Just like this. See this sample.
scala> val a = Some("hoge") a: Some[String] = Some(hoge) scala> a.get res0: String = hoge scala> val b = None b: None.type = None scala> b.isDefined res1: Boolean = false scala> a.isDefined res2: Boolean = true scala> a.isEmpty res3: Boolean = false scala> b.isEmpty res4: Boolean = true
