Zellyn Hunter zellyn

💬 Is a CvRDT basically a semigro...

human (Sep 3, 2024, 01:35 PM)

Is a CvRDT basically a semigroup?

assistant (Sep 3, 2024, 01:35 PM)

That's an insightful question that touches on the intersection of distributed systems and abstract algebra. Let's break this down:

Understanding Linear Types: A Conceptual Explanation

human (Sep 3, 2024, 04:36 PM)

Can you ELI5 Linear Types? I'm particularly interested in:

a brief overview, detailed enough that I can "grok" them
examples of languages that have successfully implemented them and gained some real-world usage (if any)
how they might be incorporated into an otherwise simple language like Go or Hare

My current difficulty level is that I have a good conceptual overview-level understanding of Rust lifetimes, but haven't used them in anger. I deeply get the need, though: a C++ function that doesn't have a comment specifying what happens to ownership of the arguments is terrifying 🙂

Terminating Processes in the Terminal: Ctrl-C vs Ctrl-\

human (Aug 26, 2024, 03:54 PM)

When in my terminal, I've noticed that ctrl-\ seems to often work when ctrl-c won't. I used to use ctrl-z and then kill %+, but ctrl-\ appears to work in the same places that ctrl-z does. Can you explain to me what's going on? Why do they differ in when they work, and what signals are actually getting sent?

assistant (Aug 26, 2024, 03:54 PM)

You've made an astute observation about different ways to terminate processes in a Unix-like terminal. Let's break down what's happening with each of these commands and signals:

	bundlepi🐚 ~/gh/bundlepi main *+ bw run lenovo id
	› lenovo uid=0(root) gid=0(root) groups=0(root)
	i ╭────────┬─────────────┬────────╮
	i │ node │ return code │ time │
	i ├────────┼─────────────┼────────┤
	i │ lenovo │ 0 │ 0.219s │
	i ╰────────┴─────────────┴────────╯
	bundlepi🐚 ~/gh/bundlepi main *+ bw -d lock add lenovo
	[2023-07-12T08:31:19.257140] [DEBUG] invocation: /Users/zellyn/gh/bundlepi/.hermit/python/bin/bw -d lock add lenovo
	[2023-07-12T08:31:19.327744] [DEBUG] node lenovo gets its dummy attribute from: default

	rm -rf OpenEmulator-zellyn
	git clone https://github.com/zellyn/OpenEmulator-OSX.git OpenEmulator-zellyn
	cd OpenEmulator-zellyn
	git checkout iie
	git submodule update --init --recursive
	open OpenEmulator.xcodeproj

	package main

	import (
	"crypto/cipher"
	"crypto/des"
	"encoding/binary"
	"fmt"
	)

	var des3 cipher.Block

	* Starting development

	git clone [email protected]:zellyn/OpenEmulator-OSX.git
	git clone https://github.com/OpenEmulatorProject/OpenEmulator-OSX.git
	cd OpenEmulator-OSX
	git submodule init
	git submodule update
	# Cloning into '/Users/zellyn/gh/OpenEmulator-OSX/modules/libemulation'...
	# Fetched in submodule path 'modules/libemulation', but it did not contain 51bf1c4aa9fe689bb895a723cf0f1e3f0b8d2741. Direct fetching of that commit failed.
	cd modules/libemulation

	I cobbled together a (unix-specific, syscall-using) solution based on the
	stack overflow answer to the same question in python, and a previous post
	on this list. References inline.

	Note: this seems to work, but I haven't taken the time to really understand
	what I'm doing, and I welcome any suggestions or fixes.

	// https://groups.google.com/d/msg/golang-nuts/8o9fxPaeFu8/uSFYfobL5EgJ
	// http://go.pastie.org/813153