Summary: Panelists Avdi Grimm (twitter github blog book) Charles Max Wood (twitter github Teach Me To Code) David Brady (blog twitter github ADDcasts) James Edward Gray (blog twitter github) Josh Susser (twitter github blog) Jim Weirich (twitter github blog) Discussed in this Episode What is Object Oriented Programming? If Ruby or Rails programmers aren't programming in an object oriented way does it matter? The goal isn't to do OO for OO's sake. Polymorphism Tell, don't ask Encapsulation Case switching on the object's class can be refactored to take advantage of Polymorphism Law of Demeter: Am I allowed to know this? Single Responsibility Principle Ask "What does this object do?" rather than building around the data contained in the object. Presenters (The Presenter Pattern) Steven Kabnik's Post on Object Oriented Programming and the Presenter Pattern in Rails The problem with Helpers In OO, you're allowed to add more Objects (or Classes) Building your models without referencing ActiveRecord Business objects that reference ActiveRecord data access objects Object Thinking The database is the last bastion of non-object oriented thinking Behavior centric vs data centric design The impedance mismatch between the database and the object oriented designs Inheritance Object Oriented Design centers around maintainability and complexity Don't use generators Create classes and evolve them into models as you need the persistence Rather than asking for data, tell a class to do something for you Three small things to watch out for: Switch/case on class Arrays and hashes or arrays of hashes of arrays (Primitive Obsession) Subclassing Array or Hash forwardable delegate Don't inherit from String Enumerable module Rake's FileList Skinny Controllers Is REST simply a way of pulling the impedance mismatch from the database all the way up to URL's? Picks RailsBridge workshops (Josh) Ryan Tomayko's blog post on Unicorn (James) The Unix System Programming with Ruby list (James) awesome_print gem (David) vimcasts.org (David) hub (Avdi) AeroPress Coffee and Espresso Maker (Avdi) Institute of Awesome (Chuck) Bloons Tower Defense 4 (Chuck) World of Goo (Chuck) Writing Solid Code (Jim) Ukuleles (Jim) Jake Shimabukuro
