Re: Order of function load matters ??

Hello All,
 probably 'load' of NCL defines all the functions in memory including their
dependencies and therefore the functions being used have to be predefined. One
way out could be just to list the functions, which are defined within the
files, on to the memory while 'load'-ing (say, after syntax checking, note the
file name and line number where the function starts). A function can be loaded
to the memory only when it is called. This way the dependency to a function
which is being 'load'-ed later can be avoided. A possible drawback of this
could be decrease of performance since NCL needs to do more work during
execution of the job.

regards,

arindam

--
---------- Original Message -----------
From: "Saji N. Hameed" <saji_at_apcc21.net>
To: Dennis Shea <shea_at_ucar.edu>
Cc: ncl-talk_at_ucar.edu
Sent: Sat, 27 Jun 2009 22:57:47 +0900
Subject: Re: Order of function load matters ??
> Hi Dennis,
> 
> > Unlike a language like (say) fortran which has a compile/link/load
> > sequence where the linker sets up pointers to any callable
> > functions, NCL does not.
> 
> > I think languages like python work th same way.
> 
> Maybe not, this order dependency is not there in Ruby and I guess 
> not in Python as well. Within a script I could load two libraries 
> lib_a and lib_b in any order, even when lib_b is dependent on lib_a
> 
> saji
> 
> > 
> > 
> > 
> > http://www.ncl.ucar.edu/Document/Manuals/Ref_Manual/NclStatements.shtml
> > 
> > Jack Glendening wrote:
> > > Using NCL 5.0.0, I have sets of functions in two files which I load
> > > immediately one after the other ala
> > > 
> > >  load "FunctionsFile_A"
> > >  load "FunctionsFile_B"
> > >  NCL COMMANDS WHICH CALL FUNCTIONS IN THE ABOVE FILES
> > > 
> > > I just altered one of the functions in "FucntionsFile_A" to utilize a
> > > new function "nintspan".  When I placed the new function at the top of
> > > "FunctionsFile_A" it worked.  But if I moved the new function to
> > > "FunctionsFile_B" I got the message "fatal:Undefined identifier:
> > > (nintspan) is undefined".  So apparently the the ordering of the
> > > function definitions matters ?!  This does not make sense to me, since
> > > one cannot always know the ordering of the function calls.
> > > 
> > >             Jack Glendening
> > > 
> > > _______________________________________________
> > > ncl-talk mailing list
> > > List instructions, subscriber options, unsubscribe:
> > > http://mailman.ucar.edu/mailman/listinfo/ncl-talk
> > _______________________________________________
> > ncl-talk mailing list
> > List instructions, subscriber options, unsubscribe:
> > http://mailman.ucar.edu/mailman/listinfo/ncl-talk
> >
> 
> -- 
> Saji N. Hameed
> 
> APEC Climate Center          				
> 1463 U-dong, Haeundae-gu,                               +82 51 745 3951
> BUSAN 612-020, KOREA                    		saji_at_apcc21.net
> Fax: +82-51-745-3999
> 
> _______________________________________________
> ncl-talk mailing list
> List instructions, subscriber options, unsubscribe:
> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
> 
> -- 
> This message has been scanned for viruses and
> dangerous content by MailScanner, and is
> believed to be clean.
------- End of Original Message -------
-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
_______________________________________________
ncl-talk mailing list
List instructions, subscriber options, unsubscribe:
http://mailman.ucar.edu/mailman/listinfo/ncl-talk