comp.lang.idl-pvwave archive: archive » Dumb problem with STRPOS

Home » Public Forums » archive » Dumb problem with STRPOS

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Dumb problem with STRPOS [message #4738]

Fri, 14 July 1995 00:00

steele
Messages: 5
Registered: March 1994

Junior Member

Can someone explain the following behaviour to me?

IDL> help,/st,!version ; Here's the situation.
** Structure !VERSION, 3 tags, length=24:
ARCH STRING 'mipseb'
OS STRING 'RISC/os'
RELEASE STRING '3.1.0'
IDL> test='c000.' ; define a string
IDL> help,test ; check it is a string
TEST STRING = 'c000.'
IDL> print,strpos(test,'000') ; search for a substring
1
IDL> print,strpos(test,'000.') ; and a slightly different one
1
IDL> test='c0000.' ; add a '0'
IDL> help,test
TEST STRING = 'c0000.'
IDL> print,strpos(test,'000') ; search again
1
IDL> print,strpos(test,'000.') ; Why isn't this substring found???
-1

I checked the manual for this version and it says nothing that would
explain this. BTW, it's nothing to do with octal constants.

All suggestions gratefully received!

Dave

--
David Steele | Internet : steele@aragorn.phys.ucalgary.ca
Dept. of Physics and Astronomy | SPAN : CANCAL::STEELE
The University of Calgary | Phone : +1 403 220 8651
OPINIONS EXPRESSED WITHIN ARE MY OWN AND NOT THOSE OF THE UNIVERSITY OF CALGARY

Report message to a moderator

[Message index]

		Dumb problem with STRPOS By: steele on Fri, 14 July 1995 00:00
		Re: Dumb problem with STRPOS By: steele on Fri, 14 July 1995 00:00

Previous Topic:	idl programs for image segmentation & volumetric brain MRI
Next Topic:	Are handles garbage collected?

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Nov 28 12:54:47 PST 2025

Total time taken to generate the page: 1.76148 seconds