removeStars This post is about how to remove stars from a string leetcode javascript solution. For problem statement click here. This is very easy solution remove stars from string in javasc… Read More

 Javascript program of next greater element I leetcode solutionvar nextGreaterElement = function(nums1, nums2) {     let hash = {}, result = [], index, j; &nbsp&hell…Read More

 Javascript program moving average from data stream leetcode solution var MovingAverage = function(size) {     this.size = size;     this.slidingW… Read More

Javascript program of number of recent calls leetcode solution  var RecentCounter = function() {     this.slideWindow = [];};RecentCounter.prototype.ping = function(t)… Read More

Javascript program to make the string great leetcode solutionvar isBadCasing = function(c, s) {     return Math.abs(c.charCodeAt() - s.charCodeAt()) === 32;}var makeGood = f… Read More

/** * @param {string} path * @return {string} */Javascript program to simplify path javascript leetcode solution  var simplifyPath = function(path) {     let p = path.s… Read More

This solution beats 98% time complexity and 97% space complexity in javascript leetcode solution. What we are doing in this solution, we are finding middle node in linked list. After that we… Read More

swapNodes This is very simple and easy program to swap nodes in linked list javascript. Suppose we have a linked list [1,2,3,4,5,6] and we have to swap nth node from start and end of the lin… Read More

 This post is about how to remove nth node in linked from end in javascript. Here are the steps to solve this problem :-1) calculate number of nodes in linked list2) find node to be del… Read More

 This post is about how to delete middle node from linked list in javascript. There are two approaches to solve this problem. In either way we break link of middle node to the next node… Read More

  This post is about how to reverse linked list in range. Likewise :- we have linked list = 123456 and we have left and right index for which we have to reverse. For left = 2, righ… Read More

This post is about how to reverse linked list in javascript. This is conventional way to reverse a linked list in javascript.Javascript program for reverse a linked list var reverseList = fu… Read More

This post is about delete duplicates from linked list in javascript. In linked list we don't need to delete nodes we can just skip reference of next node. The hit here is we doing ptr.next =… Read More

This is very easy solution to find middle node of linked list in javascript. The approach is simple, move slow pointer 1 step and fast pointer 2 steps. When fast pointer reaches end of the l… Read More

This post is about how to check whether there is cycle in linked list or not in javascript. This is commonly asked question in linked list. Javascript program to check cycle in linked list&n&hell…Read More

 As per leetcode this question is asked in many companies and medium level problem. For problem statement click here. It took me while to understand the problem. It is like we have orde… Read More

Javascript program for word pattern easy leetcode solution var wordPattern = function(pattern, s) {     let hash1 = {}, hash2 = {}, s1 = s.split(" ");    &n&hell…Read More

This post is about how to solve isomorphic strings javascript leetcode solution. For problem statement click here.Javascript program to solve isomorphic strings Method1 :Using hash we can ca… Read More

This post is about how to solve permutation in string javascript leetcode solution. For problem statement click here# IntuitionAs first string length is constant. It means it could be solved… Read More

This post is about find maximum sum subarray of unique elements from an array. This is leetcode problem asked in many companies. This type of problems in which we have to deal with subarray… Read More

This post is about solve binary subarrays with sum javascript leetcode solution. For problem statement click here . I solve this problem using sliding window technique. It is very fast, it b… Read More

This post is about find number of good pairs in javascript leetcode solution. For problem statement click here Javascript program to find number of good pairs var numIdenticalPairs = fu… Read More

hash This is post about how to sort characters by frequency in javascript leetcode solution. For problem statement click here. This is very easy apporach to solve this problem. We use hash f… Read More

This post is about how to find unique number of occurrences in javascript leetcode. For problem statement click here. This is medium level difficulty question. I solved using set and hashmap… Read More

 This is post to find lucky integer in an array javascript leetcode solution. For problem statement click hereJavascript program to find lucky integer in an array var findLucky = f… Read More

 This is about how to find sum of unique elements in javascript leetcode solution. For detailed problem statement click hereJavascript program for sum of unique elements var sumOfU… Read More

 isPathCrossing This post is about how to solve path crossing problem of leetcode in javascript with easy way. For problem description please click here.Algorithm (isPathCrossing) := 1)… Read More

This is easy solution of destination problem of leetcode in javascript. For problem statement click here   The approach is simple I store mapping of source and destination in… Read More

 This post is about how to find longest substring without repeating characters leetcode solution in javascript. This is medium level leetcode problem. we will discuss two approaches for… Read More

This is program to find equal row and columns in javascript leetcode. Suppose we have a matrix = [[1,2,3][2,3,1][3,2,1]]row1 = [1,2,3] and columns = [[1,2,3], [2,3,2], [3,1,1]]row2 = [2,3,1]… Read More

This is program to find maximum sum of pairs with equal sum of digits in an array. Basically we could do in different ways. I used hashing for solving this problem which beats 90.83 % in lee… Read More

This is leetcode solution of minimum consecutive cards to pick up from deck. This problem is asked in google interview. Many of us can find the solution with brute force apporach. If you fol… Read More

This is the javascript program to calculate quickest way to find groups of anagrams in an array. This is leetcode medium category problem but you could with an ease.1st Method (Using Sorted… Read More

Javascript program to find largest unique solution in javascriptvar largestUniqueNumber = function(nums) {     let map = new Map(), largest = -1;     … Read More

Javascript program to count number of nice subarraysvar numberOfSubarrays = function(nums, k) {     let left = 0, oddCount = 0, temp = 0, result = 0;    &n&hell…Read More

Object is reference type variable in javascript. So mathematical operations is not possible with object. Although we can do with their variables.For example :-const obj = {   &nbsp&hell…Read More

In this post we will learn how to create class in javascript using ecmascript5. Ecma Script is javascript standardisation so that it can be used consistently in different bro… Read More

Please refer this link for the problem statement click here function lonelyinteger(a) { // Write your code here let hash = {}; for(… Read More

Please refer this link for the problem statement click here function maximizingXor(l, r) {     // Write your code here     … Read More

Please refer this link for the problem statement click here function flippingBits(N) {     return ~N >>> 0; }Time Complexity : O(1)  S… Read More

Please refer this link for the problem statement click here function superDigit(n, k) {     if (n 10) {         retu… Read More

Please refer this link for the problem statement click here function gameOfStones(n) {     // Write your code here     if (n % 7… Read More

Please refer this link for the problem statement click here function towerBreakers(n, m) {     // Write your code here     if(m == 1)… Read More

        Please refer this link for the problem statement click here         function nimGame(pile) {… Read More

        Please refer this link for the problem statement click here         function chessboardGame(x, y) {… Read More

Please refer this link for the problem statement click here function misereNim(pile) { // Write your code here let xor = pile[0], totalStones = pile[0]; fo… Read More

Please refer this link for the problem statement click here function nimbleGame(s) {     // Write your code here     let xor = 0;… Read More

Please refer this link for the problem statement click here function pokerNim(k, c) {     let res = c[0], i = 1;     do {     … Read More

function constructSuffixArray(s) { let hash = {}, sortable = []; for(let i = 0; i hash[i] = s.slice(i); } for (var key in hash) { sortable.push([key, hash[key]]… Read More

This is similar program to find all paths you can go through search section and find that posts. This program calculates or find all paths with some blockage / huddles in paths. This post i… Read More

This is interesting question asked in the top tech interviews. Suppose you have keypad mobile which have some alphabets written beneath of every number. Like this :-  1   2&n&hell…Read More

This program finds all the trios or three elements which sums to given sum. It is basically three sum problem in which we using three pointers start, startPointer and endPointer. We basicall… Read More

This program is for finding all pairs which sums to he required sum given. Suppose we have an array = [1,2,3,4] and sum is 5. This approach is very effective if we have sorted array provided… Read More

Here we will discuss about n Queen problem in javascript. N Queen problem is famous backtracking problem to understand the concept.It is like we have a grid / matrix / board in which place t… Read More

Here we will see how we can rotate array in java script by d (where d is number of shifts required) in O(n).Let's focus on the logic we apply here :-Let's take an array = [1, 2, 3, 4, 5, 6… Read More

Suppose we have given array of objects given some keys. We have to find summation of respective keys. function sum(arr) {     let c = arr.slice(); // so that no modificatio… Read More

This post is on most useful fundamental in javascript. What it can be ? Right, "Object". As we know everything in javascript is Object because everything derives from Object prototype. In th… Read More

We have to perform currying to solve this javascript. Currying is the process in javascript where we return result by using multiple brackets where under the hood we returning multiple funct… Read More

This post would be most interesting for javascript lovers. Actually javascript behaves different than other language. We don't have any data types in javascript which makes javascript very f… Read More

function isValid(m, i, j) {if(i >= 0 && i m.length && j >= 0 && j m[0].length && m[i][j] != 'X') return true;return false;}function find(m, i, j, path… Read More