reorganizing some more

2021-12-01 14:39:18 +01:00
parent f8bde27fc6
commit 9116b55477
37 changed files with 998 additions and 679 deletions
@@ -0,0 +1,11 @@
 let bool1 = false;
 let bool2 = true;
 console.log(typeof bool1)
 let str1 = "JavaScript is fun!";
 let str2 = "JavaScript is fun!";
 console.log("These two strings are the same:", str1 === str2);
 let sym1 = Symbol("JavaScript is fun!");
 let sym2 = Symbol("JavaScript is fun!");
 console.log("These two Symbols are the same:", sym1 === sym2);
@@ -0,0 +1,43 @@
 // let nr1 = 2;
 // let nr2 = "2";
 // console.log(nr1 * nr2);
 // let nr1 = 2;
 // let nr2 = "2";
 // console.log(nr1 + nr2);
 // let nrToStr = 6;
 // nrToStr = String(nrToStr);
 // console.log(nrToStr, typeof nrToStr);
 // let strToNr = "12";
 // strToNr = Number(strToNr);
 // console.log(strToNr, typeof strToNr);
 // let strToBool = "any string will return true";
 // strToBool = Boolean(strToBool);
 // console.log(strToBool, typeof strToBool);
 // let nullToNr = null;
 // nullToNr = Number(nullToNr);
 // console.log("null", nullToNr, typeof nullToNr);
 // let strToNr = "";
 // strToNr = Number(strToNr);
 // console.log("empty string", strToNr, typeof strToNr);
 // let strToNr2 = "hello";
 // strToNr2 = Number(strToNr2);
 // console.log(strToNr2, typeof strToNr2);
 // let strToBool = "";
 // strToBool = Boolean(strToBool);
 // console.log(strToBool, typeof strToBool);
 // let strToBool2 = "false";
 // strToBool2 = Boolean(strToBool2);
 // console.log(strToBool2, typeof strToBool2);
 // let nr1 = 2;
 // let nr2 = "2";
 // console.log(nr1 + Number(nr2));
@@ -1,184 +0,0 @@
 // let firstname = "Maria";
 // firstname = "Jacky";
 // let nr1 = 12;
 // var nr2 = 8;
 // const pi = 3.14159;
 // throws a TypeError
 // const someConstant = 3;
 // someConstant = 4;
 // let singleString = 'Hi there!';
 // let doubleString = "How are you?";
 // let language = "JavaScript";
 // let message = `Let's learn ${language}`;
 // console.log(message);
 // let intNr = 1;
 // let decNr = 1.5;
 // let expNr = 1.4e15;
 // let bigNr = 90071992547409920n;
 // typeError
 // let result = bigNr + intNr;
 // let bool1 = false;
 // let bool2 = true;
 // console.log(typeof bool1)
 // let str1 = "JavaScript is fun!";
 // let str2 = "JavaScript is fun!";
 // console.log("These two strings are the same:", str1 === str2);
 // let sym1 = Symbol("JavaScript is fun!");
 // let sym2 = Symbol("JavaScript is fun!");
 // console.log("These two Symbols are the same:", sym1 === sym2);
 // let unassigned;
 // console.log(unassigned);
 // let terribleThingToDo = undefined;
 // let lastname;
 // console.log("Same undefined:", lastname === terribleThingToDo);
 // let betterOption = null;
 // console.log("Same null:", lastname === betterOption);
 // let empty = null;
 // let nr1 = 2;
 // let nr2 = "2";
 // console.log(nr1 * nr2);
 // let nr1 = 2;
 // let nr2 = "2";
 // console.log(nr1 + nr2);
 // let nrToStr = 6;
 // nrToStr = String(nrToStr);
 // console.log(nrToStr, typeof nrToStr);
 // let strToNr = "12";
 // strToNr = Number(strToNr);
 // console.log(strToNr, typeof strToNr);
 // let strToBool = "any string will return true";
 // strToBool = Boolean(strToBool);
 // console.log(strToBool, typeof strToBool);
 // let nullToNr = null;
 // nullToNr = Number(nullToNr);
 // console.log("null", nullToNr, typeof nullToNr);
 // let strToNr = "";
 // strToNr = Number(strToNr);
 // console.log("empty string", strToNr, typeof strToNr);
 // let strToNr2 = "hello";
 // strToNr2 = Number(strToNr2);
 // console.log(strToNr2, typeof strToNr2);
 // let strToBool = "";
 // strToBool = Boolean(strToBool);
 // console.log(strToBool, typeof strToBool);
 // let strToBool2 = "false";
 // strToBool2 = Boolean(strToBool2);
 // console.log(strToBool2, typeof strToBool2);
 // let nr1 = 2;
 // let nr2 = "2";
 // console.log(nr1 + Number(nr2));
 // let str = "Hello, what's your name? Is it \"Mike\"?";
 // console.log(str);
 // let str2 = 'Hello, what\'s your name? Is it "Mike"?';
 // console.log(str2);
 // let str3 = "New \nline."
 // let str4 = "I'm containing a backslash: \\!";
 // console.log(str3);
 // console.log(str4);
 // let str = "Hello";
 // let nr = 7;
 // let bigNr = 12345678901234n;
 // let bool = true;
 // let sym = Symbol("unique");
 // let undef = undefined;
 // let unknown = null;
 // console.log("str", typeof str);
 // console.log("nr", typeof nr);
 // console.log("bigNr", typeof bigNr);
 // console.log("bool", typeof bool);
 // console.log("sym", typeof sym);
 // console.log("undef", typeof undef);
 // console.log("unknown", typeof unknown);
 // let nr1 = 12;
 // let nr2 = 14;
 // let str1 = "Hello ";
 // let str2 = "addition";
 // let result1 = nr1 + nr2;
 // let result2 = str1 + str2;
 // console.log(result1, result2);
 // let nr1 = 20;
 // let nr2 = 4;
 // let str1 = "Hi ";
 // let nr3 = 3;
 // let result1 = nr1 - nr2;
 // let result2 = str1 - nr3;
 // console.log(result1, result2);
 // let nr1 = 15;
 // let nr2 = 10;
 // let str1 = "Hi";
 // let nr3 = 3;
 // let result1 = nr1 * nr2;
 // let result2 = str1 * nr3;
 // console.log(result1, result2);
 // let nr1 = 30;
 // let nr2 = 5;
 // let result1 = nr1 / nr2;
 // console.log(result1);
 // let nr1 = 2;
 // let nr2 = 3;
 // let result1 = nr1 ** nr2;
 // console.log(result1);
 // let nr1 = 10;
 // let nr2 = 3;
 // let result1 = nr1 % nr2;
 // console.log(`${nr1} % ${nr2} = ${result1}`);
 // let nr3 = 8;
 // let nr4 = 2;
 // let result2 = nr3 % nr4;
 // console.log(`${nr3} % ${nr4} = ${result2}`);
 // let nr5 = 15;
 // let nr6 = 4;
 // let result3 = nr5 % nr6;
 // console.log(`${nr5} % ${nr6} = ${result3}`);
 // let nr = 4;
 // nr++;
 // console.log(nr);
 // let nr = 2;
 // console.log(nr++);
 // console.log(nr);
 // let nr = 2;
 // console.log(++nr);
 let nr1 = 4;
 let nr2 = 5;
 let nr3 = 2;
 console.log(nr1++ + ++nr2 * nr3++);
@@ -0,0 +1,25 @@
 let str = "Hello, what's your name? Is it \"Mike\"?";
 console.log(str);
 let str2 = 'Hello, what\'s your name? Is it "Mike"?';
 console.log(str2);
 let str3 = "New \nline."
 let str4 = "I'm containing a backslash: \\!";
 console.log(str3);
 console.log(str4);
 let str = "Hello";
 let nr = 7;
 let bigNr = 12345678901234n;
 let bool = true;
 let sym = Symbol("unique");
 let undef = undefined;
 let unknown = null;
 console.log("str", typeof str);
 console.log("nr", typeof nr);
 console.log("bigNr", typeof bigNr);
 console.log("bool", typeof bool);
 console.log("sym", typeof sym);
 console.log("undef", typeof undef);
 console.log("unknown", typeof unknown);
@@ -0,0 +1,64 @@
 // let nr1 = 12;
 // let nr2 = 14;
 // let str1 = "Hello ";
 // let str2 = "addition";
 // let result1 = nr1 + nr2;
 // let result2 = str1 + str2;
 // console.log(result1, result2);
 // let nr1 = 20;
 // let nr2 = 4;
 // let str1 = "Hi ";
 // let nr3 = 3;
 // let result1 = nr1 - nr2;
 // let result2 = str1 - nr3;
 // console.log(result1, result2);
 // let nr1 = 15;
 // let nr2 = 10;
 // let str1 = "Hi";
 // let nr3 = 3;
 // let result1 = nr1 * nr2;
 // let result2 = str1 * nr3;
 // console.log(result1, result2);
 // let nr1 = 30;
 // let nr2 = 5;
 // let result1 = nr1 / nr2;
 // console.log(result1);
 // let nr1 = 2;
 // let nr2 = 3;
 // let result1 = nr1 ** nr2;
 // console.log(result1);
 // let nr1 = 10;
 // let nr2 = 3;
 // let result1 = nr1 % nr2;
 // console.log(`${nr1} % ${nr2} = ${result1}`);
 // let nr3 = 8;
 // let nr4 = 2;
 // let result2 = nr3 % nr4;
 // console.log(`${nr3} % ${nr4} = ${result2}`);
 // let nr5 = 15;
 // let nr6 = 4;
 // let result3 = nr5 % nr6;
 // console.log(`${nr5} % ${nr6} = ${result3}`);
 // let nr = 4;
 // nr++;
 // console.log(nr);
 // let nr = 2;
 // console.log(nr++);
 // console.log(nr);
 // let nr = 2;
 // console.log(++nr);
 let nr1 = 4;
 let nr2 = 5;
 let nr3 = 2;
 console.log(nr1++ + ++nr2 * nr3++);
@@ -0,0 +1,11 @@
 let unassigned;
 console.log(unassigned);
 let terribleThingToDo = undefined;
 let lastname;
 console.log("Same undefined:", lastname === terribleThingToDo);
 let betterOption = null;
 console.log("Same null:", lastname === betterOption);
 let empty = null;
@@ -0,0 +1,10 @@
 let firstname = "Maria";
 firstname = "Jacky";
 let nr1 = 12;
 var nr2 = 8;
 const pi = 3.14159;
 // throws a TypeError
 const someConstant = 3;
 someConstant = 4;
@@ -0,0 +1,7 @@
 let intNr = 1;
 let decNr = 1.5;
 let expNr = 1.4e15;
 let bigNr = 90071992547409920n;
 // typeError
 let result = bigNr + intNr;
@@ -0,0 +1,6 @@
 let singleString = 'Hi there!';
 let doubleString = "How are you?";
 let language = "JavaScript";
 let message = `Let's learn ${language}`;
 console.log(message);
@@ -0,0 +1,100 @@
 arr1 = new Array("purple", "green", "yellow");
 arr2 = ["black", "orange", "pink"];
 arr3 = new Array(10);
 arr4 = [10];
 console.log(arr3);
 console.log(arr4);
 cars = ["Toyota", "Renault", "Volkswagen"];
 console.log(cars[0]);
 console.log(cars[1]);
 console.log(cars[2]);
 console.log(cars[3]);
 console.log(cars[-1]);
 cars[0] = "Tesla";
 console.log(cars[0]);
 cars[3] = "Kia";
 cars[-1] = "Fiat";
 console.log(cars[3]);
 console.log(cars[-1]);
 colors = ["black", "orange", "pink"]
 booleans = [true, false, false, true];
 emptyArray = [];
 console.log("Length of colors:", colors.length);
 console.log("Length of booleans:", booleans.length);
 console.log("Length of emtpy array:", emptyArray.length);
 lastElement = colors[colors.length - 1];
 console.log(lastElement);
 numbers = [12, 24, 36];
 numbers[-1] = 0;
 numbers[5] = 48;
 console.log(numbers.length);
 console.log("numbers", numbers);
 favoriteFruits = ["grapefruit", "orange", "lemon"];
 favoriteFruits.push("tangerine");
 let lengthOfFavoriteFruits = favoriteFruits.push("lime");
 console.log(lengthOfFavoriteFruits);
 console.log(favoriteFruits);
 let arrOfShapes = ["circle", "triangle", "rectangle", "pentagon"];
 arrOfShapes.splice(2, 0, "square", "trapezoid");
 console.log(arrOfShapes);
 let arr5 = [1, 2, 3];
 let arr6 = [4, 5, 6];
 let arr7 = arr5.concat(arr6);
 console.log(arr7);
 let arr8 = arr7.concat(7, 8, 9);
 console.log(arr8);
 arr8.pop();
 console.log(arr8);
 arr8.shift();
 console.log(arr8);
 arr8.splice(1, 3);
 console.log(arr8);
 delete arr8[0];
 console.log(arr8); 
 let findValue = arr8.find(() => e === 6);
 let findValue2 = arr8.find(() => e === 8);
 console.log(findValue, findValue2);
 let findIndex = arr8.indexOf(6);
 let findIndex2 = arr8.indexOf(10);
 let findIndex3 = arr8.indexOf(6, 2);
 console.log(findIndex, findIndex2, findIndex3);
 let animals = ["dog", "horse", "cat", "platypus", "dog"]
 let lastDog = animals.lastIndexOf("dog");
 console.log(lastDog);
 let names = ["James", "Alicia", "Fatiha", "Maria", "Bert"];
 names.sort();
 let ages = [18, 72, 33, 56, 40];
 ages.sort();
 console.log(names);
 console.log(ages);
 names.reverse();
 console.log(names);
 console.log(typeof arr1);
@@ -1,104 +1,3 @@
 arr1 = new Array("purple", "green", "yellow");
 arr2 = ["black", "orange", "pink"];
 arr3 = new Array(10);
 arr4 = [10];
 console.log(arr3);
 console.log(arr4);
 cars = ["Toyota", "Renault", "Volkswagen"];
 console.log(cars[0]);
 console.log(cars[1]);
 console.log(cars[2]);
 console.log(cars[3]);
 console.log(cars[-1]);
 cars[0] = "Tesla";
 console.log(cars[0]);
 cars[3] = "Kia";
 cars[-1] = "Fiat";
 console.log(cars[3]);
 console.log(cars[-1]);
 colors = ["black", "orange", "pink"]
 booleans = [true, false, false, true];
 emptyArray = [];
 console.log("Length of colors:", colors.length);
 console.log("Length of booleans:", booleans.length);
 console.log("Length of emtpy array:", emptyArray.length);
 lastElement = colors[colors.length - 1];
 console.log(lastElement);
 numbers = [12, 24, 36];
 numbers[-1] = 0;
 numbers[5] = 48;
 console.log(numbers.length);
 console.log("numbers", numbers);
 favoriteFruits = ["grapefruit", "orange", "lemon"];
 favoriteFruits.push("tangerine");
 let lengthOfFavoriteFruits = favoriteFruits.push("lime");
 console.log(lengthOfFavoriteFruits);
 console.log(favoriteFruits);
 let arrOfShapes = ["circle", "triangle", "rectangle", "pentagon"];
 arrOfShapes.splice(2, 0, "square", "trapezoid");
 console.log(arrOfShapes);
 let arr5 = [1, 2, 3];
 let arr6 = [4, 5, 6];
 let arr7 = arr5.concat(arr6);
 console.log(arr7);
 let arr8 = arr7.concat(7, 8, 9);
 console.log(arr8);
 arr8.pop();
 console.log(arr8);
 arr8.shift();
 console.log(arr8);
 arr8.splice(1, 3);
 console.log(arr8);
 delete arr8[0];
 console.log(arr8); 
 let findValue = arr8.find(() => e === 6);
 let findValue2 = arr8.find(() => e === 8);
 console.log(findValue, findValue2);
 let findIndex = arr8.indexOf(6);
 let findIndex2 = arr8.indexOf(10);
 let findIndex3 = arr8.indexOf(6, 2);
 console.log(findIndex, findIndex2, findIndex3);
 let animals = ["dog", "horse", "cat", "platypus", "dog"]
 let lastDog = animals.lastIndexOf("dog");
 console.log(lastDog);
 let names = ["James", "Alicia", "Fatiha", "Maria", "Bert"];
 names.sort();
 let ages = [18, 72, 33, 56, 40];
 ages.sort();
 console.log(names);
 console.log(ages);
 names.reverse();
 console.log(names);
 console.log(typeof arr1);
 let dog = { dogName: "JavaScript", 
            weight: 2.4, 
            color: "brown", 
@@ -0,0 +1,49 @@
 // let rain = true;
 // if(rain){
 //   console.log("** Taking my umbrella when I need to go outside **");
 // } else {
 //   console.log("** I can leave my umbrella at home **");
 // }
 // if(expression) {
 //   // code associated with the if block
 //   // will only be executed if the expression is true
 // } else {
 //   // code associated with the else block
 //   // we don't need an else block, it is optional
 //   // this code will only be executed if the expression is false
 // }
 let age = 16;
 if(age < 18) {
  console.log("We're very sorry, but you can't get in under 18");
 } else {
  console.log("Welcome!");
 }
 if(age < 3){
  console.log("Access is free under three.");
 } else if(age >=3 && age < 12) {
  console.log("With the child discount, the access fee is 5 dollar");
 } else if(age >=12 && age < 65) {
  console.log("A regular ticket costs 10 dollar.");
 } else if(age >= 65) {
  console.log("A ticket is 7 dollars.");
 }
 if(age < 3){
  console.log("Access is free under three.");
 } else if(age < 12) {
  console.log("With the child discount, the access fee is 5 dollar");
 } else if(age < 65) {
  console.log("A regular ticket costs 10 dollar.");
 } else if(age >= 65) {
  console.log("A ticket is 7 dollars.");
 }
 let access = age < 18 ? "denied" : "allowed";
 console.log(access);
 age < 18 ? console.log("denied") : console.log("allowed");
@@ -1,53 +1,3 @@
 // let rain = true;
 // if(rain){
 //   console.log("** Taking my umbrella when I need to go outside **");
 // } else {
 //   console.log("** I can leave my umbrella at home **");
 // }
 // if(expression) {
 //   // code associated with the if block
 //   // will only be executed if the expression is true
 // } else {
 //   // code associated with the else block
 //   // we don't need an else block, it is optional
 //   // this code will only be executed if the expression is false
 // }
 let age = 16;
 if(age < 18) {
  console.log("We're very sorry, but you can't get in under 18");
 } else {
  console.log("Welcome!");
 }
 if(age < 3){
  console.log("Access is free under three.");
 } else if(age >=3 && age < 12) {
  console.log("With the child discount, the access fee is 5 dollar");
 } else if(age >=12 && age < 65) {
  console.log("A regular ticket costs 10 dollar.");
 } else if(age >= 65) {
  console.log("A ticket is 7 dollars.");
 }
 if(age < 3){
  console.log("Access is free under three.");
 } else if(age < 12) {
  console.log("With the child discount, the access fee is 5 dollar");
 } else if(age < 65) {
  console.log("A regular ticket costs 10 dollar.");
 } else if(age >= 65) {
  console.log("A ticket is 7 dollars.");
 }
 let access = age < 18 ? "denied" : "allowed";
 console.log(access);
 age < 18 ? console.log("denied") : console.log("allowed");
 let activity = "Lunch";
 if(activity === "Get up") {
@@ -1,127 +1,3 @@
 let i = 0;
 while (i < 10) {
  console.log(i);
  i++;
 }
 let someArray = ["Mike", "Antal", "Marc", "Emir", "Louiza", "Jacky"];
 let notFound = true;
 while (notFound && someArray.length > 0) {
  if (someArray[0] === "Louiza") {
    console.log("Found her!");
    notFound = false;
  } else {
    someArray.shift();
  }
 }
 console.log(someArray);
 let nr1 = 0;
 let nr2 = 1;
 let temp;
 fibonacciArray = [];
 while (fibonacciArray.length < 25) {
  fibonacciArray.push(nr1);
  temp = nr1 + nr2;
  nr1 = nr2;
  nr2 = temp;
 }
 console.log(fibonacciArray);
 do {
  // code to be executed if the condition is true
 } while (true);
 let number;
 do {
  number = prompt("Please enter a number between 0 and 100: ");
 } while (!(number >= 0 && number < 100));
 for (let i = 0; i < 10; i++) {
  console.log(i);
 }
 let arr = [];
 for (let i = 0; i < 100; i++) {
  arr.push(i);
 }
 let arr = [];
 for (let i = 0; i < 100; i = i + 2) {
  arr.push(i);
 }
 let arrOfArrays = [];
 for (let i = 0; i < 3; i++) {
  arrOfArrays.push([]);
  for (let j = 0; j < 7; j++) {
    arrOfArrays[i].push(j);
  }
 }
 console.log(arrOfArrays);
 let names = ["chantal", "john", "maxime", "bobbi", "jair"];
 for (let i = 0; i < names.length; i++) {
  console.log(names[i]);
 }
 //let names = ["chantal", "john", "maxime", "bobbi", "jair"];
 for (let i = 0; i < names.length; i++) {
  names[i] = "hello " + names[i];
 }
 console.log(names);
 for (let name of names) {
  console.log(name);
 }
 let car = {
  model: "Golf",
  make: "Volkswagen",
  year: 1999,
  color: "black",
 };
 for (let prop in car) {
  console.log(car[prop]);
 }
 for (let prop in car) {
  console.log(prop);
 }
 let cars = [
  {
    model: "Golf",
    make: "Volkswagen",
    year: 1999,
    color: "black",
  },
  {
    model: "Picanto",
    make: "Kia",
    year: 2020,
    color: "red",
  },
  {
    model: "Peugeot",
    make: "208",
    year: 2021,
    color: "black",
  },
  {
    model: "Fiat",
    make: "Punto",
    year: 2020,
    color: "black",
  },
 ];
 for (let i = 0; i < 10; i++) {
  console.log(i);
  if (i === 4) {
@@ -0,0 +1,8 @@
 do {
  // code to be executed if the condition is true
 } while (true);
 let number;
 do {
  number = prompt("Please enter a number between 0 and 100: ");
 } while (!(number >= 0 && number < 100));
@@ -0,0 +1,34 @@
 for (let i = 0; i < 10; i++) {
  console.log(i);
 }
 let arr = [];
 for (let i = 0; i < 100; i++) {
  arr.push(i);
 }
 let arr = [];
 for (let i = 0; i < 100; i = i + 2) {
  arr.push(i);
 }
 let arrOfArrays = [];
 for (let i = 0; i < 3; i++) {
  arrOfArrays.push([]);
  for (let j = 0; j < 7; j++) {
    arrOfArrays[i].push(j);
  }
 }
 console.log(arrOfArrays);
 let names = ["chantal", "john", "maxime", "bobbi", "jair"];
 for (let i = 0; i < names.length; i++) {
  console.log(names[i]);
 }
 //let names = ["chantal", "john", "maxime", "bobbi", "jair"];
 for (let i = 0; i < names.length; i++) {
  names[i] = "hello " + names[i];
 }
 console.log(names);
@@ -0,0 +1,45 @@
 for (let name of names) {
  console.log(name);
 }
 let car = {
  model: "Golf",
  make: "Volkswagen",
  year: 1999,
  color: "black",
 };
 for (let prop in car) {
  console.log(car[prop]);
 }
 for (let prop in car) {
  console.log(prop);
 }
 let cars = [
  {
    model: "Golf",
    make: "Volkswagen",
    year: 1999,
    color: "black",
  },
  {
    model: "Picanto",
    make: "Kia",
    year: 2020,
    color: "red",
  },
  {
    model: "Peugeot",
    make: "208",
    year: 2021,
    color: "black",
  },
  {
    model: "Fiat",
    make: "Punto",
    year: 2020,
    color: "black",
  },
 ];
@@ -0,0 +1,33 @@
 let i = 0;
 while (i < 10) {
  console.log(i);
  i++;
 }
 let someArray = ["Mike", "Antal", "Marc", "Emir", "Louiza", "Jacky"];
 let notFound = true;
 while (notFound && someArray.length > 0) {
  if (someArray[0] === "Louiza") {
    console.log("Found her!");
    notFound = false;
  } else {
    someArray.shift();
  }
 }
 console.log(someArray);
 let nr1 = 0;
 let nr2 = 1;
 let temp;
 fibonacciArray = [];
 while (fibonacciArray.length < 25) {
  fibonacciArray.push(nr1);
  temp = nr1 + nr2;
  nr1 = nr2;
  nr2 = temp;
 }
 console.log(fibonacciArray);
@@ -0,0 +1,59 @@
 function doingStuffAnonymously() {
  console.log("Not so secret though.");
 }
 let functionVariable = function () {
  console.log("Not so secret though.");
 };
 functionVariable();
 function doFlexibleStuff(executeStuff) {
  executeStuff();
  console.log("Inside doFlexibleStuffFunction.");
 }
 doFlexibleStuff(functionVariable);
 let anotherFunctionVariable = function () {
  console.log("Another anonymous function implementation.");
 };
 doFlexibleStuff(anotherFunctionVariable);
 function doOuterFunctionStuff(nr) {
  console.log("Outer function");
  doInnerFunctionStuff(nr);
  function doInnerFunctionStuff(x) {
    console.log(x + 7);
    console.log("I can access outer variables:", nr);
  }
 }
 doOuterFunctionStuff(2);
 function doOuterFunctionStuff(nr) {
  doInnerFunctionStuff(nr);
  function doInnerFunctionStuff(x) {
    let z = 10;
  }
  console.log("Not accessible:", z);
 }
 doOuterFunctionStuff(2);
 function doOuterFunctionStuff(nr) {
  doInnerFunctionStuff(nr);
  function doInnerFunctionStuff(x) {
    let z = 10;
  }
 }
 doInnerFunctionStuff(3);
 let youGotThis = function () {
  console.log("You're doing really well, keep coding!");
 };
 setTimeout(youGotThis, 1000);
 setInterval(youGotThis, 1000);
@@ -0,0 +1,51 @@
 function hiThere() {
  let you = prompt("What's your name? ");
  console.log("Hello", you, "!");
 }
 hiThere();
 console.log("this is an argument");
 prompt("argument here too");
 let arr = [];
 arr.push("argument");
 function addTwoNumbers(x, y) {
  console.log(x + y);
 }
 addTwoNumbers(3, 4);
 addTwoNumbers(12, -90);
 function myFunc(param1, param2) {
  // code of the function;
 }
 myFunc("arg1", "arg2");
 function addTwoNumbers(x = 2, y = 3) {
  console.log(x + y);
 }
 addTwoNumbers();
 addTwoNumbers(6, 6);
 addTwoNumbers(10);
 let favoriteSubject = prompt("What is your favorite subject?");
 let result = addTwoNumbers(4, 5);
 console.log(result);
 function addTwoNumbers(x, y) {
  return x + y;
 }
 let results = [];
 for (let i = 0; i < 10; i++) {
  let result = addTwoNumbers(i, 2 * i);
  results.push(result);
 }
 console.log(results);
@@ -0,0 +1,35 @@
 function getRecursive(nr) {
  console.log(nr);
  getRecursive(--nr);
 }
 getRecursive(3);
 function logRecursive(nr) {
  console.log("Started function:", nr);
  if (nr > 0) {
    logRecursive(nr - 1);
  } else {
    console.log("done with recursion");
  }
  console.log("Ended function:", nr);
 }
 logRecursive(3);
 function getRecursive(nr) {
  console.log(nr);
  if (nr > 0) {
    getRecursive(--nr);
  }
 }
 getRecursive(3);
 function calcFactorial(nr) {
  if (nr === 0) {
    return 1;
  } else {
    return nr * calcFactorial(--nr);
  }
 }
@@ -0,0 +1,72 @@
 function testAvailability(x) {
  console.log("Available here:", x);
 }
 testAvailability("Hi!");
 console.log("Not available here:", x);
 function testAvailability() {
  let y = "Local variable!";
  console.log("Available here:", y);
 }
 testAvailability();
 console.log("Not available here:", y);
 function testAvailability() {
  let y = "I'll return";
  console.log("Available here:", y);
  return y;
 }
 let z = testAvailability();
 console.log("Outside the function:", z);
 console.log("Not available here:", y);
 let globalVar = "Accessible everywhere!";
 console.log("Outside function:", globalVar);
 function creatingNewScope(x) {
  console.log("Access to global variables from inside functions.", globalVar);
 }
 creatingNewScope("some parameter");
 console.log("Still available:", globalVar);
 function doingStuff() {
  if (true) {
    var x = "local";
  }
  console.log(x);
 }
 doingStuff();
 function doingStuff() {
  if (true) {
    let x = "local";
  }
  console.log(x);
 }
 doingStuff();
 let x = "global";
 function doingStuff() {
  let x = "local";
  console.log(x);
 }
 doingStuff();
 var x = "global";
 function confuseReader() {
  x = "Guess my scope...";
  console.log("Inside the function:", x);
 }
 confuseReader();
 console.log("Outside of function:", x);
@@ -1,220 +0,0 @@
 function hiThere() {
  let you = prompt("What's your name? ");
  console.log("Hello", you, "!");
 }
 hiThere();
 console.log("this is an argument");
 prompt("argument here too");
 let arr = [];
 arr.push("argument");
 function addTwoNumbers(x, y) {
  console.log(x + y);
 }
 addTwoNumbers(3, 4);
 addTwoNumbers(12, -90);
 function myFunc(param1, param2) {
  // code of the function;
 }
 myFunc("arg1", "arg2");
 function addTwoNumbers(x = 2, y = 3) {
  console.log(x + y);
 }
 addTwoNumbers();
 addTwoNumbers(6, 6);
 addTwoNumbers(10);
 let favoriteSubject = prompt("What is your favorite subject?");
 let result = addTwoNumbers(4, 5);
 console.log(result);
 function addTwoNumbers(x, y) {
  return x + y;
 }
 let results = [];
 for (let i = 0; i < 10; i++) {
  let result = addTwoNumbers(i, 2 * i);
  results.push(result);
 }
 console.log(results);
 function testAvailability(x) {
  console.log("Available here:", x);
 }
 testAvailability("Hi!");
 console.log("Not available here:", x);
 function testAvailability() {
  let y = "Local variable!";
  console.log("Available here:", y);
 }
 testAvailability();
 console.log("Not available here:", y);
 function testAvailability() {
  let y = "I'll return";
  console.log("Available here:", y);
  return y;
 }
 let z = testAvailability();
 console.log("Outside the function:", z);
 console.log("Not available here:", y);
 let globalVar = "Accessible everywhere!";
 console.log("Outside function:", globalVar);
 function creatingNewScope(x) {
  console.log("Access to global variables from inside functions.", globalVar);
 }
 creatingNewScope("some parameter");
 console.log("Still available:", globalVar);
 function doingStuff() {
  if (true) {
    var x = "local";
  }
  console.log(x);
 }
 doingStuff();
 function doingStuff() {
  if (true) {
    let x = "local";
  }
  console.log(x);
 }
 doingStuff();
 let x = "global";
 function doingStuff() {
  let x = "local";
  console.log(x);
 }
 doingStuff();
 var x = "global";
 function confuseReader() {
  x = "Guess my scope...";
  console.log("Inside the function:", x);
 }
 confuseReader();
 console.log("Outside of function:", x);
 function getRecursive(nr) {
  console.log(nr);
  getRecursive(--nr);
 }
 getRecursive(3);
 function logRecursive(nr) {
  console.log("Started function:", nr);
  if (nr > 0) {
    logRecursive(nr - 1);
  } else {
    console.log("done with recursion");
  }
  console.log("Ended function:", nr);
 }
 logRecursive(3);
 function getRecursive(nr) {
  console.log(nr);
  if (nr > 0) {
    getRecursive(--nr);
  }
 }
 getRecursive(3);
 function calcFactorial(nr) {
  if (nr === 0) {
    return 1;
  } else {
    return nr * calcFactorial(--nr);
  }
 }
 function doingStuffAnonymously() {
  console.log("Not so secret though.");
 }
 let functionVariable = function () {
  console.log("Not so secret though.");
 };
 functionVariable();
 function doFlexibleStuff(executeStuff) {
  executeStuff();
  console.log("Inside doFlexibleStuffFunction.");
 }
 doFlexibleStuff(functionVariable);
 let anotherFunctionVariable = function () {
  console.log("Another anonymous function implementation.");
 };
 doFlexibleStuff(anotherFunctionVariable);
 function doOuterFunctionStuff(nr) {
  console.log("Outer function");
  doInnerFunctionStuff(nr);
  function doInnerFunctionStuff(x) {
    console.log(x + 7);
    console.log("I can access outer variables:", nr);
  }
 }
 doOuterFunctionStuff(2);
 function doOuterFunctionStuff(nr) {
  doInnerFunctionStuff(nr);
  function doInnerFunctionStuff(x) {
    let z = 10;
  }
  console.log("Not accessible:", z);
 }
 doOuterFunctionStuff(2);
 function doOuterFunctionStuff(nr) {
  doInnerFunctionStuff(nr);
  function doInnerFunctionStuff(x) {
    let z = 10;
  }
 }
 doInnerFunctionStuff(3);
 let youGotThis = function () {
  console.log("You're doing really well, keep coding!");
 };
 setTimeout(youGotThis, 1000);
 setInterval(youGotThis, 1000);
@@ -0,0 +1,41 @@
 let arr = ["grapefruit", 4, "hello", 5.6, true];
 function printStuff(element, index) {
    console.log("Printing stuff:", element, "on array position:", index);
 }
 let arr = ["squirrel", 5, "Tjed", new Date(), true];
 function checkString(element, index) {
 return typeof element === "string";
 }
 let filterArr = arr.filter(checkString);
 console.log(filterArr);
 console.log(arr.every(checkString));
 arr = ["grapefruit", 4, "hello", 5.6, true];
 arr.copyWithin(0, 3, 4);
 arr = ["grapefruit", 4, "hello", 5.6, true];
 arr.copyWithin(0, 3, 5);
 let arr = ["grapefruit", 4, "hello", 5.6, true, false];
 arr.copyWithin(0, 3);
 console.log(arr);
 let arr = [1, 2, 3, 4];
 let mapped_arr = arr.map(x => x + 1);
 console.log(mapped_arr);
 let bb = ["so", "bye", "bye", "love"];
 console.log(bb.lastIndexOf("bye"));
 let bb = ["so", "bye", "bye", "love"];
 console.log(bb.lastIndexOf("hi"));
 let letters = ["a", "b", "c"];
 let x = letters.join();
 console.log(x);
 let letters = ["a", "b", "c"];
 let x = letters.join('-');
 console.log(x);
@@ -0,0 +1,50 @@
 let currentDateTime = new Date();
 console.log(currentDateTime);
 let now2 = Date.now();
 console.log(now2);
 let milliDate = new Date(1000);
 console.log(milliDate);
 let stringDate = new Date("Sat Jun 05 2021 12:40:12 GMT+0200");
 console.log(stringDate);
 let specificDate = new Date(2022, 1, 10, 12, 10, 15, 100);
 console.log(specificDate);
 let d = new Date();
 console.log("Day of week:", d.getDay());
 console.log("Day of month:", d.getDate());
 console.log("Month:", d.getMonth());
 console.log("Year:", d.getFullYear());
 console.log("Seconds:", d.getSeconds());
 console.log("Milliseconds:", d.getMilliseconds());
 console.log("Time:", d.getTime());
 d.setFullYear(2010);
 console.log(d);
 d.setMonth(9);
 console.log(d);
 d.setDate(10);
 console.log(d);
 d.setHours(10);
 console.log(d);
 d.setTime(1622889770682);
 console.log(d);
 let d1 = Date.parse("June 5, 2021");
 console.log(d1);
 let d2 = Date.parse("6/5/2021");
 console.log(d2);
 console.log(d.toDateString());
 console.log(d.toLocaleDateString());
@@ -0,0 +1,12 @@
 let uri = "https://www.example.com/submit?name=maaike van putten";
 let encoded_uri = encodeURI(uri);
 console.log("Encoded:", encoded_uri);
 let decoded_uri = decodeURI(encoded_uri);
 console.log("Decoded:", decoded_uri);
 let uri = "https://www.example.com/submit?name=maaike van putten";
 let encoded_uri = encodeURIComponent(uri);
 console.log("Encoded:", encoded_uri);
 let decoded_uri = decodeURIComponent(encoded_uri);
 console.log("Decoded:", decoded_uri);
@@ -0,0 +1,12 @@
 <html>
 <body>
    <input onchange="go(this)"></input>
    <script>
        function go(e) {
            eval(e.value);
        }
    </script>
 </body>
 </html>
@@ -0,0 +1,7 @@
 let s = "Hello";
 console.log(
    s.concat(" there!")
        .toUpperCase()
        .replace("THERE", "you")
        .concat(" You're amazing!")
 );
@@ -0,0 +1,3 @@
 let x = 7;
 console.log(Number.isNaN(x));
 console.log(isNaN(x));
@@ -0,0 +1,43 @@
 let highest = Math.max(2, 56, 12, 1, 233, 4);
 console.log(highest);
 let lowest = Math.min(2, 56, 12, 1, 233, 4);
 console.log(lowest);
 let highestOfWords = Math.max("hi", 3, "bye");
 console.log(highestOfWords);
 let result = Math.sqrt(64);
 console.log(result);
 let result2 = Math.pow(5, 3);
 console.log(result2);
 let x = 6.78;
 let y = 5.34;
 console.log("X:", x, "becomes", Math.round(x));
 console.log("Y:", y, "becomes", Math.round(y));
 console.log("X:", x, "becomes", Math.ceil(x));
 console.log("Y:", y, "becomes", Math.ceil(y));
 let negativeX = -x;
 let negativeY = -y;
 console.log("negativeX:", negativeX, "becomes", Math.ceil(negativeX));
 console.log("negativeY:", negativeY, "becomes", Math.ceil(negativeY));
 console.log("X:", x, "becomes", Math.floor(x));
 console.log("Y:", y, "becomes", Math.floor(y));
 console.log("negativeX:", negativeX, "becomes", Math.floor(negativeX));
 console.log("negativeY:", negativeY, "becomes", Math.floor(negativeY));
 console.log("X:", x, "becomes", Math.trunc(x));
 console.log("Y:", y, "becomes", Math.trunc(y));
 let x = 2;
 let exp = Math.exp(x);
 console.log("Exp:", exp);
 let log = Math.log(exp);
 console.log("Log:", log);
@@ -0,0 +1,36 @@
 let x = 34;
 console.log(isNaN(x));
 console.log(!isNaN(x));
 let str = "hi";
 console.log(isNaN(str));
 let str1 = "5";
 console.log(isNaN(str1));
 let x = 3;
 let str = "finite";
 console.log(isFinite(x));
 console.log(isFinite(str));
 console.log(isFinite(Infinity));
 console.log(isFinite(10 / 0));
 let x = 3;
 let str = "integer";
 console.log(Number.isInteger(x));
 console.log(Number.isInteger(str));
 console.log(Number.isInteger(Infinity));
 console.log(Number.isInteger(2.4));
 let x = 1.23456;
 let newX = x.toFixed(2);
 let x = 1.23456;
 let newX = x.toFixed(3);
 console.log(x, newX);
 let x = 1.23456;
 let newX = x.toPrecision(2);
 let x = 1.23456;
 let newX = x.toPrecision(4);
 console.log(newX)
@@ -0,0 +1,36 @@
 let str_int = "6";
 let int_int = parseInt(str_int);
 console.log("Type of ", int_int, "is", typeof int_int);
 let str_float = "7.6";
 let int_float = parseInt(str_float);
 console.log("Type of", int_float, "is", typeof int_float);
 let str_binary = "0b101";
 let int_binary = parseInt(str_binary);
 console.log("Type of", int_binary, "is", typeof int_binary);
 let str_nan = "hello!";
 let int_nan = parseInt(str_nan);
 console.log("Type of", int_nan, "is", typeof int_nan);
 let str_float = "7.6";
 let float_float = parseFloat(str_float);
 console.log("Type of", float_float, "is", typeof float_float);
 let str_version_nr = "2.3.4";
 let float_version_nr = parseFloat(str_version_nr);
 console.log("Type of", float_version_nr, "is", typeof float_version_nr);
 let str_int = "6";
 let float_int = parseFloat(str_int);
 console.log("Type of", float_int, "is", typeof float_int);
 let str_binary = "0b101";
 let float_binary = parseFloat(str_binary);
 console.log("Type of", float_binary, "is", typeof float_binary);
 let str_nan = "hello!";
 let float_nan = parseFloat(str_nan);
 console.log("Type of", float_nan, "is", typeof float_nan);
@@ -0,0 +1,95 @@
 let s1 = "Hello ";
 let s2 = "JavaScript";
 let result = s1.concat(s2);
 console.log(result);
 let result = "Hello JavaScript";
 let arr_result = result.split(" ");
 console.log(arr_result);
 let favoriteFruits = "strawberry,watermelon,grapefruit";
 let arr_fruits = favoriteFruits.split(",");
 console.log(arr_fruits);
 let letters = ["a", "b", "c"];
 let x = letters.join();
 console.log(x);
 let letters = ["a", "b", "c"];
 let x = letters.join('-');
 console.log(x);
 let poem = "Roses are red, violets are blue, if I can do JS, then you can too!";
 let index_re = poem.indexOf("re");
 console.log(index_re);
 let indexNotFound = poem.indexOf("python");
 console.log(indexNotFound);
 if (poem.indexOf("python") != -1) {
    // do stuff
 }
 let searchStr = "When I see my fellow, I say hello";
 let pos = searchStr.search("lo");
 console.log(pos);
 let notFound = searchStr.search("JavaScript");
 console.log(notFound);
 let lastIndex_re = poem.lastIndexOf("re");
 console.log(lastIndex_re);
 let pos1 = poem.charAt(10);
 console.log(pos1);
 let pos2 = poem.charAt(1000);
 console.log(pos2);
 let str = "Create a substring";
 let substr1 = str.slice(5);
 let substr2 = str.slice(0,3);
 console.log("1:", substr1);
 console.log("2:", substr2);
 let hi = "Hi buddy";
 let new_hi = hi.replace("buddy", "Pascal");
 console.log(new_hi);
 let new_hi2 = hi.replace("not there", "never there");
 console.log(new_hi2);
 let s3 = "hello hello";
 let new_s3 = s3.replace("hello", "oh");
 console.log(new_s3);
 let s3 = "hello hello";
 let new_s3 = s3.replaceAll("hello", "oh");
 console.log(new_s3);
 let low_bye = "bye!";
 let up_bye = low_bye.toUpperCase();
 console.log(up_bye);
 let caps = "HI HOW ARE YOU?";
 let fixed_caps = caps.toLowerCase();
 console.log(fixed_caps);
 let caps = "HI HOW ARE YOU?";
 let fixed_caps = caps.toLowerCase();
 let first_capital = fixed_caps.charAt(0).toUpperCase().concat(fixed_caps.slice(1));
 console.log(first_capital);
 let encouragement = "You are doing great, keep up the good work!";
 let bool_start = encouragement.startsWith("You");
 console.log(bool_start);
 let bool_start2 = encouragement.startsWith("you");
 console.log(bool_start2);
 let bool_start3 = encouragement.toLowerCase().startsWith("you");
 console.log(bool_start3);
 let bool_end = encouragement.endsWith("Something else");
 console.log(bool_end);