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# Ruby version has to be  1.9.3 or above, by default is 2.0
...
ruby '2.2.0'

# Heroku uses only supports Postgresql
# Check database.yml to make sure production is using postgresql
gem 'pg' #, group: :production # in case of using another db for development
gem 'rails', '4.2.0'
gem 'unicorn'
gem 'rails_12factor', group: :production

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module TicTacToe
  class Game
    # X starts
    # Previous winner starts new game
    #   or which turn would have followed if draw

    attr_reader :players, :grid, :turn

    def initialize(args={})
      @players = []

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#!/usr/bin/env bash
# Things to do after install ArchLinux (2012.12.01)

pacman --noconfirm -S sudo

# Enabled archlinuxfr repo
arch=$(uname -m)
sudo cp /etc/pacman.conf /etc/pacman.conf.bak
echo "" >> /etc/pacman.conf
echo "[archlinuxfr]" >> /etc/pacman.conf

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class Sendgrid
  class << self
    @@LISTS = {
      newsletter: ENV.fetch('SENDGRID_LIST_NEWSLETTER_ID'),
    }.with_indifferent_access

    def add_mail_to_list(list_name, email, args={})
      Rails.logger.info("SubscriptionWorker: Adding '#{email}' to sengrid list '#{list_name}'")
      contact_name = args[:contact_name] || ''
      subscribe_to_sendgrid(list_name, email, contact_name)

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#Vagrant

Creates and downloads if necesary a vm with Ubuntu 12.04 LTS

vagrant init hashicorp/precise32

Runs the VM of current directory

vagrant up

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Platforms

Medium

Ghost

$19/month

Hosting

Firebase

Digital Ocean

Viaduct

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Javascript libraries

webcamjs

For webcam input, freeze and convert to img.

Whatsapp

Using a link you can open whatsapp on mobile and have a predefined text to be sent to 1 or more contacts. If it is 1, it will open the conversation and the text will be already typed but it can be edited. In case of selecting multiple contacts, the message will be sent individualy without being able to edit.

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Accustoming Yourself to Ruby

ITEM 1: UNDERSTAND WHAT RUBY CONSIDERS TO BE TRUE

nil and false are the only objects evaluated as false.

!!nil == false # true
!!0 == false # false
false.nil? # false

ITEM 2: TREAT ALL OBJECTS AS IF THEY COULD BE NIL

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#Solidus

Install imagemagick for thumbnail generation

brew install imagemagick

Create a new rails app

rails new solidus -d postgresql

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Examples

Block requests with matching header

class Rack::Attack
  throttle('req/ip', limit: 0, period: 1.second) do |req|
    req.ip if req.env['HTTP_X_SCANNER'] == 'Netsparker' ||
              req.params['email'] == 'netsparker@example.com'
  end
end