Scala: convert string to Int or None
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?
Answer
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] = Some(123)
scala> tryToInt("")
res1: Option[Int] = None