[erlang-questions] regular expressions (again :)

Gaspar Chilingarov <>
Thu Dec 14 05:09:43 CET 2006


Richard A. O'Keefe wrote:
> Gaspar Chilingarov <> wrote:
> 	In most text-processing tasks you do not need exactly same
> 	regexp second time.
> 
> Whaaaat?  When I use AWK, my regular expressions may get applied
> MILLIONS of times!  I want them compiled just once, thank you very much!
> 
> More generally, people who have been brainwashed by AWK and Perl think
> of a regular expression as a kind of TOKEN instead of as a kind of
> EXPRESSION.  If you have a language (like SNOBOL) in which concatenation
> and alternation and so on a genuine operators that can be applied to
> computed values, then you very often find that one pattern can be used
> *as a building block* in making many other patterns.
> 
> I note that having a regular expression compiler that returns a function
> is a popular approach in Scheme.

Hmm, well, thanks a lot for that discussion and review!

I'll try to come up with something more reasonable ;)))))

/Gaspar

-- 
Gaspar Chilingarov

System Administrator,
Network security consulting

t +37493 419763 (mob)
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