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Event-Driven Architecture
Using events to design applications is a practice that seems to be around since the late 1980s. We can use events anywhere in the frontend or backend. When a button is pressed, when some data chang…
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The latest blog posts to take off on Hacker News. 1,420 posts.
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Ways to paginate in Postgres (2016)
Pagination, pervasive as it is in web applications, is easy to implement inefficiently. This post examines different methods of server-side pagination and their tradeoffs in PostgreSQL. Methods explored include limit-offset, cursors, keyset pagination, as well as more exotic techniques.
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Singular Value Decomposition for Programmers
Today's article is a short one. Not because Singular Value Decomposition (SVD) is not important, but because it is so ubiquitous that we'll touch it in other...
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Is Uncle Bob serious?
Robert C. Martin (Uncle Bob) thinks that defects in safety-critical systems are caused by a lack of developer professionalism. I think he's wrong.
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Killing the C++ Modules Technical Specification
In my previous post, I mentioned that have serious issues with the current Modules TS as it is written. I have wanted to say more on the subject since my tweets, posts, and general comments are missing quite a bit of context for why I think the implementation is wrong and will be more trouble than it is worth.
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Functor-Oriented Programming
My style of Haskell programming has been evolving over the 15 years that I have been working with it. It is turning into something that I would like to call “functor oriented programming”. The traditional use of typed functional programming focuses on data types. One defines data types to model the data structures…
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The Asynchronous Computability Theorem
In this post I describe the Asynchronous Computability Theorem, which uses tools from Algebraic Topology to show whether a task is solvable…
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Tensorflow sucks
A detailed analysis
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Origins and History of Unix, 1969-1995 (2003)
A notorious ‘second-system effect‘ often afflicts the successors of small experimental prototypes. The urge to add everything that was left out the first time around all too frequently leads to huge and overcomplicated design. Less well known, because less common, is the ‘third-system effect’; sometimes, after the…
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Thoughts on Microsoft's Time-Travel Debugger
Robert O'Callahan. Christian. Kiwi. Software guy. All content human-authored unless otherwise noted.
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A Simple Approach to Building a Real-Time Collaborative Text Editor
This post is my attempt to write an easy to understand introduction to the main ideas behind building a real-time col...
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A Branchless UTF-8 Decoder
This week I took a crack at writing a branchless UTF-8 decoder: a function that decodes a single UTF-8 code point from a byte stream without any if statements, loops, short-circuit operators, or other sorts of conditional jumps. You can find the source code here along with a test suite and benchmark:
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Why many developers still prefer Objective-C to Swift
Lack of ABI stability, slow compile times, poor Xcode support, and more hold Swift back
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NNVM Compiler: A New Open End-To-End Compiler for AI Frameworks
You can choose among multiple artificial intelligence (AI) frameworks to develop AI algorithms. You also have a choice of a wide range of hardware to train and deploy AI models. The diversity of frameworks and hardware is crucial to maintaining the health of the AI ecosystem. This diversity, however, also introduces…
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Uncle Bob and Silver Bullets
A while back I wrote that Robert Martin was ruining software by being too good at programming. That was supposed to be a joke. Since then he’s done his damndest to actually ruin software by telling people they’re doing it wrong. His most recent response where he yells at software correctness was the breaking point for…
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Building on Rock, Not Sand
Robert O'Callahan. Christian. Kiwi. Software guy. All content human-authored unless otherwise noted.
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Awk for multimedia
(… and for system graphics, games and other interactive applications but that would make the title just a bit too long…) Many of the articles here have focused on the use of Arcan as a …
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PyPy v5.9 Released
The PyPy team is proud to release both PyPy3.5 v5.9 (a beta-quality interpreter for Python 3.5 syntax) and PyPy2.7 v5.9 (an interpreter sup...
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Sieve of Eratosthenes in Python (2015)
Sieve of Eratosthenes animation Source: Wikipedia[0] One of the things we need to do when finding Perrin Pseudo-Primes is to recognise prime numbers so we can see if the numbers predicted by the Perrin test to be prime, are. So we need to generate primes. For small primes (for some definition of "small") this can be…
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Building and using a 29-year-old compiler on a modern system
In this post I’ll share my experience of building and using one of the earliest versions of the GNU C Compiler — GCC 1.27 (released in 1988) on a modern system.
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Cowboy 2.0 released
This is the new stable version of Cowboy. There are no new releases planned for the 1.x version of Cowboy.
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A Program from a 35 Year Old Magazine for BASIC Month and a Chat with Its Author
July was BASIC Month over at r/Retrobattlestations and for that competition I decided to reach for my TI-99/4A and type in a TI Extended BASIC game called Pearl Harbor from the 1983 issue of Electronic Fun with Computers & Games…for … Continue reading →
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Useful GCC warning options not enabled by -Wall -Wextra
Note: This blog post was written for GCC 7. Later versions of the compiler may have added some of these warnings to -Wall or -Wextra . ...
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Are Jump Tables Always Fastest?
tl;dr: I make a petty point about premature optimization; don't go out and rewrite your switch statements as binary searches by hand; maybe do rewrite your jump tables as switch statements, though.
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