pkg crypto/elliptic, method (*CurveParams) Add //deprecated #34648
pkg crypto/elliptic, method (*CurveParams) Double //deprecated #34648
pkg crypto/elliptic, method (*CurveParams) IsOnCurve //deprecated #34648
pkg crypto/elliptic, method (*CurveParams) ScalarBaseMult //deprecated #34648
pkg crypto/elliptic, method (*CurveParams) ScalarMult //deprecated #34648
pkg crypto/elliptic, type Curve interface, Add //deprecated #52221

            // required check
            if (!dataMap.containsKey(fessConfig.getIndexFieldUrl()) || dataMap.get(fessConfig.getIndexFieldUrl()) == null) {
                logger.warn("Could not add document: url field is missing or null");
                return;
            }

            final String url = dataMap.get(fessConfig.getIndexFieldUrl()).toString();

When writing request headers, use `header(name, value)` to set the only occurrence of `name` to `value`. If there are existing values, they will be removed before the new value is added. Use `addHeader(name, value)` to add a header without removing the headers already present.

//   // forward `op`.
//   return new AddGradientFunction;
// }
//
// Status RegisterGradients(GradientRegistry* registry) {
//   return registry->Register("Add", AddRegisterer);
// }
class GradientFunction {
 public:
  virtual absl::Status Compute(
      AbstractContext* ctx,
      absl::Span<AbstractTensorHandle* const> grad_outputs,

        val equalsOffset = indexOf('=', pos)
        if (equalsOffset == -1 || equalsOffset > ampersandOffset) {
          result.add(substring(pos, ampersandOffset))
          result.add(null) // No value for this name.
        } else {
          result.add(substring(pos, equalsOffset))
          result.add(substring(equalsOffset + 1, ampersandOffset))
        }
        pos = ampersandOffset + 1
      }
      return result

    private val coordinates: String
) : ComponentMetadataRule {
    override fun execute(context: ComponentMetadataContext) {
        context.details.allVariants {
            withDependencies {
                add(coordinates)
            }
        }
    }
}


abstract class DependencyRemovalByGroupRule @Inject constructor(
    private val groupsToRemove: Set<String>
) : ComponentMetadataRule {

    return new ImmutableValueGraph.Builder<>(castBuilder);
  }

  /**
   * Specifies whether the graph will allow self-loops (edges that connect a node to itself).
   * Attempting to add a self-loop to a graph that does not allow them will throw an {@link
   * UnsupportedOperationException}.
   *
   * <p>The default value is {@code false}.
   */
  @CanIgnoreReturnValue

它可以是 `async def` 或普通的 `def` 函数，**FastAPI** 知道如何正确处理。

在这种情况下，任务函数将写入一个文件（模拟发送电子邮件）。

由于写操作不使用 `async` 和 `await`，我们用普通的 `def` 定义函数：

{* ../../docs_src/background_tasks/tutorial001_py310.py hl[6:9] *}

## 添加后台任务 { #add-the-background-task }

在你的 *路径操作函数* 里，用 `.add_task()` 方法将任务函数传到 *后台任务* 对象中：

{* ../../docs_src/background_tasks/tutorial001_py310.py hl[14] *}

`.add_task()` 接收以下参数：

* 在后台运行的任务函数(`write_notification`)。

        // Null
        assertFalse(IpAddressUtil.isIPv6Address(null));
    }

    @Test
    public void testFormatForUrl() {
        // IPv6 addresses - should add brackets
        assertEquals("[::1]", IpAddressUtil.formatForUrl("::1"));
        assertEquals("[2001:db8::1]", IpAddressUtil.formatForUrl("2001:db8::1"));
        assertEquals("[fe80::1]", IpAddressUtil.formatForUrl("fe80::1"));

## Required query parameters { #required-query-parameters }

When you declare a default value for non-path parameters (for now, we have only seen query parameters), then it is not required.

If you don't want to add a specific value but just make it optional, set the default as `None`.

But when you want to make a query parameter required, you can just not declare any default value: