public void add(double x, double y) {
    // We extend the recursive expression for the one-variable case at Art of Computer Programming
    // vol. 2, Knuth, 4.2.2, (16) to the two-variable case. We have two value series x_i and y_i.
    // We define the arithmetic means X_n = 1/n \sum_{i=1}^n x_i, and Y_n = 1/n \sum_{i=1}^n y_i.
    // We also define the sum of the products of the differences from the means

### Contêineres com Múltiplos Processos e Casos Especiais

Claro, existem **casos especiais** em que você pode querer ter um **contêiner** com um **gerenciador de processos Gunicorn** iniciando vários **processos trabalhadores Uvicorn** dentro.

ant-observability/fastapi/e559ec64-f765-4470-a15f-1901fcebb468 title: How to monitor FastAPI application performance using Python agent - author: Jean-Baptiste Rocher author_link: https://hashnode.com/@jibrocher link: https://dev.indooroutdoor.io/series/fastapi-react-poll-app title: Building the Poll App From Django Tutorial With FastAPI And React - author: Silvan Melchior author_link: https://github.com/silvanmelchior link: https://blog.devgenius.io/seamless-fastapi-configuration-with-confz-90949c14ea12...

[Prometheus](https://prometheus.io) is a cloud-native monitoring platform. Prometheus offers a multi-dimensional data model with time series data identified by metric name and key/value pairs. The data collection happens via a pull model over HTTP/HTTPS. Users looking to monitor their MinIO instances can point Prometheus configuration to scrape data from following endpoints. 

 * </ul>
 *
 * <p>Advantages compared to {@link com.google.common.collect.ImmutableList ImmutableList}{@code
 * <Long>}:
 *
 * <ul>
 *   <li>Improved memory compactness and locality.
 *   <li>Can be queried without allocating garbage.
 *   <li>Access to {@code LongStream} features (like {@link LongStream#sum}) using {@code stream()}
 *       instead of the awkward {@code stream().mapToLong(v -> v)}.
 * </ul>
 *

 * </ul>
 *
 * <p>Advantages compared to {@link com.google.common.collect.ImmutableList ImmutableList}{@code
 * <Integer>}:
 *
 * <ul>
 *   <li>Improved memory compactness and locality.
 *   <li>Can be queried without allocating garbage.
 *   <li>Access to {@code IntStream} features (like {@link IntStream#sum}) using {@code stream()}
 *       instead of the awkward {@code stream().mapToInt(v -> v)}.
 * </ul>
 *

 *   crawler.close();
 * </pre>
 */
public class Crawler implements Runnable, AutoCloseable {

    private static final Logger logger = LogManager.getLogger(Crawler.class);

    /**
     * Service for managing URL queues during crawling.
     */
    @Resource
    protected UrlQueueService<UrlQueue<?>> urlQueueService;

    /**
     * Service for managing access result data.
     */
    @Resource

An additional header `X-Minio-Replication-Delete-Status` is returned which would show `PENDING` or `FAILED` status if the replication is still not caught up.

La primera siempre será utilizada ya que el path coincide primero.

## Valores predefinidos

Si tienes una *path operation* que recibe un *path parameter*, pero quieres que los valores posibles válidos del *path parameter* estén predefinidos, puedes usar un <abbr title="Enumeration">`Enum`</abbr> estándar de Python.

### Crear una clase `Enum`

# Seguridad - Primeros pasos

Imaginemos que tienes tu API de **backend** en algún dominio.

Y tienes un **frontend** en otro dominio o en un path diferente del mismo dominio (o en una aplicación móvil).

Y quieres tener una forma para que el frontend se autentique con el backend, usando un **username** y **password**.

Podemos usar **OAuth2** para construir eso con **FastAPI**.