//extra TA office hours tomorrow

//helper methods?

//recall pizza class:
Pizza p = new Pizza(3, "large");
p.addTopping("mushrooms");
p.addTopping("cheese")
p.addTopping("green peppers")
p.addTopping("green peppers")
Pizza p = new Pizza(3, "large");
p.toString()
p.addTopping("green peppers")
p.addTopping("cheese")
p.toString()

//let's write removeTopping method
// make that toping null, then fill the hole with the last element
//we could shift back the rest to fill the hole, but the order of
//topping doesn't matter, so why make it slow!

Pizza p = new Pizza(3, "large");
p.addTopping("a");
p.addTopping("b");
p.addTopping("c");
p.toString()
p.removeTopping("c")
p.toString()
p.removeTopping("a")
p.toString()
p.removeTopping("b")
p.toString()
p.removeTopping("b")
p.toString()

//2d arrays
int[] a = new int[4];
a[0]
a[1]
int[][] b = new int[3][4];
b
b[0]
b[1]
b[2]
b[0][0]
b[1][0]
b[2][0]
b[3][0]
b[2][3]
b[2][4]
b[2][3] = 4;
b[1][2] = 34;
// b is a 2D (2 dimensional) array
// b has 3 rows, 4 columns: 12 elements
// A 2D array is an "array of arrays"
b
a.length
b.length
b[0].length
b[1].length
b[2].length
int[][] c = new int[3][];
c
c[0]
c[0] = new int[4];
c[1] = new int[500];
c[2] = new int[3];
c.length
c[0].length
c[1].length
c[2].length