LRU Cache Implementation from Scratch: Full Code Walkthrough
A detailed guide to implementing an LRU cache from scratch using a doubly linked list and hash map. We walk through the code, explain design trade-offs, and show real-world use cases.
Algorithms in Practice
Applying fundamental algorithms and data structures to solve everyday coding problems, with complexity analysis.
How to Solve the Two Sum Problem Efficiently
The Two Sum problem is a classic coding interview question. This guide covers brute force, hash map, and two-pointer solutions with their trade-offs.
How to Implement a Trie for Autocomplete: A Practical Guide
Learn how to implement a trie for autocomplete from scratch. This guide walks through trie structure, insertion, search, and prefix traversal with working Python code.