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Re: compile a routine wich inlude a commun [message #47108 is a reply to message #47067]

Tue, 24 January 2006 14:15

JD Smith
Messages: 850
Registered: December 1999

Senior Member

On Tue, 24 Jan 2006 22:30:22 +0100, Fï¿½LDY Lajos wrote:

> Hi,
>
> and the odd thing is, that functions sometimes return these references,
> not the values:
>
> function f, arg
> return, arg
> end
>
> a=1
> (f(a))=2
> help, a
>
> A INT = 2
>

Interesting. Try:

IDL> (f(a[0]))=2
% Expression must be named variable in this context: <INT ( 2)>.
% Execution halted at: $MAIN$

and you'll see the distinction. Temporary variables can be used for
many things, but direct assignment is not possible. One good use of
temporary variables is subscripting or structure dereferencing them:

IDL> a=(size(b,/DIMENSIONS)[0]

JD

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[Message index]

		compile a routine wich inlude a commun By: L. Testut on Sun, 22 January 2006 04:26
		Re: compile a routine wich inlude a commun By: JD Smith on Tue, 24 January 2006 14:15
		Re: compile a routine wich inlude a commun By: Foldy Lajos on Tue, 24 January 2006 13:30
		Re: compile a routine wich inlude a commun By: JD Smith on Tue, 24 January 2006 13:13
		Re: compile a routine wich inlude a commun By: JD Smith on Tue, 24 January 2006 13:05
		Re: compile a routine wich inlude a commun By: JD Smith on Tue, 24 January 2006 12:55
		Re: compile a routine wich inlude a commun By: Paul Van Delst[1] on Tue, 24 January 2006 08:58
		Re: compile a routine wich inlude a commun By: David Fanning on Tue, 24 January 2006 08:26
		Re: compile a routine wich inlude a commun By: Paul Van Delst[1] on Tue, 24 January 2006 08:13
		Re: compile a routine wich inlude a commun By: Paul Van Delst[1] on Tue, 24 January 2006 08:09
		Re: compile a routine wich inlude a commun By: peter.albert@gmx.de on Tue, 24 January 2006 08:01
		Re: compile a routine wich inlude a commun By: Paul Van Delst[1] on Tue, 24 January 2006 06:42
		Re: compile a routine wich inlude a commun By: Maarten[1] on Tue, 24 January 2006 02:04
		Re: compile a routine wich inlude a commun By: peter.albert@gmx.de on Tue, 24 January 2006 00:09
		Re: compile a routine wich inlude a commun By: David Fanning on Mon, 23 January 2006 20:03
		Re: compile a routine wich inlude a commun By: Paul Van Delst[1] on Mon, 23 January 2006 16:14
		Re: compile a routine wich inlude a commun By: David Fanning on Mon, 23 January 2006 15:16
		Re: compile a routine wich inlude a commun By: David Fanning on Mon, 23 January 2006 10:38
		Re: compile a routine wich inlude a commun By: Paul Van Delst[1] on Mon, 23 January 2006 10:25
		Re: compile a routine wich inlude a commun By: David Fanning on Mon, 23 January 2006 10:04

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