Function intersectionWith

repos/effect/packages/effect/src/Array.ts:3195–3207

(isEquivalent: (self: A, that: A) => boolean)

    that: T
  ): <S extends Iterable<any>>(
    self: S
  ) => ReadonlyArray.OrNonEmpty<S, T, ReadonlyArray.Infer<S> | ReadonlyArray.Infer<T>>
  <A, B>(self: NonEmptyReadonlyArray<A>, that: ReadonlyArray<B>): NonEmptyArray<A | B>
  <A, B>(self: ReadonlyArray<A>, that: NonEmptyReadonlyArray<B>): NonEmptyArray<A | B>
  <A, B>(self: Iterable<A>, that: Iterable<B>): Array<A | B>
} = dual(
  2,
  <A, B>(self: Iterable<A>, that: Iterable<B>): Array<A | B> => {
    const a = fromIterable(self)
    const b = fromIterable(that)
    if (isReadonlyArrayNonEmpty(a)) {
      return isReadonlyArrayNonEmpty(b) ? dedupe(appendAll(a, b)) : a
    }
    return b
  }
)