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Adding chapter 10 code
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‎chapter10/addN.html‎

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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>Return a function from a function</title>
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<script>
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function addN(n) {
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var adder = function(x) {
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return n + x;
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};
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return adder;
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}
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var add2 = addN(2);
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console.log(add2(10));
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console.log(add2(100));
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var add100 = addN(100);
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console.log(add100(1));
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console.log(add100(50));
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</script>
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</head>
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<body> </body>
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</html>
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‎chapter10/aloha.html‎

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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>Aloha</title>
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<script>
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function sayIt(translator) {
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var phrase = translator("Hello");
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alert(phrase);
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}
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function hawaiianTranslator(word) {
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if (word == "Hello") return "Aloha";
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if (word == "Goodbye") return "Aloha";
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}
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sayIt(hawaiianTranslator);
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</script>
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</head>
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<body> </body>
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</html>
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‎chapter10/cola.html‎

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<!doctype html>
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<html>
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<head>
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<title>Webville Cola</title>
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<meta charset="utf-8">
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<script>
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var products = [ { name: "Grapefruit", calories: 170, color: "red", sold: 8200 },
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{ name: "Orange", calories: 160, color: "orange", sold: 12101 },
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{ name: "Cola", calories: 210, color: "caramel", sold: 25412 },
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{ name: "Diet Cola", calories: 0, color: "caramel", sold: 43922 },
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{ name: "Lemon", calories: 200, color: "clear", sold: 14983 },
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{ name: "Raspberry", calories: 180, color: "pink", sold: 9427 },
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{ name: "Root Beer", calories: 200, color: "caramel", sold: 9909 },
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{ name: "Water", calories: 0, color: "clear", sold: 62123 }
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];
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// sort and display the scores
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console.log("\n------- sorting by sold -------");
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products.sort(compareSold);
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printProducts(products);
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console.log("\n------- sorting by name -------");
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products.sort(compareName);
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printProducts(products);
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console.log("\n------- sorting by calories -------");
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products.sort(compareCalories);
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printProducts(products);
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console.log("\n------- sorting by color -------");
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products.sort(compareColor);
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printProducts(products);
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function compareName(colaA, colaB) {
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if (colaA.name > colaB.name) {
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return 1;
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} else if (colaA.name === colaB.name) {
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return 0;
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} else {
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return -1;
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}
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}
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function compareCalories(colaA, colaB) {
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if (colaA.calories > colaB.calories) {
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return 1;
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} else if (colaA.calories === colaB.calories) {
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return 0;
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} else {
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return -1;
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}
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}
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function compareColor(colaA, colaB) {
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if (colaA.color > colaB.color) {
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return 1;
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} else if (colaA.color === colaB.color) {
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return 0;
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} else {
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return -1;
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}
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}
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function compareSold(colaA, colaB) {
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if (colaA.sold > colaB.sold) {
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return 1;
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} else if (colaA.sold === colaB.sold) {
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return 0;
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} else {
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return -1;
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}
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}
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function printProducts(products) {
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for (var i = 0; i < products.length; i++) {
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console.log("Name: " + products[i].name +
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", Calories: " + products[i].calories +
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", Color: " + products[i].color +
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", Sold: " + products[i].sold);
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}
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}
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</script>
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</head>
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<body> </body>
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</html>
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‎chapter10/fun.html‎

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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>Fun</title>
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<script>
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function fun(echo) {
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console.log(echo);
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};
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fun("hello");
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function boo(aFunction) {
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aFunction("boo");
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}
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boo(fun);
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console.log(fun);
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fun(boo);
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var moreFun = fun;
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moreFun("hello again");
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function echoMaker() {
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return fun;
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}
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var bigFun = echoMaker();
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bigFun("Is there an echo?");
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</script>
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</head>
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<body>
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</body>
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</html>
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‎chapter10/plane.html‎

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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>First class functions</title>
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<script>
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var passengers = [ { name: "Jane Doloop", paid: true, ticket: "coach" },
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{ name: "Dr. Evel", paid: true, ticket: "firstclass" },
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{ name: "Sue Property", paid: false, ticket: "firstclass" },
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{ name: "John Funcall", paid: true, ticket: "premium" } ];
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function processPassengers(passengers, test) {
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for (var i = 0; i < passengers.length; i++) {
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if (test(passengers[i])) {
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return false;
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}
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}
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return true;
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}
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function checkNoFlyList(passenger) {
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return (passenger.name === "Dr. Evel");
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}
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function checkNotPaid(passenger) {
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return (!passenger.paid);
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}
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function printPassenger(passenger) {
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var message = passenger.name;
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if (passenger.paid === true) {
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message = message + " has paid";
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} else {
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message = message + " has not paid";
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}
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console.log(message);
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return false;
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}
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//
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// plane can only fly if every passenger is on the fly flist
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//
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var allCanFly = processPassengers(passengers, checkNoFlyList);
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if (!allCanFly) {
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console.log("The plane can't take off: we have a passenger on the no fly list.");
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}
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//
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// plane can only fly if every passenger has paid
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//
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var allPaid = processPassengers(passengers, checkNotPaid);
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if (!allPaid) {
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console.log("The plane can't take off: not everyone has paid.");
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}
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//
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// we don't care about the result here; we're just using
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// processPassengers to display the passenger list
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//
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processPassengers(passengers, printPassenger);
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function createDrinkOrder(passenger) {
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var orderFunction;
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if (passenger.ticket === "firstclass") {
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orderFunction = function() {
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alert("Would you like a cocktail or wine?");
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};
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} else if (passenger.ticket === "premium") {
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orderFunction = function() {
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alert("Would you like wine, cola or water?");
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};
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} else {
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orderFunction = function() {
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alert("Your choice is cola or water.");
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};
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}
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return orderFunction;
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}
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function createDinnerOrder(passenger) {
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var orderFunction;
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if (passenger.ticket === "firstclass") {
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orderFunction = function() {
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alert("Would you like chicken or pasta?");
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};
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} else if (passenger.ticket === "premium") {
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orderFunction = function() {
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alert("Would you like a snack box or cheese plate?");
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};
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} else {
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orderFunction = function() {
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alert("Would you like peanuts or pretzels?");
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};
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}
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return orderFunction;
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}
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function pickupTrash() {
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alert("Can I have your trash, please?");
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}
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function serveCustomer(passenger) {
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var getDrinkOrderFunction = createDrinkOrder(passenger);
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var getDinnerOrderFunction = createDinnerOrder(passenger);
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getDrinkOrderFunction();
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// get dinner order
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getDinnerOrderFunction();
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getDrinkOrderFunction();
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getDrinkOrderFunction();
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// show movie
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getDrinkOrderFunction();
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// pick up trash
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pickupTrash();
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}
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function servePassengers(passengers) {
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for (var i = 0; i < passengers.length; i++) {
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serveCustomer(passengers[i]);
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}
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}
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servePassengers(passengers);
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</script>
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</head>
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<body>
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</body>
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</html>
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‎chapter10/shellgame.html‎

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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>Shell Game</title>
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<script>
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var winner = function() { alert("WINNER!") };
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var loser = function() { alert("LOSER!") };
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// let's test as a warm up
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winner();
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// let's assign to other variables for practice
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var a = winner;
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var b = loser;
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var c = loser;
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a();
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b();
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// now let's try your luck with a shall game
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c = a;
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a = b;
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b = c;
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c = a;
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a = c;
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a = b;
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b = c;
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a();
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</script>
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</head>
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<body> </body>
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</html>
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