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.
Well, we all know this built-in function.
but i don't think this is what we should do in this kata.
we should write a similar function to the built-in function that do the same idea.