export function zipChunks<A, A2, A3>(
  leftChunk: Chunk<A>,
  rightChunk: Chunk<A2>,
  f: (a: A, b: A2) => A3
): readonly [Chunk<A3>, Either<Chunk<A>, Chunk<A2>>] {
  const leftChunkSize = leftChunk.size
  const rightChunkSize = rightChunk.size
  return leftChunkSize > rightChunkSize
    ? [
      leftChunk.take(rightChunkSize).zipWith(rightChunk, f),
      Either.left(leftChunk.drop(rightChunkSize))
    ]
    : [
      leftChunk.zipWith(rightChunk.take(leftChunkSize), f),
      Either.right(rightChunk.drop(leftChunkSize))
    ]
}