Created
April 15, 2011 06:24
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Scala2.8.1でList[java.util.Date].min
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| scala> trait DateOrdering extends scala.math.Ordering[java.util.Date] { | |
| | def compare(x: java.util.Date, y: java.util.Date) = x.compareTo(y) | |
| | } | |
| defined trait DateOrdering | |
| scala> implicit object Date extends DateOrdering | |
| defined module Date | |
| scala> List(new java.util.Date()).min | |
| res6: java.util.Date = Fri Apr 15 15:16:18 JST 2011 |
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