match regex
'string'.match(/regex/);
console.log('The 1quick5'.match(/[0-9]/g)); // ['1', '5']
/regex/.test('string');
console.log(new RegExp('foo*').test('table football')); //truematch regex
'string'.match(/regex/);
console.log('The 1quick5'.match(/[0-9]/g)); // ['1', '5']
/regex/.test('string');
console.log(new RegExp('foo*').test('table football')); //trueregex match exact string
you want to achieve a case insensitive match for the word "rocket"
surrounded by non-alphanumeric characters. A regex that would work would be:
\W*((?i)rocket(?-i))\W*regex exact match
use ^ and $ to match the start and end of your string
^matchmeexactly$match regex
const regex = /([a-z]*)ball/g;
const str = "basketball football baseball";
let result;
while((result = regex.exec(str)) !== null) {
console.log(result[1]);
// => basket
// => foot
// => base
}Match regex
// regex_match example
#include <iostream>
#include <string>
#include <regex>
int main()
{
if (std::regex_match("subject", std::regex("(sub)(.*)")))
std::cout << "string literal matched\n";
const char cstr[] = "subject";
std::string s("subject");
std::regex e("(sub)(.*)");
if (std::regex_match(s, e))
std::cout << "string object matched\n";
if (std::regex_match(s.begin(), s.end(), e))
std::cout << "range matched\n";
std::cmatch cm; // same as std::match_results<const char*> cm;
std::regex_match(cstr, cm, e);
std::cout << "string literal with " << cm.size() << " matches\n";
std::smatch sm; // same as std::match_results<string::const_iterator> sm;
std::regex_match(s, sm, e);
std::cout << "string object with " << sm.size() << " matches\n";
std::regex_match(s.cbegin(), s.cend(), sm, e);
std::cout << "range with " << sm.size() << " matches\n";
// using explicit flags:
std::regex_match(cstr, cm, e, std::regex_constants::match_default);
std::cout << "the matches were: ";
for (unsigned i = 0; i < cm.size(); ++i) {
std::cout << "[" << cm[i] << "] ";
}
std::cout << std::endl;
}Copyright © 2021 Codeinu
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