Scala capture group using regex

Question

Let\'s say I have this code:

val string = \"one493two483three\"
val pattern = \"\"\"two(\\d+)three\"\"\".r
pattern.findAllIn(string).foreach(println)
         


        

Answer 1

def extractFileNameFromHttpFilePathExpression(expr: String) = {
//define regex
val regex = "http4.*\\/(\\w+.(xlsx|xls|zip))$".r
// findFirstMatchIn/findAllMatchIn returns Option[Match] and Match has methods to access capture groups.
regex.findFirstMatchIn(expr) match {
  case Some(i) => i.group(1)
  case None => "regex_error"
}
}
extractFileNameFromHttpFilePathExpression(
    "http4://testing.bbmkl.com/document/sth1234.zip")