Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
This is not checking if all characters are valid hexadecimal characters. It would fail for strings containing g-z...
Wow, this really is the most elegant solution.. It should be the top one in my opinion.