danilobatistaqueiroz

Configuring a Maven project to run test coverage with SonarQube, Jacoco

Install the SonarQube server, go the download page, choose the community edition:
https://www.sonarqube.org/downloads/

Add Jacoco plugin in POM.xml:

<build>

danilobatistaqueiroz

AMQP vs JMS

JMS: only java, it is a specification
AMPQ: universal, it is a protocol, it is open standard for messaging

JMS doesn't define a protocol.

JMS is an API and AMQP is a protocol.

AMQP supports 4 message models: Direct, Fanout, Topic, Headers

danilobatistaqueiroz

Refactoring, Fowler

http://martinfowler.com/books/refactoring.html

Five or six years ago I was working on an essay about refactoring CSS. I didn't do that, but I did find these notes while working on something new. Hope they're useful! —Dean

p7 "When you find you have to add a feature to a program, and the program's code is not structured in a convenient way to add the feature, first refactor the program to make it easy to add the feature, then add the feature."

p7

danilobatistaqueiroz

On Ubuntu 16.04 LTS, I successfully used the following to disable suspend:

sudo systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target

And this to re-enable it:

sudo systemctl unmask sleep.target suspend.target hibernate.target hybrid-sleep.target

danilobatistaqueiroz

Startup scripts for bash shell

TL;DR

Interactive shell: When reads commands from user input on a tty (prompt).
--interactive sources --> /etc/bash.bashrc and ~/.bashrc
Login shell: When a login prompt is required.
--login sources --> /etc/profile and ~/.profile

Interactive non-login shell: Open a new terminal.
--it sources ~/.bashrc

danilobatistaqueiroz

Refatorar é bom para aprender OO

Uncle Bob blogou no Clean Coder sobre uns code reviews que ele fez do código (e das refatorações) de um cara chamado John MacIntyre.

Uncle Bob criticou a conclusão do cara de que refatoração não vale a pena para projetos reais: refatoração é uma maneira efetiva de evitar que o código apodreça e fique difícil de manter.

O que achei de mais interessante sobre o post do Uncle Bob é que ele pegou o código inicial do cara e foi fazendo pequenas refatorações, no estilo Baby Steps. No final, acabou melhorando drasticamente a estrutura do código e tornando-o muito mais extensível. O exemplo é bem pequeno mas, mesmo assim, houve uma melhora significativa.
O código inicial:

danilobatistaqueiroz

def recursive_fib(n):
    if n <= 1:
        return n
    return recursive_fib(n - 2) + recursive_fib(n - 1)


def memoized_fib(n):
    f = [0] * (n + 1)
    f[0] = 0
    f[1] = 1

danilobatistaqueiroz

https://www.competa.com/blog/how-to-run-npm-without-sudo/

npm config set prefix ~/.npm

# open your .bashrc (Linux) or .bash_profile (Mac) file for editing:
nano ~/.bashrc # for Linux
# or...
nano ~/.bash_profile # for Mac if you haven't created a .bashrc file

# add these lines:

danilobatistaqueiroz

function cnpj(s) {
	let cnpj = s.replace(/[^\d]+/g, '')

	// Valida a quantidade de caracteres
	if (cnpj.length !== 14)
		return false

	// Elimina inválidos com todos os caracteres iguais
	if (/^(\d)\1+$/.test(cnpj))
		return false

danilobatistaqueiroz

import pymongo
from pymongo import Connection

conn = Connection()
db = conn['myDB']
collection = db['language']

#Creating a collection
db.language.insert({"id": "1", "name": "C", "grade":"Boring"})
db.language.insert({"id": "2", "name":"Python", "grade":"Interesting"})