Eloquent Ruby - book notes
Language Basics
Ch 01 - Syntax
- Very Basics- Comments
- Camels & Snakes
- Parentheses
- Line Folding
- Code Blocks
Ch 02 - Control Structures
- If, Unless, While, Until- Modifier forms
- Use
each - not for- Case
- Boolean logic pitfalls
Ch 03 - Smart Collections
- Literal shortcuts- Instant arrays & hashes from Method calls
- Iterating through a collection
- Bang (!) methods
- Hash ordering
Ch 05 - Regexes
- Matching one character at a time- Sets, ranges & alternatives
- The Star ("*") operator
- Regexes in Ruby
- Beginnings & endings
Ch 07 - Everything is an Object
- Classes, instances & methods - a quick review- Objects: all the way down
- Key object attributes
- Public, private & protected methods
Ch 08 - Dynamic Typing
- Shorter programs - not in the way you think- Decoupling
- Ceremony vs Clarity
Classes, Modules, Blocks
Ch 10 - Classes
- Compressing specifications- Composing Methods for Humans
- Composing Ruby Methods
- Single Exit Methods
Ch 11 - Operators
- Defining Ruby Operators- Examples
- Operating across Classes
- Broadening the Definition of "=="
- Well-Behaved Equality
- Triple Equals ("===") for Case Statements
- Hash Tables and
eql?- Well-Behaved Hash Keys
Ch 12 - Classes & Equality
- An Identifier for your Documents- Multiple Equality Methods
- Double Equals ("==")
Ch 14 - Class Instance Variables
- Quick Review- "Wandering" Variables
- Class data
- Class Instances - Variables & Subclasses
- Convenience Tricks
Ch 15 - Modules & Name Spaces
- A Place for your Stuff- A Home for Utility Methods
- Building Modules
- Treat Modules as Objects (Because they are)
Ch 16 - Modules & Mixins
- Better Books with Modules- Mixin Modules to the Rescue
- Extending a Module
Ch 17 - Blocks & Iteration
- Review of Code Blocks- One Words after Another
- As Many Iterators as You Like
- Other Iterator Tools
- Enumerable: Your Iterator on Steroids
Ch 18 - Executing around Blocks
- Logging- When it Must Happen
- Initialization Blocks
- Scope and Blocks
- Carrying Answers Back
Ch 19 - Delayed Execution
- Explicit Blocks- The Callback Problem
- Banking Blocks
- Saving Blocks for Lazy Initialization
- Instant Block Objects
Metaprogramming
Ch 20 - Hooks
- Waking up to a New Subclass- Modules Want to be Heard
- Knowing When your Time is Up
- ...And a Cast of Thousands
Ch 21 - method_missing & Errors
- Meeting those Missing Methods- Handling Document Errors
- Coping with Constants
Ch 22 - method_missing & Delegation
- Delegation- Old-Fashioned Delegation Trouble
-
method_missing- More Discriminating Delegation
Ch 23 - method_missing & APIs
- Building Form Letters One Word at a Time- Magic Methods
- It's the Users that Count
Ch 24 - Monkey Patching (Existing Classes)
- Wide-Open Classes- Fixing a Broken Class
- Improving Existing Classes
- Renaming with
alias_method- Do Anything to any Class - Anytime
Ch 25 - Self-modifying Classes
- Open Classes - Again- Putting Logic in a Class
- Class Methods that Change their Class
Ch 26 - Classes that Modify Subclasses
- A document of Paragraphs- Subclassing
- Class Methods that Build Instance Methods
- Better Method Creation:
define_method- Modifications: the Sky is the Limit
Putting it Together
Ch 27 - Internal DSLs
- Little Languages for Big Problems- XML
- Stepping over the DSL Line
- Pulling out the Stops
Ch 28 - External DSLs
- The Trouble with the Ripper- Internal is not the only DSL
- Regex for Heavier Parsing
- Treetops
-
Ch 29 - Packaging Gems
- Consuming Gems- Gem Versions
- Nuts & Bolts
- Building a Gem
- Uploading Your Gem to a Repo
- Automating Gem Creation