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Antonym List

Note: The table headings (positive/negative) are not necessarily meaningful.

Positive	Negative
`acquire`	`release`
`add`	`remove` (e.g. an item), `subtract` (arithmetic)
`advance`	`retreat`
`allocate`	`deallocate` (correct), `free` (common)
`allow`	`deny`

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

General rules

Follow standard conventions.
Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
Boy scout rule. Leave the campground cleaner than you found it.
Always find root cause. Always look for the root cause of a problem.

Design rules

Computer Graphics Programming Resources

List of freely available resources to study computer graphics programming.

Getting Started

Graphics Programming – Where To Start? Article
What Is A Graphics Programmer? Video
Self-Starting As A 3D Graphics Programmer Video
How Do I Become a Graphics Programmer? Article
How to Start Learning Computer Graphics Programming Article

Recipe: from MQTT to InfluxDB via Node-Red

2023-12-02 revise graphics to correspond with InfluxDB-in node, and explain the pros and cons of InfluxDB 1.8 vs InfluxDB 2.

Introduction

Getting data produced by IoT sensors into a database is practically a mandatory step before effective visualisation (eg dashboards).

This recipe shows you how to get an MQTT payload into an InfluxDB database using three Node-Red nodes. It makes the following assumptions:

Attempt at a hardened one on OpenBSD on Vultr

Upload install.iso for OpenBSD to Vultr, create a new VM using the ISO. You need the ISO to create full disk encryption. Also this eliminates any potential security issues cloud-init can cause.
Set a full disk encryption key, set a root password that is strong, set a user that doesn't match anyone's name with a good password.
Start sshd by default, don't allow root logins.
Install the entire system to a single / partition (for disk usage reasons)

Each time the VM boots, someone will need to manually enter the encryption key at the prompt.

Initial setup: enable doas, change SSH port, pubkey auth only

	/**
	* HOWTO: Copy whole file, open devtools on page (F12 / Ctrl + Shift + i) and paste it into the console
	* Chrome might ask you to allow downloading multiple images.
	*/

	// credits for forceDownload: https://stackoverflow.com/a/49886131/8463645
	function forceDownload(url, fileName){
	var xhr = new XMLHttpRequest();
	xhr.open("GET", url, true);
	xhr.responseType = "blob";

	#!/usr/bin/env bash

	set -e

	die() {
	echo "$1";
	exit 1;
	}

	# Fetch and install LuaJIT/LuaRocks into the local directory

	local spaces = require("hs.spaces") -- https://github.com/asmagill/hs._asm.spaces

	-- Switch kitty
	hs.hotkey.bind({'command'}, 'escape', function () -- change your own hotkey combo here, available keys could be found here:https://www.hammerspoon.org/docs/hs.hotkey.html#bind
	local BUNDLE_ID = 'net.kovidgoyal.kitty' -- more accurate to avoid mismatching on browser titles

	function getMainWindow(app)
	-- get main window from app
	local win = nil
	while win == nil do

	# Visual Studio Environemnt Loader
	#
	# For MSYS2/Cygwin/etc..
	#
	# Set the following in your ~/.bashrc:
	#
	# ENVIRONMENT CONFIGURATION:
	#
	# To enable static linking where possible:
	#

	/* example of use */
	h1:before {
	font-family: 'etModules';
	content: "\24";
	}

	/* codes */

	.arrow_up:before {
	content: "\21";