* {@code key} (or zero, if there is none) is passed as the first argument to {@code
   * accumulatorFunction}, and {@code x} is passed as the second argument.
   *
   * @since 21.0
   */
  @CanIgnoreReturnValue
  public long accumulateAndGet(K key, long x, LongBinaryOperator accumulatorFunction) {
    checkNotNull(accumulatorFunction);

* **`400`** y superiores son para responses de "Error del Cliente". Este es el segundo tipo que probablemente más usarías.
    * Un ejemplo es `404`, para un response "Not Found".
    * Para errores genéricos del cliente, puedes usar simplemente `400`.

		{"driver.Valuer equal", ModifyAt{Time: now, Valid: true}, ModifyAt{Time: now, Valid: true}, true},
		{"driver.Valuer not equal", ModifyAt{Time: now, Valid: true}, ModifyAt{Time: now.Add(time.Second), Valid: true}, false},
		{"driver.Valuer equal (ptr to nil ptr)", (*ModifyAt)(nil), &ModifyAt{}, false},
	}
	for _, test := range assertEqualTests {
		t.Run(test.name, func(t *testing.T) {

* Luego devuelve la **response**.

/// note | Detalles Técnicos

Si tienes dependencias con `yield`, el código de salida se ejecutará *después* del middleware.

Si hubiera alguna tarea en segundo plano (documentada más adelante), se ejecutará *después* de todo el middleware.

///

## Crear un middleware

Para crear un middleware usas el decorador `@app.middleware("http")` encima de una función.

        byte[] data1 = new byte[] { 0x01, 0x02, 0x03, 0x04 };
        digest.update(data1, 0, data1.length);
        byte[] result1 = digest.digest();
        assertNotNull(result1);

        // Second cycle
        byte[] data2 = new byte[] { 0x05, 0x06, 0x07, 0x08 };
        digest.update(data2, 0, data2.length);
        byte[] result2 = digest.digest();
        assertNotNull(result2);

        // Test first host
        NbtAddress result = lmhosts.getByName("TESTHOST", mockContext);
        assertNotNull(result);
        assertEquals("TESTHOST", result.getHostName());

        // Test second host
        result = lmhosts.getByName("SERVER01", mockContext);
        assertNotNull(result);
        assertEquals("SERVER01", result.getHostName());
    }

    @Test

        SMBUtil.writeInt4(10, buffer, notifyOffset + 8); // FileNameLength
        System.arraycopy("file1".getBytes("UnicodeLittleUnmarked"), 0, buffer, notifyOffset + 12, 10);

        // Second notification at offset 120 (80 + 40)
        notifyOffset = 120;
        SMBUtil.writeInt4(44, buffer, notifyOffset); // NextEntryOffset
        SMBUtil.writeInt4(2, buffer, notifyOffset + 4); // Action (REMOVED)

		var c *metacache
		if rpc == nil {
			resp := localMetacacheMgr.getBucket(ctx, o.Bucket).findCache(*o)
			c = &resp
		} else {
			rctx, cancel := context.WithTimeout(ctx, 5*time.Second)
			c, err = rpc.GetMetacacheListing(rctx, *o)
			cancel()
		}
		if err != nil {
			if errors.Is(err, context.Canceled) {
				// Context is canceled, return at once.

)

func findSecondIndex(s string, substr string) int {
	first := strings.Index(s, substr)
	if first == -1 {
		return -1
	}
	second := strings.Index(s[first+1:], substr)
	if second == -1 {
		return -1
	}
	return first + second + 1
}

// splitPath splits a path into a top-level directory and a child item. The
// parent directory retains the trailing slash.

        byte[] nonce2 = context.generateSecureNonce();

        // Then
        assertNotNull(nonce1, "First secure nonce should not be null");
        assertNotNull(nonce2, "Second secure nonce should not be null");
        assertFalse(Arrays.equals(nonce1, nonce2), "Secure nonces should be different");
        assertTrue(nonce1.length > 0, "Secure nonce should have proper length");
    }