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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.
why did i take the long way?
CodeWars should allow extra points for aesthetically pleasing solutions.
You might guess wrong then. It's still
O(n)
.I guess this solution has a very bad performance, concatane 4 maps and 4 reduces is not a good idea in terms of performance