harlow

1. Your class can be no longer than 100 lines of code.
2. Your methods can be no longer than five lines of code.
3. You can pass no more than four parameters and you can’t just make it one big hash.
4. When a call comes into your Rails controller, you can only instantiate one object to do whatever it is that needs to be done.

You can break these rules if you can talk your pair into agreeing with you.

harlow

# coding: utf-8
require 'sinatra'
set server: 'thin', connections: []

get '/' do
  halt erb(:login) unless params[:user]
  erb :chat, locals: { user: params[:user].gsub(/\W/, '') }
end

get '/stream', provides: 'text/event-stream' do

harlow

class BookingPaymentsController < ApplicationController
  def create
    booking_payment = BookingPayment.new(booking_payment_params)
    booking_payment.pay

    respond_with payment, location: balance_trip_path
  end
  
  private
  

harlow

# ------------------------------------------------------------------
# Desigining "trending topics in 24 hours sliding window" with Redis
# ------------------------------------------------------------------

redis-cli del tophashes:2010-12-07-08-00
redis-cli del tophashes:2010-12-07-09-00
redis-cli del tophashes:current

echo '=== 8:00 AM ==='

harlow

class TaskCompletion
  include ActiveModel::Model
  attr_accessor :task, :complete
  
  validates :complete, inclusion: { in: [true, false] }

  def self.for_task(task, params={})
    new(params).tap do |completion|
      completion.task = task
    end

harlow

{
  "_links": {
    "self": { "href": "/orders" },
    "next": { "href": "/orders?page=2" },
    "find": { "href": "/orders{?id}", "templated": true }
  },
  "_embedded": {
    "orders": [{
        "_links": {
          "self": { "href": "/orders/123" },

harlow

#!/bin/bash
# from here: http://www.codingsteps.com/install-redis-2-6-on-amazon-ec2-linux-ami-or-centos/
# and here: https://raw.github.com/gist/257849/9f1e627e0b7dbe68882fa2b7bdb1b2b263522004/redis-server
###############################################
# To use: 
# wget https://raw.github.com/gist/2776679/04ca3bbb9f085b192f6aca945120fe12d59f15f9/install-redis.sh
# chmod 777 install-redis.sh
# ./install-redis.sh
###############################################
echo "*****************************************"

harlow

backend default {
  .host = "127.0.0.1";
  .port = "8000";
}

# We go BACK to varnish to get it to generate an ESI template that 
# generates a JSON-P response.
backend jsonp_template_backend {
  .host = "127.0.0.1";
  .port = "8070";

harlow

# MODEL

class Case < ActiveRecord::Base
  include Eventable
  
  has_many :tasks

  concerning :Assignment do
    def assign_to(new_owner:, details:)
      transaction do

harlow

# autoload concerns
module YourApp
  class Application < Rails::Application
    config.autoload_paths += %W(
      #{config.root}/app/controllers/concerns
      #{config.root}/app/models/concerns
    )
  end
end