#include bool Modelec::startWith(const std::string& str, const std::string& start) { return str.rfind(start, 0) == 0; } bool Modelec::endsWith(const std::string& str, const std::string& end) { if (str.length() >= end.length()) { return (0 == str.compare(str.length() - end.length(), end.length(), end)); } return false; } bool Modelec::contains(const std::string& str, const std::string& sub) { return str.find(sub) != std::string::npos; } std::vector Modelec::split(const std::string& str, const std::string& delimiter) { std::vector tokens; size_t prev = 0, pos = 0; do { pos = str.find(delimiter, prev); if (pos == std::string::npos) pos = str.length(); std::string token = str.substr(prev, pos - prev); if (!token.empty()) tokens.push_back(token); prev = pos + delimiter.length(); } while (pos < str.length() && prev < str.length()); return tokens; }