Scala try Monad

When the input data format is not correct, there will be a outofindex error in Activitydata, but more often we only care about the desired results and do not want to know what the error, and then write such a code def parseCSV(csv : String) = {    try {      Some {        csv.split( "\n" ).map { line = >          val tokens = line.split( ";" )          ActivityData(tokens( 0 ).toLong, tokens( 1 ).toInt, tokens( 2 ).toInt, tokens( 3 ).toLong)        }      }    } catch {      case _ : Throwable = > None    } }And after import Scala.util.Try, we can write this code. def parseCSV(csv : String) = Try {    csv.split( "\n" ).map { line = >      val tokens = line.split( ";" )      ActivityData(tokens( 0 ).toLong, tokens( 1 ).toInt, tokens( 2 ).toInt, tokens( 3 ).toLong)    } }Like option, Try has two possibilities of success and fail, and the usage and option type parseCSV(csvdata).map { entries = >    //do something with the data }.getOrElse {    BadRequest( "Invalid CSV Data" )  //this is Play Framework specific (returns a 400 HTTP response with a message) }The reason we can do this is that Try is monad, and when everything is normal, it returns Success (something) and returns Failure (error) when it fails

Scala try Monad