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Re: null array [message #36562 is a reply to message #36478]

Fri, 26 September 2003 02:24

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

JD Smith writes:

> But this is also slow, since you reallocate the array on each iteration
> (which starts to hurt when the array gets large). Far better is to
> pre-allocate the array to roughly the correct size, and grow it as
> necessary. Search this newsgroup for "Is there a standard 'null' array"
> for a thread on this very topic.

Oh, oh. I've started to write this up twice now.
Good thing I'm consistent in my naming convention
or I would be doing every project two or three times.
Does this remind you of anything? :-(

Anyway, you can find a discussion about "null arrays"
here, taken from J.D.'s excellent post on the topic.

http://www.dfanning.com/code_tips/nullarray.html

Cheers,

David

--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@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]

		Re: null array By: David Fanning on Wed, 24 September 2003 18:35
		Re: null array By: tomson on Wed, 24 September 2003 17:47
		Re: null array By: JD Smith on Wed, 24 September 2003 09:17
		Re: null array By: R.Bauer on Wed, 24 September 2003 08:11
		Re: null array By: Paul Van Delst[1] on Wed, 24 September 2003 06:52
		Re: null array By: Ben Panter on Wed, 24 September 2003 02:08
		Re: null array By: Ben Panter on Wed, 24 September 2003 01:33
		Re: null array By: R.Bauer on Tue, 23 September 2003 20:21
		Re: null array By: David Fanning on Tue, 23 September 2003 20:04
		Re: null array By: David Fanning on Fri, 26 September 2003 02:24
		Re: null array By: Stein Vidar Hagfors H[2] on Tue, 30 September 2003 12:36

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