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

• 8 months of OCaml after 8 years of Haskell in production by Dmitrii Kovanikov

  I’ve been using Haskell in production for 8 years. I’ve been using OCaml in production for 8 months. It’s time to compare those two languages.

• Authentication and Standard Webhooks by Phil Curzon

  There are dozens of potential authentication service providers who you can go to to get something off the shelf: Auth0, Clerk, Cognito, Firebase Auth, SuperTokens, etc. Throughout my career, I’ve worked at many companies that integrated with many of these suppliers but they were always a well established fixture of the technology stack: something that required learning particular APIs or particular support contacts rather than an evaluation of their individual merits and their pricing structures.

• GHC 9.8.4 is now available by Ben Gamari

  The GHC developers are happy to announce the availability of GHC 9.8.4.

• GHC 9.12.1-rc1 is now available by Zubin Duggal

  The GHC developers are very pleased to announce the availability of the release candidate for GHC 9.12.1.

• GHC API: Call for requirements by Facundo Domínguez

  I am pleased to announce that the Haskell Foundation and Tweag are resuming efforts to define a stable API for GHC, and that I will continue the work of Alexis King as coordinator of the initiative.

• Haskell for Dilettantes 18: Monads! by Tea Leaves

  You can never be too rich or, if talking about Haskell, spend too much time talking about Monads.

• Myth and truth in Haskell asynchronous exceptions by Kazu Yamamoto

  This article explains my best current practices on asynchronous exceptions in Haskell using the standard library - Control.Exception.

• The Haskell Unfolder Episode 37: solving Advent of Code 2024 day 4 by Andres Löh, Edsko de Vries

  In this episode of the Haskell Unfolder, we are going to try solving the latest problem of this year’s Advent of Code live.

Jobs

• Senior Haskell developer position with CentralApp by Ashesh Ambasta

  CentralApp is looking to hire senior Haskell developers remote or on-site within the EU. Experience with Nix is a plus.

In brief

• ClickHaskell: ClickHouse DBMS driver by Dmitry Kovalev

  My goal was to create a simple, efficient, maintainable, and easy-to-use client. I’ve put a lot of work into this project over the past year, and now I’m excited to share the results!

• Servant and a weirdness in Keycloak by Magnus Therning

  When writing a small tool to interface with Keycloak I found an endpoint that require the content type to be application/json while the body should be plain text.

Show & tell

• My new book, Pragmatic Type-Level Design, is now completed and released! by Alexander Granin

  As with my previous book, Functional Design and Architecture (Manning Publications, 2024), I aimed to provide a systematic guide on functional programming; this time it’s type-level programming. Curry-Howard correspondence, System F, Propositional Logic, type-level isomorphisms, cumulative universes—nothing like that in my book. It is academism-free, avoids math completely, and is approachable to mere developers like me who just want to build real applications using ready type-level solutions and approaches.

Call for participation

• ac-library-hs
• ClickHaskell: Implement query serialization for UUID ClickHouse type