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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.
Yes, unfortunately. You have to modify the array in-place and to return the array that you get as a paramater until it gets fixed.
The code after your
ifblock will always execute - I think you meant to have anelsethere.