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by airless_bar
3677 days ago
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The whole point of this was to show that Scala's types preserve the structure of the computation. It might not be very interesting in the Option[Option[String]] case but imagine Try[Either[String, Int]] or List[Future[Double]]. It's a very important distinction. Collapsing cases is one of the primary thing why exceptions sometimes get a bad rap, and Kotlin (and Ceylon) do the same with ? (and |, &) at the value level. |
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