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Re: cw_field: checking entries [message #38603 is a reply to message #38568]

Fri, 12 March 2004 02:40

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Ralf Schaa writes:

> you know the feeling of wanna kick your computer...?
> (hmm ,it's not the computer fault, is it?)
>
> so i like to check the validity of the entries in a cw_field,
> when it is not defined , send a message, when it is defined go on.
> actually simple as that, but the thing is, it seems to me the value is
> always defined, no matter if there is someting in the field or not.
> i am sure some of you have fixed this problem 100 years ago, so what
> do you suggest?

I remember this being a LOT harder than it looks. :-)

You can see how I did it in FSC_FIELD. The example
code at the end of the file (do a .compile of the
file to see it) gives an example of how to test for
an undefined value, etc.

http://www.dfanning.com/programs/fsc_field.pro

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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		Re: cw_field: checking entries By: schaa on Sat, 13 March 2004 00:55
		Re: cw_field: checking entries By: David Fanning on Fri, 12 March 2004 02:40

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