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Crafting Interpreters: Closures
As the man said, for every complex problem there’s a simple solution, and it’s wrong.
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Women: Learn to Program This Summer
As an investor, I've found that one of the reasons there are fewer female startup founders than male ones is that there are fewer female programmers. So this summer I'm trying an experiment to see...
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Better Bash History (2012)
By default, the Bash shell keeps the history of your most recent session in the .bash_history file, and the commands you’ve issued in your current session are also available with a history call. These defaults are useful for keeping track of what you’ve been up to in the shell on any given machine, but with disks much…
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A Brief Guide to a Few Algebraic Structures
Occasional writings about Haskell.
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Practical Networked Applications in Rust, Part 1: Non-Networked Key-Value Store
The PingCAP company, makers of the TiDB NewSQL database and the TiKV key-value store, have kindly made publicly available, as well as open-sourced, a set of training courses that they call the "PingCAP Talent Plan". These courses train programmers in writing distributed systems in the Go and Rust languages. They are…
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Transformers from Scratch
Repository for personal website
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Memory Management in Python
To speed-up memory operations and reduce fragmentation Python uses a special manager on top of the general-purpose allocator, called PyMalloc.
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I’m only making business card sized games now
Over the years I’ve worked on many games, some big, some small. I’ve found that the smaller the game, the more fun I seem to have making it. So I set out to make the smallest game I pos…
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Why are we templating YAML?
I was at cfgmgmtcamp 2019 in Ghent, and did a talk which I think was well received about the need for some Kubernetes configuration management as well as the solution
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Avoid Indirection in Code
I often see code where authors abstract away details by placing them in some external function. Here is a toy example:
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The Sad State of Logging Bugs for Apple
You find a bug in macOS or iOS. Something in the software isn’t working the way it should work. You decide to let Apple know, and head over to http://bugreport.apple.com and login with your Apple ID.... <a class="read-more"…
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Writing a small ray tracer in Rust and Zig
This is where I write about the stuff that I've been working on.
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I wrote a self-hosting C compiler in 40 days (2015)
I wrote a self-hosting C compiler which I named 8cc in 40 days. This is a log when I was writing it from scratch by myself in 2012. The code and its history are available at GitHub .
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Debugging Emacs, or How I Learned to Stop Worrying and Love DTrace (2018)
For some time Elfeed was experiencing a strange, spurious failure. Every so often users were seeing an error (spoiler warning) when updating feeds: “error in process sentinel: Search failed.” If you use Elfeed, you might have even seen this yourself. From the surface it appeared that curl, tasked with the…
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Why I don't use web components
For my first post on dev.to I thought I'd write about a nice, safe topic that's free of controversy:...
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PostgreSQL at low level: stay curious
Yes, I know, it’s a long text, and it was my conscious decision to write it in this way. But fear not! Imagine that you read a book, take a look at the introduction and first few interesting sections, think about it and then find time to read further. I hope I’ve left enough references, so if you don’t get some ideas…
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Arima Model – Guide to Time Series Forecasting in Python
Using ARIMA model, you can forecast a time series using the series past values. In this post, we build an optimal ARIMA model from scratch and extend it to Seasonal ARIMA (SARIMA) and SARIMAX models. You will also see how to build autoarima models in python
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The Order of the JSON
When I read Fitz’ tweet about ordered JSON my body shuddered, as my brain was flooded with a past experience that taught me a frightening lesson on technology being used by non-technical comp…
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Programming the Z3 SMT solver
Abstract. This tutorial provides a programmer ' s introduction to the Satisfiability Modulo Theories Solver Z3. It describes how to use Z3 through scripts, provided in the Python scripting language, and it describes several of the algorithms underlying the decision procedures within Z3. It aims to broadly cover almost…
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Lexical differential highlighting instead of syntax highlighting
This type of highlighting is ideal for assembly. With it, the things that shouldn't seem similar usually don't.
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Why Clojure?
I’ve programmed systems in many different languages; from assembler to Java. I’ve written programs in binary machine language. I’ve written applications in Fortran, COBOL, PL/1, C, Pascal, C++, Java, Lua, Smalltalk, Logo, and dozens of other languages. I’ve used statically typed languages, with lots of type inference…
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Three of the Hundred Falsehoods CS Students Believe
Earlier this year, many people were passing around this article about "re-learning how to be yourself online". Near the end the author reaches a set of questions that are motivating him: