GusGA

package main

import (
	"crypto/hmac"
	"crypto/sha1"
	"crypto/subtle"
	"encoding/hex"
	"fmt"
	"os"
)

GusGA

# Configuration for Alacritty, the GPU enhanced terminal emulator

# Any items in the `env` entry below will be added as
# environment variables. Some entries may override variables
# set by alacritty it self.
env:
  # TERM env customization.
  #
  # If this property is not set, alacritty will set it to xterm-256color.
  #

GusGA

Erlang for beginners

• Why erlang?
• Why Use Erlang?
• When would you choose Erlang?
• Erlang: For an absolute beginner
• An Erlang OTP tutorial for beginners
• A Beginners Guide to Erlang
• What is the best way to learn Erlang?
• The Joy of Erlang; Or, How To Ride A Toruk

GusGA

module StrongParamsHelpers
  extend Grape::API::Helpers

  def permitted_params
    @permitted_params ||= declared(params, include_missing: false, include_parent_namespaces: false)
  end
end

GusGA

#log de commits locales que no se han pusheado
alias gl='git log --branches --not --remotes --decorate'
alias gs='git status'
alias gf='git fetch origin'
alias gd='git difftool --tool=meld -d HEAD &'
alias ga='git add -u .;git add .'
alias gb='git branch -a'
gr(){
  git reset $*

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"
}