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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.
Can remove the .mkString at the end by using Char literals instead of String literals for the brackets.
Will it be n^2 or linear?
Tecnhically, "word.toLowerCase.count" will be executed n times.
and the complexity method of this is N.
so it will be n^2. But you never now in Scala, any opinions?