Alias for ap.
Apply.ap. Example:
scala> import cats.syntax.all._ scala> val someF: Option[Int => Long] = Some(_.toLong + 1L) scala> val noneF: Option[Int => Long] = None scala> val someInt: Option[Int] = Some(3) scala> val noneInt: Option[Int] = None scala> someF.ap(someInt) res0: Option[Long] = Some(4) scala> noneF.ap(someInt) res1: Option[Long] = None scala> someF.ap(noneInt) res2: Option[Long] = None scala> noneF.ap(noneInt) res3: Option[Long] = None