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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.
That's a very cool answer, I have never used Math.sign before.
This comment is hidden because it contains spoiler information about the solution
Using destructuring is cool :)
Your solution using recursion is very cool
I had never used match, it's good to know.
This is similar to mine :)