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Re: Bug in N_PARAMS? [message #64142 is a reply to message #63974]

Wed, 03 December 2008 09:06

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

David Fanning writes:

> Carsten Lechte writes:
>
>> Kenneth P. Bowman wrote:
>>> to provide default values for optional parameters.
>>
>> I wrote this little procedure for setting default values
>> that I use a zillion times a day:
>>
>>
>> PRO defaultarg, arg, defval, VALUEGIVEN=valuegiven
>>
>> IF N_ELEMENTS( arg) EQ 0 THEN BEGIN
>> arg = defval
>> valuegiven = 0
>> ENDIF ELSE valuegiven = 1
>>
>> END
>
> This is a pretty good idea. I can see how it would
> save some typing! :-)
>
> Here is a slightly modified version. I'll add this,
> with documentation, to the Coyote Library later today.

I have a doppelganger at work who takes all my good ideas
as soon as I publish them and points out all their deficiencies
and the obvious ways in which I could have made them better. :-(

To that end, I've updated the SetDefaultValue program I published
earlier to something a good deal simpler that also works in a more
intuitive way. You can find the update, if you are interested in
this sort of thing, here:

http://www.dfanning.com/programs/setdefaultvalue.pro

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: Bug in N_PARAMS? By: David Fanning on Wed, 26 November 2008 07:49
		Re: Bug in N_PARAMS? By: Carsten Lechte on Tue, 25 November 2008 23:53
		Re: Bug in N_PARAMS? By: Kenneth P. Bowman on Tue, 25 November 2008 06:29
		Re: Bug in N_PARAMS? By: David Fanning on Mon, 24 November 2008 14:20
		Re: Bug in N_PARAMS? By: Mark[1] on Thu, 27 November 2008 13:53
		Re: Bug in N_PARAMS? By: Brian Larsen on Tue, 02 December 2008 07:03
		Re: Bug in N_PARAMS? By: David Fanning on Wed, 03 December 2008 09:06

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