Ruby - Regular Expressions
How do you correctly use Ruby's
scan method to extract all lowercase letters from a string text?How do you correctly use Ruby's scan method to extract all lowercase letters from a string text?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Identify the pattern
We want to find all lowercase letters, which are represented by the character class [a-z].Step 2: Use scan with regex
Thescanmethod takes a regex and returns all matches. Using/[a-z]/will find each lowercase letter.Final Answer:
text.scan(/[a-z]/) -> Option BQuick Check:
Check if output contains only lowercase letters. [OK]
Quick Trick: Use /[a-z]/ to match all lowercase letters [OK]
Common Mistakes:
- Using \d+ which matches digits, not letters
- Using uppercase range [A-Z] instead of lowercase
- Using \w+ which matches letters, digits, and underscore
Master "Regular Expressions" in Ruby
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