Under the Hood: Building a Custom HashMap in Java
A step-by-step guide explaining how Java's HashMap works under the hood by building a custom HashMap from scratch, using simple analogies.
Under the Hood: Building a Custom HashMap in Java
A step-by-step guide explaining how Java's HashMap works under the hood by building a custom HashMap from scratch, using simple analogies.
Understanding Design URL Shortener in Java
Learn how to build a URL Shortener using maps and unique Base36 index conversion.
Understanding Design Parking Lot in Java
Learn how to model a parking lot system using Object-Oriented Programming (OOP) and polymorphism.
Understanding Design Twitter in Java
Learn how to build a simplified Twitter system with follow, unfollow, post, and news feed features.
Understanding Design Hit Counter in Java
Learn how to design a hit counter that records hits in the past 5 minutes.
Understanding LRU Cache in Java
Learn how to design a Least Recently Used (LRU) Cache using a HashMap and a Doubly Linked List in O(1) time.
Understanding Palindrome Partitioning in Java
Learn how to partition a string into all possible palindromic substrings using backtracking.
Understanding N-Queens in Java
Learn how to solve the classic N-Queens puzzle on an N x N chessboard using backtracking.
Understanding Word Search in Java
Learn how to search for a word in a 2D board using DFS and backtracking.
Understanding Permutations in Java
Learn how to generate all permutations of an array using backtracking.