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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.
Thank you. I just reread it and I did miss that I needed to return a linked list instead of an array.
I'm running this Kata under Node 8.1.3, and every time I return anything it tells me that I've returned [undefined], even when I return a test string. I've even manually returned [1,2,3] and it tells me that I've returned []. So I don't know what I'm doing wrong. I feel that my logic is well done and should work, but something seems to be wrong with the enviroment?