Loading collection data...
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.
how does this solution handle the (n-1)th value compared with 0th value?
I still think it is a kata issue, the original list should not be mutated should be a requirement then :/
Smart!