How to check whether a String fully matches a Regex in Scala?

Question

Assume I have a Regex pattern I want to match many Strings to.

val Digit = \"\"\"\\d\"\"\".r

I just want to check whether a given String fu

Answer 1

For the full match you may use unapplySeq. This method tries to match target (whole match) and returns the matches.

scala> val Digit = """\d""".r
Digit: scala.util.matching.Regex = \d

scala> Digit unapplySeq "1"
res9: Option[List[String]] = Some(List())

scala> Digit unapplySeq "123"
res10: Option[List[String]] = None

scala> Digit unapplySeq "string"
res11: Option[List[String]] = None