David J. Kordsmeier truedat101

Coalton: Why is the interop not easier, and why might it be necessary for Coalton to be an entire language in itself?

If you came here searching for the context in which some reddit comments were written, you might want to check out this previous version of the article.

Several blog posts have been written about Coalton, about how it can be useful and what it brings to the table. However, to me, it hasn’t been clear why Coalton is the way to solve the problems that it does solve. Isn’t a simpler solution possible without making a full embedded language, and giving users the cognitive overhead of thinking about interop between normal lisp and coalton?

I have been thinking about this for a while as one of my pasttimes, and below I’ll summarize the better reasons why coalton might be the way it is. Perhaps, I couldn’t se

Can be used for streaming data (webcam or screen capture) from the Windows to WSL

Install

Get the internal IP of WSL

Run from a WSL terminal

ip route list default | awk '{print $3}'

Tutorial: Debugging MQTT traffic flows in IOTstack

You have built an ESP32, ESP8266 or similar project. You are sure it is sending payloads via MQTT but the data doesn't seem to be arriving in Node-Red. You're at a bit of a loss as to what to do next.

This tutorial is specific to IOTstack where Mosquitto and Node-Red are running as Docker containers on a Raspberry Pi. Much of it is probably applicable to other environments but "your mileage may vary".

Related resources

IOTstack Mosquitto documentation

Then mathematical neatness became a goal and led to pruning some features from the core of the language.

— John McCarthy, History of Lisp

If you prefer programming languages with a tidy and tiny core, you're in for a treat. This article drills down to the singleton primitive at the heart of Raku's metamodel ("model of a model") of a model of computation ("how units of computations, memories, and communications are organized")¹.

The reason I've written this article

It began with u/faiface's reddit post/thread "I'm impressed with Raku"². One of their sentences in particular stood out for me:

Install OpenCV 4.10 with CUDA 12.6 and CUDNN 8.9 in Ubuntu 24.04

First of all install update and upgrade your system:

    $ sudo apt update
    $ sudo apt upgrade

Then, install required libraries:

	import {
	withAlpha,
	withoutAlpha,
	} from "SpectaclesInteractionKit.lspkg/Utils/color";

	/**
	* Enhanced 3D Line component with smooth spline interpolation
	* Creates a 3D tube by extruding a circular cross-section along a path defined by scene objects.
	*/
	@component

	import {
	withAlpha,
	withoutAlpha,
	} from "SpectaclesInteractionKit.lspkg/Utils/color";
	import InteractorLineRenderer, {
	VisualStyle,
	} from "SpectaclesInteractionKit.lspkg/Components/Interaction/InteractorLineVisual/InteractorLineRenderer";

	/**
	* This class provides visual representation for a spline curve through a series of control points.

	// Import required modules
	const WorldQueryModule = require("LensStudio:WorldQueryModule");

	const EPSILON = 0.01;

	/**
	* DirectionalWorldQuery
	*
	* A utility that performs world queries in a direction defined by two scene objects.
	* It can then project rays from a third object in that same direction.

	import Event from "SpectaclesInteractionKit/Utils/Event";

	const HOST = "wss://[APP_NAME].herokuapp.com";

	export class WebSocketConnection {
	private remoteServiceModule: RemoteServiceModule = require("LensStudio:RemoteServiceModule");
	private webSocket: WebSocket;

	private onMessageEvent = new Event<WebSocketMessageEvent>();
	public readonly onMessage = this.onMessageEvent.publicApi();

	/*
	This example code is in the Public Domain (or CC0 licensed, at your option.)
	Unless required by applicable law or agreed to in writing, this
	software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
	CONDITIONS OF ANY KIND, either express or implied.
	*/

	/****************************************************************************
	*
	* This file is for gatt server. It can send adv data, be connected by client.