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Install nginx

$ brew install nginx

Edit nginx.conf

$ vim /usr/local/etc/nginx/nginx.conf

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Order of Rails Controller Callbacks

Rails 4.x

Started GET "/" for 127.0.0.1 at 2017-05-19 14:17:18 +0200
  Processing by WelcomeController#index as HTML
    prepend_around_action
    prepend_before_action
 before_action

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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

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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

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Webpack in Rails

All code is available in example app - https://github.com/maxivak/webpacker-rails-example-app

Table of Contents

• NPM and Yarn
• Webpack and Webpacker

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class DatabaseHelper
  def self.select name, *args, &blk
    execute "select", name, *args, &blk
  end

  def self.call name, *args, &blk
    execute "call", name, *args, &blk
  end

  def self.execute via, name, *args, &blk

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##
# This files shows some possible implementations of the Singleton pattern
# in Ruby. I'm not a huge fan of the Singleton pattern, but it's nice
# in some cases. In this file I'm going to implement a simple logger.
#


##
# The first implementation that can come to our minds is to create a class
# that holds an instance as a class variable that can be accessed through

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How to use GoDaddy SSL certs with Express JS

• Node requires each certificate in the CA chain to be passed separately in an array.
• GoDaddy provides a cerficate file (gd_bundle.crt) probably looks like this:

-----BEGIN CERTIFICATE-----
MIIE3jCCA...
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----

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/* 
  ##Device = Desktops
  ##Screen = 1281px to higher resolution desktops
*/

@media (min-width: 1281px) {
  
  //CSS