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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 need for return statements in a Rust function such as this.
Renaming's not a bad idea; makes the code portable. Not that this needs that in particular...
Why harm readability by using bitwise operators?
An excellent point. Though for the scope of the problem it would hardly matter.