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Re: Optional parameters [message #38198 is a reply to message #38196]

Tue, 24 February 2004 08:31

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

JD Smith writes:

> I would have put it more simply: all parameters, keyword or
> positional, are optional in IDL. How you choose to treat missing
> parameters defines the behavior of a routine. See David's linked
> article for more. I think there are enough useful example (even among
> RSI's own offerings) which violate this general rule of thumb that it
> shouldn't be considered a rule.

I wasn't really going to admit this, but I have even
violated the "no required keywords" rule on occasion.
(Although not in anything I am offering to the public.)
The temptation is really too great when you are about
10 levels up in a superclass and you *really* need something
like keyword inheritance to work! :-)

Cheers,

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

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[Message index]

		Re: Optional parameters By: Pavel Romashkin on Wed, 25 February 2004 10:21
		Re: Optional parameters By: David Fanning on Wed, 25 February 2004 09:26
		Re: Optional parameters By: Craig Markwardt on Wed, 25 February 2004 08:48
		Re: Optional parameters By: David Fanning on Wed, 25 February 2004 07:08
		Re: Optional parameters By: Paul Van Delst[1] on Wed, 25 February 2004 06:49
		Re: Optional parameters By: Craig Markwardt on Tue, 24 February 2004 21:50
		Re: Optional parameters By: JD Smith on Tue, 24 February 2004 14:03
		Re: Optional parameters By: R.G. Stockwell on Tue, 24 February 2004 14:02
		Re: Optional parameters By: Pavel Romashkin on Tue, 24 February 2004 13:45
		Re: Optional parameters By: JD Smith on Tue, 24 February 2004 12:13
		Re: Optional parameters By: Pavel Romashkin on Tue, 24 February 2004 09:59
		Re: Optional parameters By: David Fanning on Tue, 24 February 2004 09:08
		Re: Optional parameters By: David Fanning on Tue, 24 February 2004 08:31
		Re: Optional parameters By: JD Smith on Tue, 24 February 2004 08:10
		Re: Optional parameters By: David Fanning on Mon, 23 February 2004 17:39
		Re: Optional parameters By: David Fanning on Mon, 23 February 2004 17:05

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