Amio Jin amio

Note:

When this guide is more complete, the plan is to move it into Prepack documentation.
For now I put it out as a gist to gather initial feedback.

A Gentle Introduction to Prepack (Part 1)

If you're building JavaScript apps, you might already be familiar with some tools that compile JavaScript code to equivalent JavaScript code:

Babel lets you use newer JavaScript language features, and outputs equivalent code that targets older JavaScript engines.

This content moved here: https://exploringjs.com/impatient-js/ch_arrays.html#quickref-arrays

Updated: 2022-07

Raspberry Pi-Hole VPN Setup

I wrote the first edition of this as a guide for myself at the end of 2017 - it was a mashup of Pi-Hole + PiVPN scripts and an IPsec script installed within a separate Raspian Docker image... and it actually worked!

But things have come a long way, and WireGuard happened - I've since streamlined and simplified my setup into a single Docker Compose script.

The steps below assume the following:

This is a proposal for lightning talk at Reactive Conf. Please 🌟 this gist to push the proposal!

Memory Leak Testing in 2017

Hi, I am Andy, creator of leakage - the node-powered memory leak testing library.

Instead of manual debugging it provides a structured approach to fix or even prevent memory leaks.

What I Wish I'd Known About Equity Before Joining A Unicorn

Disclaimer: This piece is written anonymously. The names of a few particular companies are mentioned, but as common examples only.

This is a short write-up on things that I wish I'd known and considered before joining a private company (aka startup, aka unicorn in some cases). I'm not trying to make the case that you should never join a private company, but the power imbalance between founder and employee is extreme, and that potential candidates would

Not all random values are created equal - for security-related code, you need a specific kind of random value.

A summary of this article, if you don't want to read the entire thing:

Don't use Math.random(). There are extremely few cases where Math.random() is the right answer. Don't use it, unless you've read this entire article, and determined that it's necessary for your case.
Don't use crypto.getRandomBytes directly. While it's a CSPRNG, it's easy to bias the result when 'transforming' it, such that the output becomes more predictable.
If you want to generate random tokens or API keys: Use uuid, specifically the uuid.v4() method. Avoid node-uuid - it's not the same package, and doesn't produce reliably secure random values.
If you want to generate random numbers in a range: Use random-number-csprng.

You should seriously consider reading the entire article, though - it's

	// I'm tired of extensions that automatically:
	// - show welcome pages / walkthroughs
	// - show release notes
	// - send telemetry
	// - recommend things
	//
	// This disables all of that stuff.
	// If you have more config, leave a comment so I can add it!!

	{

	#!/bin/bash
	set -eu

	SYSCTL_FILE=/etc/sysctl.d/90-tcp-bbr.conf

	# check root
	if [[ $EUID -ne 0 ]]; then
	echo "This script must be run as root"
	exit 1
	fi

	const fs = require('fs');
	const webpack = require('webpack');
	const { send } = require('micro');
	const config = require('./webpack.config');
	const webpackMiddleware = require('webpack-dev-middleware');
	const webpackHotMiddleware = require('webpack-hot-middleware');

	const compiler = webpack(config);
	const middleware = (next) => {
	const mw = webpackMiddleware(compiler, {

	import { createCipheriv, createDecipheriv, randomBytes } from "crypto";

	const ENCRYPTION_KEY: string = process.env.ENCRYPTION_KEY \|\| ""; // Must be 256 bits (32 characters)
	const IV_LENGTH: number = 16; // For AES, this is always 16

	/**
	* Will generate valid encryption keys for use
	* Not used in the code below, but generate one and store it in ENV for your own purposes
	*/
	export function keyGen() {