Ruby - Regular Expressions
Which of the following is a correct way to write a regex literal that matches any digit in Ruby?
Which of the following is a correct way to write a regex literal that matches any digit in Ruby?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Recall regex digit shorthand
In Ruby regex,\dmatches any digit character (0-9).Step 2: Check each option
/\d/ uses/\d/which is correct. /d/ matches literal 'd'. /[digit]/ matches any character 'd', 'i', 'g', 'i', 't'. /\D/ matches non-digit characters.Final Answer:
/\d/ -> Option AQuick Check:
Digit regex = /\d/ [OK]
Quick Trick: Use /\d/ to match digits in Ruby regex [OK]
Common Mistakes:
- Forgetting to escape backslash in regex literal
- Using /d/ which matches letter 'd', not digits
- Confusing \d with \D (non-digit)
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