Boost - unordered_set tutorial/examples/ANYTHING?

Question

I'd like to use unordered_set in a project.

However, documentation for it is either incomplete or just a technical reference, no examples.

Can anyone provide links to online resources which deal with it? Books also welcome, preferably free. Google searching returned nothing of value.

Thanks!

Answer 1

Code for the most common use case:

#include <boost/unordered_set.hpp>
using boost::unordered_set;
using std::string;
using std::cout;
using std::endl;

int main (void)
{   
    // Initialize set
    unordered_set<string> s;
    s.insert("red");
    s.insert("green");
    s.insert("blue");

    // Search for membership
    if(s.find("red") != s.end())
        cout << "found red" << endl;
    if(s.find("purple") != s.end())
        cout << "found purple" << endl;
    if(s.find("blue") != s.end())
        cout << "found blue" << endl;

    return 0;
}

Output

found red
found blue

More Information

http://www.cplusplus.com/reference/unordered_set/unordered_set/find/