ToCode

//...
  const [loading, setLoading] = useState<boolean>(false);
  const [data, setData] = useState<Item[] | null>(null);
  const [error, setError] = useState<Error | undefined>(undefined);

  useEffect(() => {
    const fetchData = async () => {
      setLoading(true);

      try {
        const response = await fetch("/api/users");

        if (!response.ok) {
          const error = await response.json();
          throw new Error(\Error: ${error.error || response.status}\);
        }

        const data = await response.json();
        setData(data);
      } catch (e) {
        setError(e as Error);
      } finally {
        setLoading(false);
      }
    };

    fetchData();
  }, []);

//...

  def demo1(): IO[ExitCode] =
    IO.println("Hello WOrld") >> IO.pure(ExitCode.Success)

  def demo11(): IO[ExitCode] =
    IO.sleep(1000.millis) >> IO.println("1") >>
    IO.sleep(1000.millis) >> IO.println("2") >>
    IO.sleep(1000.millis) >> IO.println("3") >>
    IO.pure(ExitCode.Success)

  def demo2(): IO[ExitCode] =
    for {
      _ <- IO.sleep(1000.millis) >> IO.println("1")
      _ <- IO.sleep(1000.millis) >> IO.println("2")
      _ <- IO.sleep(1000.millis) >> IO.println("3")
    } yield ExitCode.Success

  def demo3(): IO[ExitCode] =
    List(
      IO.sleep(1000.millis) >> IO.println("1"),
      IO.sleep(1000.millis) >> IO.println("2"),
      IO.sleep(1000.millis) >> IO.println("3")
    ).parSequence >> IO.pure(ExitCode.Success)

def randomDadJoke(): IO[String] =
  HttpClientCatsBackend.resource[IO]().use { backend =>
    basicRequest
      .header("Accept", "application/json")
      .get(uri"https://icanhazdadjoke.com/")
      .response(asString)
      .send(backend)
      .map {response => response.body.right.get}
  }

  def demo4(): IO[ExitCode] =
    randomDadJoke().map(s => println(s)) >> IO.pure(ExitCode.Success)

  def demo5(): IO[ExitCode] =
    List(
      randomDadJoke().map(s => println(s)),
      randomDadJoke().map(s => println(s)),
      randomDadJoke().map(s => println(s))
    ).parSequence >> IO.pure(ExitCode.Success)

)\.parSequence \>\> IO\.pure(ExitCode\.Success)

  def demo1(): IO[ExitCode] \=

    IO\.println("Hello WOrld") \>\> IO\.pure(ExitCode\.Success)

  def demo11(): IO[ExitCode] \=

    IO\.sleep(1000\.millis) \>\> IO\.println("1") \>\>

    IO\.sleep(1000\.millis) \>\> IO\.println("2") \>\>

    IO\.sleep(1000\.millis) \>\> IO\.println("3") \>\>

    IO\.pure(ExitCode\.Success)

  def demo2(): IO[ExitCode] \=

    for {

      _ <\- IO\.sleep(1000\.millis) \>\> IO\.println("1")

      _ <\- IO\.sleep(1000\.millis) \>\> IO\.println("2")

      _ <\- IO\.sleep(1000\.millis) \>\> IO\.println("3")

    } yield ExitCode\.Success

  def demo3(): IO[ExitCode] \=

    List(

      IO\.sleep(1000\.millis) \>\> IO\.println("1"),

      IO\.sleep(1000\.millis) \>\> IO\.println("2"),

      IO\.sleep(1000\.millis) \>\> IO\.println("3")

    )\.parSequence \>\> IO\.pure(ExitCode\.Success)

def randomDadJoke(): IO[String] \=

  HttpClientCatsBackend\.resource[IO]()\.use { backend \=\>

    basicRequest

      \.header("Accept", "application/json")

      \.get(uri"https://icanhazdadjoke\.com/")

      \.response(asString)

      \.send(backend)

      \.map {response \=\> response\.body\.right\.get}

  }

  def demo4(): IO[ExitCode] \=

    randomDadJoke()\.map(s \=\> println(s)) \>\> IO\.pure(ExitCode\.Success)

  def demo5(): IO[ExitCode] \=

    List(

      randomDadJoke()\.map(s \=\> println(s)),

      randomDadJoke()\.map(s \=\> println(s)),

      randomDadJoke()\.map(s \=\> println(s))

  def demo1(): IO[ExitCode] =
    IO.println("Hello WOrld") >> IO.pure(ExitCode.Success)

  def demo11(): IO[ExitCode] =
    IO.sleep(1000.millis) >> IO.println("1") >>
    IO.sleep(1000.millis) >> IO.println("2") >>
    IO.sleep(1000.millis) >> IO.println("3") >>
    IO.pure(ExitCode.Success)

  def demo2(): IO[ExitCode] =
    for {
      _ <- IO.sleep(1000.millis) >> IO.println("1")
      _ <- IO.sleep(1000.millis) >> IO.println("2")
      _ <- IO.sleep(1000.millis) >> IO.println("3")
    } yield ExitCode.Success

  def demo3(): IO[ExitCode] =
    List(
      IO.sleep(1000.millis) >> IO.println("1"),
      IO.sleep(1000.millis) >> IO.println("2"),
      IO.sleep(1000.millis) >> IO.println("3")
    ).parSequence >> IO.pure(ExitCode.Success)

def randomDadJoke(): IO[String] =
  HttpClientCatsBackend.resource[IO]().use { backend =>
    basicRequest
      .header("Accept", "application/json")
      .get(uri"https://icanhazdadjoke.com/")
      .response(asString)
      .send(backend)
      .map {response => response.body.right.get}
  }

  def demo4(): IO[ExitCode] =
    randomDadJoke().map(s => println(s)) >> IO.pure(ExitCode.Success)

  def demo5(): IO[ExitCode] =
    List(
      randomDadJoke().map(s => println(s)),
      randomDadJoke().map(s => println(s)),
      randomDadJoke().map(s => println(s))
    ).parSequence >> IO.pure(ExitCode.Success)

def createPost(g: GraphTraversalSource, slug: String, title: String, publishedAt: String): Vertex =
  g.addV("post")
    .property("slug", slug)
    .property("title", title)
    .property("publishedAt", LocalDateTime.parse(publishedAt, formatter))
    .next()