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object Test {
val num1: Stream[Int] = 1 #:: num1.map(_ + 1)
val num2: Stream[Int] = 1 #:: num2.iterator.map(_ + 1).toStream
def main(args: Array[String]): Unit = {
val x1 = (num1 take 10).toList
val x2 = (num2 take 10).toList
assert(x1 == x2)
}
}
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