R o m u l l o hiukky

The easiest way to bundle a simple TypeScript web application

Packaging JavaScript applications can be a bit overwhelming. The popular project uglifyjs does not support ES6, it is cumbersome to configure the allmighty Webpack, bundlers like Parcel and Microbundle still have bugs or do not compile to ESM bundles that work in a browser. It is hard to figure out the best way to bundle an application.

Here I give a small example, how we achieve the goal using the

TypeScript compiler
rollup.js bundler
terser mangler

Arch Linux Installation Guide

This guide will show step-by-step how to Install Arch Linux on UEFI mode.

Primitive Types & Reference Types in JavaScript

An explanation of JavaScript's pass-by-value, which is unlike pass-by-reference from other languages.

Facts

JavaScript has 2 kinds of variable types: primitive and reference.
A fixed amount of memory is reserved after creation of every variable.
When a variable is copied, it's in-memory value is copied.
Passing a variable to a function via a call also creates a copy of that variable.

Primitive Types

Renew GPG key

Given that your key has expired.

$ gpg --list-keys
$ gpg --edit-key KEYID

Use the expire command to set a new expire date:

Please retweet if this helps you!

Features

🔥 Blazing fast builds
😇 CommonJS bundle
🌲 .mjs bundle
✨ .d.ts bundle + type-checking
🧐 Source maps

i3 Window Manager Cheat Sheet

$mod refers to the modifier key (alt by default)

General

startx i3 start i3 from command line
$mod+<Enter> open a terminal
$mod+d open dmenu (text based program launcher)
$mod+r resize mode ( or to leave resize mode)
$mod+shift+e exit i3

Docker Commands, Help & Tips

Show commands & management commands

$ docker

Docker version info

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

-E: will describe the underlaying queries of the \ commands (cool for learning!)
-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

	export type Class = new (...args: any[]) => any;

	export function DisposableMixin<Base extends Class>(base: Base) {
	return class extends base {
	isDisposed: boolean = false;
	dispose() {
	this.isDisposed = true;
	}
	};
	}