arrow-core/arrow.core/flatten

flatten

fun <A, B> Either<A, Either<A, B>>.flatten(): Either<A, B>
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inline fun <A, B> Ior<A, Ior<A, B>>.flatten(SA: Semigroup<A>): Ior<A, B>
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fun <A> Iterable<Iterable<A>>.flatten(): List<A>
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fun <A> NonEmptyList<NonEmptyList<A>>.flatten(): NonEmptyList<A>
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fun <A> Option<Option<A>>.flatten(): Option<A>
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fun <A> Sequence<Sequence<A>>.flatten(): Sequence<A>
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