[...] is called the spread syntax. When we write [...str], it spreads the string into an array of its individual characters. This is necessary because reverse() only works on arrays.

Without the spread (just [str]), you'd get an array with the entire string as a single element — not what we want in this case.

This solution is no longer valid.

its asked to order by name asc

No, that would lead to infinite recursion.

good!

I like the usage of recursion, pretty cool solution!

technical note:
"have been rounded" is not past tense.
And actually we can use
Present perfect for future... as written in
https://learnenglish.britishcouncil.org/grammar/english-grammar-reference/present-perfect

What is the point of using a recursion when you can do it much faster and simpler with a loop? I think recursion should be used only when it's necessary - going through all tree branches, for example.

Thank you so much!

Thanks a lot!)

'Looks like you've solved it'

Thank you.