Your regular expression does not match the subject string. Quick Reference Search reference All Tokens Common Tokens General Tokens Anchors Meta Sequences Quantifiers Group Constructs Character Classes Flags/
if (std::regex_match(text, pattern)) { std::cout << "The string matches the pattern." << std::endl; } else { std::cout << "The string does not match the pattern." << std::endl; } return 0; }输出结果: The string matches the pattern.2. 在字符串中搜索匹配项实例...
}else{std::cout<<"The string does not match the pattern."<<std::endl; }return0; } 输出结果: Thestringmatchesthe pattern. 2. 在字符串中搜索匹配项 实例 #include<iostream>#include<string>#include<regex>intmain(){std::stringtext ="123-456-7890 and 987-654-3210";std::regexpattern("\d...
A character not in the range: a-z [^a-z] A character in the range: a-z or A-Z [a-zA-Z] Any single character . Alternate - match either a or b a|b Any whitespace character \s Any non-whitespace character \S Any digit
CREATE DATABASE csharptest GO USE csharptest GO CREATE TABLE testdata ( [id] INT, [text] VARCHAR(100), ) GO INSERT INTO testdata(id, "text") VALUES (4, 'This sentence contains C#') INSERT INTO testdata(id, "text") VALUES (1, 'This sentence does not') INSERT INTO ...
public static void main(String[] args) { /*普通代码块: *直接定义在在方法或语句中出现”...
#include<iostream>#include<regex>intmain(){std::stringstr ="Hello, World!";std::regexpattern("Hello,.*");if(std::regex_match(str, pattern)) {std::cout<<"String matches the pattern."<<std::endl; }else{std::cout<<"String does not match the pattern."<<std::endl; }return0; } ...
regex_match是正则表达式匹配的函数，下面以例子说明。如果想系统的了解，参 考regex_match [cpp] view plain copy 1. // regex_match example 2. #include <iostream> 3. #include <string> 4. #include <regex> 5.6. int main ()7. { 8.9. if (std::regex_match ("subject", std::regex("...
db.inventory.find( {item: {$not: {$regex:/^p.*/} } } ) 索引使用 根据$regex查询是否区分大小写,该查询的索引使用和性能会有所不同。 区分大小写的查询 对于区分大小写的正则表达式查询,如果该字段存在索引,则 MongoDB 将正则表达式与索引中的值进行匹配,这可能比收集扫描更快。
#include<iostream>#include<regex>#include<string>intmain(void){if(std::regex_match("subject",std::regex("(sub).(.*)"))){std::cout<<"string literal matched\n";}std::strings("subject");std::regexe("(sub)(.*)");if(std::regex_match(s,e)){std::cout<<"string literal matched\...