Day 5/90: Ownership and the borrow checker
90 Day Rust Challenge: Zero to Production
Today I wanted ownership and the borrow checker to feel like a real engineering decision, not a syntax demo. The useful shift was making ownership and the borrow checker readable in terms of ownership, borrowing, and lifetime boundaries.
The checks that mattered were who owns the value, what is borrowed and for how long, and where mutation is still allowed.
The failure mode I was actively trying to avoid was fighting the borrow checker without first deciding which value should actually own the state. I wanted ownership and the borrow checker to feel like something I could explain at a whiteboard or in a code review, not just something I recognized from docs.
That is the bar I want from this track: code that stays readable when requirements move, not just code that compiles today. I also want to keep tracing one concrete path through the code because that exposes weak assumptions faster than a larger demo.
Top comments (0)