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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.
It would make more sense to use an assoc list for the towns argument just like it is for the distances arg. Also maybe drop arrays altogether and use lists
how?
The translation to ocaml is really not very good...