hashmap3: Use or_default

Author: mo8it

rustlings-macros/info.toml

@@ -575,12 +575,8 @@ https://doc.rust-lang.org/book/ch08-03-hash-maps.html#only-inserting-a-value-if-
 name = "hashmaps3"
 dir = "11_hashmaps"
 hint = """
-Hint 1: Use the `entry()` and `or_insert()` (or `or_insert_with()`) methods of
-        `HashMap` to insert the default value of `TeamScores` if a team doesn't
-        exist in the table yet.
-
-Learn more in The Book:
-https://doc.rust-lang.org/book/ch08-03-hash-maps.html#only-inserting-a-value-if-the-key-has-no-value
+Hint 1: Use the `entry()` and `or_default()` methods of `HashMap` to insert the
+        default value of `TeamScores` if a team doesn't exist in the table yet.
 
 Hint 2: If there is already an entry for a given key, the value returned by
         `entry()` can be updated based on the existing value.

solutions/11_hashmaps/hashmaps3.rs

@@ -28,17 +28,13 @@ fn build_scores_table(results: &str) -> HashMap<&str, TeamScores> {
         let team_2_score: u8 = split_iterator.next().unwrap().parse().unwrap();
 
         // Insert the default with zeros if a team doesn't exist yet.
-        let team_1 = scores
-            .entry(team_1_name)
-            .or_insert_with(TeamScores::default);
+        let team_1 = scores.entry(team_1_name).or_default();
         // Update the values.
         team_1.goals_scored += team_1_score;
         team_1.goals_conceded += team_2_score;
 
         // Similarly for the second team.
-        let team_2 = scores
-            .entry(team_2_name)
-            .or_insert_with(TeamScores::default);
+        let team_2 = scores.entry(team_2_name).or_default();
         team_2.goals_scored += team_2_score;
         team_2.goals_conceded += team_1_score;
     }