Hacker News with Generative AI: Haskell

Functors, Applicatives, and Monads (thecoder.cafe)
Hello! Today, we will explore functional programming with the concepts of functors, applicatives, and monads. We will discuss what they are and why they matter one step at a time. Note that all the examples will be in Haskell, but you’re not required to know Haskell to read this post.
Functional Programming, Haskell, Programming Concepts
84 points by abhi9u 7 days ago | 87 comments
Non-Obvious Haskell Idiom: Guard-Sequence (entropicthoughts.com)
Reading production Haskell code, we sometimes stumble over idioms that look confusing at first, but which show up frequently enough that they are worth learning. This is one of those examples, where we optionally return something with guard-sequence.
Haskell, Programming, Code Idioms, Functional Programming
38 points by todsacerdoti 15 days ago | 3 comments
Making a multiplayer action game in Haskell (gitlab.com)
You are about to add 0 people to the discussion. Proceed with caution.
Game Development, Haskell, Programming Languages
36 points by vortex_ape 19 days ago | 2 comments
(Haskell in Haskell) 2. Lexing – Cronokirby (cronokirby.com)
This is the second post in the Haskell in Haskell series.
Programming, Haskell, Computer Science
5 points by todsacerdoti 31 days ago | 0 comments
Show HN: Generating Random Art in Haskell (github.com/jamesma100)
Implementation of RandomArt based on the algorithm described in Hash Visualization: a New Technique to improve Real-World Security and Andrej Bauer's original program.
Programming, Haskell, Art, Security, Visualization
5 points by battle-racket 31 days ago | 0 comments
Understanding Yoneda (bartoszmilewski.com)
You don’t need to know anything about category theory to use Haskell as a programming language. But if you want to understand the theory behind Haskell or contribute to its development, some familiarity with category theory is a prerequisite.
Programming Languages, Category Theory, Haskell
5 points by thunderbong 45 days ago | 0 comments
Hyperbole: Haskell interactive serverside web framework inspired by Htmx, Elm (github.com/seanhess)
Create interactive HTML applications with type-safe serverside Haskell. Inspired by HTMX, Elm, and Phoenix LiveView
Haskell, Web Frameworks, Server-Side Programming, Functional Programming, Web Development
32 points by todsacerdoti 72 days ago | 0 comments
A Proper x86 Assembler in Haskell Using the Escardó-Oliva Functional (vmchale.com)
Writing an assembler turns out to be an interesting example: one needs to calculate distances between jumps and their target labels, and the target may appear after the label. It turns out that one can write a one-pass assembler using the tardis monad or in Curry, using logic programming.
Programming Languages, Haskell, Assemblers, Functional Programming
90 points by Smaug123 74 days ago | 19 comments
Haskell: A Great Procedural Language (entropicthoughts.com)
There are many catchphrases about Haskell.
Haskell, Programming Languages, Procedural Programming
280 points by kqr 75 days ago | 204 comments
An "oh fuck" moment in time (ghuntley.com)
Then took my kids down to the local pool. When I got back, I had a fully functional Haskell library with autogenerated C bindings, FFI to CoreAudio and my jaw was on the ground. Literally an "oh fuck" moment in time... This wasn't something that existed, it wasn't regurgitating knowledge from Stackoverflow. It was inventing/creating something new.
Programming, Artificial Intelligence, Haskell
88 points by ghuntley 80 days ago | 150 comments
GHC 9.12 and Cabal 3.14 releases (haskell.org)
To conclude the year 2024, the GHC and Cabal teams are happy to announce the releases of GHC 9.12 and cabal 3.14.
New Releases, Haskell, Software, Programming Languages
5 points by Vosporos 88 days ago | 1 comments
Overloading the lambda abstraction in Haskell (2022) (acatalepsie.fr)
Functional Programming, Haskell, Programming Languages
69 points by 082349872349872 97 days ago | 15 comments
Effectful – Build Fast and Reliable Haskell Applications (haskell-effectful.github.io)
Build Fast & Reliable Haskell Applications
Haskell, Programming Languages, Libraries, Software Development
12 points by todsacerdoti 107 days ago | 2 comments
Compiler Bootstrapping: Ben Lynn on "MacGyver's Haskell Compiler" [video] (youtube.com)
Compiler Bootstrapping, Programming Languages, Haskell, Computer Science, Videos
4 points by transpute 113 days ago | 0 comments
8 months of OCaml after 8 years of Haskell in production (2023) (chshersh.com)
I’ve been using Haskell in production for 8 years. I’ve been using OCaml in production for 8 months.
Programming Languages, Haskell, OCaml
264 points by droideqa 122 days ago | 277 comments
Eventually consistent plain text accounting (tylercipriani.com)
Over the past six months, I’ve tracked my money with hledger—a plain text double-entry accounting system written in Haskell. It’s been surprisingly painless.
Accounting, Finance, Software, Haskell
74 points by thcipriani 142 days ago | 28 comments
Functors to Monads: A Story of Shapes (jle.im)
For many years now I’ve been using a mental model and intuition that has guided me well for understanding and teaching and using functors, applicatives, monads, and other related Haskell abstractions, as well as for approaching learning new ones.
Functional Programming, Haskell, Software Development
41 points by JNRowe 150 days ago | 7 comments
Unix core utilities implemented in Haskell (github.com/Gandalf-)
Unix core utilities implemented in Haskell.
Programming, Haskell, Unix
243 points by ocean_moist 156 days ago | 95 comments
Namespaced De Bruijn Indices (haskellforall.com)
In this post I share a trick I use for dealing with bound variables in Dhall that I thought might be useful for other interpreted programming languages.
Programming, Haskell, Functional Programming, Dhall
8 points by fanf2 160 days ago | 0 comments
A dictionary of single-letter variable names (jackkelly.name)
Haskell’s expressive type system means that type signatures can carry a lot of information. Haskell’s polymorphism means that you sometime write a function that works across an enormous range of types, and are often left wondering “what do I actually call my variables?”. It is often the case that there’s nothing to say beyond “this variable is a Functor”, or “this variable is a monadic action”, and so a single-letter variable name is appropriate.
Haskell, Programming Languages, Type Systems, Variable Names, Best Practices
110 points by todsacerdoti 174 days ago | 91 comments
Fast Haskell: Competing with C at parsing XML (2017) (chrisdone.com)
In this post we’re going to look at parsing XML in Haskell, how it compares with an efficient C parser, and steps you can take in Haskell to build a fast library from the ground up. We’re going to get fairly detailed and get our hands dirty.
Programming Languages, Haskell, Performance, XML, C
5 points by hyperbrainer 176 days ago | 0 comments
Gleam Is Pragmatic (drewolson.org)
I’ve spent the past several years working with functional programming languages in my free time – primarily Haskell and OCaml. I love both languages but also find aspects of each frustrating.
Functional Programming, Programming Languages, Haskell, OCaml
250 points by crowdhailer 179 days ago | 174 comments
Unicode shenanigans: Martine écrit en UTF-8 (poisson.chat)
On my feed aggregator haskell.pl-a.net, I occasionally saw posts with broken titles like this (from ezyang’s blog):
Unicode, Encoding, Programming, Haskell, Blogging
58 points by 082349872349872 180 days ago | 26 comments
Contributing to Haskell GHC (2023) [pdf] (ryanglscott.github.io)
Haskell, Programming Languages, Open Source, Software Development, Contributions
12 points by transpute 182 days ago | 0 comments
A Tour of Hell – Shell scripting Haskell dialect (chrisdone.com)
This set of slides sketches out the implementation of Hell, in technical detail. I do tend to switch between the slides, old code, and the present code, so bear with me. It's more about the ideas. If you want to see a complete implementation, the complete implementation of Hell is one file, which you can look through easily.
Programming, Haskell, Shell Scripting
139 points by kreyenborgi 186 days ago | 23 comments
Reflecting away from definitions in Liquid Haskell (tweag.io)
We’ve all been there: wasting a couple of days on a silly bug. Good news for you: formal methods have never been easier to leverage.
Programming, Haskell, Formal Methods
4 points by JNRowe 203 days ago | 0 comments
Why Haskell? (gtf.io)
Programming Languages, Haskell
433 points by mesaoptimizer 204 days ago | 591 comments
Haskell Postgres Stored Procedures (github.com/ed-o-saurus)
This project is a "procedural language" extension of PostgreSQL allowing the execution of code in Haskell within SQL code.
Haskell, PostgreSQL, Databases, Programming Languages, Extensions
57 points by runeks 206 days ago | 12 comments
Competitive Programming in Haskell: tree path decomposition (byorgey.github.io)
Competitive Programming, Haskell, Algorithms
7 points by JNRowe 238 days ago | 0 comments
Haskell MOOC (mooc.fi)
Haskell, Programming Languages, Education, Online Courses
6 points by LamarDavis 241 days ago | 1 comments