This article presents a step-by-step tutorial on constructing a lightweight, dependency-free in-memory cache library. The author explains fundamental caching concepts such as data structures for storage, eviction policies (e.g., LRU), and thread safety considerations. While not intended for production use, the tutorial serves as an excellent educational tool for developers seeking to understand how caching works under the hood. The code is written in a generic style, making it adaptable to various programming languages. This approach demystifies a common component in modern applications and empowers developers to build custom solutions when needed.
A practical guide to building a lightweight in-memory cache from scratch, covering core concepts like eviction policies and data structures.