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.
I'm trying it in Ruby.
EDIT
Nevermind, that third test case you posted actually helped me find the final bug in mine. Thanks!
This is probably my favorite.
Are you sure there isn't a typo in one of the credit card numbers (the 3rd test when you submit)?
I grabbed 500 card numbers from that website and tested locally against my implementation and it works fine.