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Re: Common block conumdrum [message #8445 is a reply to message #8355]

Tue, 04 March 1997 00:00

Phil Williams
Messages: 78
Registered: April 1996

Member

Daniel Williams wrote:
>
> When developing programs in IDL, I often work with common blocks.
> However, if I try to change the definition of an existing common
> block, I get an error because it IDL thinks that I am trying to use a
> pre-existing common block in a naughty manner. According to the
> user's manual (v3.6 p6-10) this is what IDL should do.
> However, when creating new programs, I often want to change the
> definition of the common block as the program developes. How can I do
> this, short of exiting IDL and starting over? Is there some "delvar"
> equivalent for deleting common blocks or programs from memory?
>

There's no way to do this. I have a couple of suggestions though:

1) Get rid of the common blocks. I used to use them alot as well, but
found that my programming became a lot cleaner when I started grouping
like things in structures and passed them into procedures.

2) Have a common block that contains an anonymous structure. This was
the first thing I did on my way to #1. Make sure that the structure is
anonymous or you'll run into the same problem as you did with common
blocks.

Good luck,
Phil
--
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Phil Williams, Ph.D.
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[Message index]

		Common block conumdrum By: williams on Mon, 03 March 1997 00:00
		Re: Common block conumdrum By: Phil Williams on Wed, 05 March 1997 00:00
		Re: Common block conumdrum By: J.D. Smith on Wed, 05 March 1997 00:00
		Re: Common block conumdrum By: Struan Gray on Wed, 05 March 1997 00:00
		Re: Common block conumdrum By: wonko on Tue, 04 March 1997 00:00
		Re: Common block conumdrum By: David Foster on Tue, 04 March 1997 00:00
		Re: Common block conumdrum By: Phil Williams on Tue, 04 March 1997 00:00
		Re: Common block conumdrum By: brian.jackel on Tue, 04 March 1997 00:00
		Re: Common block conumdrum By: david.eldon on Fri, 16 May 2014 14:07

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