| Re: Most Common IDL Programming Errors [message #59760 is a reply to message #59759] |
Tue, 08 April 2008 17:27   |
Vince Hradil
Messages: 574
Registered: December 1999
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Senior Member |
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On Apr 8, 7:13 pm, David Fanning <n...@dfanning.com> wrote:
> Folks,
>
> I realize you don't much like to play games (I'm thinking
> back to the "Yo mama's so ..." thread), but you have no
> idea how hard it is to come up with new topics for my IDL
> Tips page every week. (Especially so because I try to
> understand what I write and make available, which
> pretty much rules out 4/5 of what I read on this newsgroup.)
>
> Anyway, I was sitting here wondering why we don't have any
> beer in the house again, and it occurred to me that I should
> have a page listing the 10 or 15 most common IDL programming
> errors with their solutions. But I can only think of three.
>
> Here are the three errors I most commonly see in IDL programs.
>
> 1. IDL programs are named incorrectly. The last program
> module in the file should have the same name as the file.
> Utility modules in the file should start with the name
> of the "command" (or last) module to make clear their
> purpose.
>
> 2. KEYWORD_SET is used to check whether a keyword is
> "used" or "defined". This function should only be
> used with binary keywords. (I plan to avoid all
> nuance with this list, and just go with black and
> white pronouncements.)
>
> 3. People draw graphics willy-nilly in widget programs
> without having the faintest idea which window their
> graphics might show up in.
>
> What would be on your list? Of course, typos are assumed. :-)
>
> 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.")
How about:
-indexing for-loops with (short) integers.
-using indeces from where without checking count > 0
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