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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.
I'm a newbie at coding and I'm trying to solve these katas with the knowledge I possess so far, so please be gentle. I saw a lot of answers that looked way simpler than mine, so there is definitely room for improvement in my solution.
I don't understand this notation. It obviously work, but can someone explain what does the arguments in the replace method mean?