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Dynamic Graphs
TL;DR: Alex Lang and I recently “finished” a library for dealing with dynamic graphs. The library focuses on the dynamic connectivity problem in particular, although it can do some other things as...
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Beeraffe
This weekend, I finished a silly little game in PureScript called Beeraffe. You can play it here and view the source code here. In this blogpost, I want to give some more background information on how...
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The ZuriHac registration system
Introduction I am one of the organizers of ZuriHac, and last year, we hand-rolled our own registration system for the event in Haskell. This blogpost explains why we decided to go this route, and we...
View ArticlePartial application using flip
I have been writing Haskell for a reasonable time now – I believe I am coming up on ten years – so sadly the frequency with which I discover delightful things about the language has decreased. However,...
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Mandelbrot & Lovejoy's Rain Fractals
Summary At some point during ICFP2019 in Berlin, I came across a completely unrelated old paper by S. Lovejoy and B. B. Mandelbrot called “Fractal properties of rain, and a fractal model”. While the...
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Visual Arrow Syntax
Not to be taken seriously. Haskell is great building at DSLs – which are perhaps the ultimate form of slacking off at work. Rather than actually doing the work your manager tells you to, you can build...
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Lazy Sort: Counting Comparisons
Introduction {-# LANGUAGE BangPatterns #-} module Main where import Data.IORef (IORef) import qualified Data.Map as Map import qualified Data.IORef as IORef import Control.Monad (replicateM, forM_,...
View ArticleHaskell Puzzles
At ZuriHac 2023, I worked on some Haskell Puzzles together with Alex, Francesco, Jussi and Patrick. You are given some Haskell tokens and a goal term, and you need to rearrange the tokens into an...
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Lazy Layout
Prelude This blogpost is written in reproducible Literate Haskell, so we need some imports first. Show me the exact imports… {-# LANGUAGE DeriveFoldable #-} {-# LANGUAGE DeriveFunctor #-} {-# LANGUAGE...
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Turnstyle
I am delighted and horrified to announce a new graphical programming language called Turnstyle. You can see an example below (click to run). img.turnstyle, .interpreter svg { max-width: 90%;...
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