Ruby - String Operations
Given a user input string that may have spaces and mixed case, which Ruby code snippet safely normalizes it to lowercase without extra spaces?
Given a user input string that may have spaces and mixed case, which Ruby code snippet safely normalizes it to lowercase without extra spaces?
hard📝 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Remove spaces first
Usestripto remove spaces from start and end before changing case.Step 2: Convert to lowercase
Applydowncaseafter stripping to get lowercase string without spaces.Step 3: Check other options
input.downcase changes case but leaves spaces. input.strip! && input.downcase! uses bang methods which may return nil and cause errors. input.downcase! only downcases without removing spaces.Final Answer:
input.strip.downcase -> Option BQuick Check:
strip then downcase = clean lowercase input [OK]
Quick Trick: Strip spaces before downcase to avoid leftover spaces [OK]
Common Mistakes:
- Using bang methods without checking nil
- Changing case before stripping
- Ignoring spaces in input
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