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import collection._
object Test {
class AlarmingBuffer[T] extends mutable.ArrayBuffer[T] {
override def sizeHint(x: Int): Unit = {
println("Received a size hint: " + x)
super.sizeHint(x)
}
}
def main(args: Array[String]): Unit = {
val iteratorBuilder = (new AlarmingBuffer[Int]) mapResult {
res => res.iterator
}
iteratorBuilder.sizeHint(10)
iteratorBuilder ++= (0 until 10)
iteratorBuilder.result.foreach(println)
}
}
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