Strictly speaking (and one should always speak strictly, especially to animals and small children) anything posted here is copyrighted by the poster unless copyright has been transferred. That's true in most jurisdictions, any way. Equally strictly speaking you should request permission from the copyright owner before reusing his/her/its material. The owner may then give permission (or not) under any license they wish.

In the real world, you can pretty much use anything you wish that's posted on PerlMonks without getting into trouble. It is common courtesy, though, to contact the author if you're proposing to reuse anything non-trivial.

Legalese: anyone can use this post for any purpose they wish, in the rather unlikely event that any would actually want to!

Paul