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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.
Agree this function is incorrect, and it's unfortunate that it was upvoted so many times.
Temporary arrays - against the rules
This is not how distances work. Description would make more sense if it was something fixed - either roundtrip distances on each day or if there's a budget and amounts are prices.