You want to build a Ruby framework that allows users to add multiple hooks for before_save and run them all in order before saving. Which approach best supports this?
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Ruby - Advanced Metaprogramming
You want to build a Ruby framework that allows users to add multiple hooks for before_save and run them all in order before saving. Which approach best supports this?
AStore hooks in an array and call each block in sequence before saving
BStore a single block in a class variable and overwrite it each time
CUse global variables to store hooks and call them randomly
DDefine multiple methods named before_save and rely on Ruby to call all
Step-by-Step Solution
Solution:
Step 1: Understand the need for multiple hooks
To support many hooks, you must keep all hook blocks, not overwrite them.
Step 2: Choose a data structure to hold hooks
An array can store multiple blocks, allowing iteration and calling each in order.
Step 3: Why other options fail
Overwriting loses hooks, global variables cause conflicts, and Ruby does not call multiple methods with same name automatically.
Final Answer:
Store hooks in an array and call each block in sequence before saving -> Option A
Quick Check:
Multiple hooks need array storage = A [OK]
Quick Trick:Use array to keep and run multiple hooks in order [OK]
Common Mistakes:
Overwriting hooks instead of storing all
Using global variables causing conflicts
Expecting Ruby to call duplicate method names
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