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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.
JS version has no random tests.
The formula for ISBN-10 as written by the description isn't even correct, since it starts at
0.And where is
X?Xis a possible check digit too, so it should be tested (though then you'll have to figure out how to make the "remove junk character" part work).Okay, so you know that ISBN-10 is already done, but ISBN-13 is barely any different from Luhn algorithm with
*2replaced by*3(and CW has Luhn too), and the "remove junk character" part is barely a notable addition to the kata.So what is the actual part of the kata that can be considered novel? It looks just like a combination of duplicates.