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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.
yes it got errors and i can't understand why because it use the ruby prime library.
Oh sorry and thank you @paulrichard :)
he drinks 0.5l per hour but in the exemple he run 3h and drink 1l but 0.5*3 = 1.5 no ?
Thank you for helping