- Trending Categories
- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- MS Excel
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP
- Physics
- Chemistry
- Biology
- Mathematics
- English
- Economics
- Psychology
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Found 8894 Articles for Front End Technology
429 Views
ProblemWe are required to write a JavaScript function that takes in a string which has integers inside it separated by spaces.The task of our function is to convert each integer in the string into an integer and return their sum.ExampleFollowing is the code − Live Democonst str = '1 5 12 76 2'; const sumStringNumbers = (str = '') => { const findSum = (arr = []) => { const sum = arr.reduce((acc, val) => acc + val); return sum; }; let sum = 0; const arr = str .split(' ') .map(Number); sum = findSum(arr); return sum; }; console.log(sumStringNumbers(str));Output96
212 Views
ProblemWe are required to write a JavaScript function that takes in a 2-Dimensional array of m X n order of numbers containing the same number of rows and columns.For this array, our function should count and return the following sum−$\sum_{i=1}^m \sum_{j=1}^n (-1)^{i+j}a_{ij}$ExampleFollowing is the code − Live Democonst arr = [ [4, 6, 3], [1, 8, 7], [2, 5, 9] ]; const alternateSum = (arr = []) => { let sum = 0; for(let i = 0; i < arr.length; i++){ for(let j = 0; j < arr[i].length; j++){ const multiplier = (i + j) % 2 === 0 ? 1 : -1; sum += (multiplier * arr[i][j]); }; }; return sum; }; console.log(alternateSum(arr));Output7
83 Views
ProblemWe are required to write a JavaScript function that takes in an array of number. Our function should return that first number from the array whose value and 0-based index are the same given that there exists at least one such number in the array.ExampleFollowing is the code − Live Democonst arr = [9, 2, 1, 3, 6, 5]; const findFirstSimilar = (arr = []) => { for(let i = 0; i < arr.length; i++){ const el = arr[i]; if(el === i){ return i; }; }; }; console.log(findFirstSimilar(arr));Output3
620 Views
ProblemWe are required to write a JavaScript function that takes in a string and encrypts it based on the following algorithm −The string contains only space separated words.We need to encrypt each word in the string using the following rules−The first letter needs to be converted to its ASCII code.The second letter needs to be switched with the last letter.Therefore, according to this, the string ‘good’ will be encrypted as ‘103doo’.ExampleFollowing is the code − Live Democonst str = 'good'; const encyptString = (str = '') => { const [first, second] = str.split(''); const last = str[str.length - 1]; ... Read More
175 Views
ProblemWe are required to write a JavaScript function that takes in a string and encrypts it based on the following algorithm −The string contains only space separated words.We need to encrypt each word in the string using the following rules −The first letter needs to be converted to its ASCII code.The second letter needs to be switched with the last letter.Therefore, according to this, the string ‘good’ will be encrypted as ‘103doo’.ExampleFollowing is the code − Live Democonst str = 'good'; const encyptString = (str = '') => { const [first, second] = str.split(''); const last = str[str.length - ... Read More
298 Views
ProblemWe are required to write a JavaScript function that takes in an array of numbers. Our function should return that first element from the array which is not the natural successor of its previous element.It means we should return that element which is not +1 its previous element given that there exists at least one such element in the array.ExampleFollowing is the code − Live Democonst arr = [1, 2, 3, 4, 6, 7, 8]; const findFirstNonConsecutive = (arr = []) => { for(let i = 0; i < arr.length - 1; i++){ const el = arr[i]; ... Read More
67 Views
ProblemWe are required to write a JavaScript function that takes in two numbers. Our function should return true if the numbers have 1 in the binary representation at the same index twice, false otherwise.ExampleFollowing is the code − Live Democonst num1 = 10; const num2 = 15; const checkBits = (num1 = 1, num2 = 1) => { let c = num1.toString(2).split(''); let d = num2.toString(2).split(''); if(c.length > d.length){ c = c.slice(c.length - d.length); }else{ d = d.slice(d.length - c.length); }; let count = 0; for(let i = ... Read More
879 Views
ProblemWe are required to write a JavaScript function that takes in a string and a number. Our function should return the truncated version of the given string up to the given limit followed by "..." if the result is shorter than the original string otherwise our function should return the same string if nothing was truncated.ExampleFollowing is the code − Live Democonst str = 'Testing String'; const num = 8; const limitString = (str = '', num = 1) => { const { length: len } = str; if(num < len){ return str.slice(0, num) + '...'; }else{ return str; }; }; console.log(limitString(str, num));OutputFollowing is the console output −Testing ...
139 Views
ProblemWe are required to write a JavaScript function that takes in an n * n matrix of string characters and an array of integers (positive and unique).Our function should construct a string of those characters whose 1-based index is present in the array of numbers.Character Matrix −[ [‘a’, ‘b’, ‘c’, d’], [‘o’, ‘f’, ‘r’, ‘g’], [‘h’, ‘i’, ‘e’, ‘j’], [‘k’, ‘l’, ‘m’, n’] ];Number Array −[1, 4, 5, 7, 11]Should return ‘adore’ because these are the characters present at the 1-based indices specified by number array in the matrix.ExampleFollowing is the code − Live Democonst arr = ... Read More
128 Views
ProblemWe are required to write a JavaScript function that takes in an integer n and returns either −an integer k if n is a square number, such that k * k == n ora range (k, k+1), such that k * k < n and n < (k+1) * (k+1).ExampleFollowing is the code − Live Democonst num = 83; const squareRootRange = (num = 1) => { const exact = Math.sqrt(num); if(exact === Math.floor(exact)){ return exact; }else{ return [Math.floor(exact), Math.ceil(exact)]; }; }; console.log(squareRootRange(num));OutputFollowing is the console output −[9, 10]