Subj : BBBS is the most generous BBS Ever :-)
To   : Allen Prunty
From : mark lewis
Date : Wed Mar 15 2017 11:34:24


 On 2017 Mar 15 04:34:46, you wrote to me:

 AP> What OS is Regex most common in and from what I see it's a VERY powerful
 AP> Query system almost like SQL in a way.  I'm intrigued by what it can do 
and
 AP> once I know what OS it is drived from I'll ask more about it in that OS's
 AP> echo.

regex is not limited to any particular OS... one might say it comes from the 
*nix type world where the mantra is "do one thing and do it well"... however, 
i've used regex on winwhatever for several decades... as for "do one thing and 
do it well", regex is used to look for matches to a search pattern, the 
regex...

[quote]
Regular expressions originated in 1956, when mathematician Stephen Cole Kleene 
described regular languages using his mathematical notation called regular 
sets. ... Regexes were subsequently adopted by a wide range of programs, with 
these early forms standardized in the POSIX.2 standard in 1992.
[/quote]

https://en.wikipedia.org/wiki/Regular_expression


[quote]
A regular expression, regex or regexp[1] (sometimes called a rational 
expression)[2][3] is, in theoretical computer science and formal language 
theory, a sequence of characters that define a search pattern. Usually this 
pattern is then used by string searching algorithms for "find" or "find and 
replace" operations on strings.

The concept arose in the 1950s when the American mathematician Stephen Cole 
Kleene formalized the description of a regular language. The concept came into 
common use with Unix text-processing utilities. Today, different syntaxes for 
writing regular expressions exist, one being the POSIX standard and another, 
widely used, being the Perl syntax.

Regular expressions are used in search engines, search and replace dialogs of 
word processors and text editors, in text processing utilities such as sed and 
AWK and in lexical analysis. Many programming languages provide regex 
capabilities, built-in, or via libraries.

[...]

[1] What Regular Expressions Are Exactly - Terminology

[2] Ruslan Mitkov (2003). The Oxford Handbook of Computational Linguistics. 
Oxford University Press. p. 754. ISBN 978-0-19-927634-9.

[3] Mark V. Lawson (17 September 2003). Finite Automata. CRC Press. pp. 98-100. 
ISBN 978-1-58488-255-8.
[/quote]



)\/(ark

Always Mount a Scratch Monkey
Do you manage your own servers? If you are not running an IDS/IPS yer doin' it 
wrong...
.... Limitations are stepping stones to creativity.
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 * Origin:  (1:3634/12.73)

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