iframe-proxy | Sunbelt Computer Software

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<!doctype html>
<html lang="en">
<meta charset="utf-8">
<title>First class functions</title>
var passengers = [  { name: "Jane Doloop", paid: true, ticket: "coach" },
					{ name: "Dr. Evel", paid: true, ticket: "firstclass" },
					{ name: "Sue Property", paid: false, ticket: "firstclass" },
					{ name: "John Funcall", paid: true, ticket: "premium" } ];
function processPassengers(passengers, test) {
	for (var i = 0; i < passengers.length; i++) {
		if (test(passengers[i])) {
			return false;
	return true;
function checkNoFlyList(passenger) {
	return (passenger.name === "Dr. Evel");
function checkNotPaid(passenger) {
	return (!passenger.paid);
function printPassenger(passenger) {
	var message = passenger.name;
	if (passenger.paid) {
		message = message + " has paid";
		message = message + " has not paid";
	console.log(message);
	return false;
// plane can only fly if every passenger is on the fly flist
var allCanFly = processPassengers(passengers, checkNoFlyList);
if (!allCanFly) {
	console.log("The plane can't take off: we have a passenger on the no fly list.");
// plane can only fly if every passenger has paid
var allPaid = processPassengers(passengers, checkNotPaid);
if (!allPaid) {
	console.log("The plane can't take off: not everyone has paid.");
// we don't care about the result here; we're just using 
// processPassengers to display the passenger list
processPassengers(passengers, printPassenger);
function createDrinkOrder(passenger) {
	var orderFunction;
	if (passenger.ticket === "firstclass") {
		orderFunction = function() {
			alert("Would you like a cocktail or wine?");
	} else if (passenger.ticket === "premium") {
		orderFunction = function() {
			alert("Would you like wine, cola or water?");
		orderFunction = function() {
			alert("Your choice is cola or water.");
	return orderFunction;
function createDinnerOrder(passenger) {
	var orderFunction;
	if (passenger.ticket === "firstclass") {
		orderFunction = function() {
			alert("Would you like chicken or pasta?");
	} else if (passenger.ticket === "premium") {
		orderFunction = function() {
			alert("Would you like a snack box or cheese plate?");
		orderFunction = function() {
			alert("Would you like peanuts or pretzels?");
	return orderFunction;
function pickupTrash() {
	alert("Can I have your trash, please?");
function serveCustomer(passenger) {
	var getDrinkOrderFunction = createDrinkOrder(passenger);
	var getDinnerOrderFunction = createDinnerOrder(passenger);
	getDrinkOrderFunction();
	// get dinner order
	getDinnerOrderFunction();
	getDrinkOrderFunction();
	getDrinkOrderFunction();
	// show movie
	getDrinkOrderFunction();
	// pick up trash
	pickupTrash();
function servePassengers(passengers) {
	for (var i = 0; i < passengers.length; i++) {
		serveCustomer(passengers[i]);
servePassengers(passengers);
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