The latest blog posts to take off on Hacker News. 14,543 posts.
Here are a few things you can do to make your life easier when starting a new ASP.NET Core project, or reducing duplicate code without using boilerplate. Validate model state automatically The usual way would be to have this in almost every action in all controllers: if (!ModelState.IsValid) { // return bad request…
Here is an argument I used to make, but now disagree with: Just to add another perspective, I find many “performance” problems in the real world can often be attributed to factors other…
In this post I will describe the differences between functions and coroutines and provide a bit of theory about the operations they support. The aim of this post is introduce some foundational concepts that will help frame the way you think about C++ Coroutines.
If you read my recent post about Postgres you may have noted that Postgres operates primarily with fixed-size blocks of memory called “pages.” By default, Postgres pages are 8KB. This number is tuned to match operating system page sizes which are tuned to match hardware cache sizes. If you were to run Postgres on…
ReasonML advertises itself as Syntax and toolchain for OCaml. In this article, I'll try my best to explain what ReasonML offers to the…
Pivot SQL tables with CASE or FILTER. Turn rows into columns for the entity-attribute-value model (EAV).
LLVM is a godsend of a research tool. Here are some detailed notes on what LLVM is, why you would want to use it for research, and how to get started as a compiler hacker.
The blog of Seva Zaikov
‘Monadic Parsing in Haskell’ is a short paper that laid the groundwork for libraries like Parsec and Attoparsec. Although it was published in 1998 (almost 20 years ago!) it has aged gracefully and the code samples will run with almost no changes. However, the state of the art has advanced since then and I think the…
I explain how Compiler Explorer runs on Amazon's cloud computing infrastructure
The earliest memory I had of arcade video games was watching my older brother and cousins going at the video game machines at Genting Highlands. While our parents were at the other types of games Genting Highlands was more popularly known for, we were generally let loose to play arcade games to our hearts' content…
In this brief post I want to discuss a fairly unusual feature of Haskell - functions that can be parameterized by their return type.
Previously , I installed Linux on a small ARM Chromebook and set it up without X.Org, using only the console. After neglecting that machine for quite some time, I came back to it because I wanted to try some pixel-graphics programming and the framebuffer seemed like it might be an easy target.
Please read this update instead: Why Create a New Unix Shell? (2021) . This page is obsolete!
What if PostgreSQL didn’t need VACUUM at all? This seems hard to imagine. After all, PostgreSQL uses multi-version concurrency control (MVC...
This document is an attempt to be a fairly comprehensive guide to recovering from what you did not mean to do when using git. It isn't that git is so complicated that you need a large document to take care of your particular problem, it is more that the set of things that you might have done is so large that different…
Still not really about LAPACK. It's a second part of the “outperforming” series explaining how the C++ metaprogramming can appear useful for efficient code generation.
The paradigms of programming Floyd, CACM 1979 (Also available in ) A couple of weeks ago we looked at Dan Bernstein’s very topical “thoughts on security after ten years of qmail 1.0.” From the gene…
Here’s a bit of code from Kernighan’s and Ritchie’s seminal text, The C Programming Language . I’m not sure I’d actually recommend coding this way (as written in the book, the entire program has only one comment), but it’s so darn clever and concise, I can’t help but post it. This snippet is part of a larger program…
I know that a lot of people struggle with understanding the memory model introduced in C11/C++11. In a recent conversation I was alerted to the existence of this blog post, which while correct (by …
Many software engineers use database indexes every day, but few of us really understand how they work. In this post I’ll explain: How indexing works in Postgres using B-Trees What B-Trees are Why they are a good fit for this problem Indexes in Postgres Postgres actually offers 4 different kinds of indexes for…
A cheatsheet for moving efficiently in the CLI!
Today, fast number crunching means parallel programs that run on Graphical Processing Units (GPUs). Thanks to the recent highly publicized deep learning and ...
Last week I jokingly said that POPL papers must pass an ‘intellectual intimidation’ threshold in order to be accepted. That’s not true of course, but it is the case that programming languages paper…
