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+console.log(arrayMine); + +var n = window.prompt('Please enter first how many numbers you want to log'); +var num1 = parseInt(n); + +function nthItem(array, num1) { + var arrayX = []; + for (let i = 0; i < num1; i++) { + arrayX.push(array[i]); + } + return arrayX; +} +console.log(nthItem(arrayMine, n)); + +//a function which accepts a number as input and insert dashes btw each two even number: +function evenNumbers() { + var number = window.prompt('Please enter a number'); + const string = number.toString(); + const result = [string[0]]; + for (let i = 0; i < string.length; i++) { + if (string[i - 1] % 2 === 0 && string[i] % 2 === 0) { + result.push('-', string[i]); + } else if (string[i - 1] % 2 === 1 && string[i] % 2 === 0) { + result.push(string[i]); + } else if (string[i - 1] % 2 === 0 && string[i] % 2 === 1) { + result.push('-', string[i]); + } else if (string[i - 1] % 2 === 1 && string[i] % 2 === 1) { + result.push(string[i]); + } + } + console.log(result.join('')); +} +evenNumbers(); + +//finding the most frequent item of an array +function findMostFrequent(array) { + var map = {}; + var mostFrequentElement = array[0]; + for (var i = 0; i < array.length; i++) { + if (!map[array[i]]) { + map[array[i]] = 1; + } else { + ++map[array[i]]; + if (map[array[i]] > map[mostFrequentElement]) { + mostFrequentElement = array[i]; + console.log('The most frequent element of the array is: ' + mostFrequentElement); + } else if (map[array[i]] === map[mostFrequentElement]) { + console.log('The array has more than one most frequent elements'); + console.log( + 'The most frequent elements of the array are: ' + mostFrequentElement + ', ' + array[i], + ); + } + } + } +} + +findMostFrequent(arrayMine); + +//function accepting a string as input and swapping the case of each character +function swapCase() { + var str = window.prompt('Please enter something'); + + //first we define the alphabet and check the letters according to that + var upperCases = 'ABCÇDEFGHIİJKLMNOÖPQRSTUÜVWXYZ'; + var lowerCases = 'abcçdefghıijklmnoöpqrstuüvwxyz'; + + //we will check each letter according to upper and lower case and transform it: + var result = []; + for (var x = 0; x < str.length; x++) { + if (upperCases.indexOf(str[x]) !== -1) { + result.push(str[x].toLowerCase()); + } else if (lowerCases.indexOf(str[x]) !== -1) { + result.push(str[x].toUpperCase()); + } else { + result.push(str[x]); + } + } + console.log(result.join('')); +} +swapCase(); diff --git a/Week2/class exercise json/index.html b/Week2/class exercise json/index.html new file mode 100644 index 000000000..08fbd5ac4 --- /dev/null +++ b/Week2/class exercise json/index.html @@ -0,0 +1,15 @@ + + + + + + + Document + + + +
+ + + + diff --git a/Week2/class exercise json/index.js b/Week2/class exercise json/index.js new file mode 100644 index 000000000..e9a24dd4c --- /dev/null +++ b/Week2/class exercise json/index.js @@ -0,0 +1,76 @@ +//JS program for getting the length of an object +var myObj = {}; +myObj['full'] = 'Galatasaray'; +myObj['short'] = 'GS'; +myObj['league'] = 'Super League'; +myObj['position'] = 1; +Object.size = function(obj) { + var size = 0, + key; + for (key in obj) { + if (obj.hasOwnProperty(key)) size++; + } + return size; +}; + +var size = Object.size(myObj); +console.log('The length of the object is: ' + size); + +//js function to check if object contains given prop +var x = window.prompt('Please enter a property to check if it exist in the object'); +Object.check = function(obj, x) { + for (let key in obj) { + if (x === obj.hasOwnProperty(key)) console.log('This is a property of object'); + else console.log("This property doesn't exist in this object"); + } +}; +Object.check(myObj); + +//js program to create clock, console the seconds to html +function countTime() { + var today = new Date(); + var h = today.getHours(); + var m = today.getMinutes(); + var s = today.getSeconds(); + m = checkTime(m); + s = checkTime(s); + document.getElementById('txt').innerHTML = h + ':' + m + ':' + s; + var t = setTimeout(countTime, 500); +} +function checkTime(i) { + if (i < 10) { + i = '0' + i; + } // add zero in front of numbers < 10 + return i; +} + +//js program to create clock, console the seconds +function my_Clock() { + this.cur_date = new Date(); + this.hours = this.cur_date.getHours(); + this.minutes = this.cur_date.getMinutes(); + this.seconds = this.cur_date.getSeconds(); +} +my_Clock.prototype.run = function() { + setInterval(this.update.bind(this), 1000); +}; +my_Clock.prototype.update = function() { + this.updateTime(1); + console.log(this.hours + ':' + this.minutes + ':' + this.seconds); +}; +my_Clock.prototype.updateTime = function(secs) { + this.seconds += secs; + if (this.seconds >= 60) { + this.minutes++; + this.seconds = 0; + } + if (this.minutes >= 60) { + this.hours++; + this.minutes = 0; + } + if (this.hours >= 24) { + this.hours = 0; + } +}; +var clock = new my_Clock(); +clock.run(); diff --git a/Week2/homework/index.html b/Week2/homework/index.html new file mode 100644 index 000000000..ce6448a5a --- /dev/null +++ b/Week2/homework/index.html @@ -0,0 +1,14 @@ + + + + + + + Document + + + + + + + diff --git a/Week2/homework/maartjes-work.js b/Week2/homework/maartjes-work.js index 49772eb44..2a8441a43 100644 --- a/Week2/homework/maartjes-work.js +++ b/Week2/homework/maartjes-work.js @@ -46,8 +46,10 @@ const maartjesTasks = monday.concat(tuesday); const maartjesHourlyRate = 20; function computeEarnings(tasks, hourlyRate) { - // Replace this comment and the next line with your code - console.log(tasks, hourlyRate); + const hourTasks = tasks.map(key => key.duration / 60); //Map the tasks to durations in hours. + const filteredTasks = hourTasks.filter(dur => dur >= 2); //Filter out everything that took less than two hours (i.e., remove from the collection) + const earningTasks = filteredTasks.map(dur => (dur += dur * hourlyRate)); //Multiply the each duration by a per-hour rate for billing (use €20/hour) and sum it all up. + return earningTasks; } // eslint-disable-next-line no-unused-vars @@ -55,7 +57,7 @@ const earnings = computeEarnings(maartjesTasks, maartjesHourlyRate); // add code to convert `earnings` to a string rounded to two decimals (euro cents) -console.log(`Maartje has earned €${'replace this string with the earnings rounded to euro cents'}`); +console.log(`Maartje has earned €${Number.parseFloat(earnings).toFixed(2)}`); //Output a formatted Euro amount, rounded to Euro cents, e.g: €11.34. // Do not change or remove anything below this line module.exports = { diff --git a/Week2/homework/map-filter.js b/Week2/homework/map-filter.js index c8e8a88c1..3f7ef2d69 100644 --- a/Week2/homework/map-filter.js +++ b/Week2/homework/map-filter.js @@ -1,12 +1,11 @@ 'use strict'; function doubleOddNumbers(numbers) { - // Replace this comment and the next line with your code - console.log(numbers); + return numbers.filter(numb => numb % 2 === 1).map(numb => numb * 2); } -const myNumbers = [1, 2, 3, 4]; -console.log(doubleOddNumbers(myNumbers)); +const myNumbers = [1, 2, 3, 4, 5, 6]; +console.log(doubleOddNumbers(myNumbers)); // ==> [2, 6, 10] // Do not change or remove anything below this line module.exports = {