WebYou should not have nulls in scala... You have Option for that. So your list type signature should be List[Option[Any]] then you should be able to collect values: List(None, Some(1), Some("2")).collect{case Some(a) => a.toString.toInt}.Nevertheless you can List(null, 1, "2").map(Option(_)) and then collect (or just use if a != null guard in case statement, but … WebAfter import scala.util.Try, consider implicit class RichOptionConvert(val s: String) extends AnyVal { def toOptInt() = Try (s.toInt) toOption } or similarly but in a bit more elaborated form that addresses only the relevant exception in converting onto integral values, after import java.lang.NumberFormatException ,

Type Declaration in Scala Baeldung on Scala

Your function is likely designed very poorly. 99% of the time there is a better way, then just returning Any from an API entry point. If you insist on having to deal with Any, a safe way to convert it to an int would be something like this: def toInt(x: Any): Option[Int] = x match { case i: Int => Some(i) case _ => None } WebDec 7, 2024 · int a = (int) 100.00; But in Scala, you use the to* methods, as shown in this recipe. If you want to avoid potential conversion errors when casting from one numeric type to another, you can use the related isValid methods to test whether the type can be converted before attempting the conversion. globe and mail ibbitson

A First Look at Types Scala 3 — Book Scala Documentation

WebType Casting Value types can be cast in the following way: For example: Scala 2 and 3 val x: Long = 987654321 val y: Float = x.toFloat // 9.8765434E8 (note that some precision is lost in this case) val face: Char = '☺' val number: Int = face // 9786 Casting is unidirectional. This will not compile: Scala 2 and 3 WebFeb 11, 2024 · You can convert it to list of integers as follows: val lAsInts = l.map { case i: Int => i case d: Double => d.toInt case s: String => s.toDouble.toInt } println (lAsInts) This … boger city united methodist preschool