Ruby - Regular Expressions
Which character class in Ruby regex matches any digit from 0 to 9?
Which character class in Ruby regex matches any digit from 0 to 9?
easy📝 Conceptual Q1 of 15
Step-by-Step Solution
Solution:
Step 1: Understand Ruby regex character classes
In Ruby regex, "\\d" matches any digit (0-9), "\\w" matches word characters, "\\s" matches whitespace, and "\\D" matches non-digits.Step 2: Identify the digit matching class
Since the question asks for digits 0-9, "\\d" is the correct character class.Final Answer:
"\\d" matches digits 0-9 -> Option DQuick Check:
Digit class = "\\d" [OK]
Quick Trick: Digits are matched by \d in Ruby regex [OK]
Common Mistakes:
- Confusing \w (word chars) with \d (digits)
- Using \D which matches non-digits
- Mistaking \s (spaces) for digits
Master "Regular Expressions" in Ruby
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