//1-D array
var arr = [1, 2, 3];
arr[1] = 6;

assert arr == [1, 6, 3], "1-D array failed";

//we need to go deeper
var barr = [
	[1, 2, 3],
	[4, 5, 6],
	[7, 8, 9]
];

barr[1][1] = 99;

assert barr == [[1, 2, 3],[4,99,6],[7,8,9]], "2-D array failed";