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

In filter function you can push your false items into another variable outside function:

var bad = [], good = [1,2,3,4,5];
good = good.filter(function (value) { if (value === false) { bad.push(value) } else { return true});

Of course value === false need to be real comparasion ;)

But it do almost that same operation like forEach. I think you should use forEach for better code readability.