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Self-parking Car in 500 Lines of Code
Training the car to do self-parking using a genetic algorithm
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Bringing the Unix philosophy to the 21st century (2019)
JSON output must become the norm for application pipelining. Until then, jc can help.
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Scalable, Resilient Brainfuck
Building Brainf∗ck interpreter for the 21 century, with all the best systems design practices in mind. Think of Brainf∗ck-as-a-service cloud solution!
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Inheritance was invented as a performance hack
It's well known that inheritance was invented by Simula . The History of Programming Languages session on Simula tells us the motivations behind that invention. Let's take a look.
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WSL2 can now mount Linux ext4 disks directly
If you're on a version of Windows 11 that is build 22000 or greater, you can ...
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Fast Rust Builds
It's common knowledge that Rust code is slow to compile. But I have a strong gut feeling that most Rust code out there compiles much slower than it could.
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Software engineering is a learning process, working code is a side effect
I have come to the conclusion that Software Engineering is primarily a learning endeavour, the working code is rather a side effect. This quote is actually not mine but I am paraphrasing Alberto Brandolini who is making this very point in Event Storming (he was actually talking about Software Development, but I do not…
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Ruby 3, Concurrency and the Ecosystem
I'm a technologist with a focus in ecommerce, GenAI, and developer productivity. I enjoy building reliable and fast software, and helping others to do the same.
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Data-oriented design or why you might shoot yourself in the foot with OOP (2009)
Picture this: Toward the end of the development cycle, your game crawls, but you don’t see any obvious hotspots in the profiler. The culprit? Random memory access patterns and constant cache misses. In an attempt to improve performance, you try to parallelize parts of the code, but it takes heroic efforts, and, in the…
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Spending $5k to learn how database indexes work
At Superwall we’re building an SDK to help App Developers increase their revenue by showing the right offer to the right person at the right time. Follow me on twitter for little tips and articles like this one.
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File Descriptor Limits
Posts and writings by Lennart Poettering
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Conditionally setting your gitconfig
Did you know you can change Git attributes based on what folder you're in?
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A Critique of the Open Letter Calling for the Removal of RMS
On March 21, Richard M. Stallman (RMS) announced that he is on the Free Software Foundation (FSF) board of directors again after having resigned in September 2019. Two days later, an open letter condemning RMS as misogynist, ableist, transphobic, intolerant, bigoted, hateful, and dangerous was published. The letter…
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Trade-Offs in Automatic Differentiation: TensorFlow, PyTorch, Jax, and Julia
To understand the differences between automatic differentiation libraries, let’s talk about the engineering trade-offs that were made. I would personally say that none of these libraries are “better” than another, they simply all make engineering trade-offs based on the domains and use cases they were aiming to…
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Emacs' org-mode gets citation support
Introducing citations!
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No Easter Eggs in Curl
Easter egg; noun: An unexpected or undocumented feature in a piece of computer software, included as a joke or a bonus. There are no Easter eggs in curl. For the good. I've been asked about this many times. Among the enthusiast community, people seem to generally like the concept of Easter eggs and hidden treasures, ……
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What I wish I knew when learning F#
I’ve used F# a lot in the last 3 years and for quite some time I wanted to collect a few good starting points to venture into F# in one place. I also wanted ...
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js;dr = JavaScript required; Didn’t Read.
js;dr = JavaScript required; Didn’t Read. Pages that are empty without JS: dead to history (archive-org), unreliable for search results (despite any search engine claims of JS support, check it yourself), and thus ignorable. No need to waste time reading or responding. Also known as, if it’s not curlable, it’s not on…
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Socat – A utility for data transfer between two addresses (2018)
I learned about socat a few years ago and am generally surprised more developers don’t know about it. Maybe I appreciate it all the more…
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Functools – The Power of Higher-Order Functions in Python
<p> Python standard library includes many great modules that can help you make your code cleaner and simpler and <code class="inline">functools</code> is d...
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Practical Reed-Solomon for Programmers
Recently I was doing some work decoding the new Galileo High Accuracy Service data. In short, this new service will allow Galileo (“European GPS”) users to achieve decimeter-level accuracy, which is nice. This “HAS” data is transmitted highly redundantly by making good use of Reed-Solomon encoding. To work with this…
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Starting a TypeScript Project in 2021
This is a guide for starting a TypeScript project in 2021 with modern tooling. TypeScript 4 Optionally esbuild to bundle for browsers (and Node.js) Linting with typescript-eslint (tslint is deprecated) Testing with Jest (and ts-jest) Publishing a package to npm Continuous integration (GitHub Actions / GitLab CI)…
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Leap seconds: Causing bugs even when they don’t happen
Some new minor leap second drama is coming up, and for once we can
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Python’s tug of war between beginner-friendly and advanced features
Python is my favourite programming language. Since I discovered it in 2004, programming in Python became my favourite hobby. I've tried to l...
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Replacing Elasticsearch with Rust and SQLite (2017)
Caveat: Elasticsearch is a multi-purpose, distributed, battle-tested, schema-free, log and document storage engine. We’ll be replacing it with a single-purpose, relational schema, me-tested, and custom nginx access log storage engine. Knowing that, let’s begin. Find this project on Github After building my home…
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Why asynchronous Rust doesn't work
This is old! When I wrote it, I was a very different person.As it turns out, growing up a bit made me care a lot less about the nuances of Rust programming.
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Faster Python with Guido van Rossum
Making the Python interpreter faster
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My stack is HTML+CSS
My stack will outlive yours