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a guest Sep 20th, 2018 74 Never
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  1.   def using[T <: { def close(): Unit }, S](objects: Seq[T])(operation: Seq[T] => S) = {
  2.     val result = try {
  3.       operation(objects)
  4.     } finally {
  5.       objects.foreach(_.close())
  6.     }
  7.  
  8.     result
  9.   }
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