[Solved] Identify the error in this Ruby code snippet: sentence = "Hello World!" sentence.gsub(/world/, "Earth") What is the problem? | Ruby

Ruby - Regular Expressions

Identify the error in this Ruby code snippet:

sentence = "Hello World!"
sentence.gsub(/world/, "Earth")

What is the problem?

ARegex is case-sensitive, so 'world' does not match 'World'.

BMissing replacement string in gsub.

CSyntax error due to missing parentheses.

Dgsub cannot be used with regex.

Step-by-Step Solution

Solution:

Step 1: Check regex matching
The regex /world/ is lowercase and Ruby regex is case-sensitive by default.
Step 2: Compare with string content
The string has "World" with uppercase W, so the regex does not match anything.
Final Answer:
Regex is case-sensitive, so 'world' does not match 'World'. -> Option A
Quick Check:
Case sensitivity causes no match [OK]

Quick Trick: Remember regex is case-sensitive unless flagged [OK]

Common Mistakes:

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