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.
Very true!
sort mutates the original array so spreading here creates a new reference and avoids mutation. Not necessary in the exercise, true, but still worth using in a real application
[...arr]no need for this spread lol.arris already an array