In this tutorial, we'll discuss implementing an LFU (Least Frequently Used) cache. Here's what we'll cover:
What is an LFU Cache?
A brief overview of how an LFU cache works and why it's useful.
How is it Different from LRU Cache?
We'll explain the difference between LFU and LRU caching strategies.
Required Operations
The key operations we need to implement for an LFU cache.
Implementation #1: HashMap
A first pass implementation using a HashMap.
Implementation #2: Singly Linked List
An improved version using a linked list for tracking order.
Implementation #3: Doubly Linked List
Final implementation with a doubly linked list structure.
Alright, let's get started!