[Solved] Identify the issue in this Ruby metaprogramming code:class Sample def self.add_method(name, &block) define_method(name, &block) end add_method(:test) do puts "Test method called" end end | Ruby

Ruby - Metaprogramming Fundamentals

Identify the issue in this Ruby metaprogramming code:

class Sample
  def self.add_method(name, &block)
    define_method(name, &block)
  end

  add_method(:test) do
    puts "Test method called"
  end
end

Aadd_method should be an instance method, not a class method

BThe block passed to add_method is missing a parameter

Cdefine_method cannot be called directly inside a class method without context

DThe method name must be a string, not a symbol

Step-by-Step Solution

Solution:

Step 1: Understand define_method scope
define_method is a private instance method of Module, used to define instance methods.
Step 2: Analyze the code
Calling define_method inside a class method (self.add_method) lacks the proper context (self is the class object, not a Module instance).
Step 3: Correct usage
To define instance methods dynamically, define_method should be called on the class's singleton class or inside class_eval.
Final Answer:
define_method cannot be called directly inside a class method without context -> Option C
Quick Check:
define_method needs proper context (Module or class_eval) [OK]

Quick Trick: define_method requires Module context [OK]

Common Mistakes:

Calling define_method inside class methods without context
Assuming method names must be strings
Confusing class and instance methods

Master "Metaprogramming Fundamentals" in Ruby

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

More Ruby Quizzes

Identify the issue in this Ruby metaprogramming code:

Step 1: Understand define_method scope

Step 2: Analyze the code

Step 3: Correct usage

Final Answer:

Quick Check:

Want More Practice?