Loading collection data...
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.
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Wow, multiline passwords? Give me two! :D
Tests with a single element (and maybe with 2) should be present in all languages.
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What is true for [1]? 0 or -1?
Wow, recursion (not even tail) is "best practice" vs iteration? What is the world rolling to?