thiagovsk

Semantic Commit Messages

See how a minor change to your commit message style can make you a better programmer.

Format: <type>(<scope>): <subject>

<scope> is optional

Example

thiagovsk

HTTP status code symbols for Rails

Thanks to Cody Fauser for this list of HTTP responce codes and their Ruby on Rails symbol mappings.

Status Code Symbol
1xx Informational
100 :continue
101 :switching_protocols
102 :processing

thiagovsk

#!/bin/bash

# remove exited containers:
docker ps --filter status=dead --filter status=exited -aq | xargs -r docker rm -v
    
# remove unused images:
docker images --no-trunc | grep '<none>' | awk '{ print $3 }' | xargs -r docker rmi

# remove unused volumes:
find '/var/lib/docker/volumes/' -mindepth 1 -maxdepth 1 -type d | grep -vFf <(

thiagovsk

require 'oauth'
require 'httpclient'
require 'json'

class SimpleTwitter
  def initialize(config)
    @config = config
    @http_client = HTTPClient.new
  end

thiagovsk

How to set up your VPS with Chef Solo

1. What is it?

There are many different provisioning tools out there, the most popular of which are Chef and Puppet. Chef uses Ruby, Puppet uses a DSL (Domain Specific Language), there are others that use simple bash too, but today we're going to focus on Chef Solo.

2. Dependencies

To get Chef working properly on your local machine you need a few things.

Make sure you use Ruby 1.9.x and not Ruby 2.x as you will get errors with the json 1.6.1 gem on 2.x. Use rbenv or RVM to manage several different Rubies on the one machine.

thiagovsk

sudo vim core/setup/controller.php

 71                 $autosetup_file = \OC::$SERVERROOT.'/owncloud_dev/autoconfig.php';

sudo vim lib/base.php

102                 } elseif(isset($_SERVER["OWNCLOUD_CONFIG_DIR"])) {
103                         self::$configDir = OC::$SERVERROOT . '/' . $_SERVER["OWNCLOUD_CONFIG_DIR"] . '/';

thiagovsk

#include <pthread.h>
#include <stdio.h>
#include <semaphore.h>

#define MAX_ITENS 100
#define USE_SEM

#ifdef USE_SEM
sem_t mutex; // protege a operação de adicionar ou remover itens
sem_t producer_calls_available; // verifica se há chamadas disponíves para o produtor

thiagovsk

# sudo nano /opt/nginx/conf/nginx.conf 

worker_processes  2;
worker_rlimit_nofile 100000;


events {
    worker_connections  768;
    use epoll;
    multi_accept on;

thiagovsk

Objeto é a noção de uma entidade que é definida inteiramente pelo seu comportamento. E esse comportamento é dinâmicamente selecionado. Em outras palavras, eu "peço" um objeto para "andar," e como ele vai fazer isso é inteiramente definido pelo objeto.

O exemplo:

objeto.anda()

Captura bem essa idéia. Eu tenho uma mensagem "anda," mas eu não consigo dizer o que essa função faz direto do meu código, porque isso depende no comportamento dinâmico da execução do programa (em uma linguagem estáticamente tipada você consegue optimizar isso, mas o raciocínio do código continua o mesmo).

thiagovsk

Gems

• Bundler - Bundler maintains a consistent environment for ruby applications. It tracks an application's code and the rubygems it needs to run, so that an application will always have the exact gems (and versions) that it needs to run.
• rabl - General ruby templating with json, bson, xml, plist and msgpack support
• Thin - Very fast and lightweight Ruby web server
• Unicorn - Unicorn is an HTTP server for Rack applications designed to only serve fast clients on low-latency, high-bandwidth connections and take advantage of features in Unix/Unix-like kernels.
• SimpleCov - SimpleCov is a code coverage analysis tool for Ruby 1.9.
• Zeus - Zeus preloads your Rails app so that your normal development tasks such as console, server, generate, and specs/tests take less than one second.
• [factory_girl](h