HashMaps are one of the most common data structures in Rust, and also one of the first places where ownership, borrowing, and references really start to matter.

This post walks through 10 progressively more complex exercises that cover almost every practical HashMap pattern you'll use in real Rust code. Each exercise focuses on one idea, uses idiomatic Rust, highlights ownership and borrowing decisions, and builds on the previous ones.

If you can write and understand all of these, you're no longer "learning HashMap". You're using it fluently.

Hello, world! 👋

Welcome to my corner of the web, where I share experiments with code, and the occasional reflection on the intersection of logic and software engineering.

I'm Iago Bozza — a philosopher-turned-software engineer. I specialize in building sites with Hugo, Next.js, and Supabase, and I’m currently diving deep into Rust as I progress through the OSSU curriculum.

What You’ll Find Here

This blog is a space where I write about computer science and software development. Whether it’s design principles, programming languages, or tools I love (like Rust), you'll find posts that aim to inform and inspire.

A Little About Me

Before venturing into the tech industry, I taught philosophy at the University of Miami, where I dealt with topics like logic, metaphysics, and epistemology. These experiences shaped my approach to problem-solving and structured thinking—skills I now apply to software engineering.

Feel free to connect with me via GitHub or check out my "About" page for more details about my work and background.

Thanks for stopping by, and cheers to learning together! 🎉