Computer scienceProgramming languagesScalaControl flowControl structures

For-comprehension

For-comprehension with None

Report a typo

You know that for-comprehension can be used for Option. What happens if it is applied to None?

def countNonEmptyLength(stringOpt: Option[String]): Option[Int] =
  for
    string <- stringOpt
    if string.nonEmpty
  yield string.size


countNonEmptyLength(None)

Select one option from the list

The function will throw an exception

The function will return None

The code will not compile

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