leetcode

Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.

1. Two Sum - javascript solution

Return the indices of the k weakest rows in the matrix ordered from weakest to strongest.

1337. The K Weakest Rows in a Matrix - javascript solution

Given an array arr of integers, check if there exist two indices i and j

1346. Check If N and Its Double Exist - javascript solution

Given a m x n matrix grid which is sorted in non-increasing order both row-wise and column-wise, return the number of negative numbers in grid.

1351. Count Negative Numbers in a Sorted Matrix - javascript solution

Given a 1-indexed array of integers numbers that is already sorted in non-decreasing order, find two numbers such that they add up to a specific target number.

167. Two Sum II - Input Array Is Sorted - javascript solution

Given a string containing digits from 2-9 inclusive, return all possible letter combinations hat the number could represent. Return the answer in any order

17. Letter Combinations of a Phone Number - javascript solution

Given an array nums containing n distinct numbers in the range [0, n], return the only number in the range that is missing from the array.

268. Missing Number - javascript solution

You are given an API bool isBadVersion(version) which returns whether version is bad. Implement a function to find the first bad version. You should minimize the number of calls to the API.

278. First Bad Version - javascript solution

Given an array of integers nums sorted in non-decreasing order, find the starting and ending position of a given target value.

34. Find First and Last Position of Element in Sorted Array - javascript solution

Given a sorted array of distinct integers and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in order.

35. Search Insert Position - javascript solution

Given two integer arrays nums1 and nums2, return an array of their intersection. Each element in the result must appear as many times as it shows in both arrays and you may return the result in any order

350. Intersection of Two Arrays II - javascript solution

Given a positive integer num, write a function which returns True if num is a perfect square else False.

367. Valid Perfect Square - javascript solution

Return the number that I picked. Every time you guess wrong, I will tell you whether the number I picked is higher or lower than your guess.

374. Guess Number Higher or Lower - javascript solution

Given an m x n matrix, return all elements of the matrix in spiral order.

54. Spiral Matrix - javascript solution

Given a non-negative integer x, return the square root of x rounded down to the nearest integer. The returned integer should be non-negative as well.

69. Sqrt(x) - javascript solution

Write an efficient algorithm that searches for a value target in an m x n integer matrix matrix. This matrix has the following properties

74. Search a 2D Matrix - javascript solution

Return the smallest character in letters that is lexicographically greater than target. If such a character does not exist, return the first character in letters

744. Find Smallest Letter Greater Than Target - javascript solution

You must solve it in O(log(arr.length)) time complexity.

852. Peak Index in a Mountain Array - javascript solution

snippets

A simple code snippet to turns dark mode on or off in your nextjs and tailwindcss project using TypeScript example. Create React dark mode class.

Next JS and Tailwind CSS Dark Mode Switch

A function that creates a hash from string provided by API consumer. We then hash it to verify all future requests to any of our routes.

Create a Hashing function using built in Crypto module of Node.js

A simple function that you can use to create a random 24 characters nanoid for the primary keys of your database entities.

Generate a nanoid with 24 random characters using JavaScript.

Create a middleware to validate key value pairs of an object in node js and express js bootstrapped application. Strict validation of request body.

Node.js Middleware to validate key/value pairs of an object

tutorials

Build your own an email marketing and tracker app using nestjs. Track campaign performance, open, unopened, and unsubscribe rate. Nodemailer. Gmail OAuth.

Build An Email Tracking App - NestJS Tutorial

How to build your own pagination component in a reactjs application? Read this blog to find out more.

Problem	Last Updated
1. Two Sum	Nov 27, 2022
1337. The K Weakest Rows in a Matrix	Nov 02, 2022
1346. Check If N and Its Double Exist	Oct 30, 2022
1351. Count Negative Numbers in a Sorted Matrix	Nov 27, 2022
167. Two Sum II - Input Array Is Sorted	Oct 30, 2022
17. Letter Combinations of a Phone Number	Oct 24, 2022
268. Missing Number	Nov 27, 2022
278. First Bad Version	Nov 27, 2022
34. Find First and Last Position of Element in Sorted Array	Nov 27, 2022
35. Search Insert Position	Nov 27, 2022
350. Intersection of Two Arrays II	Oct 30, 2022
367. Valid Perfect Square	Nov 27, 2022
374. Guess Number Higher or Lower	Nov 27, 2022
54. Spiral Matrix	Nov 26, 2022
69. Sqrt(x)	Nov 27, 2022
74. Search a 2D Matrix	Nov 02, 2022
744. Find Smallest Letter Greater Than Target	Nov 27, 2022
852. Peak Index in a Mountain Array	Nov 27, 2022

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