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bigjason/drunk.scala

Created May 11, 2015 16:39
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drunk.scala
scala> val mayBeLong: Option[Long] = Option(null: java.lang.Long)
java.lang.NullPointerException
at scala.Predef$.Long2long(Predef.scala:358)
... 33 elided
scala> val mayBeLong: Option[Long] = Option(null: java.lang.Long).flatMap(Option.apply _)
<console>:7: error: type mismatch;
found : java.lang.Long => Option[java.lang.Long]
required: java.lang.Long => Option[scala.Long]
val mayBeLong: Option[Long] = Option(null: java.lang.Long).flatMap(Option.apply _)
^
scala> val mayBeLong: Option[Long] = Option(null: java.lang.Long).flatMap(Option.apply(_))
mayBeLong: Option[Long] = None
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