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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 for your suggestions.
I absolutely missed that I can ignore the x in the last pattern.
I will check how the order of the pattern matching influences performance in bigger functions or even applications. Thank you for the hint, I never thought of it so far.