improve

exercises/11_hashmaps/hashmaps3.rs

@@ -40,27 +40,29 @@ fn build_scores_table(results: String) -> HashMap<String, Team> {
         // will be the number of goals conceded by team_2, and similarly
         // goals scored by team_2 will be the number of goals conceded by
         // team_1.
-        for team in vec![&team_1_name, &team_2_name] {
-            if !scores.contains_key(team) {
-                let t = Team {
-                    goals_scored: 0,
-                    goals_conceded: 0,
-                };
+        if let Some(t) = scores.get_mut(&team_1_name) {
+            t.goals_scored += team_1_score;
+            t.goals_conceded += team_2_score;
+        } else {
+            let t = Team {
+                goals_scored: team_1_score,
+                goals_conceded: team_2_score,
+            };
     
-                scores.insert(team.to_string(), t);
-            }
+            scores.insert(team_1_name.to_string(), t);
         }
 
-        println!("{}", &team_1_name);
-        println!("{}", &team_2_name);
+        if let Some(t) = scores.get_mut(&team_2_name) {
+            t.goals_scored += team_2_score;
+            t.goals_conceded += team_1_score;
+        } else {
+            let t = Team {
+                goals_scored: team_2_score,
+                goals_conceded: team_1_score,
+            };
     
-        let mut t = scores.get_mut(&team_1_name).unwrap();
-        t.goals_scored += team_1_score;
-        t.goals_conceded += team_2_score;
-
-        let mut t = scores.get_mut(&team_2_name).unwrap();
-        t.goals_scored += team_2_score;
-        t.goals_conceded += team_1_score;
+            scores.insert(team_2_name.to_string(), t);
+        }
     }
     scores
 }