I agree with the first part of your argument, you can learn
some excellent stuff by looking at what has already been
done in other modules.
in reply to RE: Modules
in thread Stock Quotes
However for anything other than learning, and your own pet
projects, I would certainly recommend using non-standard
modules (non-standard meaning modules not distributed with perl). I am not saying this because you might reinvent
the wheel, but there is a huge part of good programming
that people here seem to never think about: maintenance!
If you copy and paste code from a module into your own
code then you are stuck maintaining that code forever.
only do you have to maintain the code specific to your
project, but also the code that is general in purpose.
Say there were actual bugs in the code you
copied over, then instead of fixing the bug your self, you
just use the CPAN module and grab the latest release (letting
someone else fix the bugs for you).
But of course
there are some problems using the module approach, if the author
decides to change the API from one version to the next then
you have to modify your code to use the new version.
But that is why I would not recommend for production code
using modules with lower version numbers or ones that in
the documentation say they are 'alpha' or 'beta' modules.
Other than that, include what ever you think might be handy.
Of course I recognize there are exceptions to every
rule, like critical speed performance. But for most large
applications, I just wanted to mention that I think
maintenance should be a significant consideration. We may
leave a project, but our code lives on forever!
Something to think
Update: Anyone what to bother telling me why this node is a negative reputation? If you have a counter argument let me hear it, otherwise I still think the advise is pretty sound.