iOS5 snippet for calling a welcome screen segue when a UITableView has 0 items in it

gistfile1.m

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    if(_objects.count == 0) {
        [self performSegueWithIdentifier: @"welcomeSegue" sender: self];
    }
    return _objects.count;
}