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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 kata is broken. The last test should produce google, not gmail...
Boo! indeed, way too little tests
What if the age array is empty? If you use hard indices you will get [nil,nil] as a result, where an empty array would be preferable. I suggest adding a case for this :)
It should prevent a division by 0 error if the array is empty!