Hung Vu hungtienvu

Setting Up WSL

Install A Distro:

Run the following in powershell as admin Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows-Subsystem-Linux
Install a distro (ex: Ubuntu 18.04 LTS - https://www.microsoft.com/store/apps/9N9TNGVNDL3Q)
Open your distro you installed via the start menu, let it setup
Update and upgrade

sudo apt-get update

Group Array of JavaScript Objects by Key or Property Value

Implementation

const groupBy = key => array =>
  array.reduce((objectsByKeyValue, obj) => {
    const value = obj[key];
    objectsByKeyValue[value] = (objectsByKeyValue[value] || []).concat(obj);
    return objectsByKeyValue;

JavaScript Bitwise Hacks

It assumes the highest positive signed 32-bit float value for numbers. In other words, 2147483647 (or 0x7FFFFFFF or 2^31-1).

What is a Regular Expression?

A regular expression is a sequence of characters that forms a search pattern. The search pattern can be used for text search and text replace operations.

When you search for data in a text, you can use this search pattern to describe what you are searching for. A regular expression can be a single character, or a more complicated pattern. Regular expressions can be used to perform all types of text search and text replace operations.

String Modifiers

Brief notes on Meteor for CS 294-101. Many of the key architectural ideas in Meteor are described at https://www.meteor.com/projects.

BSD as example of great system design. Application primitives: processes run by a scheduler, sockets, sys calls, virtual memory, mbufs. What makes something a platform. Unix vs Multics.
History of application architectures. Mainframes (e.g. IBM 360 / 3270), client-server (e.g. Win32), web (e.g. LAMP), cloud-client. Oscillation of where the software runs. Thin vs thick clients, data vs presentation on the wire. Changes driven by massive forces (cheap CPUs, ubiquitous internet, mobile). New architecture for each era.
What it takes to make modern UI/UX. Mobile. Live updating. Collaboration. No refresh button. All drive the need for “realtime” or “reactive” system. Very different from HTTP era.
Four questions: 1 — how do we move data around; 2 — where does it come from; 3 — where do we put it; 4 — how do we use it?

Stevey's Google Platforms Rant

I was at Amazon for about six and a half years, and now I've been at Google for that long. One thing that struck me immediately about the two companies -- an impression that has been reinforced almost daily -- is that Amazon does everything wrong, and Google does everything right. Sure, it's a sweeping generalization, but a surprisingly accurate one. It's pretty crazy. There are probably a hundred or even two hundred different ways you can compare the two companies, and Google is superior in all but three of them, if I recall correctly. I actually did a spreadsheet at one point but Legal wouldn't let me show it to anyone, even though recruiting loved it.

I mean, just to give you a very brief taste: Amazon's recruiting process is fundamentally flawed by having teams hire for themselves, so their hiring bar is incredibly inconsistent across teams, despite various efforts they've made to level it out. And their operations are a mess; they don't real

	:root {
	--dark0: #2e3440;
	--dark1: #3b4252;
	--dark2: #434c5e;
	--dark3: #4c566a;

	--light0: #d8dee9;
	--light1: #e5e9f0;
	--light2: #eceff4;

	<!DOCTYPE html>
	<html>
	<body>
	<br>

	<h2>Thank you for your order {{ order.full_name }}</h2>
	<h3>Your Order ID: {{ order.short_uuid }}</h3>


	<h3>Shipping Details:</h3>

	syntax on
	set ruler " Show the line and column numbers of the cursor.
	set formatoptions+=o " Continue comment marker in new lines.
	set textwidth=0 " Hard-wrap long lines as you type them.
	set modeline " Enable modeline.
	set esckeys " Cursor keys in insert mode.
	set linespace=0 " Set line-spacing to minimum.
	set nojoinspaces " Prevents inserting two spaces after punctuation on a join (J)
	" More natural splits
	set splitbelow " Horizontal split below current.