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#DEFINE - Why?
Message
De
31/03/2008 16:55:54
 
 
À
31/03/2008 16:43:53
Jay Johengen
Altamahaw-Ossipee, Caroline du Nord, États-Unis
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Titre:
Versions des environnements
Visual FoxPro:
VFP 9 SP2
Divers
Thread ID:
01306848
Message ID:
01307146
Vues:
12
I work on many different applications. I have a standard .H file where several of these reused constants are defined. As with the FoxPro.H file, I include the standard in the application once. Not only does it contains character to Constant definition, but also our company info, a few other constants that are used everywhere.

I uses constants to ease the readability and lessen the time to type the code. But the chose its yours.

>Um...
>
>m.Constant_CRLF = CHR(13)+CHR(10)
>
>or
>
>oProject.Constants.Constant_CRLF = CHR(13)+CHR(10)
>
>I think that works too.
>
>>>Isn't that more of an issue of coding practices rather than using a variable vs defines? I can do the same thing you just said with variables.
>>
>>Besides, do like type CHR(13)+CHR(10) all over the place, or would it be easier to type CRLF.
>>
>>#DEFINE CRLF CHR(13)+CHR(10)
>>
>>>
>>>>Then look at this from a maintenance viewpoint. Values that appear in code are called, "magic numbers". They do something, but you don't necessarily know what they mean. It's just a number. And, it may appear in several places, which means if the value changes at some point, you have to hunt them all down. If you use a #DEFINE, you can give the number some meaningful name. And, if all the #DEFINEs are in a single file, you only have to go one place to change them.
>>>>
>>>>Run down to your local Borders bookstore and find the book "Code Complete" by Steve McConnell and read about magic numbers.
>>>>
>>>>
>>>>>Is this an issue really?
Greg Reichert
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