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.
This not issue the given function mentions array as Number[] so u can change to any[]
It's return it (the array without duplicate), not return them (the duplicates). And nowhere it says you should create a new array with them. You also have a couple of examples in the description if you have any doubt.