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Re:Scarf has moved away from Haskell on Friday July 10, 2026 @11:17AM (#48861120)
This is a good post. AI has changed the programming language trade-offs and, as someone running a company that uses both Haskell and Python, I hope that Haskell can adapt to this new era.

I would like to add one additional observation, since we have been using both Haskell and Python in production for a long time:

Haskell excels at platform work, while Python excels at product work.

Our infrastructure teams work in Haskell (and also Rust nowadays), while our product teams work in Python. This gives us the best of both worlds (in my opinion): fast and rock-solid infrastructure on the platform side, and fast development speed and quick iteration cycles on the product side.

This setup has worked well for years for us, but it remains to be seen how and if this is going to change as well in the new AI era.

Re:Ghostty – Terminal Emulator on Sunday March 01, 2026 @03:11PM (#47210204)
It does. See https://ghostty.org/docs/config/keybind/reference#toggle_qui...

This works on MacOS, and on Linux sometimes:

> On Linux, the quick terminal is only supported on Wayland and not X11, and only on Wayland compositors that support the wlr-layer-shell-v1 protocol. In practice, this means that only GNOME users would not be able to use this feature.

Re:Living cells may generate electricity from motion on Tuesday December 16, 2025 @10:19AM (#46289588)
Cells may generate their own electrical signals through microscopic membrane motions. Researchers show that active molecular processes can create voltage spikes similar to those used by neurons. These signals could help drive ion transport and explain key biological functions. The work may also guide the design of intelligent, bio-inspired materials.
Lots of interesting points here, e.g.

> We should distinguish between infrastructure code and application code. Often, the two areas need different languages, tools, and techniques. Sometimes, that’s the case even when we use the same language for both infrastructure and applications. The role of static typing should be increased.

The extra emissions come from several factors:

- cows need a lot of land. If you used that land for e.g. efficient crops instead (and if people ate that instead of all that beef) you would free up a lot of land which you could use for other things (say, plant trees for example)

- cows need to eat a lot of feed to produce 1 calorie of beef. It is much more efficient to produce 1 calorie of vegetables and let people eat those vegetables directly instead of having it go through a cow first

- cows emit a lot of methane

- deforestation to produce more feed (like e.g. soy) is indeed also a factor

Re:Why SQLite Uses Bytecode on Tuesday April 30, 2024 @09:32AM (#40210806)
No. The SQLite bytecode is much higher-level than the instruction set of a CPU.
Re:Church's λ-Calculus (2023) [pdf] on Saturday April 20, 2024 @10:13AM (#40097478)
You can learn the lambda calculus in a few hours.

If you read just the first page of the linked paper and work through a few examples, you will likely already know enough about it to read the book. It's really just like equational reasoning in mathematics.

I suspect that the actual cost to rebuild the bridge will be far higher than that. Initial estimates of large public works projects are virtually always too low, and actual costs can easily be 5-10 times higher.

There is a great book about this phenomenon (and how to avoid it) by Brent Flyvbjerg called "How Big Things Get Done".

Re:Deterministic simulation testing for a word processor on Sunday March 24, 2024 @10:51AM (#39807583)
I am really glad to see that deterministic simulation testing is getting more coverage on HN lately. It feels like the next step up from property-based testing and (coverage-based) fuzzing.

We have gotten a lot of good use out of property-based testing in Haskell (using QuickCheck) since it is easy to set up and can cover a lot of ground for which you would otherwise have to write a lot of testing code.

I think that techniques like this have the potential to dramatically change software for the better if more of our industry starts adopting them (and it feels as if this is happening more and more!).

Re:Mitchell reflects as he departs HashiCorp on Friday December 15, 2023 @09:56AM (#38654779)
Thank you for all the great products that you have created! Your vision on infrastructure has always been inspiring to me and you are one of the few engineers who has truly moved the field as a whole forward.
Re:Ask HN: Who is hiring? (December 2023) on Monday December 04, 2023 @10:27AM (#38518409)
Channable - https://www.channable.com | Utrecht, The Netherlands | ONSITE

Join one of the fastest growing scale-ups in the Netherlands. We currently have several open engineering positions to join our team in Utrecht. We are a young company with a strong engineering culture and some unique data problems, which we are solving for our customers.

You can read more about our work on our tech blog: https://www.channable.com/tech

Our Stack: Haskell, Python, JavaScript, TypeScript, Ember.js, React, PostgreSQL, Redis, Ansible, Terraform, Nix

We currently process more than 100 billion products per day and offer technically interesting and challenging work. We are looking for highly motivated and skilled engineers to join our team.

Open positions:

- Haskell Software Engineer - Infra team: https://jobs.channable.com/o/haskell-software-engineer-02-20...

- VP of Engineering: https://jobs.channable.com/o/vp-of-engineering

Re:Ask HN: Who is hiring? (September 2023) on Thursday September 07, 2023 @04:31PM (#37425142)
Channable - https://www.channable.com | Utrecht, The Netherlands | ONSITE

Join one of the fastest growing scale-ups in the Netherlands. We currently have several open engineering positions to join our team in Utrecht. We are a young company with a strong engineering culture and some unique data problems, that we are solving for our customers.

You can read more about our work on our tech blog: https://www.channable.com/tech

Our Stack: Haskell, Python, JavaScript, TypeScript, Ember.js, React, PostgreSQL, Redis, Ansible, Terraform, Nix

We currently process more than 100 billion products per day and offer technically interesting and challenging work. We are looking for highly motivated and skilled engineers to join our team.

Open positions:

- Haskell Software Engineer - Infra team: https://jobs.channable.com/o/haskell-software-engineer-3

- Machine Learning Engineer - AI team: https://jobs.channable.com/o/machine-learning-engineer-ai-te...

- Python Software Engineer - Infra team: https://jobs.channable.com/o/python-software-engineer-infras...

Re:Zenbleed on Monday July 24, 2023 @11:26AM (#36849540)
It allows the attacker to steal data like e.g. your (root) password.
Functional languages use recursion instead of for and while loops. Recursion is a more general mechanism that can be used to implement the equivalent of for and while loops.

So in short, functional programmers do not "hate" looping construct, but simply don't need them since you can use recursion instead (in practice you actually rarely use recursion directly, but instead use functions like map, fold, sum, etc. which are implemented recursively).

Ask HN: What are you using for Continuous Deployment (CD)?

We are currently working on supporting continuous deployments, but it seems that no suitable tools are available. We don't have particularly outlandish requirements, we want something that:- Can be triggered via a webhook or from a GitHub PR/comment - Can queue up multiple releases (of the same or different services) and deploy them in series - Flexibility (works not only with Kubernetes)So far...

( Read More... | 5 comments | 3 points | on HN )
We have a tech blog that has been on the HN front page several times in the past. We focus on writing in-depth technical articles about how we use Haskell, how we solve scaling issues, and about our open-source work.

You may find some inspiration there: https://www.channable.com/tech

Do you see any new challengers to PyTorch?
Re:Cachix 1.3: Nix uploads unleashed on Wednesday March 08, 2023 @10:00AM (#35069760)
Great news!

> Starting with Cachix v1.3, we’re enabling multipart uploads directly to storage.

I would be interested to hear more about the design of the new system.

E.g. does it make use of Cloudflare R2 for storage? How is authentication handled?

Would be great to hear more, if you can share!

We wrote a blog post on how Nix helps us solve some of the problems that we encountered with other package managers like e.g. apt and pip.

https://www.channable.com/tech/nix-is-the-ultimate-devops-to...

(It doesn't go very much in depth on the conceptual model, but touches on the the main ideas)

Thanks for the kind words @WJW, we are pretty proud of our engineering culture as well :)

We are unfortunately not looking for freelance assistance at the moment, but we regularly have Haskell Engineering positions open, so perhaps that will be interesting to you in the future.

This looks incredibly ambitious:

- There are no booleans in the language! Conditionals can still succeed or fail, but failure is defined as returning zero values and success is defined as returning one or more values.

- Verse uses a so-called 'lenient' evaluation strategy which is neither strict nor lazy, but somewhere in-between ("Everything is eventually evaluated, but only when it is ready")

- an expression does not evaluate to a value (like in Haskell), but instead to a sequence of zero or more values

- tries to bring functional logic programming into the mainstream

- Verse uses an effect system for I/O instead of monads

- A type in Verse is "simply a function". E.g. int is the identity function on integers, and fails otherwise

This all looks very mind-bending to me (in a good way). Perhaps Verse will one day be as influential for PL design as Haskell has been.

Re:Ask HN: Who is hiring? (December 2022) on Friday December 02, 2022 @04:29AM (#33828495)
Channable - https://www.channable.com | Utrecht, The Netherlands | ONSITE or Remote EU (in consideration)

Join one of the fastest growing scale-ups in the Netherlands. We currently have several open engineering positions to join our team in Utrecht. We are a young company with a strong engineering culture and some unique data problems, which we are solving for our customers.

You can read more about our work on our tech blog: https://www.channable.com/tech

Our Stack: Haskell, Python, JavaScript, TypeScript, Ember.js, React, PostgreSQL, Redis, Ansible, Terraform, Nix

We currently process more than 100 billion products per day and offer technically interesting and challenging work. We are looking for highly motivated and skilled engineers to join our team.

Open positions:

- Haskell Software Engineer: https://jobs.channable.com/o/haskell-software-engineer-3

- DevOps Engineer: https://jobs.channable.com/o/devops-engineer-3

- Python Software Engineer: https://jobs.channable.com/o/python-software-engineer-5

- Frontend Engineer: https://jobs.channable.com/o/frontend-developer-utrecht

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