Hash Tables
Unlock the magic of O(1) lookups with hash tables. Learn hash functions, collision resolution, and implement the data structure that powers databases and caches.
Overview
In this lesson, you'll master hash tables, the data structure that enables lightning-fast lookups in constant time. We'll explore hash functions, implement collision resolution strategies, and build a complete hash table from scratch while understanding the mathematics behind consistent performance.
Hash tables are among the most important data structures in computer science, powering everything from database indexes to programming language dictionaries. Ollie would say they're like having a magical filing system that can find any document instantly!
Key concepts you'll master:
- Understanding hash functions and their properties
- Implementing collision resolution with chaining and open addressing
- Building a complete hash table with dynamic resizing
- Analyzing load factors and performance characteristics
- Recognizing hash table applications in real systems
Next: Stacks and Queues →