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Re: On Pointers and Culture [message #42976]

Fri, 04 March 2005 12:28

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

JD Smith writes:

> Not only are pointer variables "more like IDL variables", they *are*
> IDL variables.

Alright! Another tutorial!!

But I do take issue with this:

> IDL> *p=findgen(10,10)
> IDL> help,/heap
> Heap Variables:
> # Pointer: 1
> # Object : 0
>
> <PtrHeapVar2> FLOAT = Array[10, 10]
>
> I just changed the contents of that heap variable. And no, this
> is no more dangerous than doing this:
>
> IDL> a=1
> IDL> a=findgen(10,10)

I think "no more dangerous" is like saying a handgun
is no more dangerous than a rifle. It don't matter much
if it's aimed at you! I will agree that a marksman who
has taken his Hunter Safety class to heart is probably
no immediate threat. :-)

Cheers,

David

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

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[Message index]

		Re: On Pointers and Culture By: David Fanning on Fri, 04 March 2005 12:28
		Re: On Pointers and Culture By: JD Smith on Fri, 04 March 2005 12:01
		Re: On Pointers and Culture By: David Fanning on Fri, 04 March 2005 08:06
		Re: On Pointers and Culture By: David Fanning on Fri, 04 March 2005 08:04
		Re: On Pointers and Culture By: Benjamin Hornberger on Fri, 04 March 2005 07:47
		Re: On Pointers and Culture By: Benjamin Hornberger on Fri, 04 March 2005 07:46
		Re: On Pointers and Culture By: David Fanning on Fri, 04 March 2005 06:05
		Re: On Pointers and Culture By: Antonio Santiago on Fri, 04 March 2005 05:13
		Re: On Pointers and Culture By: David Lopez Pons on Fri, 04 March 2005 03:25
		Re: On Pointers and Culture By: Antonio Santiago on Fri, 04 March 2005 00:16

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