* For example, {@code join("-", '1', '2', '3')} returns the string {@code "1-2-3"}.
   *
   * @param separator the text that should appear between consecutive values in the resulting string
   *     (but not at the start or end)
   * @param array an array of {@code char} values, possibly empty
   */
  public static String join(String separator, char... array) {
    checkNotNull(separator);

  }

  /**
   * Returns a string containing the supplied {@code float} values, converted to strings as
   * specified by {@link Float#toString(float)}, and separated by {@code separator}. For example,
   * {@code join("-", 1.0f, 2.0f, 3.0f)} returns the string {@code "1.0-2.0-3.0"}.
   *
   * <p>Note that {@link Float#toString(float)} formats {@code float} differently in GWT. In the
   * previous example, it returns the string {@code "1-2-3"}.

  }

  /**
   * Returns a string containing the supplied {@code double} values, converted to strings as
   * specified by {@link Double#toString(double)}, and separated by {@code separator}. For example,
   * {@code join("-", 1.0, 2.0, 3.0)} returns the string {@code "1.0-2.0-3.0"}.
   *
   * <p>Note that {@link Double#toString(double)} formats {@code double} differently in GWT

                });
            }

            for (Thread t : threads) {
                t.start();
            }
            for (Thread t : threads) {
                t.join();
            }

            // Verify all arrays were signed
            for (byte[] arr : dataArrays) {
                byte[] signature = Arrays.copyOfRange(arr, SIGNATURE_OFFSET, SIGNATURE_OFFSET + SIGNATURE_LENGTH);

flag `--experimental-patches` is now deprecated and will be removed in a future release. You can migrate to using the new flag `--patches`. Add a new field `{Init|Join}Configuration.patches.directory` that can be used for the same purpose. For `init` and `join` it is now recommended that you migrate to configure patches via `{Init|Join}Configuration.patches.directory`. For the time being, these flags can be mixed with `--config`, but that might change in the future. On a command line, the last *patches...

            }
            final Object languages = req.getAttribute(Constants.REQUEST_LANGUAGES);
            if (languages != null) {
                searchLog.setLanguages(StringUtils.join((String[]) languages, ","));
            } else {
                searchLog.setLanguages(StringUtil.EMPTY);
            }

            @SuppressWarnings("unchecked")

Usas `which` en Linux y macOS y `Get-Command` en Windows PowerShell.

La forma en que funciona ese comando es que irá y revisará la variable de entorno `PATH`, pasando por **cada path en orden**, buscando el programa llamado `python`. Una vez que lo encuentre, te **mostrará el path** a ese programa.

La parte más importante es que cuando llamas a `python`, ese es el exacto "`python`" que será ejecutado.

            manager.stopAsync().awaitStopped();
          }
        };
    stoppingThread.start();
    // this should be super fast since the only non-stopped service is a NoOpService
    stoppingThread.join(1000);
    assertFalse("stopAsync has deadlocked!.", stoppingThread.isAlive());
    failLeave.countDown(); // release the background thread
  }

  /**

            builder.setSize(fessConfig.getPagingSearchPageMaxSizeAsInteger());
            builder.setFetchSource(fields, null);
            queryHelper.processSearchPreference(builder, userBean, String.join(StringUtil.EMPTY, docIds));
            return true;
        });
    }

    /**
     * Updates a single field of a document.
     *
     * @param id The document ID to update

            params.put("Referer", e.getReferer());
            params.put("Languages", e.getLanguages());
            params.put("Virtual Host", e.getVirtualHost());
            params.put("Roles", e.getRoles() != null ? String.join(" ", e.getRoles()) : StringUtil.EMPTY);
            params.put("User Agent", e.getUserAgent());
            e.getSearchFieldLogList().stream().forEach(p -> {
                params.put(p.getFirst(), p.getSecond());