return output;
    }

    /**
     * Checks whether this mapping item has pending updates.
     *
     * @return true if both newInputs and newOutput are not null, indicating pending updates
     */
    public boolean isUpdated() {
        return newInputs != null && newOutput != null;
    }

    /**
     * Checks whether this mapping item is marked for deletion.

     *
     * @param allPageCount the total page count
     */
    public void setAllPageCount(final int allPageCount) {
        this.allPageCount = allPageCount;
    }

    /**
     * Checks if there is a previous page available.
     *
     * @return true if there is a previous page, false otherwise
     */
    public boolean isExistPrePage() {
        return existPrePage;
    }

    /**

        assertEquals(1, oldAddresses.size());

        // Check IPv4 address
        WitnessNotification.WitnessIPAddress newIPv4 = newAddresses.get(0);
        assertEquals(ipv4, newIPv4.getAddress());
        assertTrue(newIPv4.isIPv4());
        assertFalse(newIPv4.isIPv6());
        assertEquals(WitnessNotification.WitnessIPAddress.IPV4, newIPv4.getFlags());

        // Check IPv6 address

本例把 `item_id` 的类型声明为 `int`。

/// check | 检查

类型声明将为函数提供错误检查、代码补全等编辑器支持。

///

## 数据<abbr title="也称为：序列化、解析">转换</abbr>

运行示例并访问 <a href="http://127.0.0.1:8000/items/3" class="external-link" target="_blank">http://127.0.0.1:8000/items/3</a>，返回的响应如下：

```JSON
{"item_id":3}
```

/// check | 检查

注意，函数接收并返回的值是 `3`（ `int`），不是 `"3"`（`str`）。

   * this class ({@code Resources}) will be used instead.
   *
   * @throws IllegalArgumentException if the resource is not found
   */
  @CanIgnoreReturnValue // being used to check if a resource exists
  // TODO(cgdecker): maybe add a better way to check if a resource exists
  // e.g. Optional<URL> tryGetResource or boolean resourceExists
  public static URL getResource(String resourceName) {
    ClassLoader loader =

import org.codehaus.plexus.configuration.PlexusConfiguration;

/**
 * Service responsible for validating plugin configuration.
 *
 */
public interface MavenPluginConfigurationValidator {
    /**
     * Checks mojo configuration issues.
     */
    void validate(
            MavenSession mavenSession,
            MojoDescriptor mojoDescriptor,
            Class<?> mojoClass,
            PlexusConfiguration pomConfiguration,

 * array. If any method encounters the end of the array prematurely, it throws {@link
 * IllegalStateException} to signify <i>programmer error</i>. This behavior is a technical violation
 * of the supertype's contract, which specifies a checked exception.
 *
 * @author Kevin Bourrillion
 * @since 1.0
 */
@J2ktIncompatible
@GwtIncompatible
public interface ByteArrayDataInput extends DataInput {
  @Override
  void readFully(byte[] b);

 * Implementations of this interface handle specific types of web API requests
 * by matching incoming requests and processing them accordingly.
 */
public interface WebApiManager {

    /**
     * Checks if the request matches this API manager.
     * @param request The HTTP servlet request.
     * @return True if the request matches, false otherwise.
     */
    boolean matches(HttpServletRequest request);

    /**

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package target

import (
	"database/sql"
	"slices"
	"testing"
)

// TestPostgreSQLRegistration checks if postgres driver
// is registered and fails otherwise.
func TestPostgreSQLRegistration(t *testing.T) {
	var found bool
	if slices.Contains(sql.Drivers(), "postgres") {
		found = true
	}
	if !found {

#!/usr/bin/env bash
set -x

ruff check fastapi tests docs_src scripts --fix