Skip to end of metadata
Go to start of metadata

You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 18 Next »

Groovy supports regular expressions natively using the ~"..." expression, which compiles a Java Pattern object from the given string. Groovy also supports the =~ (create Matcher) and ==~ (matches regex) operators.

For matchers having groups, matcher[index] is either a matched String or a List of matched group Strings, since jsr-03 release.

The last example can also benefit from the other string literal notation which allows us to avoid having to double all the backslash escaping characters.

Since a Matcher coerces to a boolean by calling its find method, the =~ operator is consistent with the simple use of Perl's =~ operator, when it appears as a predicate (in 'if', 'while', etc.). The "stricter-looking" ==~ operator requires an exact match of the whole subject string.

Regular expression support is imported from Java. Java's regular expression language and API is documented here.

  • No labels