Duy NG tduyng

Problem

I have a notebook connected to a port replicator. I want to use the build-in speakers and microfone and not the external ones. If I boot my notebook in my port replicator Ubuntu changes the devices to external.

Solution

Find your internal speaker

pactl list short sinks

Node.js Deployment

Steps to deploy a Node.js app to DigitalOcean using PM2, NGINX as a reverse proxy and an SSL from LetsEncrypt

1. Sign up for Digital Ocean

If you use the referal link below, you get $10 free (1 or 2 months) https://m.do.co/c/5424d440c63a

2. Create a droplet and log in via ssh

I will be using the root user, but would suggest creating a new user

SSH Cheat Sheet

This sheet goes along with this SSH YouTube tutorial

Login via SSH with password (LOCAL SERVER)

$ ssh [email protected]

Create folder, file, install Apache (Just messing around)

$ mkdir test

$ cd test

Perfect git environment on OS X

Global alias

Add the following to your ~/.bashrc:

alias g='git'

Branch auto-completion

Hidden classes in JavaScript and Inline Caching

Knowing how internals work is always a good. Pretty much for everything. Cars, trains, computers, you name it. It gives you an insight on what happens under the hood. You also act/react differently based on this knowledge.

As you might have guessed, it’s also true for web development. Knowledge of CSS transitions allows you to achieve better performance and not to use JavaScript in most cases. Knowledge of V8 internals allows you to write more performant JavaScript code. So let’s talk about V8 a little.

A little about V8

V8 is a JavaScript engine built by Google. Firefox built SpiderMonkey, Opera built Carakan and Microsoft built Chakra. One very important difference between V8 and other JavaScript engines is that V8 doesn’t generate any intermediate code. It compiles JavaScr

People

`:bowtie:`	😄 `:smile:`	😆 `:laughing:`
😊 `:blush:`	😃 `:smiley:`	☺️ `:relaxed:`
😏 `:smirk:`	😍 `:heart_eyes:`	😘 `:kissing_heart:`
😚 `:kissing_closed_eyes:`	😳 `:flushed:`	😌 `:relieved:`
😆 `:satisfied:`	😁 `:grin:`	😉 `:wink:`
😜 `:stuck_out_tongue_winking_eye:`	😝 `:stuck_out_tongue_closed_eyes:`	😀 `:grinning:`
😗 `:kissing:`	😙 `:kissing_smiling_eyes:`	😛 `:stuck_out_tongue:`

	var users = [{"user": "👩🏻‍💻"},{"user": "👨🏾‍💻"},{"user": "💃"},{"user": "👨🏻‍🎓"},{"user": "🧑🏻‍🏫"},{"user": "🦸‍♂️"},{"user": "🧟‍♂️"}];

	let resultDetails = users.map(user => {
	let mark = Math.random() * 100;
	user.mark = mark;
	return user
	});
	//for me resultDetails
	/*
	0: {user: "👩🏻‍💻", mark: 76.03572182106969}

	# Terminal Cheat Sheet

	pwd # print working directory
	ls # list files in directory
	cd # change directory
	~ # home directory
	.. # up one directory
	- # previous working directory
	help # get help
	-h # get help

	/*------------------------------------------
	Responsive Grid Media Queries - 1280, 1024, 768, 480
	1280-1024 - desktop (default grid)
	1024-768 - tablet landscape
	768-480 - tablet
	480-less - phone landscape & smaller
	--------------------------------------------*/
	@media all and (min-width: 1024px) and (max-width: 1280px) { }

	@media all and (min-width: 768px) and (max-width: 1024px) { }

	#
	# Install the MYSQL driver
	# gem install mysql2
	#
	# Ensure the MySQL gem is defined in your Gemfile
	# gem 'mysql2'
	#
	# And be sure to use new-style password hashing:
	# http://dev.mysql.com/doc/refman/5.0/en/old-client.html
	development: