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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.
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object does represent a number.I reworked the error messages and now they provide given input, expected output and actual output.
Thank you for your feedback.
I'll look over the testcases and improve them. I don't know if I'll find time for it today, but as soon as they are ready I will let you know it.
There's no one right answer to this one. I do think that that particular solution is less clever than, say, mine, but there's nothing incorrect about it...