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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.
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In javascript, I wrote various possible optimization solutions.
Errors where they should not be ... Every start programm in kata produces a different number of errors 10-30 (I checked the errors separately, the code produced the desired result)
What is the paradox?