File: hashsetremove.scala

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scala 2.11.12-5
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import scala.collection.mutable.HashSet


object Test extends App {
  val h = new HashSet[Int]
  h += 1
  println(s"remove 0 should be false, was ${h remove 0}")
  println(s"contains 1 should be true, was ${h contains 1}")
  println(s"remove 1 should be true, was ${h remove 1}")
  println(s"contains 1 should be false, was ${h contains 1}")
  println(s"remove 1 should be false, was ${h remove 1}")
  println(s"contains 1 should be false, was ${h contains 1}")
 }