Scala: convert string to Int or None
问题 I am trying to get a number out of an xml field ... <Quantity>12</Quantity> ... via Some((recipe \ "Main" \ "Quantity").text.toInt) Sometimes there may not be a value in the xml, though. The text will be "" and this throws an java.lang.NumberFormatException. What is a clean way to get either an Int or a None? 回答1: scala> import scala.util.Try import scala.util.Try scala> def tryToInt( s: String ) = Try(s.toInt).toOption tryToInt: (s: String)Option[Int] scala> tryToInt("123") res0: Option[Int]