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ReSTARTR/OptionTypeTest.scala

Created May 18, 2011 14:21
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Option型の動作確認
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OptionTypeTest.scala
// execute in REPL
def testA(x:Boolean):Option[String] = if (x) Some("hoge") else None
testA(true) // Option[String] = Some(hoge)
testA(false) // Option[String] = None
testA(false).getOrElse("moge") // String = moge
testA(false).getOrElse(false) // Any = false
val result = testA(false).getOrElse("moge") // String = moge
val result = testA(false).getOrElse(false) // Any = false
val result:String = testA(false).getOrElse(false) // compile error
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