Some code for generating a round robin tourney.

generate_roundrobin.rs

fn generate_roundrobin(teams: &Vec<IdAndName>) -> Vec<Vec<(&IdAndName, &IdAndName)>> {
    let static_team: &IdAndName = &teams[0];
    let mut other_teams: Vec<&IdAndName> = teams.iter().skip(1).collect();

    let mut result: Vec<Vec<(&IdAndName, &IdAndName)>> = Vec::new();

    for _ in range(0u, teams.len() - 1) {
        let mut session: Vec<(&IdAndName, &IdAndName)> = Vec::new();
        session.push((other_teams[0], static_team));
        for i in range(0u, (other_teams.len() - 1) / 2) {
            let team_1: &IdAndName = other_teams[i+1];
            let team_2: &IdAndName = other_teams[other_teams.len() - 1 - i];
            session.push((team_1, team_2));
        }

        // Rotate other_teams
        let temp = other_teams[0];
        for i in range(0u, other_teams.len() - 1) {
            other_teams[i] = other_teams[i + 1];
        }
        other_teams[other_teams.len() - 1] = temp;

        result.push(session)
    }

    result
}