public void testIndexOf_duplicate() {
    E[] array = createSamplesArray();
    array[getNumElements() / 2] = e0();
    collection = getSubjectGenerator().create(array);
    assertEquals(
        "indexOf(duplicate) should return index of first occurrence", 0, getList().indexOf(e0()));
  }

  public void testLastIndexOf_duplicate() {
    E[] array = createSamplesArray();
    array[getNumElements() / 2] = e0();
    collection = getSubjectGenerator().create(array);
    assertEquals(
        "lastIndexOf(duplicate) should return index of last occurrence",
        getNumElements() / 2,
        getList().lastIndexOf(e0()));
  }

import org.apache.maven.model.v4.MavenStaxReader;

/**
 * A utility class that analyzes Maven POM files to identify memory usage patterns and potential memory optimizations.
 * This analyzer focuses on identifying duplicate strings and their memory impact across different paths in the POM structure.
 *
 * <p>The analyzer processes POM files recursively, tracking string occurrences and their locations within the POM structure.

      K key = checkNotNull(entry.getKey());
      V previous = delegate.put(key, checkNotNull(entry.getValue()));
      if (throwIfDuplicateKeys && previous != null) {
        throw new IllegalArgumentException("duplicate key: " + key);
      }
    }
    this.delegate = Collections.unmodifiableMap(delegate);
  }

  @Override
  boolean isPartialView() {
    return false;
  }

  @Override

        return (depMngt != null) ? Collections.unmodifiableList(depMngt.getDependencies()) : Collections.emptyList();
    }

    // TODO: this is duplicate of PomArtifactHandlerProvider provided one
    static class PomArtifactHandler implements ArtifactHandler {
        @Override
        public String getClassifier() {
            return null;
        }

        Objects.requireNonNull(projectRealm, "projectRealm cannot be null");

        if (cache.containsKey(key)) {
            throw new IllegalStateException("Duplicate project realm for extensions " + key);
        }

        CacheRecord record = new CacheRecord(projectRealm, extensionArtifactFilter);

        cache.put(key, record);

        return record;
    }

Прежде чем установить для `convert_underscores` значение `False`, имейте в виду, что некоторые HTTP-прокси и серверы запрещают использование заголовков с подчеркиванием.

///

## Повторяющиеся заголовки { #duplicate-headers }

Есть возможность получать несколько заголовков с одним и тем же именем, но разными значениями.

Вы можете определить эти случаи, используя список в объявлении типа.

}

var (
	errInvalidTagKey   = Errorf("The TagKey you have provided is invalid")
	errInvalidTagValue = Errorf("The TagValue you have provided is invalid")

	errDuplicatedXMLTag = Errorf("duplicated XML Tag")
	errUnknownXMLTag    = Errorf("unknown XML Tag")
)

// UnmarshalXML - decodes XML data.
func (tag *Tag) UnmarshalXML(d *xml.Decoder, start xml.StartElement) (err error) {

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class SetMultimapPutTester<K, V> extends AbstractMultimapTester<K, V, SetMultimap<K, V>> {
  // Tests for non-duplicate values are in MultimapPutTester

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testPutDuplicateValuePreservesSize() {
    assertFalse(multimap().put(k0(), v0()));

  SUPPORTS_REMOVE,
  FAILS_FAST_ON_CONCURRENT_MODIFICATION,
  /**
   * Indicates that the constructor or factory method of a map, usually an immutable map, throws an
   * {@link IllegalArgumentException} when presented with duplicate keys instead of discarding all
   * but one.
   */
  REJECTS_DUPLICATES_AT_CREATION,

  GENERAL_PURPOSE(SUPPORTS_PUT, SUPPORTS_REMOVE);

  private final Set<Feature<? super Map>> implied;