| Re: splitting difficult(?) strings [message #28737 is a reply to message #28730] |
Wed, 09 January 2002 07:14   |
hradilv.nospam
Messages: 19
Registered: November 2001
|
Junior Member |
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/PRESERVE_NULL ??? WOW!!! Thanks. Maybe I should read the online help
a little closer next time 8^)
On Tue, 8 Jan 2002 22:49:24 -0000, "Martin Downing"
<martin.downing@ntlworld.com> wrote:
> "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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