Implement ZStream#intersperse #3514
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Let's make this a transducer instead, right? Then it's just a fold that inserts the element every even one: state.modify { flag =>
os.foldRight(Nil -> flag) {
case (o, (out, true)) => (a :: o :: out) -> false
case (o, (out, false)) => (o :: out) -> true
}
} |
iravid
reviewed
May 7, 2020
| /** | ||
| * Intersperse stream with provided element similar to <code>List.mkString</code>. | ||
| */ | ||
| final def intersperse[O1 >: O](middle: O1): ZStream[R, E, O1] = |
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@fagossa Could we add a variant that also adds start/end markers? This could simply be ZStream(start) ++ intersperse(middle) ++ ZStream(end).
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This is an implementation for
intersperse(#3440).For example: