Ruby - Regular Expressions
Which Ruby method returns a hash of named captures after a regex match?
Which Ruby method returns a hash of named captures after a regex match?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Identify method returning named captures hash
String#match returns a MatchData object which has a named_captures method returning a hash.Step 2: Eliminate other options
String#scan returns arrays of matches, Regexp#named_captures returns a hash of group names to patterns, not match results, Regexp#captures returns array of captures without names.Final Answer:
String#match -> Option BQuick Check:
Named captures hash = String#match [OK]
Quick Trick: Use String#match to get named captures hash [OK]
Common Mistakes:
- Using String#scan expecting named captures hash
- Confusing Regexp#named_captures with match results
- Expecting Regexp#captures to return named keys
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