Pablo Alejandro Costesich pcostesi

Simple automated GIT Deployment using GIT Hooks

Here are the simple steps needed to create a deployment from your local GIT repository to a server based on this in-depth tutorial.

How it works

You are developing in a working-copy on your local machine, lets say on the master branch. Most of the time, people would push code to a remote server like github.com or gitlab.com and pull or export it to a production server. Or you use a service like deepl.io to act upon a Web-Hook that's triggered that service.

Principles of Adult Behavior

Be patient. No matter what.
Don’t badmouth: Assign responsibility, not blame. Say nothing of another you wouldn’t say to him.
Never assume the motives of others are, to them, less noble than yours are to you.
Expand your sense of the possible.
Don’t trouble yourself with matters you truly cannot change.
Expect no more of anyone than you can deliver yourself.
Tolerate ambiguity.
Laugh at yourself frequently.

The Ultimate Unit Testing Cheat-sheet

Sinon Chai
Chai
Sinon

Get started with [Mocha] testing

Make a package.json file if you don't have one yet:

npm init
# just keep pressing enter.
# this will create the file `package.json`

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

const Article = require('../../../../app/models/article');

Those suck for maintenance and they're ugly.

	// UPDATE: In 2023, you should probably stop using this! The narrow version of Safari that
	// does not support `nomodule` is probably not being used anywhere. The code below is left
	// for posterity.

	/**
	* Safari 10.1 supports modules, but does not support the `nomodule` attribute - it will
	* load <script nomodule> anyway. This snippet solve this problem, but only for script
	* tags that load external code, e.g.: <script nomodule src="nomodule.js"></script>
	*
	* Again: this will not prevent inline script, e.g.:

	(incomplete)

	This question comes up often here. As a Windows systems engineer that transitioned into a "DevOps" systems engineer (this is a very contentious title, but "systems engineer that IS DevOps" doesn't have the same ring to it) over about a year, I'd like to start a living FAQ/guide on how to get into this game.

	I'm also posting it on Gist [here](https://gist.github.com/carlosonunez/83312c12f884444620a495ef60882945). I presume that I'll update that one more frequently.

	# Materials Required

	* A healthy love for learning (DevOps is very young and is evolving almost daily)
	* Patience with being the "dumb guy in the room"

	-- Capped collection of JSON blobs: (Use json for postgres 9.4 and below and jsonb for 9.5 and above)
	CREATE SEQUENCE circle_index START WITH 1 INCREMENT BY 1 MINVALUE 1 MAXVALUE 5 CACHE 1 CYCLE ;
	CREATE TABLE circle ( i integer PRIMARY KEY default nextval('circle_index') NOT NULL, tim timestamp DEFAULT current_timestamp NOT NULL, dat jsonb );

	INSERT INTO circle(i, dat) SELECT nextval('circle_index') as idx, '{"a":12345,"b":1}' AS val ON CONFLICT (i) DO UPDATE SET i=EXCLUDED.i, tim=DEFAULT, dat=EXCLUDED.dat;
	INSERT INTO circle(i, dat) SELECT nextval('circle_index') as idx, '{"a":12345,"b":2}' AS val ON CONFLICT (i) DO UPDATE SET i=EXCLUDED.i, tim=DEFAULT, dat=EXCLUDED.dat;
	INSERT INTO circle(i, dat) SELECT nextval('circle_index') as idx, '{"a":12345,"b":3}' AS val ON CONFLICT (i) DO UPDATE SET i=EXCLUDED.i, tim=DEFAULT, dat=EXCLUDED.dat;
	INSERT INTO circle(i, dat) SELECT nextval('circle_index') as idx, '{"a":12345,"b":4}' AS val ON CONFLICT (i) DO UPDATE SET i=EXCLUDED.i, tim=DEFAULT, dat=EXCLUDED.dat;
	INSER

	---
	METHOD 1

	This should roughly sort the items on distance in MySQL, and should work in SQLite.
	If you need to sort them preciser, you could try using the Pythagorean theorem (a^2 + b^2 = c^2) to get the exact distance.
	---
	SELECT *
	FROM table
	ORDER BY ((lat-$user_lat)(lat-$user_lat)) + ((lng - $user_lng)(lng - $user_lng)) ASC