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Re: User selectable lower array bound? [message #26147 is a reply to message #25981]

Wed, 08 August 2001 04:47

Martin Schultz
Messages: 515
Registered: August 1997

Senior Member

Craig Markwardt <craigmnet@cow.physics.wisc.edu> writes:
> JD Smith <jdsmith@astro.cornell.edu> writes:
>> The most annoying thing about IDL arrays to me is the need always to
>> test whether they exist or not when concatenating onto them. The idea
>> of extending arrays in both directions would be neatly summed up by
>> allowing:
>>
>> a= & a= even if a doesn't (yet) exist.
>>
>> Either that, or IDL needs a list type which allows such operations.
>> Wasn't that just me ranting about special case functionality leading to
>> inconsistency?
>
> Hmmm, agreed. I think WMC's and my proposal was for a "null" data
> type which was essentially an empty list.
>
> Craig

as in
var = nularr(100) ;-)

what is N_Elements(nul_variable) ? How do you test for a keyword etc.?

Cheers,

Martin

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[Message index]

		User selectable lower array bound? By: Paul van Delst on Thu, 02 August 2001 14:47
		Re: User selectable lower array bound? By: Jeff Guerber on Fri, 03 August 2001 16:11
		Re: User selectable lower array bound? By: John-David T. Smith on Fri, 03 August 2001 15:36
		Re: User selectable lower array bound? By: Craig Markwardt on Fri, 03 August 2001 15:08
		Re: User selectable lower array bound? By: Pavel A. Romashkin on Mon, 06 August 2001 09:21
		Re: User selectable lower array bound? By: thompson on Mon, 06 August 2001 07:29
		Re: User selectable lower array bound? By: Paul van Delst on Fri, 03 August 2001 09:49
		Re: User selectable lower array bound? By: Stein Vidar Hagfors H[1] on Fri, 03 August 2001 09:25
		Re: User selectable lower array bound? By: Marcus O'Brien on Fri, 03 August 2001 03:40
		Re: User selectable lower array bound? By: John-David T. Smith on Wed, 08 August 2001 12:26
		Re: User selectable lower array bound? By: Paul van Delst on Wed, 08 August 2001 08:04
		Re: User selectable lower array bound? By: Martin Schultz on Wed, 08 August 2001 04:47
		Re: User selectable lower array bound? By: Martin Schultz on Wed, 08 August 2001 04:46
		Re: User selectable lower array bound? By: marc schellens[1] on Wed, 08 August 2001 07:29
		Re: User selectable lower array bound? By: marc schellens[1] on Tue, 07 August 2001 04:36
		Re: User selectable lower array bound? By: Craig Markwardt on Tue, 07 August 2001 10:21
		Re: User selectable lower array bound? By: John-David T. Smith on Tue, 07 August 2001 08:24
		Re: User selectable lower array bound? By: bennetsc on Mon, 06 August 2001 20:26
		Re: User selectable lower array bound? By: John-David T. Smith on Mon, 06 August 2001 13:52
		Re: User selectable lower array bound? By: Paul van Delst on Mon, 06 August 2001 09:47
		Re: User selectable lower array bound? By: Paul van Delst on Mon, 06 August 2001 09:06
		Re: User selectable lower array bound? By: Paul van Delst on Thu, 09 August 2001 07:04
		Re: User selectable lower array bound? By: david[2] on Thu, 09 August 2001 06:51
		Re: User selectable lower array bound? By: Paul van Delst on Thu, 09 August 2001 06:15

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