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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.
Hi,
It wasn't sarcastic at all as I was more interested in "how to do at with Streams at all" than "should it be done with streams?".
Basically I struggled with "how to apply Java 8" in this case, so that is why I liked your solution.
Very elegant use of Java 8.