Katherine Giron Pe kathgironpe

VSCode - ESLint, Prettier & Airbnb Setup

1. Install ESLint & Prettier extensions for VSCode

Optional - Set format on save and any global prettier options

2. Install Packages

npm i -D eslint prettier eslint-plugin-prettier eslint-config-prettier eslint-plugin-node eslint-config-node

Get ClamAV running on Mac OS X (using Homebrew)

The easiest way to get the ClamAV package is using Homebrew

$ brew install clamav

Before trying to start the clamd process, you'll need a copy of the ClamAV databases.

Create a freshclam.conf file and configure as so

k2pdfopt 다운로드

https://www.willus.com/k2pdfopt/download/

실행권한 부여

chmod u+x k2pdfopt

PDF문서 -> 킨들페이퍼화이트3용 문서로 변환

Elixir + Phoenix Framework + Guardian + JWT + Comeonin

Preparing environment

We need to generate secret key for development environment.

mix phx.gen.secret
# ednkXywWll1d2svDEpbA39R5kfkc9l96j0+u7A8MgKM+pbwbeDsuYB8MP2WUW1hf

Let's generate User model and controller.

WebSockets - An Introduction

WebSockets is a modern HTML5 standard which makes communication between client and server a lot more simpler than ever. We are all familiar with the technology of sockets. Sockets have been fundamental to network communication for a long time but usually the communication over the browser has been restricted. The general restrictions

The server used to have a permanent listener while the client (aka browser) was not designated any fixed listener for a more long term connection. Hence, every communication was restricted to the client demanding and the server responding.
This meant that unless the client requested for a particular resource, the server was unable to push such a resource to the client.
This was detrimental since the client is then forced to check with the server at regular intervals. This meant a lot of libraries focused on optimizing asynchronous calls and identifying the response of asynchronous calls. Notably t

Phoenix 1.4 ships with exciting new features, most notably with HTTP2 support, improved development experience with faster compile times, new error pages, and local SSL certificate generation. Additionally, our channel layer internals receiveced an overhaul, provided better structure and extensibility. We also shipped a new and improved Presence javascript API, as well as Elixir formatter integration for our routing and test DSLs.

This release requires few user-facing changes and should be a fast upgrade for those on Phoenix 1.3.x.

Install the new phx.new project generator

The mix phx.new archive can now be installed via hex, for a simpler, versioned installation experience.

To grab the new archive, simply run:

Here is a high level overview for what you need to do to get most of an Android environment setup and maintained.

Prerequisites (for Homebrew at a minimum, lots of other tools need these too):

XCode is installed (via the App Store)
XCode command line tools are installed (xcode-select --install will prompt up a dialog)
Java

Install Homebrew:

	// Unfollow everyone on twitter.com, by Jamie Mason (https://twitter.com/fold_left)
	// https://gist.github.com/JamieMason/7580315
	//
	// 1. Go to https://twitter.com/YOUR_USER_NAME/following
	// 2. Open the Developer Console. (COMMAND+ALT+I on Mac)
	// 3. Paste this into the Developer Console and run it
	//
	// See this tweet by @jacknotlittle for a video showing you how to do it;
	// https://twitter.com/jacknotlittle/status/1387471283525459969
	//

	http://stackoverflow.com/questions/22667401/postgres-json-data-type-rails-query
	http://stackoverflow.com/questions/40702813/query-on-postgres-json-array-field-in-rails

	#payload: [{"kind"=>"person"}]
	Segment.where("payload @> ?", [{kind: "person"}].to_json)

	#data: {"interest"=>["music", "movies", "programming"]}
	Segment.where("data @> ?", {"interest": ["music", "movies", "programming"]}.to_json)
	Segment.where("data #>> '{interest, 1}' = 'movies' ")
	Segment.where("jsonb_array_length(data->'interest') > 1")

	# Selection sort (very slow on large lists)

	a = [9,8,6,1,2,5,4,3,9,50,12,11]
	n = a.size - 1

	n.times do \|i\|
	index_min = i

	(i + 1).upto(n) do \|j\|
	index_min = j if a[j] < a[index_min]