Ruby - String Operations
Which Ruby code correctly replaces all vowels in a string with '#' using string mutability?
str = "education" # Your code here puts str
Which Ruby code correctly replaces all vowels in a string with '#' using string mutability?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand string mutability methods
gsub! modifies the string in place, while gsub returns a new string.Step 2: Analyze options
str.gsub!(/[aeiou]/, '#') uses gsub! which mutates the original string directly.Step 3: Compare with other options
str = str.gsub(/[aeiou]/, '#') reassigns the string, not mutating it in place. str.replace(str.gsub(/[aeiou]/, '#')) replaces the string content but is less direct. str.sub(/[aeiou]/, '#') only replaces the first vowel.Final Answer:
str.gsub!(/[aeiou]/, '#') -> Option AQuick Check:
Use gsub! for in-place vowel replacement [OK]
Quick Trick: Use gsub! to mutate string in place [OK]
Common Mistakes:
MISTAKES- Using gsub instead of gsub! for mutation
- Using sub which replaces only first match
- Reassigning string instead of mutating
Master "String Operations" in Ruby
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