Re: [Boost-users] [multi-index] retrieve unique keys of a non-unique index

El 01/08/2013 22:47, Rory McCarthy escribió: Hi everyone (my apologies if this shows as a report), In the following example is there a more efficient way to retrieve the unique keys of a non-unique index? [...] boost::multi_index::index::type::iterator ic0 = get<name>(taggedNodes).begin(); boost::multi_index::index::type::iterator ic1 = get<name>(taggedNodes).end(); while (ic0 != ic1) { std::cout << ic0->name << std::endl; ic0 = get<name>(taggedNodes).equal_range(ic0->name).second; } In big-O terms, this is as good as you can get with hashed indices. A slightly more efficient approach (saving some unnecessary lookup) would be: void dump_entry_name(const TaggedNodeEntry& x) { std::cout<http://www.tid.es/ES/PAGINAS/disclaimer.aspx