// There should be at least half correct entries, if not return failure
	expectedRQuorum := len(partsMetadata) / 2
	if defaultParityCount == 0 {
		// if parity count is '0', we expected all entries to be present.
		expectedRQuorum = len(partsMetadata)
	}

	reducedErr := reduceReadQuorumErrs(ctx, errs, objectOpIgnoredErrs, expectedRQuorum)
	if reducedErr != nil {
		return FileInfo{}, reducedErr
	}

Pero antes de eso, manejar el código asíncrono era mucho más complejo y difícil.

En versiones previas de Python, podrías haber usado hilos o [Gevent](https://www.gevent.org/). Pero el código es mucho más complejo de entender, depurar y razonar.

En versiones previas de NodeJS / JavaScript en el Navegador, habrías usado "callbacks". Lo que lleva al "callback hell".

        HttpServletRequest request = createMockRequest();
        HttpServletResponse response = createMockResponse();

        corsHandler.process(testOrigin, request, response);

        // Check all CORS headers are present
        assertNotNull(responseHeaders.get("Access-Control-Allow-Origin"), "Allow-Origin header should be set");
        assertNotNull(responseHeaders.get("Access-Control-Allow-Methods"), "Allow-Methods header should be set");

        getFirstAddress();
        for (;;) {
            try {
                doConnect();
                return;
            } catch (final SmbAuthException sae) {
                throw sae; // Prevents account lockout on servers with multiple IPs
            } catch (final SmbException se) {
                if (getNextAddress() == null) {
                    throw se;
                }

     *     service is the origin of the stream. When zero, the origin is specified in the `origin`
     *     parameter.
     * @param origin when present, the [origin](http://tools.ietf.org/html/rfc6454) is typically
     *     represented as a combination of scheme, host and port. When empty, the origin is that of
     *     the `streamId`.

   * GWT SortedMap implementation that we delegate to throws
   * NullPointerException if the comparator does. Since our construction
   * methods ensure that null is never present in the map, it's OK for the
   * comparator to look for it wherever it wants.
   *
   * Note that we do NOT touch the comparator returned by comparator(), which

                    context.userProperties::get,
                    context.systemProperties::get));
        }

        // below we use effective properties as both system + user are present
        // core extensions
        try {
            context.extensions = readCoreExtensionsDescriptor(context);
        } catch (Exception e) {
            context.parsingFailed = true;

     * The mojo started event is also captured to determine the lifecycle
     * phases the project has been through.
     *
     * @param event the execution event
     */
    private void processEvent(ExecutionEvent event) {
        MavenProject project = event.getProject();
        switch (event.getType()) {
            case MojoStarted:
                String phase = event.getMojoExecution().getLifecyclePhase();

Davor war der Umgang mit asynchronem Code jedoch deutlich komplexer und schwieriger.

In früheren Versionen von Python hätten Sie Threads oder [Gevent](https://www.gevent.org/) verwenden können. Der Code ist jedoch viel komplexer zu verstehen, zu debuggen und nachzuvollziehen.

        keyList.tail = node;
      }
    } else { // non-empty list, insert before nextSibling
      /*
       * requireNonNull is safe as long as callers pass a nextSibling that (a) has the same key and
       * (b) is present in the multimap. (And they do, except maybe in case of concurrent
       * modification, in which case all bets are off.)
       */
      KeyList<K, V> keyList = requireNonNull(keyToKeyList.get(key));
      keyList.count++;