Day: April 22, 2025

When you’ve spent years writing C#, you get really comfortable with string being immutable, Span being your performance trick, and StringBuilder being your go-to hammer when a for loop starts building text.

And then you start learning Rust.

Suddenly, String isn’t immutable. &str looks suspiciously like a Span in disguise. And you realize… wait, do I even need a StringBuilder anymore?

Today on Day 12, I dove into slices and strings in Rust, and let me tell you, it’s a whole new world, but a surprisingly elegant one.