simple in-place trim functions, copied from somewhere

trim.cpp

// trim from start (in place)
void ltrim(std::string &s) {
	s.erase(s.begin(), std::find_if(s.begin(), s.end(),
									[](int ch) { return !std::isspace(ch); }));
}

// trim from end (in place)
void rtrim(std::string &s) {
	s.erase(std::find_if(s.rbegin(), s.rend(),
						 [](int ch) { return !std::isspace(ch); })
				.base(),
			s.end());
}

// trim from both ends (in place)
void trim(std::string &s) {
	ltrim(s);
	rtrim(s);
}