In my eyes this slice of code is even worse than the array map one, where there is 2.5 pieces of logic (map, if, and 2 return that makes for the .5). In the ve

In my eyes this slice of code is even worse than the array map one, where there is 2.5 pieces of logic (map, if, and 2 return that makes for the .5). In the version you have 2 spread operators, an array construct and 3 hardcoded ints. I might not use the correct academic terms, and I might not be yet fully accustomed to es2015, but this way of writing stuff always make me pause and double check the code.