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Re: Emacs insert empty string


From: Deniz Dogan
Subject: Re: Emacs insert empty string
Date: Thu, 24 Mar 2011 11:38:52 +0100

2011/3/24 Peter Dyballa <address@hidden>:
>
> 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



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