solve hashmap

Author: wishlee1124

exercises/hashmaps/hashmaps1.rs

@@ -11,17 +11,18 @@
 // Execute `rustlings hint hashmaps1` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 use std::collections::HashMap;
 
 fn fruit_basket() -> HashMap<String, u32> {
-    let mut basket = // TODO: declare your hash map here.
+    let mut basket = HashMap::new();// TODO: declare your hash map here.
 
     // Two bananas are already given for you :)
     basket.insert(String::from("banana"), 2);
 
     // TODO: Put more fruits in your basket here.
+    basket.insert(String::from("apple"), 3);
+
+    basket.insert(String::from("mango"), 4);
 
     basket
 }

exercises/hashmaps/hashmaps2.rs

@@ -14,7 +14,6 @@
 // Execute `rustlings hint hashmaps2` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
 
 use std::collections::HashMap;
 
@@ -40,6 +39,7 @@ fn fruit_basket(basket: &mut HashMap<Fruit, u32>) {
         // TODO: Insert new fruits if they are not already present in the
         // basket. Note that you are not allowed to put any type of fruit that's
         // already present!
+        basket.entry(fruit).or_insert(5);
     }
 }
 

exercises/hashmaps/hashmaps3.rs

@@ -14,7 +14,6 @@
 // Execute `rustlings hint hashmaps3` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
 
 use std::collections::HashMap;
 
@@ -34,11 +33,28 @@ fn build_scores_table(results: String) -> HashMap<String, Team> {
         let team_1_score: u8 = v[2].parse().unwrap();
         let team_2_name = v[1].to_string();
         let team_2_score: u8 = v[3].parse().unwrap();
+
         // TODO: Populate the scores table with details extracted from the
         // current line. Keep in mind that goals scored by team_1
         // will be the number of goals conceded from team_2, and similarly
         // goals scored by team_2 will be the number of goals conceded by
         // team_1.
+        let team_1_count = scores.entry(team_1_name)
+                                            .or_insert(Team{
+                                                                    goals_scored: 0,
+                                                                    goals_conceded: 0
+                                                                }
+        );
+        team_1_count.goals_scored += team_1_score;
+        team_1_count.goals_conceded += team_2_score;
+        let team_2_count = scores.entry(team_2_name)
+        .or_insert(Team{
+                                goals_scored: 0,
+                                goals_conceded: 0
+                            }
+        );
+        team_2_count.goals_scored += team_2_score;
+        team_2_count.goals_conceded += team_1_score;
     }
     scores
 }