目录 - 博文视点

Chapter 2: Classes, Objects, and Modules  
Item 6: Know How Ruby Builds Inheritance Hierarchies  
Item 7: Be Aware of the Different Behaviors of super  
Item 8: Invoke super When Initializing Subclasses  
Item 9: Be Alert for Ruby’s Most Vexing Parse  
Item 10: Prefer Struct to Hash for Structured Data  
Item 11: Create Namespaces by Nesting Code in Modules  
Item 12: Understand the Different Flavors of Equality  
Item 13: Implement Comparison via “\<=\>” and the Comparable Module  
Item 14: Share Private State through Protected Methods  
Item 15: Prefer Class Instance Variables to Class Variables

Chapter 3: Collections  
Item 16: Duplicate Collections Passed as Arguments before Mutating Them  
Item 17: Use the Array Method to Convert nil and Scalar Objects into Arrays  
Item 18: Consider Set for Efficient Element Inclusion Checking  
Item 19: Know How to Fold Collections with reduce  
Item 20: Consider Using a Default Hash Value  
Item 21: Prefer Delegation to Inheriting from Collection Classes

Chapter 4: Exceptions  
Item 22: Prefer Custom Exceptions to Raising Strings  
Item 23: Rescue the Most Specific Exception Possible  
Item 24: Manage Resources with Blocks and ensure  
Item 25: Exit ensure Clauses by Flowing Off the End  
Item 26: Bound retry Attempts, Vary Their Frequency, and Keep an Audit Trail  
Item 27: Prefer throw to raise for Jumping Out of Scope

Chapter 5: Metaprogramming  
Item 28: Familiarize Yourself with Module and Class Hooks  
Item 29: Invoke super from within Class Hooks  
Item 30: Prefer define\_method to method\_missing  
Item 31: Know the Difference between the Variants of eval  
Item 32: Consider Alternatives to Monkey Patching  
Item 33: Invoke Modified Methods with Alias Chaining  
Item 34: Consider Supporting Differences in Proc Arity  
Item 35: Think Carefully Before Using Module Prepending

Chapter 6: Testing  
Item 36: Familiarize Yourself with MiniTest Unit Testing  
Item 37: Familiarize Yourself with MiniTest Spec Testing  
Item 38: Simulate Determinism with Mock Objects  
Item 39: Strive for Effectively Tested Code

Chapter 7: Tools and Libraries  
Item 40: Know How to Work with Ruby Documentation  
Item 41: Be Aware of IRB’s Advanced Features  
Item 42: Manage Gem Dependencies with Bundler  
Item 43: Specify an Upper Bound for Gem Dependencies

Chapter 8: Memory Management and Performance  
Item 44: Familiarize Yourself with Ruby’s Garbage Collector  
Item 45: Create Resource Safety Nets with Finalizers  
Item 46: Be Aware of Ruby Profiling Tools  
Item 47: Avoid Object Literals in Loops  
Item 48: Consider Memoizing Expensive Computations  
Epilogue  
Index

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