help-gnu-emacs@gnu.org>
2011-03-24 11:11 ` Kenneth Brun Nielsen
2011-03-24 11:12 ` David Kastrup
2011-03-24 11:18 ` Peter Dyballa
[not found] ` <mailman.3.1300965524.24982.help-gnu-emacs@gnu.org>
2011-03-24 11:24 ` David Kastrup
2011-03-24 13:21 ` Peter Dyballa
2011-03-24 13:44 ` David Kastrup
2011-03-24 15:18 ` Peter Dyballa
2011-03-24 11:53 ` Tassilo Horn
[not found] ` <mailman.6.1300967618.24982.help-gnu-emacs@gnu.org>
2011-03-24 12:02 ` Kenneth Brun Nielsen
2011-03-24 21:27 ` Ilya Zakharevich
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