can someone explain why return has to be stated twice

I'm still green for this

nice

Very readable. It could be condensed a bit but it is very easy to understand and well written. Great work!

Hmmm

Great solution

I'm sorry if I don't understand something, but this solution can pass test with empty array, isn't it?

Smart!

What is the year of that solution?

good work!

This is the first time my solution has matched the top solution! First time I've used array.map() as well.

Actually, the machine only knows what it will do with every position where you write a 'name'. It doesn't in fact read the name, to it it's just a code that means "this position, which is named 'name' will be coded accordingly with that which the function 'map' is already preprogrammed to do".
It's a common mistake when we are beginners trying understanding what is 'written', once that we humans are used to subjectively give written symbols intrinsic meaning, but the machine see things in a different way. You'll get used sometime, just don't give in.

you have to use the spoiler flag, otherwise everyone can see the code