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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
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
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 ...
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
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]
ProblemWe are required to write a JavaScript function that takes in an array of unique non-negative integers. Our function should return a 32-bit integer such that the integer, in its binary representation, has 1 at only those indexes (counted from right) which are in the sequence.ExampleFollowing is the code − Live Democonst arr = [1, 2, 0, 4]; const buildDecimal = (arr = []) => { const bitArr = Array(31).fill(0); let res = 0; arr.forEach(el => { bitArr.splice((31 - el), 1, 1); }) bitArr.forEach((bit, index) => { res += (2 * (31-index) * bit); }); return res; }; console.log(buildDecimal(arr));OutputFollowing is the console output −14
ProblemWe are required to write a JavaScript function that takes in a lowercase alphabet string. The index of ‘a’ in alphabets is 1, of ‘b’ is 2 ‘c’ is 3 … of ‘z’ is 26.Our function should sum all the index of the string characters and return the result.ExampleFollowing is the code − Live Democonst str = 'lowercasestring'; const findScore = (str = '') => { const alpha = 'abcdefghijklmnopqrstuvwxyz'; let score = 0; for(let i = 0; i < str.length; i++){ const el = str[i]; const index = alpha.indexOf(el); score += (index + 1); }; return score; }; console.log(findScore(str));OutputFollowing is the console output −188
ProblemWe are required to write a JavaScript function that takes in a string that contains numbers separated by spaces.The string either contains all odd numbers and only one even number or all even numbers and only one odd number. Our function should return that one different number from the string.ExampleFollowing is the code − Live Democonst str = '2 4 7 8 10'; const findDifferent = (str = '') => { const odds = []; const evens = []; const arr = str .split(' ') .map(Number); arr.forEach(num => { if(num % 2 ... Read More
ProblemWe are required to write a JavaScript function that lives in the Math class of JavaScript.Our function should return the nearest greater integer of the decimal number it is being called on.If the number is already an integer, we should return it as it is.ExampleFollowing is the code − Live Democonst num = 234.56; Math.ceil = function(num){ if(typeof num !== 'number'){ return NaN; }; if(num % 1 === 0){ return num; }; const [main] = String(num).split('.'); return +main + 1; }; console.log(Math.ceil(num));OutputFollowing is the console output −235
ProblemWe are required to write a JavaScript function that takes in a number that specifies the perimeter for a triangle. Our function should return an array of all the triangle side triplets whose perimeter is same as specified by the input.ExampleFollowing is the code − Live Democonst perimeter = 120; const findAllRight = (perimeter = 1) => { const res = []; for(let a = 1; a