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yangbajing/gist:2382583

Created April 14, 2012 07:10
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gistfile1.scala
def opt(paramA: Option[String], paramB: Option[Date], paramC: Option[Int]): Option[String] = {
for (
a <- paramA;
b <- paramB;
c <- paramC) yield {
a + " | " + b + " | " + c
}
}
println(opt(Some("羊八井", Some(new Date), Some(26)))
println(opt(None, Some(new Date), Some(26)))
println(opt(None, Some(new Date), Some(26)).getOrElse("我设个默认值"))
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