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Clojure Concurrency Tutorial
In this tutorial, you'll learn 16 ways for doing concurrency in Clojure including how to start threads and how to communicate between them.
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The latest blog posts to take off on Hacker News. 14,543 posts.
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Programming: Doing it more vs. doing it better
A few years ago, very early into my programming career, I came across a story: The ceramics teacher announced on opening day that he was dividing the class into two groups. All those on the left si…
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When to Use TypeScript – A Detailed Guide Through Common Scenarios
Strap yourself in. In this guide, we compare when it's absolutely vital to be using TypeScript, the strictly-typed programming language, and when it makes sense to stick to vanilla JavaScript.
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Clean Coder Blog
Over the last several years we’ve seen a whole range of ideas regarding the architecture of systems. These include:
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Lessons learned porting 50k loc from Java to Go
Things I've learned while porting 50 thousand lines of code from Java to Go
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Waiting for PostgreSQL 12 – Allow user control of CTE materialization, and change the default behavior.
This is pretty important change, as it has the chance to cause performance issues in some cases.
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Correctness – A paradigm for sustainable software development
Edit (2019-04-09): A quick qualifier for future readers. This post talks about correctness in the sense of correct code and not formal proofs or formal specifications. I refer to correctness in the sense of avoidable runtime errors.
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Let’s Build a Simple Database (2017)
Writing a sqlite clone from scratch in C
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Inverse Live Coding: A practice for learning web development
I finished my first semester teaching at the University of Michigan. I taught EECS 493 User Interface Development all on the Web. It was a tough class for me since I had never before this class use…
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93% of Paint Splatters Are Valid Perl Programs
TLDR: read the paper and view the gallery of pretty Perl programs. In this paper, we aim to answer a long-standing open problem in the programming languages community: is it possible to smear paint on the wall without creating valid Perl?
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Idiomatic Monads in Rust
A pragmatic new design for high-level abstractions Monads (and, more generally, constructs known as “higher kinded types”) are a tool for high-level abstraction in programming languages1. Historically, there has been a lot of debate inside (and outside) the Rust community about whether monads would be a useful…
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Banish missing glyphs with Unifont
The GNU Unifont project is amazing. It contains every Unicode glyph in one single file! I am going to argue that you should bundle it with your apps, your operating systems, and - at a pinch - your websites. The Unifont is a perfect fallback font. If your app or website uses a Unicode character which isn't supported…
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What Is Idempotence?
Idempotence means duplicates don't matter. It means you can safely retry an operation with no issues. The classic example is the elevator button: you press it twice and it does not call two elevators. We explore why we would want that property in an email server.
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Loop invariants can give you coding superpowers
A loop invariant is a simple yet powerful tool for designing, testing, modifying, documenting and proving code correct.
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Clojure from Scratch to GPU: A Simple Neural Network Training API
The stage has been set for wrapping up the simplest version of a complete neural network API, and its key part that offers the entry for the /learning/ funct...
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Ruby's Creed
Every programming language has some fundamental idea(s) that drives its design and evolution. For Haskell that’s functional purity and state-of-the-art static typing, for Erlang that’s distributed programming and fault tolerance, for Clojure that’s simplicity and stability. What all these examples have in common is…
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A Go implementation of Poly1305 that makes sense
Cryptography code could be understandable if only we commented it. This Poly1305 implementation is an attempt to prove it. It should be readable with just an idea of what MACs are for, a beginner level of Go, and high school math.
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Compiler Performance and LLVM
I have always wanted the Cone compiler to be fast. Faster build times make it easier and more pleasant for the programmer to iterate and experiment quickly. Compilers built for speed, such as Turbo Pascal, D and Go, win praise and loyalty. Languages that struggle more with this, like C++ or Rust, get regular…
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How I Eat for Free in NYC Using Python, Automation, AI, and Instagram
Living and working in the big apple comes with big rent.
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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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Size visualization of Go executables using D3
Note The latest version of this document can be found online at https://dr-knz.net/go-executable-size-visualization-with-d3.html. Alternate formats: Source, PDF. Note Erratum (2019-04-02): The increase in binary size from CockroachDB v1.0 to v19.2 is 94%/125%, not 194%/225% as initially written. The increase in source…
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Why I stuck with Windows for 6 years while developing Discourse
I stuck with Windows 10 as my primary OS for 6 years, despite being a Ruby developer. In this blog post I would like to cover why this happened.
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Timestamps and Time Zones in PostgreSQL (2016)
The nuance between timestamp with and without time zone
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RaptorQ and performance optimization in Rust
I recently decided to learn more about Rust, and wrote a high performance RaptorQ (RFC6330) library. RaptorQ is a fountain code, and the core of the algorithm is a lot of matrix math over GF(256) – which translates into lots of XORs and reads from lookup tables. After getting the initial implementation working, I set…
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The Death of External Storage: Where's Google?
Android app development books
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Fibers: An Elegant Windows API
The Windows API — a.k.a. Win32 — is notorious for being clunky, ugly, and lacking good taste. Microsoft has done a pretty commendable job with backwards compatibility, but the trade-off is that the API is filled to the brim with historical cruft. Every hasty, poor design over the decades is carried forward forever…