Haskell Weekly

Welcome to another issue of Haskell Weekly! Haskell is a safe, purely functional programming language with a fast, concurrent runtime. This is a weekly summary of what’s going on in its community.

Featured

• Abusing Constraints for Automatic Documentation by Sandy Maguire

  Determining this by hand is tedious and error-prone, and worse, doesn’t stay up to date with code changes. Instead, let’s see how we can use the type system to eliminate the pain.

• Binary search over floating point representations by Brent Yorgey

  I got some good feedback on my last post about binary search, and thought it was worth a follow-up post.

• From delimited continuations to algebraic effects in Haskell by Li-yao Xia

  The upcoming version of GHC will feature primitives for delimited continuations. Let’s put them to use and build a bare bones algebraic effect system.

• Monthly Update On A Haskell Game Engine by Rodrigo Mesquita

  Hey all, I’ve been working the past month or two in a game engine (called Ghengin).

• Optimising Haskell, example 2 by Neil Smith

  The day 23 solution takes too long (around seven minutes on my machine) so this post shows how a different representation can make a big difference in performance.

• Parallel streaming in Haskell: Part 1 - Fast, efficient, and fun! by Channable

  This post explains how we parallelized our system without incurring any significant overhead costs, allowing us to linearly speed-up our workloads with the number of cores available.

• Seven GUIs in reflex-vty, Part 2: The Temperature Converter by Obsidian Systems

  We’re going to implement the 7GUIs in Haskell using the reflex functional reactive programming framework.

Jobs

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In brief

• 2022 Recap by Gil Mizrahi

  In this post I’d like to look back and talk about a few personal projects I’ve worked on in 2022.

• 2022; year in review by Tom Sydney Kerckhove

  Another year, another “year in review” blogpost.

• Haskell Foundation DevOps Weekly Update, 2023-01-04 by Bryan Richter

  I’m still working on notarization of GHC installation files for Mac.

• Monthly Hask Anything (January 2023)

  This is your opportunity to ask any questions you feel don’t deserve their own threads, no matter how small or simple they might be!

Show & tell

• atomic-counter by Sergey Vinokurov

  Mutable cells that hold an integer value and can be safely modified from multiple threads.

• PokerSolver

• vad-audio by Jim Snavely

  Voice Assistant provides basic functionality to enable the creation of a voice activated software agent.

• xdg-basedir-compliant by Pierre Thierry

  This is a compliant implementation of the XDG Base Directory Specification.

Call for participation

• flora-server: Display information about deprecated packages
• natskell: New Connect field