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Re: Problem Compiling and Using Functions [message #46804]

Wed, 04 January 2006 16:13

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

someone@someplace.com writes:

> DOH!... Doh!... doh!... (echoing off into the distance) :)
>
> Thanks for your fast response. It works now.
>
> I'm new to IDL and I'm not used there being this difference between
> functions and procedures.
>
> So, procedures don't return anything and functions *always* have to
> return something and the calling function/procedure has handle them
> correctly.

Yes, this is correct. But if you are going to write your
functions to return 0s, you have surmised correctly that
you could just as well use a procedure. All arguments
to procedures and function alike (including keyword
arguments) can be passed by reference, so getting things
into and out of procedure (as well as functions) is
reasonably trivial.

Just keep chanting to yourself "IDL is NOT C, IDL is NOT C."

Cheers,

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

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[Message index]

		Re: Problem Compiling and Using Functions By: David Fanning on Wed, 04 January 2006 16:13
		Re: Problem Compiling and Using Functions By: someone[1] on Wed, 04 January 2006 15:51
		Re: Problem Compiling and Using Functions By: Paul Van Delst[1] on Wed, 04 January 2006 14:48
		Re: Problem Compiling and Using Functions By: David Fanning on Wed, 04 January 2006 14:09
		Re: Problem Compiling and Using Functions By: R.Bauer on Sat, 07 January 2006 15:04

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