151
Differences Between `Foldl` and `Foldr`
`foldl` and `foldr` can be confusing, so let's work out what's up
New
The latest blog posts to take off on Hacker News. 21,812 posts.
152
Dear Software Makers
Marques Brownlee just released a video essay titled “Dear YouTube” . I loved it. He talks about how YouTube is going to start shipping this new feature where…
153
Commit description as a thinking tool
Before the AI era, I wrote pretty long commit descriptions (or commit bodies) for major changes. It took me about five to ten minutes to draft and reread them to make sure I didn’t miss anything important. I did that for several reasons.
154
What TLA+ can and can't check
Let's chill just a little bit on the "TLA+ will save AI from itself" narrative
155
You said no MCP
Pi now supports MCP. Why we changed our minds, what changed in MCP and in Pi, and what Codemode is.
156
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.
157
Using any C++ library in Godot
How Godot's GDExtension system and the godot-cpp bindings work, and how to use Conan to bring C and C++ libraries into a Godot game, with a flecs example that simulates 100,000 particles.
158
Solving Factorio Quality
I play Factorio the normal way: by writing matrix math code to plan the factory.
159
The problem is not AI code, but not knowing about system architecture or intent
If we think writing code is dead, and AI is generating all codebases, I still think the bigger problem is people or full teams not knowing anything anymore about the system...
160
A Staff Engineer's Guide to Inventing Work
A how-to manual for engineer-led discovery in software platforms
161
Coding is not solved
Tell me you don’t understand software without literally using those words!!!
162
Systems that no one will test
(this post figured on HNews here) This happened to me in 2020, and it has been on my mind again lately. During the worst of the pandemic, I found a vulnerability in a system that gave me access to the Brazilian federal system, and with that access I was able to retrieve information on any
163
What I did at Recurse Center
I spent the summer at Recurse Center, a programming retreat in Brooklyn, at the recommendation of my friend Cory. These are some things I did there.
164
Don't couple your Go code to GitHub
The technical musings of Iain Cambridge.
165
Software occlusion culling in Block Game
My GPU is the integrated Radeon Vega 8 that comes with my AMD Ryzen 7 5700G CPU. I tell you this so you know that my workstation is not a graphical computing powerhouse. It is, in fact, quite weak. To its credit my integrated GPU shows up as 48% faster on UserBenchmark than the GPU in my low end hardware target; a…
166
Ten lines of code that changed my world
Front-end antics and typographic mischievousness
167
Footguns with Postgres “at time zone 'UTC'”
And why you may need to repeat AT TIME ZONE 'UTC' twice. SUMMARY * AT TIME ZONE 'UTC' converts the data type from timestamptz to timestamp (example). * Now you are inadvertently using the timestamp without time zone (aka timestamp) data type, which is markedly discouraged. * There are tons of footguns with timestamp…
168
The internet discovers TLA+. Now what?
A practical introduction to TLA+, why it matters for agentic coding, and how AI could take formal verification from models to machine-checked proofs and ultimately to verified software.
169
Drawgent: Coding agent on a live Excalidraw canvas
Repository drawgent by yanndegat.tngl.sh on Tangled.
170
Turning GLM-5.3-Flash into a Jev-like decision model
Typed decisions with a probability for every option, from GLM-5.3-Flash in a single forward pass: about as accurate as Jev, faster from Europe, and protected by confidential computing. With a playground and a benchmark on 29 datasets.
171
There is more to code review than (automatable) detection
The abstract for article “ The End of Code Review: Coding Agents Supersede Human Inspection ” paints this picture for the reader…
172
Go Concurrency Distilled
Interactive mini-book on concurrent programming in Go.
173
Breaking Up with Google Play: Why Conversations Is Now Free
Conversations, my federated instant messaging client for Android, started out as many traditional open-source projects do: as an attempt to scratch my own itch. Development started in January 2014 in my student dormitory, and within weeks I started dogfooding and using the client as the primary means of communicating…
174
A single function Jev-like wrapper for LLMs, including vision models
I was intrigued by Jev and the self-hostable projects appearing around it, such as OpenJev and SemIf . Reading about them introduced me ...
175
What even is an OS now?
Computers now work the way I thought they did when I was 8. What does computing look like when most applications have an audience of 1-2 people? I'm leaving Fly.io to build a phone for that world.
176
Writing Efficient C++ Code (2013)
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177
Yes, Claude can do nine loops
Claude computes a nine-loop amplitude in N=4 super-Yang-Mills
178
C's Flexible Integer Sizes Were Not a Design Mistake
Word sizes, strange machines, and why <strong>int</strong> was never meant to mean 32 bits. C's flexible integer types were how the language achieved portability in a world of 12, 18, 36, and 60-bit computers.
179
The state of SIMD in Rust in 2026
A lot of progress was made since last year, and I made some of it!
180
Entering and Breaking the Avast Antivirus Sandbox Part 2
SAFA details the full exploitation of CVE-2025-13032, turning a double-fetch vulnerability in Avast's kernel driver into a local privilege escalation to SYSTEM on Windows 11.