}
```

當然，你可以同時定義部分參數為必填、部分有預設值、部分為選填：

{* ../../docs_src/query_params/tutorial006_py310.py hl[8] *}

在此例中，有 3 個查詢參數：

* `needy`，必填的 `str`。
* `skip`，具有預設值 `0` 的 `int`。
* `limit`，選填的 `int`。

/// tip | 提示

你也可以像在[路徑參數](path-params.md#predefined-values)中一樣使用 `Enum`。

	const input = "1234 5678 1234567901234567890"
	scanner := bufio.NewScanner(strings.NewReader(input))
	// Create a custom split function by wrapping the existing ScanWords function.
	split := func(data []byte, atEOF bool) (advance int, token []byte, err error) {
		advance, token, err = bufio.ScanWords(data, atEOF)
		if err == nil && token != nil {
			_, err = strconv.ParseInt(string(token), 10, 32)
		}
		return
	}

                    }

                    final BoolQueryBuilder readingQueryBuilder = QueryBuilders.boolQuery().minimumShouldMatch(1);
                    final int readingNum = readingList.size();
                    for (int readingCount = 0; readingCount < readingNum; readingCount++) {
                        final String reading = readingList.get(readingCount);

            .map(String::trim)
            .filter(s -> !s.isEmpty())
            .collect(Collectors.toList());
    }

    private record ExecResult(
        String stdout,
        String stderr,
        int returnCode
    ) {
        @Override
        public String toString() {
            return "ExecResult{returnCode=" + returnCode + ", stdout=" + summarize(stdout) + ", stderr=" + summarize(stderr) + "}";
        }

   * target())}. The hashcode of an unordered {@link EndpointPair} is equal to {@code
   * nodeU().hashCode() + nodeV().hashCode()}.
   */
  @Override
  public abstract int hashCode();

  private static final class Ordered<N> extends EndpointPair<N> {
    private Ordered(N source, N target) {
      super(source, target);
    }

    @Override
    public N source() {

        <exclude>%regex[(?!((?!target/)[^/]+/)*src/).*target.*]</exclude>
        <exclude>**/*.log</exclude>
        <exclude>**/.gitignore</exclude>
        <exclude>**/.gitattributes</exclude>
        <exclude>init-git-svn.sh</exclude>
        <exclude>**/.repository/**</exclude>
        <exclude>**/.classpath</exclude>
        <exclude>**/.project</exclude>
        <exclude>**/.settings/**</exclude>
        <exclude>**/*.iml</exclude>

                crawlingInfoHelper.generateId(dataMap));
    }

    @Test
    public void test_generateId_long() {
        for (int i = 0; i < 1000; i++) {
            final String value = RandomStringUtils.randomAlphabetic(550);
            assertEquals(128, crawlingInfoHelper.generateId(value.substring(0, 440)).length());

   * SetView#maxSize()} of {@code max}.
   */
  private static SetView<Integer> setSizeRange(int min, int max) {
    checkArgument(min >= 0 && max >= min);
    SetView<Integer> set = difference(setSize(max), setSize(max - min));
    checkState(set.minSize() == min && set.maxSize() == max);
    return set;
  }

  /**

      if (AnnotatedElement.class.isAssignableFrom(TypeVariable.class)) {
        if (new TypeCapture<Entry<String, int[][]>>() {}.capture()
            .toString()
            .contains("java.util.Map.java.util.Map")) {
          CURRENT = JAVA8;
        } else {
          CURRENT = JAVA9;
        }
      } else if (new TypeCapture<int[]>() {}.capture() instanceof Class) {
        CURRENT = JAVA7;
      } else {
        CURRENT = JAVA6;

    /**
     * Event severity levels
     */
    public enum Severity {
        INFO(0), WARNING(1), ERROR(2), CRITICAL(3);

        private final int level;

        Severity(int level) {
            this.level = level;
        }

        public int getLevel() {
            return level;
        }
    }

    private static class SingletonHolder {