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  1. import collection.mutable.ListBuffer
  2.  
  3. object MapUtils {
  4.     // var data : Map[String,ListBuffer[(String,Long)]] = Map()
  5.     val data = collection.mutable.Map[String, ListBuffer[(String, Long)]]()
  6.  
  7.     def addData(key : String, message : String) : Unit = {
  8.         val newTuple = (message, System.currentTimeMillis())
  9.         val optionalOldValue = data.get(key)
  10.  
  11.         optionalOldValue match {
  12.             case Some(olderBufferList) => olderBufferList += newTuple
  13.             case None => data
  14.                 .put(key, ListBuffer[(String, Long)](newTuple))
  15.         }
  16.     }
  17. }
  18.  
  19. object Main extends App {
  20.   MapUtils.addData("123", "message 1")
  21.   MapUtils.addData("456", "message 2")
  22.  
  23.   println(MapUtils.data)
  24.   // Map(456 -> ListBuffer((message 2,1472925061065)), 123 -> ListBuffer((message 1,1472925060926)))
  25. }
Success #stdin #stdout 0.17s 322432KB
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Map(456 -> ListBuffer((message 2,1472925612375)), 123 -> ListBuffer((message 1,1472925612333)))
https://ideone.com/B1Iji8
language:
Scala (scala 2.12.8)
created:
7 years ago
visibility:
public

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