strip whitespace

void stripWhitespace(string& line) {
    string::size_type begin, end;
    line.erase(remove(line.begin(), line.end(), '\t'), line.end());
    begin = line.find_first_not_of(' ');
    end = line.find_last_not_of(' ');
    if (begin != string::npos && end != string::npos)
        line = line.substr(begin, end - begin +1);
}