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Re: Discussion on global variables in IDL [message #26150 is a reply to message #26018]

Wed, 08 August 2001 03:55

Martin Schultz
Messages: 515
Registered: August 1997

Senior Member

"Pavel A. Romashkin" <pavel.romashkin@noaa.gov> writes:

> ...
> Common blocks are useful - there is little doubt about it. But I can see
> very, very few instances when they are the only way. And the entire idea
> of "global" variables seems to me to be resulting from the evolutionary
> approach to programming - start with command line data analyses, get
> tired of copy-paste. write code, expand it and still need to access the
> data the way you started it.

And this is exactly their weakness. I would guess that most IDL applications
are born out of ad-hoc code once written to analyse a specific situation,
and then generalized. To get rid of common blocks in this provess is much
harder than to avoid them in the first place.

Cheers,

Martin

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[Message index]

		Re: Discussion on global variables in IDL By: Pavel A. Romashkin on Wed, 01 August 2001 10:57
		Re: Discussion on global variables in IDL By: Martin Schultz on Wed, 01 August 2001 05:50
		Re: Discussion on global variables in IDL By: alt on Fri, 10 August 2001 02:32
		Re: Discussion on global variables in IDL By: Martin Schultz on Wed, 08 August 2001 03:55

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