"contains""contains""has"Database+ name: string+ collections: Collection[]Collection+ name: string+ documents: Document[]Document+ fields: Field[]Field+ key: string+ value: any 5. 结语 通过这篇文章,我希望能够帮助刚入行的小白们更好地理解如何在MongoDB数据库中修改表数据。MongoDB是一种强大的非...
private void getThreatSubTypeFilter(List<String> threatSubType, Query query) { // 如果threatSubType不为null或者列表不为空,将“all”添加为列表,代表需要值为查询“全部”的文档 if (threatSubType != null && threatSubType.size() != 0) { if (!threatSubType.contains(ALL)) { threatSubType.add(ALL...
String lastname);// 多字段or查询List<Person>findByEmailAddressOrPhone(EmailAddress emailAddress, String phone);// 根据username模糊查询List<UserInfo>findByUsernameLike(String username);// 根据lastname或者firstname查询,people属性去重List<Person>find...
*@return*/publicstaticString escapeExprSpecialWord(String keyword) { String[] fbsArr= { "\\", "$", "(", ")", "*", "+", ".", "[", "]", "?", "^", "{", "}", "|"};for(String key : fbsArr) {if(keyword.contains(key)) { keyword= keyword.replace(key, "\\" +key...
cname db.getCollectionInfos([filter]) - returns a list that contains the names and options of the db's collections db.getCollectionNames() db.getLastError() - just returns the err msg string db.getLastErrorObj() - return full status object db.getLogComponents() db.getMongo() get the ...
This database contains 23,485,919 documents. Check the MongoDB connection. isopen(conn) ans = logical 1 The database connection is successful because theisopenfunction returns1. Otherwise, the database connection is closed. Determine the number of documents in theemployeecollection. The collection ...
public boolean contains(E e): 判断当前集合中是否包含给定的对象。...public Object[] toArray(): 把集合中的元素,存储到数组中。...java.util.Collection; public class Demo1Collection { public static void main(String[] args) { // 创建集合对象 72340 java中的Set集合 hash表容量:hash表中桶的数量...
static bool peg() { 11. const auto& dsmd = serverGlobalParams.disabledSecureAllocatorDomains; 12. const auto contains = [&](StringData dt) { 13. return std::find(dsmd.begin(), dsmd.end(), dt) != dsmd.end(); 14. }; 15. 16. //注意这里,如果disabledSecureAllocatorDomains配置为*...
const auto contains = [&](StringData dt) { return std::find(dsmd.begin(), dsmd.end(), dt) != dsmd.end(); }; //注意这里,如果disabledSecureAllocatorDomains配置为*,直接false static const bool ret = !(contains("*"_sd) || contains(NameTrait::DomainType)); ...
To dump data to a binary archive file, use themongodump--archiveoption.mongodumpcreates a binary file that contains the archived data. Syntax mongodumpsyntax: mongodump <options> <connection-string> To connect to a local MongoDB instance running on port 27017 and use the default settings to ...