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upload homework week3 javascript 02
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‎Week2/homework/maartjes_work.js

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Original file line numberDiff line numberDiff line change
@@ -70,6 +70,6 @@ console.log("SEK " + kronor);
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//if currency was in EURO:
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let euro = Number(12250).toLocaleString("en-EUR", {minimumFractionDigits: 2});
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console.log("€ " + euro);
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console.log("Maartjes should earn €" + euro);
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‎Week2/homework/shop_list.js

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/*Assignment: Your friend Gudrun owns a "livs" kiosk. She needs help avoiding food waste and financial loss.
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Write a Javascript function which, given a list of items sorts them by 1) best before date (ascending) and 2) price (descending).
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In other words, the item with the earliest best before date first, and in the case of same date, higher price first.
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If items have bot equal best before date and price,their order does not matter.
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The input list is given as a text string, in a JSON format demonstrated by this example:*/
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let livs_kiosk = '[ {"product": "Milk, 1L carton", "best_before": "2018-10-04", "price": 15.5 }, {"product": "Milk, 1L carton", "best_before": "2018-10-04", "price": 15.5},{ "product": "Eggs 12pcs","best_before": "2018-10-04","price": 35.0}, {"product": "Swedish meatballs", "best_before": "2018-10-25", "price": 22.0 }]'
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/*The function should return a text string containing the sorted list, in the same format as the input.
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You can assume that the input is always valid and in the same format, and its length isn't more than a few hundreds items.
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Only "vanilla" Javascript is allowed, ie. no external libraries.*/
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let Obj = JSON.parse(livs_kiosk);
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/*console.log(Obj);
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const bestBefore = Obj.filter(Obj.best_before);
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console.log(bestBefore);*/
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let sortedObj = Obj.sort(function(pr1, pr2) {
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let a = new Date (pr1.best_before)
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let b = new Date (pr1.best_before)
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if (a>b){return -1};
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if (a<b){return 1};
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let c = new Date (pr2.price)
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let d = new Date (pr2.price)
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if (c>d){return -1};
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if (c<d){return 1};
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});
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console.log(sortedObj);
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‎Week3/homework/1-step3.js

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@@ -1,11 +1,13 @@
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'use strict';
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function foo(func) {
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// What to do here?
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// What to do here?
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return func();
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}
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function bar() {
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console.log('Hello, I am bar!');
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}
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foo(bar);
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‎Week3/homework/2-step3.js

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@@ -1,8 +1,31 @@
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'use strict';
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function threeFive(startIndex, stopIndex, threeCallback, fiveCallback) {
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const values = [];
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// Add your code here
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for (var i = startIndex; i <= stopIndex; i++){
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values.push(i)
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}
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console.log(values);
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for (let j = 0; j < values.length; j++){
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if (j % 3 === 0) {
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threeCallback("3");
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}
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else if (j % 5 === 0) {
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fiveCallback("5");
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}
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else if ((j % 3=== 0) && (j % 5 === 0)) {
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fiveCallback("5") && threeCallback("3");
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}
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}
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}
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function sayThree(threeCallback) {
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console.log(threeCallback);
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}
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function sayFive(fiveCallback) {
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console.log(fiveCallback);
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}
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threeFive(10, 15, sayThree, sayFive);
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threeFive(10, 15, sayThree, sayFive)

‎Week3/homework/3-step3.js

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@@ -1,25 +1,44 @@
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'use strict';
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// use a 'for' loop
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function repeatStringNumTimesWithFor(str, num) {
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// add your code here
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return str;
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function repeatStringNumTimes(str, num) {
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// repeat after me
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let repeatString = "";
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for (; num > 0;) {
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repeatString += str;
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num--;
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}
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return repeatString;
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}
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console.log('for', repeatStringNumTimesWithFor('abc', 3));
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// use a 'while' loop
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function repeatStringNumTimesWithWhile(str, num) {
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// add your code here
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return str;
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}
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function repeatStringNumTimes(str, num) {
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// repeat after me
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let repeatString = "";
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while (num > 0){
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repeatString += str;
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num--;
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}
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return repeatString;
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}
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console.log('while', repeatStringNumTimesWithWhile('abc', 3));
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// use a 'do...while' loop
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function repeatStringNumTimesWithDoWhile(str, num) {
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// add your code here
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return str;
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function repeatStringNumTimes(str, num) {
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// repeat after me
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let repeatString = "";
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do {
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repeatString += str;
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num--;
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} while (num > 0);
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if (num < 0){
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return "";
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}
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return repeatString;
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}
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console.log('while', repeatStringNumTimesWithDoWhile('abc', 3));

‎Week3/homework/4-step3.js

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@@ -1,2 +1,18 @@
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'use strict';
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// paste your freeCodeCamp solutions in here
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//Object Oriented Programming: Define a Constructor Function
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function Dog(){
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this.name = "Bob";
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this.color = "red";
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this.numLegs = 4;
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}
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//Object Oriented Programming: Use a Constructor to Create Objects
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function Dog() {
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this.name = "Rupert";
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this.color = "brown";
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this.numLegs = 4;
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}
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// Add your code below this line
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let hound = new Dog();

‎Week3/homework/5-step3.js

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@@ -1,2 +1,20 @@
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'use strict';
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// paste your freeCodeCamp solutions in here
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function multiplyAll(arr) {
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var product = 1;
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// Only change code below this line
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for (var i = 0; i < arr.length; i++){
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for (var j=0; j < arr[i].length; j++){
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console.log([j]);
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product = product * arr[i][j];
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}
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}
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// Only change code above this line
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return product;
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}
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// Modify values below to test your code
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multiplyAll([[1,2],[3,4],[5,6,7]]);
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‎Week3/homework/6-step3.js

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@@ -4,3 +4,17 @@ const arr2d = [[1, 2], [3, 4], [5, 6]];
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const arr3d = [[[1, 2], [3, 4]], [[5, 6], [7, 8]]];
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// add your solution here, or add a comment on how you would tackle this problem
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for (let i = 0; i < arr2d.length; i++) {
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for (let z = 0; z < arr2d[i].length; z++) {
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console.log(arr2d[i][z]);
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}
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}
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for (let i = 0; i < arr3d.length; i++) {
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for (let z = 0; z < arr3d[i].length; z++){
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for (let j = 0; j < arr3d[i].length; j++){
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console.log(arr3d[i][z][j]);
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}
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}
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}

‎Week3/homework/7-step3.js

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Original file line numberDiff line numberDiff line change
@@ -4,6 +4,7 @@ const x = 9;
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function f1(val) {
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val = val + 1;
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return val;
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}
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f1(x);
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console.log(y);
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// Add your explanation as a comment here
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/*
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**by value**
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The first function (f1) passes the variable by value, as all Javascript functions pass primitive data functions this way.
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however this does not explain why the value is not 10, as the function is to add 1 to the value of x.
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if you were to ask the value of x within the function, it will give you 10, however outside the function it will give you only the original value (9);
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This is because they are now two difference variables rather than being the same variable. so if you change one, it will not affect the other.
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**by reference**
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the second passes the variable by reference, as Javascript objects are always passed by reference. This means that they variables are one and the same,
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so if you affect the variable within the function it will affect the variable outside the function (as they are the same)
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*/

‎Week3/homework/step4-bonus.js

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@@ -3,8 +3,19 @@
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const values = ['a', 'b', 'c', 'd', 'a', 'e', 'f', 'c'];
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// Add your function here. Try and come up with a good name for this function
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function noDupe() {
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values.filter(function(item, pos) {
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return values.indexOf(item) == pos;
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})
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};
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function noDupe(values) {
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var seen = {};
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return values.filter(function(item) {
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return seen.hasOwnProperty(item) ? false : (seen[item] = true);
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});
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}
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// Replace `yourFunction` with the name of the function you just created
8-
const uniqueValues = yourFunction(values);
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const uniqueValues = noDupe(values);
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console.log(uniqueValues);

‎Week3/homework/step4.js

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@@ -1,7 +1,15 @@
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'use strict';
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// Add your code here
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function createBase(a){
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return function (y) {
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console.log(y + a)
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}
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}
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const addSix = createBase(6);
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addSix(10); // returns 16

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