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Re: variables in common blocks [message #53862 is a reply to message #53861]

Fri, 04 May 2007 09:40

Christopher Thom
Messages: 66
Registered: October 2006

Member

Quoth Lasse Clausen:

> Ok. I'll describe what I am using common blocks for: Whatever day
> during the week, I am doing one of the following:
> 1) read data
> 2) process data
> 3) plot data
> Since there are many different ways to process or plot data, it is
> nice to read the data into common blocks, so that when I decide to
> process or plot the data differently, I do not have to read it in
> again.
>
> If you have an easy solution on how to avoid common blocks, shoot. And
> why are common blocks bad? Is it the same reason "goto" statements are
> bad?

Well...I tend to store all my reduced data in IDL .sav files, then read
them whenever I want to run a routine. So which is more evil...sav files
or common blocks? *ducks* :-)

On the GOTO side of things, I often use them as a get-out-of-jail-free
statement inside several layers of nesting, when I take user input. I put
in a "quit now and I really mean it" option for myself, then jump to a
cleanup section at the end, so I don't leave a mangled plotting window and
file handles lying around.

cheers
chris

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[Message index]

		Re: variables in common blocks By: David Fanning on Fri, 04 May 2007 09:48
		Re: variables in common blocks By: Christopher Thom on Fri, 04 May 2007 09:40
		Re: variables in common blocks By: David Fanning on Fri, 04 May 2007 09:03
		Re: variables in common blocks By: lasse on Fri, 04 May 2007 08:56
		Re: variables in common blocks By: Foldy Lajos on Fri, 04 May 2007 08:36
		Re: variables in common blocks By: David Fanning on Fri, 04 May 2007 08:16
		Re: variables in common blocks By: Maarten[1] on Fri, 04 May 2007 08:07
		Re: variables in common blocks By: lasse on Fri, 04 May 2007 07:42
		Re: variables in common blocks By: David Fanning on Fri, 04 May 2007 07:11
		Re: variables in common blocks By: lasse on Fri, 04 May 2007 07:06
		Re: variables in common blocks By: David Fanning on Fri, 04 May 2007 06:45

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