amuhle

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• I am amuhle on github.
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• I have a public key ASA1n5UTyaOSodz--k1xNJ_DTDHjjcOUVH9NypPNEhBn_go

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amuhle

Chapter 1 - Object Oriented Design

The purpose of design is to allow you to do design later, and it's primary goal is to reduce the cost of change.

SOLID Design:

• Single Responsibility Principle: a class should have only a single responsibility
• Open-Closed Principle: Software entities should be open for extension, but closed for modification (inherit instead of modifying existing classes).
• Liskov Substitution: Objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program.
• Interface Segregation: Many client-specific interfaces are better than one general-purpose interface.

amuhle

require 'minitest/autorun'
class ArrayUtil
  attr_reader :array

  def initialize(array)
    @array = array
  end

  def super_flatten
    @result = []

amuhle

{
    "id": 1880,
    "first_name": "Jordi",
    "last_name": "Alba",
    "email": "jordialba@gmail.com",
    "token": "BQ6A-Q353",
    "status": {
        "name": "results_ready",
        "label": "Results Ready"
    },

amuhle

require 'active_record'
require 'mysql2'
require 'minitest/autorun'
require 'logger'
puts "ActiveRecord: #{ActiveRecord::VERSION::STRING}"

ActiveRecord::Base.establish_connection(adapter: "mysql2", host: "localhost", database: "test")
ActiveRecord::Base.logger = Logger.new(STDOUT)

class Author < ActiveRecord::Base