Dividing an array by filter function

Question

I have a Javascript array that I would like to split into two based on whether a function called on each element returns true or false. Essentially

Answer 1

What about this?

[1,4,3,5,3,2].reduce( (s, x) => { s[ x > 3 ].push(x); return s;} , {true: [], false:[]} )

Probably this is more efficient then the spread operator

Or a bit shorter, but uglier

[1,4,3,5,3,2].reduce( (s, x) => s[ x > 3 ].push(x)?s:s , {true: [], false:[]} )