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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.
Agreed. It says in the puzzle descriptions: "All code is ran through BabelJS (ES 2015 supported)".
repeat
is part of ES 2105, isn't it?I had the same problem. .repeat is a generic method.
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