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18 lines
490 B
Plaintext
18 lines
490 B
Plaintext
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// Optional values
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val s: Option[Int] = Some(22)
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val n: Option[Int] = None
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// Removing optional values from a collection
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val listOfOptions: List[Option[Int]] = List(Some(1), None, Some(2), None, None, Some(3))
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listOfOptions.flatten // returns List(1, 2, 3)
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// Get the value out of an option
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Some(5).get // returns 5
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// Handling None
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// BAD
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None.get // This will throw java.util.NoSuchElementException
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// GOOD
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None.getOrElse(1) // This will handle the exception and return 1
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