Function interleave

packages/effect/test/Stream.test.ts:4018–4054

(
          bools: ReadonlyArray<boolean>,
          numbers1: ReadonlyArray<number>,
          numbers2: ReadonlyArray<number>
        )

    it.effect("interleaveWith", () =>
      Effect.gen(function*() {
        const interleave = (
          bools: ReadonlyArray<boolean>,
          numbers1: ReadonlyArray<number>,
          numbers2: ReadonlyArray<number>
        ): ReadonlyArray<number> =>
          pipe(
            Array.head(bools),
            Option.map((head) => {
              if (head) {
                if (Array.isReadonlyArrayNonEmpty(numbers1)) {
                  const head = pipe(numbers1, Array.getUnsafe(0))
                  const tail = pipe(numbers1, Array.drop(1))
                  return pipe(
                    interleave(pipe(bools, Array.drop(1)), tail, numbers2),
                    Array.prepend(head)
                  )
                }
                if (Array.isReadonlyArrayNonEmpty(numbers2)) {
                  return interleave(pipe(bools, Array.drop(1)), Array.empty<number>(), numbers2)
                }
                return Array.empty<number>()
              }
              if (Array.isReadonlyArrayNonEmpty(numbers2)) {
                const head = pipe(numbers2, Array.getUnsafe(0))
                const tail = pipe(numbers2, Array.drop(1))
                return pipe(
                  interleave(pipe(bools, Array.drop(1)), numbers1, tail),
                  Array.prepend(head)
                )
              }
              if (Array.isReadonlyArrayNonEmpty(numbers1)) {
                return interleave(pipe(bools, Array.drop(1)), numbers1, Array.empty<number>())
              }
              return Array.empty<number>()
            }),
            Option.getOrElse(() => Array.empty<number>())
          )
        const boolStream = Stream.make(true, true, false, true, false)
        const stream1 = Stream.make(1, 2, 3, 4, 5)
        const stream2 = Stream.make(4, 5, 6, 7, 8)