How to pattern match using regular expression in Scala?

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You can do this because regular expressions define extractors but you need to define the regex pattern first. I don’t have access to a Scala REPL to test this but something like this should work.

val Pattern = "([a-cA-C])".r
word.firstLetter match {
   case Pattern(c) => c bound to capture group here
   case _ =>
}

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