Codehs 8.1.5 — Manipulating 2d Arrays

var array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]; array.push([10, 11, 12]); // add new row console.log(array); // output: [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]]

To remove a row from a 2D array, you can use the splice() method.

// Iterating over a 2D array for (var i = 0; i < array.length; i++) for (var j = 0; j < array[i].length; j++) console.log(array[i][j]);