Javascript. Tiddles and Bits.

Variable names can be any word that isn’t a reserved word (such as var). They may not include spaces. Digits can also be part of variable names—catch22 is a valid name, for example—but the name must not start with a digit. A variable name cannot include punctuation, except for the characters $ and _.

var x = prompt("What is your favorite sports team?")
alert("Love that bunch of players.")

var numberGuess = prompt("Guess a number. Any number. However, whatever you do, don't type in the number 3")

if (numberGuess == "3" || numberGuess == "three" || numberGuess == "THREE" || numberGuess == "Three") {
alert("I told you not to type in the number 3!") window.location = "https://www.youtube.com/watch?v=oHg5SJYRHA0" }

// Outputs: "Falsy."
logTruthiness(false);
// Outputs: "Falsy."
logTruthiness(null);
// Outputs: "Falsy."
logTruthiness(undefined);
// Outputs: "Falsy."
logTruthiness(NaN);
// Outputs: "Falsy."
logTruthiness(0);
// Outputs: "Falsy."
logTruthiness("");

&& (and) - false seeking
|| (or) - truth seeking

.push - add an element on to the end
.pop - remove an element from the end
.unshift - add an element to the front
.shift - remove an element from the front

for (var i = 0; i < bucket_list.length; i++) {
$( "body" ).append(bucket_list[i] + " ");
console.log(bucket_list[i]);
}

var append_strings = function (array) {
for (var i = 0; i < array.length; i++) {
$( "body" ).append(array[i] + " ");
}
}

append_strings(recipe)
append_strings(bucket_list)

var scrambled_poem = "roses red are bacon crispy i bacon love and is blue violets are"

var scrambled_array = scrambled_poem.split(" ");
var unscrambled_array = ""

unscrambled_array += scrambled_array.pop() + " " + scrambled_array.shift()

console.log(scrambled_array)
console.log(unscrambled_array)

(not all the code, just showing how forEach was used)

dog.toys.forEach(function(item) {
if (item === toy) {
result = dog.name;

prompt("Tell me everything you know.", "...");

do {
var yourName = prompt("Who are you?");
} while (!yourName);

console.log(yourName);

var result = 1; for (var counter = 0; counter < 10; counter = counter + 1)
result = result * 2;

console.log(result);

switch (prompt("What is the weather like?")) {
case "rainy":
console.log("Remember to bring an umbrella.");
break;
case "sunny":
console.log("Dress lightly.");
case "cloudy":
console.log("Go outside.");
break;
default:
console.log("Unknown weather type!");
break;
}

(don’t use them for variable names)

break case catch class const continue debugger default delete do else enum export extends false finally for function if implements import in instanceof interface let new null package private protected public return static super switch this throw true try typeof var void while with yield

var square = function(x)
{ return x * x; };

console.log(square(12));

Booleans & Comparators (Type the following into your console, can you guess what will be returned?)

- > !true
- > !false
- > !!false
- > !!true
- > !!"type coercion"
- > !!"all strings are 'truthy' except for..."
- > !!""
- > true && true
- > true && false
- > false && true
- > false && false
- > true || true
- > true || false
- > false || true
- > false || false
- > true && "what does this evalute to?"
- > false && "and this?"
- > true || "sigh, i'm not needed"
- > false || "default value"

var n = 0
console.log("I am called the Count... because I really love to count!")

while (n <= 50) {
console.log(n)
n += 2
}

console.log('fin!')

var n = 0

while (n <= 10) {
if (n < 10){
console.log(n+",")
} else {
console.log(n)
}
n++
}

for (var i in car) {
if (i === "color") {
console.log(car.color)
$("#favorite_car_colors").append(car.color)
}
}

for (var key in obj) {
var value = obj[key]
if (value === "down") {
console.log(key)
$("#direction_headed").append(key)
}
}

for (var i in obj) {
if (i === target_key) {
console.log(obj[i])
$('#direction_headed').append(obj[i])
}
}

var numbers = [2, 4, 5, 37, 0]
var doubled_numbers = {}

for (var i = 0; i < numbers.length; i++) {
key = numbers[i]
value = numbers[i] * 2
doubled_numbers[key] = value
$("#doubles").append("

" + key + " doubled is " + value + "

")
}

var a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
b = [];

for (var i = 0; i < a.length; ++i) {
if ((a[i] % 2) === 0) {
b.push(a[i]);
}
}

var gradebook = new Object()

gradebook.getAverage = function(name){
return average(gradebook[name].testScores);
}

var average = function(scores){
var total = 0
for (var i in scores)
total += scores[i];
return total / scores.length
}