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The general term for this is an indexed type. Specifically what is shown here is indexed codata. Indexed data is more commonly known as generalized algebraic data types (GADTs), wh…

Writing the notes is more the point than re-reading them, at least for me. Writing stuff down forces me to kick things around and find a good structure, and that's where the useful…

A few comments on the previous abundance of cod, from https://www.sciencehistory.org/stories/magazine/a-tragedy-wi... In 1873, French novelist Alexandre Dumas wrote that if every e…

Very nice!

Scala's capture checking [1] is a modal type system. [1]: https://docs.scala-lang.org/scala3/reference/experimental/cc...

Good article. We really need more nuance in the discussion of using LLMs for SE. Not all tasks are the same; we shouldn't expect to use the same process across them! In my experien…

Good article. Not much to add to it, other than I think more people should look at modal type systems like found in Scala 3 and OxCaml. If you want safe arena allocation they are a…

You might enjoy digging into the world of effect handlers: it's a very neat model for expressing these features and boils down to continuations in the implementation.

These are not things I need to know :-)

A nice thing about being left handed is there a few things I can't get precious about. Fountain pens are never going to feature in my life as I'll just smudge everything. Similarly…

Can anyone explain how this works? Humans have 3 (sometimes 4) cones, so I thought that going beyond 3 primaries wouldn't increase the perceivable gamut. Update: thanks for all the…

Absolutely. Take a look at "unconscious perception".

A collection of thoughts I had while reading the article: 0. Overall, a nice article. 1. There are several places where the (LLM assisted?) writing is a bit odd. For example, the c…

There is no real evidence that we'll reach AGI any time soon. It relies on AI continuing to scale, and we have no proof that will continue to be possible. There is an alternative i…

The premise is "Artificial General Intelligence (AGI), a system that exhibits all the cognitive capabilities the brain has, is probably only a few short years away". If this is tru…

This blog post is very relevant to the discussion: https://www.persuasion.community/p/the-multiversity-is-finis... A quick summary: the modern university is really a "multiversity"…

Wow. Not a Haskell user, but a big user of other languages with expressive type systems (mostly Scala; some Rust). My experience is the complete opposite. I can't imagine using a l…

This is the book I'm working on about mental models for better code. It's getting very close to complete, and there is a 150 page free sample. The book is all about making explicit…

That's a reasonable way of looking at it, but capabilities are not restricted to low-level system properties. Here's a terminal UI system built around three main capabilities: - la…

You'd probably like the work of Tomas Petricek: https://tomasp.net/ He does research in "the history and philosophy of programming", amongst other things.

You're right, they are related. One difference is simply lineage. Capabilities come out of the erights / security world (e.g. [0]), while dependency injection comes from the XP / a…

What Zig is doing is called "capability passing". I don't know if the Zig team is aware of this field of work, or have independently arrived upon it, but that's what is achieved by…