Can a constant be global?
rjb at robelko.com
Mon Mar 27 07:37:14 EST 2006
>>Replicating constant behavior at global level has been discussed
>>quite a lot in the past, and not only on this list, but... it is a
>>lot more complicated than it seems at first glance. So, for now at
>>least, there is no way to make a global behave like a constant
>>through declaration. It is up to you to designate some globals as
>>global constants, like using a different prefix than for global
>But the problem there is where do you actually set them? Obviously
>you have to make sure they are set before another stack/card/control
>That's why I decided that a Constant Library was a better way to go.
>All the Best
Well, yes, that is exactly one of the problems. Another, for example,
what happens if you make a mistake in assigning a value and need to
So, yes, your Constant Library using functions is one of the
reasonable solutions. Making your own classes of globals is another.
One can also have a global array to hold your constants, like
myConstants["pi"]. Initializing these in your own project is best
done in openstack or preopenstack of the mainstack. However, in your
big reusable system, that would not work, so for you the Constant
Library is probably an optimal solution.
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