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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.
This makes unnecessary the evenOrdOdd function
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Because in an application use, an extention can be used globally without any issues or headaches. Simply call the exention function on any Int and you're done.
Why is this considered a best practice?
Dave is an awesome coder! Bright future ahead :)