lionel-rowe’s gists

y21 / vm2.js

Last active April 6, 2023 07:16

vm2

	const {NodeVM} = require('vm2');
	const {isMainThread, Worker, parentPort} = require('worker_threads');

	if (isMainThread) {
	const worker = new Worker(__filename);

	let lastMessage = null;

	worker.on('message', () => lastMessage = Date.now());
	worker.on('online', () => lastMessage = Date.now());

tigt / git-branch-to-favicon.js

Created March 18, 2020 21:10

Creates an SVG string that can be used as a favicon across different Git branches. Actually getting this into the browser is sadly project-specific.

	const { execSync } = require('child_process')
	const { createHash } = require('crypto')
	const invertColor = require('invert-color')

	const branchName = execSync('git rev-parse --abbrev-ref HEAD')
	const hash = createHash('sha256')
	hash.update(branchName)
	const color = '#' + hash.digest().toString('hex').substring(0, 6)
	const invertedColor = invertColor(color, true)

creationix / BaseBee.js

Last active June 1, 2025 15:44

This is a base 80 encoding that uses the 40 characters (upper and lower case) of the deseret alphabet invented by pioneers in the mid 1800s. It's not a very useful encoding since it's less efficient than base-16. But it is a pretty fun unicode test since these are high enough in the unicode space to require surrogate pairs in JavaScript.

	// 𐐜𐐮𐑅 𐐮𐑆 𐐩 𐐺𐐩𐑅 80 𐐯𐑌𐐿𐐬𐐼𐐮𐑍 𐑄𐐰𐐻 𐐲𐑅𐐲𐑆 𐑄 40 𐐿𐐰𐑉𐐮𐐿𐐻𐐲𐑉𐑆 (𐐲𐐹𐐲𐑉 𐐰𐑌𐐼 𐑊𐐵𐐲𐑉 𐐿𐐩𐑅)
	// 𐐲𐑂 𐑄 𐐼𐐯𐑅𐐨𐑉𐐯𐐻 𐐰𐑊𐑁𐐰𐐺𐐯𐐻 𐐮𐑌𐑂𐐯𐑌𐐻𐐲𐐼 𐐺𐐴 𐐒𐑉𐐮𐑀𐐲𐑋 𐐏𐐲𐑍 𐐮𐑌 𐑄 𐑋𐐮𐐼 1800𐐯𐑅.

	// 𐐆𐐻 𐐮𐑆 𐑌𐐪𐐻 𐐩 𐑂𐐯𐑉𐐨 𐐷𐐭𐑅𐑁𐐲𐑊 𐐯𐑌𐐿𐐬𐐼𐐮𐑍 𐑅𐐮𐑌𐑅 𐐮𐐻 𐐮𐑆 𐐲𐐺𐐵𐐻 𐐰𐑆 𐐮𐑁𐐮𐑇𐐲𐑌𐐻 𐐰𐑆 𐐺𐐩𐑅
	// 16. 𐐒𐐲𐐻 𐐮𐐻 𐐮𐑆 𐐩 𐐹𐑉𐐮𐐻𐐨 𐑁𐐲𐑌 unicode 𐐻𐐯𐑅𐐻 𐑅𐐮𐑌𐑅 𐑄𐐨𐑆 𐐪𐑉 𐐸𐐴 𐐮𐑌𐐲𐑁 𐐮𐑌 𐑄
	// unicode 𐑅𐐹𐐩 𐐻𐐭 𐑉𐐮𐐿𐐶𐐴𐐲𐑉 𐑅𐐲𐑉𐐲𐑀𐐩𐐻 𐐹𐐯𐑆 𐐮𐑌 𐐖𐐪𐑂𐐲𐐝𐐿𐑉𐐮𐐹𐐻.

	let 𐐔𐐯𐑅𐐨𐑉𐐯𐐻 = '𐐀𐐁𐐂𐐃𐐄𐐅𐐆𐐇𐐈𐐉𐐊𐐋𐐌𐐍𐐎𐐏𐐐𐐑𐐒𐐓𐐔𐐕𐐖𐐗𐐘𐐙𐐚𐐛𐐜𐐝𐐞𐐟𐐠𐐡𐐢𐐣𐐤𐐥𐐦𐐧' +
	'𐐨𐐩𐐪𐐫𐐬𐐭𐐮𐐯𐐰𐐱𐐲𐐳𐐴𐐵𐐶𐐷𐐸𐐹𐐺𐐻𐐼𐐽𐐾𐐿𐑀𐑁𐑂𐑃𐑄𐑅𐑆𐑇𐑈𐑉𐑊𐑋𐑌𐑍𐑎𐑏';
	export function 𐐒𐐩𐑅𐐒𐐨(𐐤𐐲𐑋𐐺𐐲𐑉) {

blixt / prng.js

Last active March 30, 2025 04:16

A very simple, seedable JavaScript PRNG. NOTE: Please read comments on why this is not a good choice.

	// NOTICE 2020-04-18
	// Please see the comments below about why this is not a great PRNG.

	// Read summary by @bryc here:
	// https://github.com/bryc/code/blob/master/jshash/PRNGs.md

	// Have a look at js-arbit which uses Alea:
	// https://github.com/blixt/js-arbit

	/**

kylefox / liquid-mode.js

Created November 11, 2011 00:02

Liquid syntax highlighting for CodeMirror.

	/*
	This overlay provides a 'liquid' mode to the excellent CodeMirror editor (http://codemirror.net/).
	Add something like this to your CSS:

	.cm-liquid-tag {
	color: #32273f;
	background: #ead9ff;
	}

	.cm-liquid-variable {