[Solved] How can you safely chain methods when some may return nil?Example: user&.profile&.address&.city What does this pattern prevent? | Ruby

Ruby - Functional Patterns in Ruby

How can you safely chain methods when some may return nil?
Example:

user&.profile&.address&.city

What does this pattern prevent?

AIt prevents NoMethodError by stopping chain if nil encountered

BIt forces all methods to return strings

CIt automatically retries methods on failure

DIt converts nil to empty string before chaining

Step-by-Step Solution

Solution:

Step 1: Understand safe navigation operator (&.)
The &. operator calls method only if object is not nil, else returns nil immediately.
Step 2: Identify error prevention
This prevents NoMethodError when chaining methods on possible nil objects.
Final Answer:
It prevents NoMethodError by stopping chain if nil encountered -> Option A
Quick Check:
Safe navigation avoids errors on nil in chains [OK]

Quick Trick: Use &. to safely chain methods on possible nil objects [OK]

Common Mistakes:

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How can you safely chain methods when some may return nil?