[whilenot-dev]

> Also note that `Return<User>` should be just `User` if you prefer to specify the return type explicitly.

No? first_user = data[0] assigns User | undefined to first_user, since the list isn't guaranteed to be non-empty. I expect Return to be implemented as type Return<T> = T | undefined, so Return<User> makes sense.

[uallo]

You are correct if `noUncheckedIndexedAccess` is enabled. It is off by default (which is a pity, really).

I assumed `Return<User>` was a mistake, not a custom type as you suggest. But your interpretation seems more likely anyway.

[devjab]

Both score 7 now though.

This scores 6: function a(b) { return b[0]; }

This scores 3: const a = (a) => a;