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

How to use a PS3 controller on Mac OS X 10.7 (Lion)

1. Open Apple menu -> System Preferences -> Bluetooth and disable Bluetooth on Mac as well as any other nearby Macs or devices which will try to pair with and confuse the controller.

2. Reset PS3 controller by inserting paperclip into pinhole near L2 button.

3. Connect PS3 controller to Mac with USB cable.

4. Enable Bluetooth.

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 root@123.123.123.123

Add ssh fingerprint and enter password provided in email

GusGA

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

Create a Droplet

SSH into Root

$ ssh root@123.123.123.123

Change Root Password

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" => "..",