catsAndIvy
2 years ago
parent
baf55ebf99
commit
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<!DOCTYPE html>
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<html>
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<head>
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<title>30DaysOfScript:Internal Script</title>
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<script src="introduction.js"></script>
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</head>
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<body></body>
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</html>
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console.log('Welcome to 30DaysOfJavaScript')
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const webTechs = [
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'HTML',
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'CSS',
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'JavaScript',
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'React',
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'Redux',
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'Node',
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'MongoDB',
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]
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module.exports = webTechs
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const countries = [
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'Albania',
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'Bolivia',
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'Canada',
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'Denmark',
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'Ethiopia',
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'Finland',
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'Germany',
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'Hungary',
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'Ireland',
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'Japan',
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'Kenya',
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]
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module.exports = countries
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// Exercise 1 - Level 1
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const webTechs = [
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'HTML',
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'CSS',
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'JavaScript',
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'React',
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'Redux',
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'Node',
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'MongoDB',
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]
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const newArray = Array(6).fill('cats');
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newArray.push(7)
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const itCompanies = Array('Facebook', 'Google', 'Microsoft', 'Apple', 'IBM', 'Oracle', 'Amazon')
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for (let i = 0; i<itCompanies.length; i++) {
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return (itCompanies[i].toLowerCase())
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}
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const store = itCompanies.pop()
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const string = itCompanies.join(', ')
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const sentence = string + " and " + store + " are big IT Companies."
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// return sentence
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for (let i = 0; i < itCompanies.length; i++) {
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let index = itCompanies.indexOf(itCompanies[i])
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index != -1
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? console.log('This company does exist in the array')
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: console.log('This company does not exist in the array')
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}
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for (let i = 0; i < itCompanies.length; i++) {
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if (itCompanies[i].includes('o')) {
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let matcher = itCompanies[i].match(/o/g).length
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if (matcher > 1) {
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return itCompanies[i]
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}
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}
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}
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const sliced = itCompanies.slice(itCompanies.length-3, itCompanies.length)
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const middle = itCompanies[Math.floor((itCompanies.length)/2)]
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const middleIndex = Math.floor((itCompanies.length)/2)
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itCompanies.splice(middleIndex,1)
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itCompanies.length = 0
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// Exercise 1 - Level 2
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const countries = require('./countries.js');
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const webTechs = require('./ web_techs.js');
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const str = countries.toString()
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const modifiedStr = str.replace(/[^\w]/g, ' ')
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const newArray = modifiedStr.split(' ')
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const numOfWords = newArray.length
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const shoppingCart = ['Milk', 'Coffee', 'Tea', 'Honey']
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if (!shoppingCart.includes('Meat')) {
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shoppingCart.unshift('Meat')
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}
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if (!shoppingCart.includes('Sugar')) {
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shoppingCart.push('Sugar')
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}
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shoppingCart[3] = 'Green Tea'
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if (!countries.includes('Ethiopia')) {
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countries.push('Ethiopia')
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} else {
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console.log('Ethiopia')
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}
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if (!webTechs.includes('Sass')) {
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webTechs.push('Sass')
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console.log(webTechs)
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} else {
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console.log('Sass is a CSS preprocess')
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}
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const frontEnd = ['HTML', 'CSS', 'JS', 'React', 'Redux']
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const backEnd = ['Node', 'Express', 'MongoDB']
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const fullStack = frontEnd.concat(backEnd)
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// Exercise 1 - Level 3
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const countries = require('./countries.js');
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const ages = [19, 22, 19, 24, 20, 25, 26, 24, 25, 24]
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const sortedArray = ages.sort()
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const minAge = sortedArray[0]
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const maxAge = sortedArray[sortedArray.length-1]
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const medianAge = (sortedArray[4] + sortedArray[5])/2
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const averageAge = (sortedArray.reduce((number, a) => number + a, 0))/sortedArray.length
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const rangeAge = maxAge - minAge
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const compareAge = (maxAge - averageAge)-(minAge - averageAge)
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const slicedCountries = countries.slice(0,10)
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const middleCountry = countries[5]
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const firstHalf = countries.slice(0,6)
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const secondHalf = countries.slice(6,11)
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// Exercise 2 - Level 1
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let age = 34
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if (age <18) {
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let years = 18 - age
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console.log(`You have ${years} years left until you can drive.`)
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} else {
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console.log(`You are old enough to drive.`)
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}
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if (age > 29) {
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let years = age - 29
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console.log(`You are ${years} years older than me.`)
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} else if (age === 29) {
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console.log(`You are the same age as me.`)
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} else {
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let years = 29 - age
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console.log(`I am ${years} years older than you.`)
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}
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let a = 2
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let b = 2
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if (a > b) {
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console.log(`${a} is greater than ${b}`)
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} else if (a === b) {
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console.log(`${a} is equal to ${b}`)
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} else {
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console.log(`${b} is greater than ${a}`)
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}
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let number = 10
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if (number%2 === 0) {
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console.log(`${number} is even.`)
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} else {
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console.log(`${number} is odd.`)
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}
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// Exercise 2 - Level 2
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let score = 75;
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if (score >= 90 && score <= 100) {
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console.log('A');
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} else if (score >= 70 && score < 90) {
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console.log('B');
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} else if (score >= 60 && score < 70) {
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console.log('C');
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} else if (score >= 50 && score < 60) {
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console.log('D');
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} else if (score >= 0 && score < 50) {
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console.log('E');
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} else {
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console.log('Invalid score');
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}
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let month = 'September'
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if (month === 'September' || month === 'October' || month === 'November') {
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console.log('The season is Autumn')
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} else if (month === 'December' || month === 'January' || month === 'February') {
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console.log('The season is Winter')
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} else if (month === 'March' || month === 'April' || month === 'May') {
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console.log('The season is Spring')
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} else if (month === 'June' || month === 'July' || month === 'August') {
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console.log('The season is Summer') }
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let day = 'FriDAY'
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let lowered = day.toLowerCase()
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switch(lowered){
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case 'saturday':
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console.log('Saturday is a weekend')
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break
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case 'sunday':
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console.log('Sunday is a weekend.')
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break
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default:
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const capital = lowered.slice(0,1).toUpperCase()
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const capitalised = capital + lowered.slice(1)
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console.log(`${capitalised} is a week day.`)
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}
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// Exercise 2 - Level 3
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const currentDate = new Date();
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const currentYear = currentDate.getFullYear();
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let month = 'February'
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if (month === 'April' || month === 'June' || month === 'September'|| month === 'November') {
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console.log(`${month} has 30 days.`)
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} else if (month === 'February' && currentYear%4 === 0) {
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console.log(`February has 29 days.`)
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} else if (month === 'February' && !currentYear%4 === 0) {
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console.log(`February has 28 days.`)
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} else {console.log(`${month} has 31 days.`)}
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