ntl

# This is an example using Eventide's message handling DSL for declaring different
# handler methods based on message type
class SomeHandler
  include Messaging::Handle
  
  handle SomeMessage do |some_msg|
    # ...
  end

  handle OtherMessage do |other_msg|

ntl

class InitializerArgumentsPaymentProcessor
  def initialize(number, expiration_date, amount)
    @number, @expiration_date, @amount = number, expiration_date, amount
  end
  
  def call
    if SomeGateway.(number, expiration_date, amount)
      true
    else
      false

ntl

source "https://rubygems.org"

gem "whatever"

# Load minitest and red-green
group :minitest do
  gem "minitest"
  gem "minitest-rg"
end

ntl

# app/commands/receive_bonus_command.rb
# Commands look like ActiveModel+virtus "ish" objects
class ReceiveBonusCommand < Command
  attribute :income_source_id, String
  attribute :bonus_amount,     Integer
  attribute :effective_date,   Date
  
  validates :account_id, presence: true
  
  def validate

ntl

# The controller; yeah it's not great but I want to show the tests
class ProductsController < ApplicationController
  def index
    if params[:min_rating]
      @products = Product.where("average_rating >= ?", params[:min_rating])
    else
      @products = Product.to_a
    end
  end
end

ntl

# Instead of ditching ivars, just make them easier to discover:

class ApplicationController < ActionController::Base
  
  private
  
  # Expose an object as an ivar to your views. Explodes if you try to assign nil.
  #
  # Use:
  #