template<class obj_type>
obj_type
hashmap<obj_type>::get_set_elem(obj_type t_obj, string s_key)
{
  typename hashmap<obj_type>::iterator iter = this->find(s_key);

  if ( iter == this->end() )
  {
    set_elem(t_obj, s_key);
    return obj_type();
  }

  obj_type t_ret = iter->second;
  iter->second = t_obj;

  return t_ret;
}

template<class obj_type>
void
hashmap<obj_type>::set_elem(obj_type t_obj, string s_key)
{
  (*this)[s_key] = t_obj;
}

template<class obj_type>
obj_type
hashmap<obj_type>::get_elem(string s_key)
{
  typename hashmap<obj_type>::iterator iter = this->find(s_key);

  if ( iter != this->end() )
    return iter->second;

  return obj_type();
}

template<class obj_type>
vector<string>*
hashmap<obj_type>::get_key_vector()
{
  vector<string>* p_vec = new vector<string>;
  typename hashmap<obj_type>::iterator iter;

  for ( iter = this->begin(); iter != this->end(); ++iter )
    p_vec->push_back(iter->first);

  return p_vec;
}

template<class obj_type>
bool
hashmap<obj_type>::exists(string s_key)
{
  return this->find(s_key) != this->end();
}

template<class obj_type>
void
hashmap<obj_type>::run_func( void (*func)(obj_type) )
{
  typename hashmap<obj_type>::iterator iter;
  for ( iter = this->begin(); iter != this->end(); ++iter )
    ( *func ) ( iter->second );
}

template<class obj_type>
void
hashmap<obj_type>::run_func( void (*func)(obj_type, void*), void* v_arg )
{
  typename hashmap<obj_type>::iterator iter;
  for ( iter = this->begin(); iter != this->end(); ++iter )
    ( *func ) ( iter->second, v_arg );
}