Posts tagged "rust"

When you write let s: &str = "hello world", there are really two things in one line, living in two different places. Here is what each one is, where it lives, and why that explains lifetimes.

Two identifiers, two different jobs. DefId names a definition across the whole compiler pipeline and across crates. HirId points to a node in the syntax tree of the current crate. Mixing them up is the first stumbling block when reading rustc source code.

How I built a custom code execution engine backed by a Rust/Axum microservice, embedded directly in blog articles. Covers the security model, subprocess isolation with setrlimit, HMAC request signing, and the tradeoffs behind every decision.

In Java, mutating a Map inside computeIfAbsent compiles fine and blows up at runtime. In Rust, the same pattern does not compile at all. This is what safe by design actually means.

A deep dive into what actually happens when you write #[tokio::main]. We'll tear apart the macro, expose the state machines, and reveal the work-stealing scheduler hiding beneath five lines of code.