Newsletter
Issue 153 2019-04-04
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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
-
GHC Infrastructure Update by Ben Gamari
Since November we have been quietly working behind the scenes to make this new infrastructure a reality; this has been a massive project and however I’m happy to say we are now emerging on the other side and we are very happy with the result.
-
Extending the Persistent QuasiQuoter by Matt Parsons
The QuasiQuoter does a ton of stuff for you. In this post, we’re going to learn how to make it work for you!
-
GHC, Alpine, Stack, and Docker by Joe Kachmar
This repository is a small demonstration of the steps required to build an Alpine Linux Docker image with all the tools necessary to compile Haskell programs linked against musl libc.
-
Haskell coreutils -
cat
by AustinI’ve implemented a couple Unix core utilities in Haskell, and want to start a series of posts going through the details - starting with simple programs like
cat
. -
Hierarchies In a Hakyll Blog by Artem Chernyak
Hakyll didn’t support this out of the box, and I didn’t find examples of anyone using similar layouts. So, I created my own approach which I am now sharing.
-
How to use Foreign Function Interface with Stack: Part I by Samuel Barr
I had previously written this functionality in C for a school project. I had heard of Haskell’s function interface before, and figured this would be a good opportunity to learn it.
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Idempotent Applicatives, Parametricity, and a Puzzle by Daniel Mlot
Some applicative functors are idempotent, in the sense that repeating an effect is the same as having it just once. An example and a counterexample are Maybe and IO, respectively.
-
Nanosmos: Writing a simple text-editor with brick by Tom Sydney Kerckhove
In this post we will write a simple purely functional text editor using brick, building on the previous single-line text editor: picosmos.
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Parsing JSON with more context by Benjamin Esham
Sometimes a library wants you to produce a value of type
t
, but you’d like to have a value of typee
available when you do that and the API doesn’t offer a way to inject ane
in the right place. -
The Compose Newtype and its Applicative Instance by Florian Beeres
This post will give you a quick overview of the
Compose
data type and then explain how the applicative instance for that type works.
Jobs
In brief
- Applicative
- Building a Bigger World
dynamic
: dynamically typed programming made easy- Finding Success (and Failure) in Haskell
- Idiomatic monads in Rust
- Monthly Hask Anything (April 2019)
- Proving Addition is Commutative in Haskell using Singletons
salak
: Configuration (re)loader in Haskell.- You Don’t Need to Be Brilliant to Do Brilliant Work
Package of the week
This week’s package of the week is slist
, a package that implements the Slist
data structure which stores the size of the list along with the list itself.
Call for participation
Events
North America
- 2019-04-04 in Raleigh, NC, USA by Raleigh Haskell Meetup: (hack . yack)
- 2019-04-04 in Las Vegas, NV, USA by Las Vegas Functional Programming User Group: Functional Programming Meetup
- 2019-04-04 in Portland, OR, USA by Portland Functional Programming Study Group: PDX Func Theory Track - Logic and Proof
- 2019-04-06 in San Diego, CA, USA by San Diego Software Development Deep Dive: Diving deeper into software development discussions
- 2019-04-06 in Boston, MA, USA by Weekly Functional Programming Meetup: Hang out + short talk (Categories of Optics by Ammar Husain)
- 2019-04-06 in Berkeley, CA by Code Self Study: Open Programming Session (Saturday Afternoon)
- 2019-04-08 in Irvine, CA by Orange Combinator - Functional Programming In OC: Combinating - The Weekly Function
- 2019-04-08 in Pittsburgh, PA, USA by Pittsburgh Functional Programming Meetup: Language tour: Kotlin
- 2019-04-09 in San Diego, CA, USA by San Diego Clojurians: Inaugural meeting of the San Diego Clojure Meetup hosted by Functional Works
- 2019-04-09 in Vancouver, BC, Canada by Functional Programming Vancouver: Functional Programming Meetup
- 2019-04-09 in Denver, CO, USA by DenverFP: ReasonML: Hands-on Introduction (REPL Examples)
- 2019-04-10 in Berkeley, CA by Code Self Study: Open Programming Session (Wednesday, Berkeley)
- 2019-04-10 in Tucson, AZ, USA by Tucson Functional Programmers: Monthly Get Together
- 2019-04-10 in Toronto, ON, Canada by Toronto Haskell Meetup: Haskell Meetup: Reader and ReaderT Workshop
- 2019-04-10 in New York, NY, USA by New York Haskell Users Group: HAMTs From Scratch with Vaibhav Sagar
- 2019-04-11 in Calgary, AL, Canada by Functional Programmers YYC: Unconf (YYC.FP)
Europe
- 2019-04-04 in London, United Kingdom by Skills Matter - X Matters Keynote Series - Developer Events: Skills Matter - F# eXchange 2019
- 2019-04-05 in Warszawa, Poland by Monadic Warsaw: Monadic Warsaw #20 - Hackathon
- 2019-04-06 in Iași, Romania by Iasi Functional Programming: Functional Programming: A story about Cats, Types and Typeclasses
- 2019-04-07 in Göteborg, Sweden by Got.λ - Göteborg Functional Programming Group: Smart Testing with a functional approach (foss-north Community Day event)
- 2019-04-08 in București, Romania by Bucharest FP: Bucharest FP #48 — Haskell Book Study Group 09
- 2019-04-08 in Delft, Netherlands by Delft Haskell Study Group: Haskell Study Session #7
- 2019-04-09 in Newcastle Upon Tyne, United Kingdom by Functional Programming North East: Immutable Data, Lenses, and Pac-man
- 2019-04-09 in Bucharest, Romania by Bucharest FP: Bucharest FP #49 — Rust and Functional Programming in Practice
- 2019-04-10 in Prague, Czech Republic by Prague Lambda Meetup: Clojure Wednesday
- 2019-04-10 in Bristol, United Kingdom by Bristol Clojurians: Clojure Study Group
- 2019-04-11 in Köln, Germany by Scala User Group Köln Bonn: Pure FP: die letzte Meile
- 2019-04-11 in London, United Kingdom by Hoodlums: Hoodlums Meetup
Africa
- 2019-04-08 in Sandton, South Africa by Lambda Luminaries: Functional Mob Programming
Oceania
- 2019-04-09 in Brisbane, Australia by Brisbane Functional Programming Group (BFPG): YOW Night - Functional Architecture with Jed Wesley-Smith
South America
- 2019-04-10 in Santiago, Chile by Santiago Scala Meetup: Santiago Scala Meetup
Asia
- 2019-04-11 in Taipei, Taiwan by Functional Thursday: Functional Thursday #72 (遇連假,順延一週)