How can you safely use method_added to track new methods without causing infinite recursion when defining methods inside the hook?

hard📝 Application Q15 of 15

Ruby - Advanced Metaprogramming

How can you safely use method_added to track new methods without causing infinite recursion when defining methods inside the hook?

AUse <code>alias_method</code> to rename methods inside method_added

BDefine all methods outside the class to avoid triggering method_added

CRemove method_added after the first method is added

DUse a guard variable to skip method_added logic when defining methods inside the hook

Step-by-Step Solution

Solution:

Step 1: Understand the recursion problem
Defining methods inside method_added triggers the hook again, causing infinite recursion.
Step 2: Use a guard variable
By setting a flag (e.g., a class variable) before defining methods inside the hook and checking it at the start of method_added, you can skip the hook logic during internal method definitions.
Step 3: Implement safe tracking
This approach allows tracking new methods safely without recursion.
Final Answer:
Use a guard variable to skip method_added logic when defining methods inside the hook -> Option D
Quick Check:
Guard variable prevents recursion in method_added [OK]

Quick Trick: Use a flag to skip method_added during internal method definitions [OK]

Common Mistakes:

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