字符串分隔

将一个字符串string 通过分隔符存入到一个vector中。

vector<string> split(const string &s, const char *delim) {
    vector<string> ret;
    size_t last = 0;
    auto index = s.find(delim, last);
    while (index != string::npos) {
        if (index - last > 0) {
            ret.push_back(s.substr(last, index - last));
        }
        last = index + strlen(delim);
        index = s.find(delim, last);
    }
    if (!s.size() || s.size() - last > 0) {
        ret.push_back(s.substr(last));
    }
    return ret;
}