import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.util.regex.Pattern;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.fess.es.log.bsbhv.BsClickLogBhv;
import org.codelibs.fess.util.ComponentUtil;

import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.xml.xpath.XPathEvaluationResult;
import javax.xml.xpath.XPathException;
import javax.xml.xpath.XPathNodes;

import org.codelibs.core.beans.util.BeanUtil;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Pattern;
import junit.framework.AssertionFailedError;
import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Unit test for {@link Predicates}.
 *

# See the License for the specific language governing permissions and
# limitations under the License.

# retry.sh retries a command until it succeeds. It accepts a regex pattern to match failures on to
# determine if a retry should be attempted.
# Example: retry.sh "connection timed out" ./my-flaky-script.sh some args

	flag.DurationVar(&goTime, "time", 0, "goroutine waiting for exactly the specified time")
	flag.DurationVar(&margin, "margin", 0, "margin time")
	flag.StringVar(&searchText, "search", "", "Regex to search for a text in one goroutine stacktrace")
}

func parseGoroutineType2(path string) (map[time.Duration][]string, error) {
	f, err := os.Open(path)
	if err != nil {
		return nil, err
	}

package org.codelibs.fess.crawler.helper;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Queue;
import java.util.regex.Pattern;

import org.codelibs.fess.crawler.entity.AccessResultImpl;
import org.codelibs.fess.crawler.entity.UrlQueueImpl;

/**
 * @author shinsuke
 *
 */
public class MemoryDataHelper {

But whenever you need them and go and learn them, know that you can already use them directly in **FastAPI**.

### Pydantic v1 `regex` instead of `pattern`

Before Pydantic version 2 and before FastAPI 0.100.0, the parameter was called `regex` instead of `pattern`, but it's now deprecated.

You could still see some code using it:

//// tab | Python 3.10+ Pydantic v1

```Python hl_lines="11"

import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.HashSet;
import java.util.Locale;
import java.util.Set;
import java.util.regex.Pattern;

import org.apache.maven.artifact.repository.metadata.Metadata;
import org.eclipse.aether.artifact.DefaultArtifact;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;

            doColumn("createdTime");
        }

        public void columnProcessType() {
            doColumn("processType");
        }

        public void columnRegex() {
            doColumn("regex");
        }

        public void columnReplacement() {
            doColumn("replacement");
        }

        public void columnSortOrder() {
            doColumn("sortOrder");
        }

 */
package org.codelibs.fess.helper;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.function.BiFunction;
import java.util.regex.Matcher;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.fess.Constants;