Paolo Perrotta - Metaprogramming Ruby 2 [2014, PDF, ENG]

Introduction

Metaprogramming Ruby
The M Word
Ghost Towns and Marketplaces
The Story of Bob, Metaprogrammer
Metaprogramming and Ruby
Monday: The Object Model
Open Classes
Inside the Object Model
Quiz: Missing Lines
What Happens When You Call a Method?
Quiz: Tangle of Modules
Wrap-Up
Tuesday: Methods excerpt
A Duplication Problem
Dynamic Methods
method_missing
Quiz: Bug Hunt
Blank Slates
Wrap-Up
Wednesday: Blocks
The Day of the Blocks
Quiz: Ruby#
Blocks Are Closures excerpt
instance_eval()
Callable Objects
Writing a Domain-Specific Language
Quiz: A Better DSL
Wrap-Up
Thursday: Class Definitions
Class Definitions Demystified
Quiz: Class Taboo
Singleton Methods
Singleton Classes
Quiz: Module Trouble
Method Wrappers
Quiz: Broken Math
Wrap-Up
Friday: Code That Writes Code
Coding Your Way to the Weekend
Kernel#eval
Quiz: Checked Attributes (Step 1)
Quiz: Checked Attributes (Step 2)
Quiz: Checked Attributes (Step 3)
Quiz: Checked Attributes (Step 4)
Hook Methods
Quiz: Checked Attributes (Step 5)
Wrap-Up
Epilogue
Metaprogramming in Rails
Preparing for a Rails Tour
Ruby on Rails
Installing Rails
The Rails Source Code
The Design of ActiveRecord
A Short ActiveRecord Example
How ActiveRecord Is Put Together
A Lesson Learned
ActiveSupport’s Concern Module excerpt
Rails Before Concern
ActiveSupport::Concern
A Lesson Learned
The Rise and Fall of alias_method_chain
The Rise of alias_method_chain
The Fall of alias_method_chain
A Lesson Learned
The Evolution of Attribute Methods
Attribute Methods in Action
A History of Complexity
A Lesson Learned
One Final Lesson
Metaprogramming Is Just Programming
Appendixes
Common Idioms
Mimic Methods
Nil Guards
Self Yield
Symbol#to_proc()
Domain-Specific Languages
The Case for Domain-Specific Languages
Internal and External DSLs
DSLs and Metaprogramming
Spell Book
The Spells