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Re: Variable undefined after while-cycle? [message #26681 is a reply to message #26680]

Wed, 19 September 2001 08:46

R.Bauer
Messages: 1424
Registered: November 1998

Senior Member

Olaf Stetzer wrote:
>
> Hello,
>
> I have a strange problem which may be related to the
> way IDL frees varaibles in/after subroutines. In the
> following example I want to compare a value with the
> one from the last while-cycle, however the Variable
> to store the Value for the next cycle (Lasttime)
> seems to be empty even at the end of the cycle
> (at point ;;;XX). When I define the Variable Lasttime
> before the while not EOF.... then the behaviour is
> still the same, the comparison (Lasttime ne mstime)
> is always true, even if it should not!
>
> Thanks,
>
> Olaf
>
> ----------------
> while not EOF(lun) do begin
> readf, lun, line
> line=strjoin(strsplit(line,'"',/extract),/single)
> Lasttime=double(values(1))
> values=strsplit(line,',',/extract)
> msdate=double(values(0))
> mstime=double(values(1))
> if (Lasttime ne mstime) then begin
> print,'', Lasttime, mstime, ' Zeiten sind ungleich!'
> Zeitpunkt=mstime2sqlts(msdate,mstime)
> insertstr='INSERT INTO ' + table + ' VALUES ("' +
> sqlts2datetimestr(Zeitpunkt) + '"'
> for i=2,(n_elements(fields)-1) do insertstr=insertstr + ', ' +
> values(i)
> insertstr=insertstr+ ' ) ;'
> ;;;XX
> ;dbobj->ExecuteSQL,insertstr
> endif else begin
> print,'', Lasttime, mstime, ' Zeiten sind gleich!'
> endelse
> endwhile
>

Dear Olaf,

you should use () only for functions
[] should be used for arrays.

I aggree to Pavels solution.

regards

Reimar

--
Reimar Bauer

Institut fuer Stratosphaerische Chemie (ICG-1)
Forschungszentrum Juelich
email: R.Bauer@fz-juelich.de
http://www.fz-juelich.de/icg/icg1/
============================================================ ======
a IDL library at ForschungsZentrum Juelich
http://www.fz-juelich.de/icg/icg1/idl_icglib/idl_lib_intro.h tml

http://www.fz-juelich.de/zb/text/publikation/juel3786.html
============================================================ ======

read something about linux / windows
http://www.suse.de/de/news/hotnews/MS.html

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[Message index]

		Re: Variable undefined after while-cycle? By: R.Bauer on Thu, 20 September 2001 00:19
		Re: Variable undefined after while-cycle? By: Craig Markwardt on Wed, 19 September 2001 18:11
		Re: Variable undefined after while-cycle? By: Martin Downing on Wed, 19 September 2001 09:28
		Re: Variable undefined after while-cycle? By: David Fanning on Wed, 19 September 2001 09:16
		Re: Variable undefined after while-cycle? By: R.Bauer on Wed, 19 September 2001 08:46
		Re: Variable undefined after while-cycle? By: Pavel A. Romashkin on Wed, 19 September 2001 08:01

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