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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.
NIcely done.
Very elegant and efficient. More should recognize this.
It still loops... the pure mathematical solutions don't loop at all. It seems they would be faster for very large numbers.
Just curious, why did they make the fancy f count as 2?
Change "Your job is to return the middle character of the word" to "Your job is to return the middle character(s) of the word" :)