comp.lang.idl-pvwave archive: archive » Re: Scope

Home » Public Forums » archive » Re: Scope_VarFetch Bug or Feature?

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Scope_VarFetch Bug or Feature? [message #47505 is a reply to message #47504]

Tue, 14 February 2006 14:33

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

=?ISO-8859-2?Q?F=D6LDY_Lajos?= writes:

> well, you can check it first:
>
> help, out=s, (Scope_VarFetch(names[j], Level=1, /Enter))
> if strpos(s, 'UNDEFINED =') gt 0 then print, 'Undefined'
>
> (you can't retrieve an undefined variable, but you can get a
> reference to it :-)
>
> And I think the ENTER keyword works, it just creates an undefined
> variable :-) You can create a defined variable by
>
> (Scope_VarFetch('something_new', Level=1, /Enter))=0

Ah, now all that screwy parentheses stuff I remember from
a couple of months ago when I first starting looking at
SCOPE_VARFETCH is starting to make some sense to me! :-)

Thanks guys.

Cheers,

David

P.S. Let's just say we were burning about $1000/hour with
a room full of Ph.D. physicists trying to figure it out from
the documentation earlier today, to no avail. :-(

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

Report message to a moderator

[Message index]

		Re: Scope_VarFetch Bug or Feature? By: David Fanning on Tue, 14 February 2006 18:00
		Re: Scope_VarFetch Bug or Feature? By: retsil on Tue, 14 February 2006 17:52
		Re: Scope_VarFetch Bug or Feature? By: Craig Markwardt on Tue, 14 February 2006 16:31
		Re: Scope_VarFetch Bug or Feature? By: David Fanning on Tue, 14 February 2006 14:51
		Re: Scope_VarFetch Bug or Feature? By: Mark Hadfield on Tue, 14 February 2006 14:46
		Re: Scope_VarFetch Bug or Feature? By: David Fanning on Tue, 14 February 2006 14:33
		Re: Scope_VarFetch Bug or Feature? By: Foldy Lajos on Tue, 14 February 2006 14:23
		Re: Scope_VarFetch Bug or Feature? By: Robert Barnett on Tue, 14 February 2006 14:22
		Re: Scope_VarFetch Bug or Feature? By: JD Smith on Thu, 16 February 2006 14:41

Previous Topic:	Re: [OT] english and spanish; was: Leer archivos ASCII
Next Topic:	XYOUTS Decimal format

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 10:24:45 PDT 2025

Total time taken to generate the page: 0.87955 seconds