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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.
Totally agree with your comment.
Const is better in current situation.
Why let instead of const?
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This comment is hidden because it contains spoiler information about the solution