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Re: bug in stregex? [message #31529 is a reply to message #31526]

Fri, 19 July 2002 15:16

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

Vapuser <vapuser@catspaw.jpl.nasa.gov> writes:
> I don't you, you tell me. Is this a bug?
>
> IDL> tt=stregex('cdefaz',"(.*)(a|b|c)z",/extract)
> IDL> help,tt
> TT STRING = 'cdefaz'
>
> My understanding of regular expressions says it's a bug. The first
> '(.*)' should only match up to the 'a' and the second subexpression,
> since it is *unqualified*, should handle the 'az', i.e. TT should
> have two parts. tt[0] should be 'cdef' and tt[1] should be 'a.'

Hi--

Why don't you try the /SUBEXPR keyword? That seems to do the trick.

IDL> print, !version
{ x86 linux unix 5.4 Sep 25 2000 32 32}
IDL> print, stregex('cdefaz',"(.*)(a|b|c)z",/subexpr, /extract)
cdefaz cdef a

Craig

--
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Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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[Message index]

		Re: bug in stregex? By: William Daffer on Fri, 19 July 2002 18:07
		Re: bug in stregex? By: Craig Markwardt on Fri, 19 July 2002 15:16
		Re: bug in stregex? By: James Kuyper on Fri, 19 July 2002 14:53

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