}
// Rule #1: Head-to-head wins.
+ let num_relevant_games = 0;
let beat_parts = partition_by_beat(teams, function(beat, teams_to_idx) {
for (let i = 0; i < games.length; ++i) {
let idx1 = teams_to_idx[games[i].name1];
if (idx1 !== undefined && idx2 !== undefined) {
if (games[i].score1 > games[i].score2) {
beat[idx1][idx2] = 1;
- }
- if (games[i].score1 < games[i].score2) {
+ ++num_relevant_games;
+ } else if (games[i].score1 < games[i].score2) {
beat[idx2][idx1] = 1;
+ ++num_relevant_games;
}
}
}
return subrank_partitions(games, nplayed_parts, start_rank, tiebreakers);
}
- // Rule #3: Head-to-head goal difference.
+ // Rule #3: Head-to-head goal difference (if all have played).
let teams_to_idx = make_teams_to_idx(teams);
- for (let i = 0; i < teams.length; i++) {
- teams[i].h2h_gd = 0;
- teams[i].h2h_goals = 0;
- }
- for (let i = 0; i < games.length; ++i) {
- let idx1 = teams_to_idx[games[i].name1];
- let idx2 = teams_to_idx[games[i].name2];
- if (idx1 !== undefined && idx2 !== undefined &&
- !isNaN(games[i].score1) && !isNaN(games[i].score2)) {
- teams[idx1].h2h_gd += games[i].score1;
- teams[idx1].h2h_gd -= games[i].score2;
- teams[idx2].h2h_gd += games[i].score2;
- teams[idx2].h2h_gd -= games[i].score1;
-
- teams[idx1].h2h_goals += games[i].score1;
- teams[idx2].h2h_goals += games[i].score2;
+ if (num_relevant_games >= teams.length * (teams.length - 1) / 2) {
+ for (let i = 0; i < teams.length; i++) {
+ teams[i].h2h_gd = 0;
+ teams[i].h2h_goals = 0;
+ }
+ for (let i = 0; i < games.length; ++i) {
+ let idx1 = teams_to_idx[games[i].name1];
+ let idx2 = teams_to_idx[games[i].name2];
+ if (idx1 !== undefined && idx2 !== undefined &&
+ !isNaN(games[i].score1) && !isNaN(games[i].score2)) {
+ teams[idx1].h2h_gd += games[i].score1;
+ teams[idx1].h2h_gd -= games[i].score2;
+ teams[idx2].h2h_gd += games[i].score2;
+ teams[idx2].h2h_gd -= games[i].score1;
+
+ teams[idx1].h2h_goals += games[i].score1;
+ teams[idx2].h2h_goals += games[i].score2;
+ }
+ }
+ let h2h_gd_parts = partition(teams, function(a, b) { return b.h2h_gd - a.h2h_gd });
+ if (h2h_gd_parts.length > 1) {
+ tiebreakers.push(explain_tiebreaker(h2h_gd_parts, 'head-to-head goal difference'));
+ return subrank_partitions(games, h2h_gd_parts, start_rank, tiebreakers);
}
- }
- let h2h_gd_parts = partition(teams, function(a, b) { return b.h2h_gd - a.h2h_gd });
- if (h2h_gd_parts.length > 1) {
- tiebreakers.push(explain_tiebreaker(h2h_gd_parts, 'head-to-head goal difference'));
- return subrank_partitions(games, h2h_gd_parts, start_rank, tiebreakers);
}
// Rule #4: Goal difference against common opponents.
return subrank_partitions(games, gd_parts, start_rank, tiebreakers);
}
- // Rule #5: Head-to-head scored goals.
- let h2h_goals_parts = partition(teams, function(a, b) { return b.h2h_goals - a.h2h_goals });
- if (h2h_goals_parts.length > 1) {
- tiebreakers.push(explain_tiebreaker(h2h_goals_parts, 'head-to-head scored goals'));
- return subrank_partitions(games, h2h_goals_parts, start_rank, tiebreakers);
+ // Rule #5: Head-to-head scored goals (if all have played).
+ if (num_relevant_games >= teams.length * (teams.length - 1) / 2) {
+ let h2h_goals_parts = partition(teams, function(a, b) { return b.h2h_goals - a.h2h_goals });
+ if (h2h_goals_parts.length > 1) {
+ tiebreakers.push(explain_tiebreaker(h2h_goals_parts, 'head-to-head scored goals'));
+ return subrank_partitions(games, h2h_goals_parts, start_rank, tiebreakers);
+ }
}
// Rule #6: Goals scored against common opponents.