boost::split string split algo

Today just check how a url is parsed into several components.

 std::vector< std::string > tokens;
 boost::split( tokens, URL, boost::is_any_of( ":/" ));

It is very simple and straightforward way to implement the functions.

much better than istringstream.getline used before.

        char tmp[128];
        istringstream stream(str.c_str());
        stream.getline(tmp, MAX_ATTRIBUTE_LEN, delimiter);

Also check the boost website
http://www.boost.org/doc/libs/1_49_0/doc/html/string_algo/usage.html

such like case conversion and trim are there.

string str1("HeLlO WoRld!");
    to_upper(str1); // str1=="HELLO WORLD!"

    string str1="     hello world!     ";
    string str2=trim_left_copy(str1);   // str2 == "hello world!     "
    string str3=trim_right_copy(str1);  // str3 == "     hello world!"
    trim(str1);  // str1 == "hello world!" 

It is cool. Don't know the performance now but let it there 

unless it is the bottleneck of the whole application. I believe it won't be recently.