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

spoiler flag, plz...

after a kata forcing me to learn regex I now start to appreciate it a lot!
"find pattern and do sth with it" vibe that regex methods give seems more readable than other methods (where lil setups scattered around & can be confusing at the beginning uh for a newbie like me)

Increased number of tests.

cleaned up

The comment in the initial code says to move 1's to the end.