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Ruby Metaprogramming Workshop🪄

Intermediate→Advanced

Ruby 4.0

Unlock the full dynamic power of Ruby. Learn to write code that writes code, build DSLs, and understand the magic behind Rails.

5

Sections

20

Lessons

15

Challenges

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20 lessons and 15 challenges, all 100% free.

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The Ancestor Chain

Ancestor Chain Order(Sign in required)

Intermediate+20 Mana

The Singleton Class

Singleton vs Instance Methods(Sign in required)

Intermediate+20 Mana

Understanding Self

Self in Context(Sign in required)

Beginner+10 Mana

Dynamic Dispatch with Send

Defining Methods Dynamically

Ghost Methods with method_missing

Complete Method Missing(Sign in required)

Advanced+30 Mana

Send vs Public Send(Sign in required)

Intermediate+20 Mana

define_method Closure(Sign in required)

Intermediate+20 Mana

Instance Eval & Class Eval

The Binding Object

instance_eval vs class_eval(Sign in required)

Advanced+30 Mana

Scope Gates & Flat Scope

Scope Gates(Sign in required)

Intermediate+20 Mana

Context Probing Techniques

Binding Object Usage(Sign in required)

Intermediate+20 Mana

Lifecycle Hooks

Refinement Scope(Sign in required)

Intermediate+20 Mana

The Concern Pattern

Lifecycle Hooks(Sign in required)

Intermediate+20 Mana

Prepend Patterns

Prepend Benefits(Sign in required)

Intermediate+20 Mana

Method Introspection

TracePoint Events(Sign in required)

Intermediate+20 Mana

Stack Traces & Caller

Finding Method Source(Sign in required)

Intermediate+20 Mana

Building Debugging Tools

Structured Call Stack(Sign in required)

Intermediate+20 Mana

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20 interactive lessons and 15 hands-on challenges — learn in VS Code, Cursor, or the web.