Code quality: slice and splice

JavaScript
1

Hi, according to Slice and Splice

my code proposal is different than in the given answer. I flatted the object instead of looping each value to an array.

Does my proposal is bad?
To see the result, please click run.

Thanks!

2

Since the exercise doesn’t mention you have to use one specific way, as long as you pass the tests you should be fine. It’s not bad.