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regular expressions [message #15713]

Fri, 04 June 1999 00:00

Michael Werger
Messages: 34
Registered: May 1997

Member

Dear IDL'ers

for a complex batch processing in IDL I need to do some regular
expression handling. Of course I can do this like:

function regexp_match,argument,pattern
defsysv,!true, 1 eq 1 ; defined here only for completeness
defsysv,!false, 1 eq 0 ; see above

command='perl -e ''print ("'+argument+'" =~ m/'+pattern+'/)'''
spawn,command,result
if (result[0] eq 1) then result = !true else result = !false
return,result
end

and then in some code:

if regexp_match(string,'\s*\d+') then print,'(spaces and) digits found!'

but this is rather slow, requires perl to be setup properly and
so on. Did anyone already wrote some routines like
regexp_replace and regexp_match (I think these names are speaking
for themselves? - like the tcl routines regsub and regexp?

Suggestions to improve the above routine are also welcome.

--
Michael Werger ------------o
ESA ESTEC & Praesepe B.V. |
Astrophysics Division mwerger@astro.estec.esa.nl|
| Postbus 299 http://astro.estec.esa.nl |
| 2200 AG Noordwijk +31 71 565 3783 (Voice)
o------------------- The Netherlands +31 71 565 4690 (FAX)

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[Message index]

		regular expressions By: Michael Werger on Fri, 04 June 1999 00:00
		Re: Regular expressions By: Brian Jackel on Fri, 10 November 2000 00:00
		Re: Regular expressions By: Martin Schultz on Fri, 10 November 2000 00:00
		Re: Regular expressions By: Liam E. Gumley on Fri, 10 November 2000 00:00
		Re: Regular Expressions By: John-David T. Smith on Thu, 15 March 2001 16:09
		Re: Regular Expressions By: Wayne Landsman on Thu, 15 March 2001 19:24
		Re: Regular Expressions By: John-David T. Smith on Fri, 16 March 2001 09:20
		Re: Regular Expressions By: Pavel A. Romashkin on Mon, 19 March 2001 13:52
		Re: Regular Expressions By: Craig Markwardt on Tue, 20 March 2001 15:23
		Re: Regular Expressions By: John-David T. Smith on Tue, 20 March 2001 15:28
		Re: Regular Expressions By: Mark Hadfield on Tue, 20 March 2001 14:48
		Re: Regular Expressions By: Wayne Landsman on Tue, 20 March 2001 12:14
		Re: Regular Expressions By: Martin Schultz on Tue, 20 March 2001 04:39

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