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ProblemWe are supposed to create a user defined data type Streak in JavaScript that can be chained to any extent with value and operations alternativelyThe value can be one of the following strings −→ one, two three, four, five, six, seven, eight, nineThe operation can be one of the following strings −→ plus, minusFor example, if we implement the following in context of our class −Streak.one.plus.five.minus.three;Then the output should be −const output = 3;Output ExplanationBecause the operations that took place are −1 + 5 - 3 = 3ExampleFollowing is the code − Live Democonst Streak = function() { let value = 0; ... Read More
ProblemWe are required to write a JavaScript function that takes in an array of 24-hour clock time points in "Hour:Minutes" format. Our function should find the minimum minutes difference between any two time points in the array.For example, if the input to the function is −const arr = ["23:59", "00:00"];Then the output should be −const output = 1;Because the minimum difference between the times is 1 minuteExampleFollowing is the code − Live Democonst arr = ["23:59", "00:00"]; const findMinDifference = (arr = []) => { const find = (str = '') => str.split(':').map(time => parseInt(time, 10)) const mapped = ... Read More
ProblemWe are required to write a JavaScript function that takes in a sentence string, str, as the first and the only argument.Our function is supposed to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.For example, if the input to the function is −const str = 'this is some sample string';Then the output should be −const output = 'siht si emos elpmas gnirts';ExampleFollowing is the code − Live Democonst str = 'this is some sample string'; const reverseWords = (str = '') => { return str.trim() .split(/\s+/) ... Read More
ProblemWe are required to write a JavaScript function that takes in an array of numbers, arr, as the first and the only argument.The array, arr, of length N contains all integers from 0 to N-1. Our function is supposed to find and return the longest length of set S, where S[i] = {A[i], A[A[i]], A[A[A[i]]], ... } subjected to the rule below.Suppose the first element in S starts with the selection of element A[i] of index = i, the next element in S should be A[A[i]], and then A[A[A[i]]]… By that analogy, we stop adding right before a duplicate element ... Read More
ProblemWe are required to write a JavaScript function that takes in a 2-D array of numbers, arr, as the first argument and two numbers, r and c, representing the row number and column number of the desired matrix, respectively.Our function should form and return a new 2-D array with the specified rows and columns in the same row-traversing order as they were in the input array.For example, if the input to the function is −const arr = [ [6, 7], [8, 9] ]; const r = 1, c = 4;Then the output should be −const output = [[6, 7, 8, ... Read More
ProblemWe are required to write a JavaScript function that takes in an array of numbers, arr, as the first and the only argument.Our function needs to find the length of one continuous subarray such that if we only sort this subarray in ascending order, then the whole array will be sorted in ascending order, too.For example, if the input to the function is −const arr = [3, 7, 5, 9, 11, 10, 16];Then the output should be −const output = 5;Output ExplanationBecause if we sort [7, 5, 9, 11, 10], the whole array will be sorted.ExampleFollowing is the code − Live ... Read More
ProblemWe are required to write a JavaScript function that takes in an array of numbers, arr, as the first and the only argumentOur function should find and return the length of such a subarray where the difference between its maximum value and its minimum value is exactly 1.For example, if the input to the function is −const arr = [2, 4, 3, 3, 6, 3, 4, 8];Then the output should be −const output = 5;Output ExplanationBecause the desired subarray is [4, 3, 3, 3, 4]ExampleFollowing is the code −const arr = [2, 4, 3, 3, 6, 3, 4, 8]; const ... Read More
ProblemWe are required to write a JavaScript function that takes in two nested arrays, arr1 and arr2, as the first and the second argument.Our function should create and return a third array that contains all the elements of arr1 and arr2 but flattened to single dimensionFor example, if the input to the function is −const arr1 = [ 1, [ 2, [ 4, 5, [ 6 ] ] ] ]; const arr2 = [ 11, 12, [ ... Read More
ProblemWe are required to write a JavaScript function that takes in a string, str, which contains a combination of alphabets, special characters and numbers.Our function should return a new string based on the input string that contains only the numbers present in the string str, maintaining their relative order.For example, if the input to the function is −const str = 'revd1fdfdfs2v34fd5gfgfd6gffg7ds';Then the output should be −const output = '1234567';ExampleFollowing is the code − Live Democonst str = 'revd1fdfdfs2v34fd5gfgfd6gffg7ds'; const pickNumbers = (str = '') => { let res = ''; for(let i = 0; i < str.length; i++){ ... Read More
ProblemWe are required to write a JavaScript function that takes in a lowercase English alphabets string, str, as the first and the only argumentOur function should create and return a new string based on the input string which contains characters sorted according to the reverse English alphabets.For example, if the input to the function is −const str = 'abcdef';Then the output should be −const output = 'fedcba';ExampleFollowing is the code − Live Democonst str = 'abcdef'; const reverseSorting = (str = '') => { const strArr = str.split(''); const mapString = 'abcdefghijkmnopqrstuvwxyz'; const sorter = (a, b) => ... Read More