Web Development Articles - Page 254 of 1049

ProblemWe have an amount of money amt > 0 and we deposit it with an interest rate of p percent divided by 360 per day on the 1st of January 2021. We want to have an amount total >= a0.Our function should take these three parameters and return the date at which the amount will be equal to the desired amountExampleFollowing is the code − Live Democonst principal = 100; const amount = 150; const interest = 2; const findDate = (principal, amount, interest) => {    const startingDate = new Date('2021-01-01')    const dailyInterestRate = interest / 36000    let ... Read More

ProblemWe are required to write a JavaScript function that takes in a matrix of N * N order. The walls in the matrix are marked by ‘W’ and empty positions are marked by ‘_’We can move in any of the four directions at any point. Our function should return true if we can reach to the end [N - 1, N - 1], false otherwise.ExampleFollowing is the code − Live Democonst maze = [    ['_', 'W', 'W', 'W'],    ['_', 'W', 'W', 'W'],    ['W', '_', '_', 'W'],    ['W', 'W', 'W', '_'] ]; const canFindPath = (m = []) ... Read More

ProblemWe are required to write a JavaScript function that takes in the length, height and width of a room.Our function should calculate the number of sheets required to cover the whole room given that the width of one single sheet is .52 units and length is 10 units.For the sake of convenience, we should return the number of rolls such that the length is 15% more than the required length.ExampleFollowing is the code − Live Democonst findSheet = (length, width, height) => {    if(length === 0 || width === 0){       return 0;    }    const roomArea ... Read More

ProblemWe are required to write a JavaScript function that takes in an integer n (n >= 0) and a digit d (0

ProblemWe are required to write a JavaScript function that takes in an expression in the form (ax+b)^n where a and b are integers which may be positive or negative, x is any single character variable, and n is a natural number. If a = 1, no coefficient will be placed in front of the variable.Our function should return the expanded form as a string in the form ax^b+cx^d+ex^f... where a, c, and e are the coefficients of the term, x is the original one-character variable that was passed in the original expression and b, d, and f, are the powers ... Read More

ProblemWe are required to write a JavaScript function that takes in a positive integer n and returns the maximum number we got doing only left rotations to the digits of the number.ExampleFollowing is the code − Live Democonst num = 56789; const findMaximum = (num = 1) => {    let splitNumbers = num.toString().split("");    let largestNumber = num;    for(let i = 0; i < splitNumbers.length - 1; i++) {       splitNumbers.push(splitNumbers.splice(i, 1)[0]);       let newNumber = Number(splitNumbers.join(""));       if(newNumber >= largestNumber) {          largestNumber = newNumber;       }    };    return largestNumber; }; console.log(findMaximum(num));Output68957

Problem Suppose there are 5 squares embedded inside a rectangle like this −Their perimeter will be −4 + 4 + 8 + 12 + 20 = 48 unitsWe are required to write a JavaScript function that takes in a number n and return the sum of the perimeter if there are n squares embedded.ExampleFollowing is the code − Live Democonst num = 6; const findPerimeter = (num = 1) => {    const arr = [1,1];    let n = 0;    let sum = 2;    for(let i = 0 ; i < num-1 ; i++){       n = arr[i] + arr[i+1];       arr.push(n);       sum += n;    };    return sum * 4; }; console.log(findPerimeter(num - 1));Output80

ProblemWe are required to write a JavaScript function that takes in a string of English alphabets. Our function should push every alphabet forward by 10 places. And if it goes past 'z', we should start again at 'a'.ExampleFollowing is the code − Live Democonst str = 'sample string'; const moveStrBy = (num = 10) => {    return str => {       const calcStr = (ch, code) => String       .fromCharCode(code + (ch.charCodeAt(0) - code + num) % 26);       const ACode = 'A'.charCodeAt(0);       const aCode = 'a'.charCodeAt(0);       return str.replace(/[a-z]/gi, ch => (          ch.toLowerCase() == ch          ? calcStr(ch, aCode)          : calcStr(ch, ACode)       ));    }; }; const moveByTen = moveStrBy(); console.log(moveByTen(str));Outputckwzvo cdbsxq

ProblemWe are required to write a JavaScript function that takes in an array of numbers. Our function should return a string made of four parts −a four character 'word', made up of the characters derived from the first two and last two numbers in the array. order should be as read left to right (first, second, second last, last), the same as above, post sorting the array into ascending order, the same as above, post sorting the array into descending order, the same as above, post converting the array into ASCII characters and sorting alphabetically.The four parts should form a ... Read More

ProblemWe are required to write a JavaScript function that takes in a string of English alphabets. Our function should construct a new string and every consonant should be pushed forward 9 places through the alphabet. If they pass 'z', start again at 'a'. And every vowel should be pushed by 5 places.ExampleFollowing is the code − Live Democonst str = 'sample string'; const moveWords = (str = '') => {    str = str.toLowerCase();    const legend = 'abcdefghijklmnopqrstuvwxyz';    const isVowel = char => 'aeiou'.includes(char);    const isAlpha = char => legend.includes(char);    let res = '';    for(let i ... Read More