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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.
not satisfied with my dull solution...wonder if there is a google smartass way
IMHO Java8 solutions should not include stream and maps - you are being asked an algorithmic and arrays/based question, answering by creating tons of objects is not appropriate.