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`vs` Questions

http://stackoverflow.com/questions/804115 (rebase vs merge).
https://www.atlassian.com/git/tutorials/merging-vs-rebasing (rebase vs merge)
https://www.atlassian.com/git/tutorials/undoing-changes/ (reset vs checkout vs revert)
http://stackoverflow.com/questions/2221658 (HEAD^ vs HEAD~) (See git rev-parse)
http://stackoverflow.com/questions/292357 (pull vs fetch)
http://stackoverflow.com/questions/39651 (stash vs branch)
http://stackoverflow.com/questions/8358035 (reset vs checkout vs revert)

ASCI art characters for creating diagrams

Characters:

Single line

ASCII code 191 = ┐ ( Box drawing character single line upper right corner )
ASCII code 192 = └ ( Box drawing character single line lower left corner )
ASCII code 193 = ┴ ( Box drawing character single line horizontal and up )
ASCII code 194 = ┬ ( Box drawing character single line horizontal down )

[many tutorials]https://www.youtube.com/user/agosie/playlists

[from beginner to advanced] : https://www.youtube.com/watch?v=7nqM2P6vXb4&list=PLXjEkCD7CwxhaBdtzgnqaOVooUse0o2se

[From Beginner to advanced for Surpac 6.6.2+] : https://www.youtube.com/watch?v=YPBPIuUIIhg&list=PL_7hR7sVzPsLZrdcKX3bixt3zfZ2PhOxd

[modern tutorials] : https://www.youtube.com/watch?v=L2Y477QS8RY&list=PLeMIZhmqTIlCH_ZQJtNNRarqbvTRRlwEs

Docker compose as a systemd unit

Create file /etc/systemd/system/docker-compose@.service. SystemD calling binaries using an absolute path. In my case is prefixed by /usr/local/bin, you should use paths specific for your environment.

[Unit]
Description=%i service with docker compose
PartOf=docker.service
After=docker.service

Conceitos fundamentais de linguagens de programação

Este documento tem a intenção de apresentar alguns dos conceitos fundamentais que permeiam as linguagens de programação. A ideia é mostrar algumas das principais características e diferenças que existem entre elas, para que dessa forma você possa determinar em que momento é melhor escolher uma dada linguagem em detrimento das outras.

Tradução

Compilador

Uma linguagem compilada é aquela no qual um programa chamado compilador irá fazer uma análise sintática, léxica e semântica de toda a estrutura de um código fonte e o converterá em um novo formato conhecido como código objeto que poderá ser identificado pelo computador.

	<?php

	namespaced App\Providers;

	use RuntimeException;
	use Illuminate\Support\Facades\Route;
	use Illuminate\Database\Eloquent\Model;
	use Illuminate\Routing\ImplicitRouteBinding;

	class RouteServiceProvider extends ServiceProvider

	//! Provide an audio input stream that automatically reconnects when disconnected.
	use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
	use cpal::{Device, Stream, StreamError};
	use log::{info, warn};
	use simple_error::bail;
	use std::error::Error;
	use std::sync::mpsc::channel;
	use std::thread;
	use std::time::Duration;

	# The next line updates PATH for the Google Cloud SDK.
	source /Users/dwchiang/google-cloud-sdk/path.zsh.inc

	# The next line enables zsh completion for gcloud.
	source /Users/dwchiang/google-cloud-sdk/completion.zsh.inc

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	# crystal build foo.cr --release
	# ./foo 37.7749 -122.4194 34.0522 -118.2437
	#
	# Around 0.08s.

	module GeoCalculator
	EARTH_RADIUS_IN_KM = 6371.0

	def self.distance(lat1, lon1, lat2, lon2)
	dlat = lat2 - lat1