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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.
staticfactor is not a best practice.Multiline lambdas with curly braces and functions that aren't pure (i.e. functions that cause side-effects) are not considered a good practice.