Aidan Whitehall wrote:
>
> > In essence, refering to variables outside the scope of a tag
> > is analogous to using global variables in other languages, something
> > that was frowned upon in the books I read and the courses I took.
> > The proper way, then, would be to explicitly pass all necessary
> > parameters to a tag, and eliminate the uncertainty.
>
> ....and double your workload.
>
> Well, OK... maybe that's a slight exaggeration ;-)
Well, theoretically, if you rely on global variables, your
tags have limited re-use, because that global variable needs
to be defined before you call it.
If you do all your work in-house development shop, you are in
essence building a 'library' of code that can be re-used for
other projects for your company.
If you are a consultant, then you probably do not own the code
you are writing. You cannot jump from 'project to project' and take
your code with you. However, as a consultant, aren't they paying you
to 'do it right'? Presumably someone down the line can re-use your
code even if it isn't you.
The one remaining thing I have to say on the subject is to make
sure you do not use global (application) variables as a replacement
for local (instance) variables.
Back in them there school days, a teacher once told us that once
we get out into the real world we'll find that most people will code
using global variables because they don't understand how to use local
variables. (That has not been the case in most instances, thank god)
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