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Re: stregex question [message #67470 is a reply to message #67221]

Tue, 21 July 2009 10:58

wlandsman
Messages: 743
Registered: June 2000

Senior Member

Mike,

> IDL> pos = stregex(s, '([^e]e[^e])|(^e[^e])|(^e$)|([^e]e$)')
> IDL> pos += strmid(s, pos, 1) ne 'e'

Thanks for the quick reply. For my own reference when I go back to
google this answer, the above code is testing 4 possibilities

[^e]e[^e] - "e" surrounded by non-"e"
(^e[^e]) - "e" at beginning of string followed by non-"e"
(^e$) - Single character string with value "e"
([^e]e$) - - "e" at the end of the string preceded by a non-"e"

In the first and last case (testing a preceding character) one needs
to add 1 to the position found. --Wayne

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[Message index]

		Re: stregex question By: Michael Galloy on Tue, 21 July 2009 09:53
		Re: stregex question By: JDS on Tue, 21 July 2009 17:19
		Re: stregex question By: wlandsman on Tue, 21 July 2009 10:58

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