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eamelink/Nine.scala

Last active August 29, 2015 14:16
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Nine.scala
case class Nine private(inner: String)
object Nine {
def apply(value: String): Option[Nine] =
if(value.last == "9") Some(new Nine(value)) else None
}
val x = Nine("123") // None
val y = Nine("789") // Some(Nine("789"))
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