gistfile1.txt

val in: InputStream
val buffer: Array[Byte]
val stream: Stream[Array[Byte]] =
  Stream.continually(in.read(buffer)).takeWhile(-1 !=).map(buffer take)
val iterator: Iterator[Array[Byte]] =
  Iterator.continually(in.read(buffer)).takeWhile(-1 !=).map(buffer take)

stream.foreach(println) // the byte arrays stay
iterator.foreach(println) // the byte arrays go (some time)

// run on forever