C++中两个有用的例程：容器字符串化与字符串分词

• 容器中元素字符串化

template <typename C, typename T> std::string toString(const C& container, const T& delim)
{
    std::stringstream result;
    for (auto it = container.begin(); it != container.end(); ++it) {
        result << *it;
        if (std::distance(it, container.end()) != 1)
            result << delim;
    }
    return result.str();
}

• 字符串分词Tokenize

std::vector<std::string> tokenize(const std::string& str, const std::string& delimeter)
{
    std::vector<std::string> result;
    size_t start = str.find_first_not_of(delimeter);
    size_t end = start;

    while (start != std::string::npos) {
        // Find next occurence of delimiter
        end = str.find(delimeter, start);
        // Push back the token found into vector
        result.push_back(str.substr(start, end - start));
        // Skip all occurences of the delimiter to find new start
        start = str.find_first_not_of(delimeter, end);
    }
    return result;
}