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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.
No the _ does not convey that meaning, however I often times name my private functions suchly.
You should indeed use
defpI also like the solution (keep forgetting about String.to_integer) however I still fail to see
how it passed all tests given that it does nothing concerning the tie breakers \o/