GusGA

defmodule FizzBuzz do
  
  def start do
    IO.inspect Enum.map(1..100, fizz_or_buzz)
  end

  def fizz_or_buzz(n) do
    cond do
      rem(n,15) == 0 -> "FizzBuzz"
      rem(n,5)  == 0 -> "Buzz"

GusGA

require 'roo'

module ExcelValidator
  class Cause
    #EXCEL_COLUMN_NAMES = ['NOMBRE DEL CLIENTE', 'ASUNTO', 'CODIGO DE LA CAUSA', 'JUZGADO', 'MATERIA', 'CODIGO', 'PERSONAS INVOLUCRADAS EN LA CAUSA']
    # column_names = { id: 'NOMBRE DEL CLIENTE', ....  }
    class << self
      def manage_file(file, **column_names)
        @column_names = column_names
        case File.extname(file.original_filename)

GusGA

git log --numstat --pretty="%H" --author=$1 | grep -v "public/" | awk 'NF==3 {plus+=$1; minus+=$2} END {printf("+%d, -%d\n", plus, minus)}'

GusGA

DigitalOcean Ubuntu 14.04 x64 + Rails 4 + Nginx + Unicorn + PostgreSQL + Capistrano 3

Create a Droplet

SSH into Root

$ ssh [email protected]

Change Root Password

GusGA

Deploy Rails app to digitalocean with nginx, unicorn, capistrano & postgres

Create droplet of your liking (ubuntu 12.10 x32)

ssh to root in terminal with your server ip

ssh [email protected]

Add ssh fingerprint and enter password provided in email

GusGA

Transactions

As your business logic gets complex you may need to implement transactions. The classic example is a bank funds transfer from account A to account B. If the withdrawal from account A fails then the deposit to account B should either never take place or be rolled back.

Basics

All the complexity is handled by ActiveRecord::Transactions. Any model class or instance has a method named .transaction. When called and passed a block, that block will be executed inside a database transaction. If there's an exception raised, the transaction will automatically be rolled back.

Example

GusGA

morse_dict = Hash.new({
	"a" => ".-",
	"b" => "-...",
	"c" => "-.-.",
	"d" => "-..",
	"e" => ".",
	"f" => "..-.",
	"g" => "--.",
	"h" => "....",
	"i" => "..",

GusGA

require 'bundler/capistrano'

set :application, "net"
set :repository,  "[email protected]:net.git"

set :scm, :git

set :default_environment, {
  'PATH' => "$HOME/.rbenv/shims:$HOME/.rbenv/bin:$PATH"
}

GusGA

# Tell system when Xcode utilities live:
sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer

# Set "opendiff" as the default mergetool globally:
git config --global merge.tool opendiff

GusGA

#!bin/bash

if [ -z "$1" ]; then
    echo "Debes ingresar el nombre del proyecto o directorio"
    exit 1
else
    if  [ -e "$1" ]; then
        echo "El Directorio $1 ya existe"
        exit 1
    fi