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object Test {
def main(args: Array[String]): Unit = {
assert(List.iterate(List(1,2,3), 4)(_.tail).last.isEmpty)
assert(Stream.iterate(Stream(1,2,3), 4)(_.tail).last.isEmpty)
assert(Array.iterate(Array(1,2,3), 4)(_.tail).last.isEmpty)
}
}
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