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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.
fixed some time ago
This. I was actually looking for the time performance of other solutions compared to mine, but the only solution I had found was actually implementing all of them and time them myself.
I would definitely like a feature that shows the processing time of the code (or cycles),
I would love to improve my coding skills with focus on such "best practice".
Agreed. On all test cases for Java "expected" and "but was" should be reversed.