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.   
   ---   
    * Origin:  (1:3634/12.73)