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Try Gleam
Why a Rust developer might feel at home in Gleam, and where the BEAM is a different world.
New
The latest blog posts to take off on Hacker News. 149 posts.
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I'm not a fan of Deno's security model (2024)
this has been bothering me for a while now, so I want to write down my thoughts so I can get it out of my head and move on. we’re gonna talk about how Deno approaches security, specifically with its permissions system, and why I think this approach is fundamentally insecure and misleading.
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C++26 Disapproved
On October 23, 2026, the unthinkable happened. It was supposed to be a mere formality: C++26 was up for a vote by the ISO National Bodi...
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Four Months of Zig
It has been about four months since I returned to Zig after being absent for a few years. In this time, I have written some software in Zig and reengaged with the community, online and in person. I decided to share some of that experience, including what I have liked about Zig so far and what I haven't. I'll include…
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Iterating Backwards in C
This is shorter than some of my other posts, but I keep seeing people doing this wrong. It's even worse now in the LLM era.
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OpenLDK: Bringing the Java World into Common Lisp
Java classes become CLOS classes, seven JVM languages share one Lisp expression, and a saved Spring Boot application launches in 84 milliseconds.
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Small Programs and Languages
My Implementing a Forth article got some great feedback, particularly around the subject of tiny Forth implementations. (And it was an excuse to list some of the tiniest Forths I’ve seen.)
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How close can pure functional programming get to C?
In Why Lean is Faster Than Rust , the author shares an impressive result: a DEFLATE compression library written in Lean 4 , a functional programming language and proof assistant, outperforming an equivalent Rust package that crates.io says has been downloaded over a billion times. From the article:
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2026 is an exciting year for the Rust compiler (and me)
Matyáš Racek's blog
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Java sealed classes and exhaustive pattern matching
Java 17 introduced sealed classes, which allow you to explicitly list the allowed sub-types of an interface or base class. For example, here’s a toy example using a sealed interface and records (in…
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A new way to think about borrow checking (in reverse)
Have you ever had a weird idea, and then it worked, but you can't really believe it?
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Parser Combinators
Better than regex!
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I built a programming language that LLMs can't use
I built KillSwitch, an esoteric language designed to confound LLMs and coding agents, and benchmarked the major models against it.
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C++26: The New Debugging Header
If you’ve ever needed to hit a breakpoint programmatically in C++, you’ve probably written something like this: 1 2 3 4 5 6 7 8 9 #if defined(_MSC_VER) __debugbreak(); #elif defined(__clang__) __builtin_debugtrap(); #elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) __asm__ volatile("int3"); #else…
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The Folders Programming Language
Created 2015 | Updated 2026 | One of Forty-Four Esolangs , by the creator of Rivulet and Velato
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C++26 Contracts: Introduction to Preconditions and Postconditions
In the article about Standard Library hardening, we looked at checks for invalid Standard Library container access and other broken preconditions. I mentioned that those requirements are expressed in terms of “contracts”. But what about our code? In this post, we’ll explore contracts from C++26. We’ll start with a…
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Yet another way to invoke functions in JavaScript without parentheses
i found yet another way to invoke arbitrary functions in javascript without using parentheses
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Your C is not standard C
this is an incomplete list of some incompatibilities between c as it's written in the standard and c as it exists in the real world for people who use gcc/clang + glibc/musl.
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Type-safe HTML templating in Zig
I’ve done a lot of web development over the years. I started around the year 2000, just after PHP 3.0 was released and started taking over the web world. I’ve used all kinds of approaches for generating HTML: raw PHP, string concatenation in Python, Smarty templates in PHP, Template Toolkit in Perl, and Jinja/Django…
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Valen's Memory Safety: A New Kind of Borrow Checking
You all know me, I love exploring new memory safety approaches and blending them together in weird ways.
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C for Rust programmers
Interesting and unexpected details for Rust programmers learning the C programming language.
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Why Common Lisp is now the best programming language
just a diary
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Rust's derive often implies inline
In Rust, one of the most common ways to implement core traits (like Debug , Display , and Clone ) is to #[derive(...)] them, e.g.:
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Turbo Haskell
Exactly a week ago (as a joke), I started writing THC, my “Turbo Haskell compiler,” while on vacation visiting Bartosz Milewski.
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Needed 1+1, built a functional programming language
A deep dive into converting a simple arithmetic expression into a binary tree, leading to a custom language in C.
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Go Concurrency Distilled
Interactive mini-book on concurrent programming in Go.
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The state of SIMD in Rust in 2026
A lot of progress was made since last year, and I made some of it!
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Parsing Expression Grammar vs. Regexes: Building Org Parser in Lisp, Export HTML
Converting Org to HTML with (ice-9 peg) in Guile: OrgWebAlchemy
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What Zig felt like, coming from Rust
What Zig felt like, coming from Rust Intro I’ve spent the last 7 years as a Rust developer, working mostly on open source projects, and I’d like to think I’ve built a solid feel for the language and its ecosystem along the way. I gravitate toward the functional side of Rust like clean functions, expressive types, that…