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.
100% agree.
No, it's not flawed, but rather your solution did not pass because you mutated the input array. Mutating the input object is never a good practice anyway (undocumented side effects are just bad bad bad), so you have nobody but yourself to blame for this.
By the way, seriously, I really don't want to play Codewars Fun: Arrogance every day. It's frustrating.