We are required to write a JavaScript function that takes in string and returns an array with two string values, and they should be the smallest and largest words respectively from the string.For example −If the string is −const str = "Hardships often prepare ordinary people for an extraordinary destiny";Then the output should be −const output = ["an", "extraordinary"];So, let's write the code for this functionExampleFollowing is the code −const str = "Hardships often prepare ordinary people for an extraordinary destiny"; const largestSmallest = str => {    const strArr = str.split(" ");    let min = strArr[0];    let ... Read More

We are given the lengths of three sides of a triangle and we are required to write a function that returns the area of the triangle using the length of its sides.Heron's formulaWe can calculate the area of a triangle if we know the lengths of all three sides, using Heron's formula −Step 1 − Calculate "s" (half of the triangles perimeter) −s = (a+b+c) / 2Step 2 − Then calculate the Area using Herons formula −A = sqrt( s(s-a)(s-b)(s-c) )ExampleSo, Let’s write the code for this function −const sides = [12, 4, 9]; const areaOfTriangle = sides => { ... Read More

We are required to write a JavaScript function that takes in a number and returns a number that can be represented as a power of 2 which is nearest to the input number.For example −If the input number if 365, then the output should be 256, because 256 is the nearest such number to 365 which can be represented as 2^n for some whole number value of n.ExampleLet’s write the code for this function −const num = 365; const nearestPowerOfTwo = num => {    // dealing only with non-negative numbers    if(num < 0){       num *= ... Read More

We are required to write a JavaScript function that takes in three numbers (representing the coefficient of quadratic term, coefficient of linear term and the constant respectively in a quadratic quadratic).And we are required to find the roots, (if they are real roots) otherwise we have to return false. Let's write the code for this functionExampleFollowing is the code −const coefficients = [3, 12, 2]; const findRoots = co => {    const [a, b, c] = co;    const discriminant = (b * b) - 4 * a * c;    if(discriminant < 0){       // the ... Read More

We are required to write a JavaScript function that takes in a string and returns a new string with only the words that appeared for more than once in the original string.For example: If the input string is −const str = "big black bug bit a big black dog on his big black nose";Then the output should be −const output = "big black";ExampleLet’s write the code for this function −const str = "big black bug bit a big black dog on his big black nose"; const findDuplicateWords = str => {    const strArr = str.split(" ");    const res ... Read More

We are required to write a JavaScript function that takes in two 2-D arrays of numbers and returns their matrix multiplication result.Let’s say the following are our two matrices −// 5 x 4 let a = [    [1, 2, 3, 1],    [4, 5, 6, 1],    [7, 8, 9, 1],    [1, 1, 1, 1],    [5, 7, 2, 6] ]; // 4 x 6 let b = [    [1, 4, 7, 3, 4, 6],    [2, 5, 8, 7, 3, 2],    [3, 6, 9, 6, 7, 8],    [1, 1, 1, 2, 3, 6] ];ExampleLet’s ... Read More

We are required to write a JavaScript function that takes in a string and constructs a new string with all the uppercase characters converted to lowercase and all the lowercase characters converted to uppercase.Let’s write the code for this function −ExampleFollowing is the code −const str = 'The Case OF tHis StrinG Will Be FLiPped'; const isUpperCase = char => char.charCodeAt(0) >= 65 && char.charCodeAt(0) char.charCodeAt(0) >= 97 && char.charCodeAt(0) {    let newStr = '';    const margin = 32;    for(let i = 0; i < str.length; i++){       const curr = str[i];   ... Read More

We are required to write a JavaScript function that takes in a number and returns an array of all the prime numbers that exactly divide the input number.For example, if the input number is 18.Then the output should be −const output = [2, 3];ExampleLet’s write the code for this function −const num = 18; const isPrime = (n) => {    for(let i = 2; i {    const res = num % 2 === 0 ? [2] : [];    let start = 3;    while(start

We are required to write a JavaScript function that takes in a string and returns a new string with all the character of the original string just the whitespaces removed.ExampleLet’s write the code for this function −const str = "This is an example string from which all whitespaces will be removed"; const removeWhitespaces = str => {    let newStr = '';    for(let i = 0; i < str.length; i++){       if(str[i] !== " "){          newStr += str[i];       }else{          newStr += '';       };    };    return newStr; }; console.log(removeWhitespaces(str));OutputThe output in the console after removing whitespaces −Thisisanexamplestringfromwhichallwhitespaceswillberemoved

We are required to write a JavaScript function that takes in an array of numbers and uses the quick sort algorithm to sort it.QuickSortThis algorithm is basically a divide and conquer algorithm where we pick a pivot in every pass of loop and put all the elements smaller than pivot to its left and all greater than pivot to its right (if its ascending sort otherwise opposite)ExampleLet’s write the code for this function −const arr = [43, 3, 34, 34, 23, 232, 3434, 4, 23, 2, 54, 6, 54]; // Find a "pivot" element in the array to compare all ... Read More