http://www.boost.org/doc/libs/1_35_0/doc/html/boost/intrusive/hashtable.html
http://www.boost.org/doc/libs/1_41_0/doc/html/unordered.html
http://www.boost.org/doc/libs/1_41_0/boost/multi_index_container.hpp
Which of the above version are best for supporting integer keys and values
which ar std::vectors and are there any examples showing how to use the
container?