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Re: Return UNDEFINED from a function [message #50693 is a reply to message #50692]

Thu, 12 October 2006 12:54

JD Smith
Messages: 850
Registered: December 1999

Senior Member

On Thu, 12 Oct 2006 12:21:47 -0600, Jean H. wrote:

> In this case, what would be the interest in keeping a function rather
> than a procedure? ... the result of the function, if defined, is of
> prime interest... with this method one would have to run the function a
> 2nd time in order to get the result value.
>
> I guess on could do
> proName,args, result
>
> If args are defined, n_elements(results) will be > 0 (with all the
> proper checks in the procedure, so **nothing** is done if args are missing.

I admit it's not the most useful thing (it would be much more useful
if UNDEFINED were a valid variable type, which could be assigned to
other variables), but that doesn't mean there's no conceivable better
use.

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[Message index]

		Re: Return UNDEFINED from a function By: David Fanning on Thu, 12 October 2006 19:52
		Re: Return UNDEFINED from a function By: badjelly.witch on Thu, 12 October 2006 14:27
		Re: Return UNDEFINED from a function By: JD Smith on Thu, 12 October 2006 12:54
		Re: Return UNDEFINED from a function By: Jean H. on Thu, 12 October 2006 11:21
		Re: Return UNDEFINED from a function By: JD Smith on Thu, 12 October 2006 10:53
		Re: Return UNDEFINED from a function By: MarioIncandenza on Thu, 12 October 2006 01:04
		Re: Return UNDEFINED from a function By: MarioIncandenza on Wed, 11 October 2006 16:28
		Re: Return UNDEFINED from a function By: MarioIncandenza on Wed, 11 October 2006 16:09
		Re: Return UNDEFINED from a function By: David Fanning on Wed, 11 October 2006 16:04

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