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Re: Passing optional parameters through a wrapper routine [message #18890 is a reply to message #18840]

Fri, 11 February 2000 00:00

davidf
Messages: 2866
Registered: September 1996

Senior Member

J.D. Smith (jdsmith@astro.cornell.edu) writes:

> Another side-benefit of arg_present() is that you can use it to annoy David
> Fanning by forcing him to contradict bold statements such as "it is NOT possible
> to reliably determine if a keyword was used in a call to your program", when in
> fact the test:
>
> n_elements(k) ne 0 OR arg_present(k)
>
> will tell you precisely this ;).

Actually, I've toned the rhetoric down in my IDL
courses, even if I haven't gotten around to updating
my web pages.

I now say "It's NOT possible to reliably determine if
a keyword was used in a call, without resorting to a
bunch of nonsense I can never remember and you
shouldn't have to worry about anyway if you do it
the way I'm telling you." :-)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Passing optional parameters through a wrapper routine By: bowman on Tue, 08 February 2000 00:00
		Re: Passing optional parameters through a wrapper routine By: thompson on Mon, 14 February 2000 00:00
		Re: Passing optional parameters through a wrapper routine By: John-David T. Smith on Fri, 11 February 2000 00:00
		Re: Passing optional parameters through a wrapper routine By: davidf on Fri, 11 February 2000 00:00
		Re: Passing optional parameters through a wrapper routine By: John-David T. Smith on Fri, 11 February 2000 00:00
		Re: Passing optional parameters through a wrapper routine By: Martin Schultz on Fri, 11 February 2000 00:00
		Re: Passing optional parameters through a wrapper routine By: thompson on Thu, 10 February 2000 00:00
		Re: Passing optional parameters through a wrapper routine By: edward.s.meinel on Thu, 10 February 2000 00:00
		Re: Passing optional parameters through a wrapper routine By: Mark Hadfield on Thu, 10 February 2000 00:00
		Re: Passing optional parameters through a wrapper routine By: davidf on Wed, 09 February 2000 00:00
		Re: Passing optional parameters through a wrapper routine By: Craig Markwardt on Wed, 09 February 2000 00:00
		Re: Passing optional parameters through a wrapper routine By: davidf on Wed, 09 February 2000 00:00

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