I used UNIVERSAL::isa for reasons that often apply:
- Scalar::Util is fairly recent, meaning that many people don't have it.
- UNIVERSAL::isa will work just fine unless other code is being either amazingly stupid or amazingly devious. In either case, you're getting what you deserve if you wrote the code that blesses into ARRAY (etc).
Warning: Unless otherwise stated, code is untested. Do not use without understanding. Code is posted in the hopes it is useful, but without warranty. All copyrights are relinquished into the public domain unless otherwise stated. I am not an angel. I am capable of error, and err on a fairly regular basis. If I made a mistake, please let me know (such as by replying to this node).