How can you find the first string in an array arr that starts with a vowel and has length 5 using detect?

hard📝 Application Q9 of 15

Ruby - Enumerable and Collection Processing

How can you find the first string in an array arr that starts with a vowel and has length 5 using detect?

Aarr.detect { |s| s.match?(/^[aeiou]/i) && s.length == 5 }

Barr.detect { |s| s.start_with?('a','e','i','o','u') && s.size == 5 }

Carr.find { |s| s[0] =~ /[aeiou]/ && s.length == 5 }

DAll of the above

Step-by-Step Solution

Solution:

Step 1: Understand different ways to check starting vowel
Regex with match?, pattern match with =~, and start_with? all check first letter.
Step 2: Confirm length checks are correct
Using length or size both measure string length correctly.
Step 3: All options correctly find first string matching both conditions
Therefore, all options are valid ways to solve the problem.
Final Answer:
All of the above -> Option D
Quick Check:
Multiple valid methods for condition = D [OK]

Quick Trick: Multiple Ruby methods can check string start and length [OK]

Common Mistakes:

Master "Enumerable and Collection Processing" in Ruby

9 interactive learning modes - each teaches the same concept differently

Want More Practice?

15+ quiz questions · All difficulty levels · Free

More Ruby Quizzes