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Re: name a variable with number [message #87456 is a reply to message #87454]

Tue, 04 February 2014 06:09

Fabzi
Messages: 305
Registered: July 2010

Senior Member

Hi,

On 04.02.2014 14:57, David Fanning wrote:
> I think in the hands of someone who knows what they are doing this can
> be a powerful programming technique. I rarely see it used in those kind
> of hands.:-)

what David means is that most experienced programmers probably never
even *needed* to create a variable dynamically.

If the technique is available, this does not mean this technique is
suitable for your problem. If you think you need X variables named
var_0, var_1, ---, var_X than the algorithm you are thinking of is
probably not the best one.

In this case, a list (for IDL8+) or a pointer array (all versions) is
probably a better solution.

For example:

var = PTRARR(25)
for j=0, 24 do var[j]=PTR_NEW(whatever_you_want_to_put_inside)

Fab

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[Message index]

		name a variable with number By: gunvicsin11 on Tue, 04 February 2014 02:35
		Re: name a variable with number By: Mats Löfdahl on Tue, 04 February 2014 03:59
		Re: name a variable with number By: David Fanning on Tue, 04 February 2014 04:16
		Re: name a variable with number By: David Fanning on Tue, 04 February 2014 05:31
		Re: name a variable with number By: rjp23 on Tue, 04 February 2014 05:50
		Re: name a variable with number By: David Fanning on Tue, 04 February 2014 05:57
		Re: name a variable with number By: Fabzi on Tue, 04 February 2014 06:09
		Re: name a variable with number By: David Fanning on Tue, 04 February 2014 06:29
		Re: name a variable with number By: rjp23 on Tue, 04 February 2014 09:28
		Re: name a variable with number By: Fabzi on Tue, 04 February 2014 10:00
		Re: name a variable with number By: David Fanning on Tue, 04 February 2014 10:07
		Re: name a variable with number By: rjp23 on Tue, 04 February 2014 11:45
		Re: name a variable with number By: David Fanning on Tue, 04 February 2014 11:51
		Re: name a variable with number By: Mats Löfdahl on Tue, 04 February 2014 06:41

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