[Solved] Why does this code raise an error?nil.strip.upcase — Ans: Because nil does not have the method strip | Ruby

Ruby - Functional Patterns in Ruby

Why does this code raise an error?

nil.strip.upcase

ABecause strip returns nil

BBecause upcase cannot be called on strings

CBecause nil does not have the method strip

DBecause method chaining is not allowed on nil

Step-by-Step Solution

Solution:

Step 1: Check methods on nil
nil is an object but does not have the strip method.
Step 2: Understand error cause
Calling strip on nil causes NoMethodError, so chaining fails immediately.
Final Answer:
Because nil does not have the method strip -> Option C
Quick Check:
Calling method on nil without definition causes error [OK]

Quick Trick: Check if object supports method before chaining [OK]

Common Mistakes:

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