/** HTTP header name for robots tag */
    private static final String X_ROBOTS_TAG = "X-Robots-Tag";

    /** XPath expression for extracting thumbnail content from meta tags */
    private static final String META_NAME_THUMBNAIL_CONTENT = "//META[@name=\"thumbnail\" or @name=\"THUMBNAIL\"]/@content";

    /** XPath expression for extracting Open Graph image content from meta tags */

 * <li>User agent settings</li>
 * <li>URL pattern matching with regular expressions and contains filters</li>
 * </ul>
 *
 */
public class GsaConfigParser extends DefaultHandler {

    /** Logger instance for this class. */
    private static final Logger logger = LogManager.getLogger(GsaConfigParser.class);

    /** Prefix for regular expression patterns. */
    public static final String REGEXP = "regexp:";

     / __/__  ___ _____/ /__
    _\ \/ _ \/ _ `/ __/  '_/
   /___/ .__/\_,_/_/ /_/\_\   version 2.1.0.2.6.0.0-598
      /_/

Using Scala version 2.11.8 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_112)
Type in expressions to have them evaluated.
Type :help for more information.

scala>
```

- At the _scala>_ prompt, submit the job by typing the following commands, Replace node names, file name, and file location with your values:

        }
        return StringUtil.EMPTY;
    }

    /**
     * Replaces all occurrences of a regular expression pattern in the input string.
     *
     * @param input the input object to process
     * @param regex the regular expression pattern to match
     * @param replacement the replacement string
     * @return string with all matches replaced, or empty string if input is null
     */

## 검증 더 추가하기 { #add-more-validations }

`min_length` 매개변수도 추가할 수 있습니다:

{* ../../docs_src/query_params_str_validations/tutorial003_an_py310.py hl[10] *}

## 정규식 추가 { #add-regular-expressions }

매개변수와 일치해야 하는 <dfn title="정규 표현식(regex 또는 regexp)은 문자열에 대한 검색 패턴을 정의하는 문자 시퀀스입니다.">정규 표현식</dfn> `pattern`을 정의할 수 있습니다:

{* ../../docs_src/query_params_str_validations/tutorial004_an_py310.py hl[11] *}

	if !selectAST.Expression.All &&
		len(selectAST.Expression.Expressions) == 1 &&
		len(selectAST.Expression.Expressions[0].Expression.And) == 1 &&
		len(selectAST.Expression.Expressions[0].Expression.And[0].Condition) == 1 &&
		selectAST.Expression.Expressions[0].Expression.And[0].Condition[0].Operand != nil &&
		selectAST.Expression.Expressions[0].Expression.And[0].Condition[0].Operand.Operand.Left != nil &&

   * in preference if at least one of the parameters is known to contain only ASCII characters.
   *
   * <p>Note however that this method does not always behave identically to expressions such as:
   *
   * <ul>
   *   <li>{@code string.toUpperCase().equals("UPPER CASE ASCII")}
   *   <li>{@code string.toLowerCase().equals("lower case ascii")}
   * </ul>
   *

          </description>
        </field>
        <field>
          <name>expression</name>
          <version>2.0.0+</version>
          <type>String</type>
          <description>Parameter expression, to let user override default value with a user property, system property or project property.</description>
        </field>
        <field>

	)

	// optimize match english letters and midline
	// The following code is basically called in for.
	// In order to avoid the performance problems caused by repeated compilation of regular expressions,
	// it only needs to be done once outside, so optimization is done here.
	if idx != -1 && regEnLetterAndMidline.MatchString(str[0:idx]) {
		name = str[0:idx]
	} else {

   *     string} has a length of zero or cannot be parsed as a {@code float} value
   * @throws NullPointerException if {@code string} is {@code null}
   * @since 14.0
   */
  @GwtIncompatible // regular expressions
  public static @Nullable Float tryParse(String string) {
    if (Doubles.FLOATING_POINT_PATTERN.matcher(string).matches()) {
      // TODO(lowasser): could be potentially optimized, but only with
      // extensive testing