https://codehakase.com/blog/Writing by Francis Sunday — long-form posts and short notes.Hugoen-usThu, 18 Jun 2026 00:00:00 +0000https://codehakase.com/shorts/a-quine-in-haskell/Thu, 18 Jun 2026 00:00:00 +0000https://codehakase.com/shorts/a-quine-in-haskell/Writing a correct quine in Haskellhttps://codehakase.com/blog/the-database-is-a-cache/Tue, 03 Mar 2026 00:00:00 +0000https://codehakase.com/blog/the-database-is-a-cache/A note on file-first systems where agents derive structured state from source documents, and the database becomes a derived cache.https://codehakase.com/blog/bounded-execution-for-ai-coding-agents/Fri, 09 Jan 2026 00:00:00 +0000https://codehakase.com/blog/bounded-execution-for-ai-coding-agents/How I built ALPF to give AI coding tools like Claude Code and Amp deterministic execution with guaranteed termination.https://codehakase.com/blog/idiomatic-haskell-refactors/Sun, 19 Oct 2025 00:00:00 +0000https://codehakase.com/blog/idiomatic-haskell-refactors/A note on some interesting idiomatic Haskell patterns I've learned and enjoy using.https://codehakase.com/shorts/parsing-not-guessing/Sat, 14 Jun 2025 00:00:00 +0000https://codehakase.com/shorts/parsing-not-guessing/Using ASTs over regex to build a predictable, lightweight, theme-aware Markdown renderer in Go.https://codehakase.com/shorts/import-reflect/Tue, 10 Jun 2025 00:00:00 +0000https://codehakase.com/shorts/import-reflect/An attempt at a concise explanation of Go's reflection library.https://codehakase.com/blog/maps-dont-shrink-in-go/Tue, 27 May 2025 00:00:00 +0000https://codehakase.com/blog/maps-dont-shrink-in-go/A note on how Go maps handle memory allocation and why they don't shrink automatically.https://codehakase.com/shorts/ttys/Tue, 13 May 2025 00:00:00 +0000https://codehakase.com/shorts/ttys/Learn about the `tty` command, which returns the current user's terminal name.https://codehakase.com/shorts/gadts-for-type-level-domain-logic/Wed, 07 May 2025 00:00:00 +0000https://codehakase.com/shorts/gadts-for-type-level-domain-logic/Using Generalized Algebraic Data Types (GADTs) in Haskell to encode domain-specific rules and state transitions.https://codehakase.com/shorts/composable-parsers-with-attoparsec/Tue, 06 May 2025 00:00:00 +0000https://codehakase.com/shorts/composable-parsers-with-attoparsec/Using Attoparsec in Haskell to create efficient and composable parsers for structured text data.https://codehakase.com/shorts/implementing-non-copyable-embedded-structs/Tue, 06 May 2025 00:00:00 +0000https://codehakase.com/shorts/implementing-non-copyable-embedded-structs/Using a noCopy marker in Go to prevent accidental copying of embedded structs, ensuring safe concurrent access to shared resources.https://codehakase.com/shorts/tmux-sessionizer/Mon, 05 May 2025 00:00:00 +0000https://codehakase.com/shorts/tmux-sessionizer/Using tmux-sessionizer to manage tmux sessions efficiently, with custom modifications for a streamlined development workflow.https://codehakase.com/shorts/scripting-a-self-updating-github-readme/Thu, 01 May 2025 00:00:00 +0000https://codehakase.com/shorts/scripting-a-self-updating-github-readme/Automating the update of my Github profile README using Go and Github Actions to fetch blog posts and render a template.https://codehakase.com/blog/notes-on-building-a-coding-agent/Fri, 25 Apr 2025 00:00:00 +0000https://codehakase.com/blog/notes-on-building-a-coding-agent/My personal reflections on Thorsten's Ampcode article, which reveals how building AI coding agents can be more about leveraging powerful models than complex, custom code.https://codehakase.com/blog/functors-identity-composition-and-fmap/Wed, 26 Mar 2025 00:00:00 +0000https://codehakase.com/blog/functors-identity-composition-and-fmap/An introduction to Functors in Haskell, exploring how fmap allows function application within wrapped contexts like Maybe and lists.https://codehakase.com/blog/largest-product-in-a-series/Fri, 07 Feb 2025 00:00:00 +0000https://codehakase.com/blog/largest-product-in-a-series/A short note on my haskell solution to Project Euler's problem 8https://codehakase.com/blog/working-with-json-in-go/Mon, 03 May 2021 00:00:00 +0000https://codehakase.com/blog/working-with-json-in-go/A summary of the encoding/json package in Gohttps://codehakase.com/blog/enum-stringer-interface-optimisation-in-go/Thu, 08 Apr 2021 00:00:00 +0000https://codehakase.com/blog/enum-stringer-interface-optimisation-in-go/A tip on how to optimise enum stringer interfacehttps://codehakase.com/blog/line-numbers-in-vim/Fri, 07 Feb 2020 00:00:00 +0000https://codehakase.com/blog/line-numbers-in-vim/Vim’s absolute, relative and hybrid line numbershttps://codehakase.com/blog/what-i-use/Fri, 10 Jan 2020 00:00:00 +0000https://codehakase.com/blog/what-i-use/My development gear setuphttps://codehakase.com/blog/building-small-containers-for-kubernetes/Sat, 01 Dec 2018 00:00:00 +0000https://codehakase.com/blog/building-small-containers-for-kubernetes/This article will show you how you can build small containers to make your Kubernetes deployments faster and more secure.https://codehakase.com/blog/building-a-web-app-with-go-gin-and-react/Fri, 20 Apr 2018 00:00:00 +0000https://codehakase.com/blog/building-a-web-app-with-go-gin-and-react/In this tutorial, I'll show you how easy it is to build a web application with Go and the Gin framework and add authentication to it.https://codehakase.com/blog/the-couchdb-replicator-database-an-overview/Thu, 19 Apr 2018 00:00:00 +0000https://codehakase.com/blog/the-couchdb-replicator-database-an-overview/An overview of how the replicator database works in CouchDB, and how to setup replication like a Boss.https://codehakase.com/blog/heres-whats-new-in-go-1.10/Tue, 06 Mar 2018 00:00:00 +0000https://codehakase.com/blog/heres-whats-new-in-go-1.10/The latest Go release, v1.10 arrived six months after V1.9. This release was stated in the change-logs and the Go blog. I'm gonna share some interesting changes I've found in Go 1.10 with you.https://codehakase.com/blog/react-native-vs-ionic-a-quick-comparison/Tue, 05 Dec 2017 00:00:00 +0000https://codehakase.com/blog/react-native-vs-ionic-a-quick-comparison/Demistifying the differences between Ionic and React Nativehttps://codehakase.com/blog/getting-started-with-go-variables/Sun, 19 Nov 2017 00:00:00 +0000https://codehakase.com/blog/getting-started-with-go-variables/Learn about variables in Gohttps://codehakase.com/blog/golang-getting-started-the-practical-dev/Sat, 18 Nov 2017 00:00:00 +0000https://codehakase.com/blog/golang-getting-started-the-practical-dev/Getting started with Gohttps://codehakase.com/blog/terminal-for-beginners/Sat, 28 Oct 2017 00:00:00 +0000https://codehakase.com/blog/terminal-for-beginners/A simple guide to getting started with the Terminalhttps://codehakase.com/blog/how-i-learned-golang/Sat, 02 Sep 2017 00:00:00 +0000https://codehakase.com/blog/how-i-learned-golang/How I started with Go Programminghttps://codehakase.com/blog/javascript-async/await-101/Sat, 12 Aug 2017 00:00:00 +0000https://codehakase.com/blog/javascript-async/await-101/A simple guide to getting started with Async and Await in JavaScripthttps://codehakase.com/blog/for...in-vs-for...of-loops-in-javascript/Mon, 19 Jun 2017 00:00:00 +0000https://codehakase.com/blog/for...in-vs-for...of-loops-in-javascript/Differences between the for..in and for..of loops in javascripthttps://codehakase.com/blog/build-your-first-restful-api-with-node.js/Tue, 13 Jun 2017 00:00:00 +0000https://codehakase.com/blog/build-your-first-restful-api-with-node.js/A simple guide to building RESTful apis with Node.jshttps://codehakase.com/blog/making-hakasebot-twitter-bots-101/Tue, 30 May 2017 00:00:00 +0000https://codehakase.com/blog/making-hakasebot-twitter-bots-101/Learn how to make a twitter bot from this guidehttps://codehakase.com/blog/javascript-objects-101/Thu, 25 May 2017 00:00:00 +0000https://codehakase.com/blog/javascript-objects-101/A gentle guide to getting started with JavaScript Objectshttps://codehakase.com/blog/introduction-to-javascript-promises/Sun, 21 May 2017 00:00:00 +0000https://codehakase.com/blog/introduction-to-javascript-promises/The basics you need to know, about promises in JavaScripthttps://codehakase.com/blog/object-oriented-php-an-easy-approach/Wed, 17 May 2017 00:00:00 +0000https://codehakase.com/blog/object-oriented-php-an-easy-approach/A simple guide to getting started with Object Oriented PHPhttps://codehakase.com/blog/introducing-adonis-js/Tue, 09 May 2017 00:00:00 +0000https://codehakase.com/blog/introducing-adonis-js/An introduction to the AdonisJs framework for Node.js