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Re: splitting difficult(?) strings [message #28748 is a reply to message #28737]

Tue, 08 January 2002 14:49

Martin Downing
Messages: 136
Registered: September 1998

Senior Member

"Craig Markwardt" <craigmnet@cow.physics.wisc.edu> wrote in message
news:onr8p0k4se.fsf@cow.physics.wisc.edu...
>
> hradilv.nospam@yahoo.com writes:
>
>> Any ideas on what would be the easiest (best?) way to split strings
>> that have the following characteristics? Perhaps best understood by
>> looking at examples?
>>
>> 1)
>> buf= '4 5 6'
>> strsplit(buf,' ',/extract) yields ['4','5','6'] {good}
> ...
>> Maybe I can summarize: I would like something that will split the
>> string by spaces, PROTECTED by "s. ie there may be spaces within the
>> "s which should not cause a split.
>
> Using STRSPLIT is like sending a boy to do a man's job. I think there
> is no other choice but to hand-code what you want. [ Counter-examples
> welcomed. ] It *may* be possible to code it into a regular
> expression, but I'm not sure how to handle the "quotes-optional"
> aspect.
>

Hi Vince, this works for your examples:

---------------
FUNCTION vince_sep, s

IF strpos(s, '"') NE -1 THEN BEGIN
sa = strsplit(s, '^"|" "|"$', /EXTRACT,/REGEX, /PRESERVE_NULL)
n = n_elements(sa)
IF n GT 2 THEN sa = sa[1:n-2]
ENDIF ELSE BEGIN
sa = strsplit(s,' ', /EXTRACT)
ENDELSE
return, sa

END
-----------------

cheers

Martin
--
----------------------------------------
Martin Downing,
Clinical Research Physicist,
Grampian Orthopaedic RSA Research Centre,
Woodend Hospital, Aberdeen, AB15 6LS.

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[Message index]

		Re: splitting difficult(?) strings By: hradilv on Wed, 09 January 2002 09:46
		Re: splitting difficult(?) strings By: hradilv.nospam on Wed, 09 January 2002 07:14
		Re: splitting difficult(?) strings By: Martin Downing on Tue, 08 January 2002 14:49
		Re: splitting difficult(?) strings By: Craig Markwardt on Tue, 08 January 2002 11:42

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