Ruby - Regular Expressions
Why does the match operator
=~ return nil when the pattern is not found in the string?Why does the match operator =~ return nil when the pattern is not found in the string?
hard📝 Conceptual Q10 of 15
Step-by-Step Solution
Solution:
Step 1: Understand match operator return values
It returns the index of the first match if found.Step 2: Reason about no match case
If no match exists, there is no index to return, so it returnsnil.Final Answer:
Because no match means no index to return -> Option AQuick Check:
No match returns nil, not error or false [OK]
Quick Trick: No match means no index, so returns nil [OK]
Common Mistakes:
- Thinking it returns false instead of nil
- Expecting an error on no match
- Assuming it always returns a number
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