I was totally over thinking this.. thought you had to pass the args into the function so it wouldn't let me pass any tests.

I'm just curious as to why this isn't the "best practice" it's this the "best" way to break the code down?

i dont know why should i answered no and yes..can you tell me plz?

Empty array [[],[],[],[],[],[],[],[],[]] can be created like this:

Array(...Array(n)).map(() => Array()); // n is number of inner arrays.