Nested

cats Nested 예제

 

import cats.data._
import cats.syntax.all._
import scala.util.{Success, Try}

object NestedExample {
  def main(args: Array[String]): Unit = {
    val someValue: Try[Option[Int]] = Success(2.some)

    val basicScala: Try[Option[Int]] = someValue.map(_.map(_ * 3))
    val catsScala: Try[Option[Int]]  = Nested(someValue).map(_ * 3).value
  }
}