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How to implement a spreadsheet
My friend Lindsey Kuper recently remarked on Twitter that spreadsheets were commonly understood to be the most widely used dataflow program...
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 14,544 posts.
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Reverse Engineering the DualShock 4
This year I got a very special gift for Christmas: a broken DualShock 4. :smile:You may say it’s a relatively poor gift, but the person who gave me this know...
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Reed Solomon codes are cool
thoughts
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Generating Simpson's Paradox with Z3
I’ve been reading Pearl’s Causal Inference in Statistics , and one of the exercises poses this problem:
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Ultra efficient vector extension for SQLite
Making vector search fast, memory-efficient, and natural in SQLite.
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Back to old tricks, or, baby steps in Rust
I’ve been learning Rust for the past twenty days or so, working through the Blandy & Orendorff book, coding up things as I go. Once I got into playing with Rust traits and closures and as…
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Editing Code in Emacs
When you write code, you want to focus on the code, not on the text of the code. This means a) you have to have a good text editing setup, and b) you need to have a muscle-memory level instinct for using that setup. The second comes with practice and with consistency (i.e. not changing your config too much too…
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Bloom Filters: More than a space-efficient hashmap
A bloom filter is one of those data structures you are probably already aware of, or have at least heard about. For those looking for a simple recap, they are a probabilistic data structure which can …
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Evolutionary algorithm to find Quake III's fast inverse square hack with Python
Curiosity killed the cat I've always been amazed by early game developers. Unlike today, they had to bend and twist software to its extre...
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Design and Implementation of a Win32 Text Editor (2005)
Welcome to the brand new tutorial series - “Design and Implementation of a Win32 Text Editor!” The purpose of these tutorials is to follow the development of a …
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TCC RISC-V Compiler Runs in the Web Browser (Thanks to Zig Compiler)
Today we're running Apache NuttX RTOS inside a Web Browser. What if we could compile and test NuttX Apps in the Web Browser? Let's explore with TCC 64-bit RISC-V Compiler, compiled to WebAssembly with Zig Compiler.
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I made a terminal pager
A writeup on implementing my own terminal viewport component in Go, which is used in my Terminal pager robinovitch61/lore and in my Kubernetes log viewer terminal application robinovitch61/kl.
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Legally Free Python Books List
Searching for the best legally free Python books can be overwhelming with so many broken links and outdated resources. This curated list provides over 80 high-q...
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How I came to write “Tidy First?” tl;dr it took 18 years
Taking a software design course in college (Go Ducks!), we used Ed Yourdon (RIP) & Larry Constantine’s book Structured Design as a text.
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Running JRuby on the Graal JIT
Hello, friends! Long time no blog!I'm still here hacking away on JRuby for the benefit of Rubyists everywhere, usually slogging through compatibility fixes and new Ruby features. However with the release of JRuby 9.2, we've caught up to Ruby 2.5 (the current release) and I'm spending a little time on performance.I…
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500 Python Interpreters
As we approach the final release date for Python 3.13, I’ve seen an uptick in discussion regarding 3.13’s introduction of an optional GIL. While removing the GIL has been a long time coming for the average user (I’ve dreamt of this for nearly 20 years), there have actually been two concurrent efforts to improve…
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I made a build visualizer to understand Bun's compile times
I built buildprof (Github), an open-source tracing tool that shows where the time goes when you compile software on Linux. Here’s a realtime video of it profiling a clean build of ripgrep: Watch the …
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Working with GitHub Actions
GitHub Actions are still in beta and are changing quickly. But if you are looking to get started the possibilities are endless.
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LLMs and Code Optimization
Dave Andersen's (new) blog
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An introduction to virtual memory
...and the crucial role it plays in modern operating systems.