split an array into two based on a index in javascript

Question

I have an array with a list of objects. I want to split this array at one particular index, say 4 (this in real is a variable). I want to store the second part of the split array into another array. Might be simple, but I am unable to think of a nice way to do this.

Answer 1

Use slice, as such:

var ar = [1,2,3,4,5,6];

var p1 = ar.slice(0,4);
var p2 = ar.slice(4);