You want to override a method calculate in a child class but also add extra behavior before and after calling the parent's method. Which is the correct way to do this in Ruby?
hard📝 Application Q8 of 15
Ruby - Inheritance
You want to override a method calculate in a child class but also add extra behavior before and after calling the parent's method. Which is the correct way to do this in Ruby?
ADefine <code>calculate</code> in child and do not call <code>super</code>.
BCall parent's <code>calculate</code> outside the child class.
CDefine <code>calculate</code> in child, call <code>super</code> between extra code blocks.
DUse alias to rename parent's method and call it manually.
Step-by-Step Solution
Solution:
Step 1: Understand adding behavior around parent method
To add code before and after parent's method, override and call super in between.
Step 2: Confirm correct approach
Calling super inside child method allows parent's method to run within extra code.
Final Answer:
Define calculate in child, call super between extra code blocks. -> Option C
Quick Check:
Use super inside override to wrap parent method [OK]
Quick Trick:Call super inside method to wrap parent behavior [OK]
Common Mistakes:
Forgetting to call super
Calling parent's method outside class
Using alias unnecessarily
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