Using own search predicate in C++ find_if() for finding attributes in collections of data structures

If you want to find a complex data structure in a collection but looking only for a single attribute, e.g. the ID of a monster in a collection of monsters.

You need to write your own search predicate:

struct find_monster
{
    DWORD id;
    find_monster(DWORD id) : id(id) {}
    bool operator () ( const monster& m ) const
    {
        return m.id == id;
    }
};

it = std::find_if( monsters.begin(), monsters.end(), find_monster(monsterID));

Thanks to: http://stackoverflow.com/a/590005

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