diff --git a/exercises/hashmaps/hashmaps1.rs b/exercises/hashmaps/hashmaps1.rs index fd8dd2f8..36ce6a0c 100644 --- a/exercises/hashmaps/hashmaps1.rs +++ b/exercises/hashmaps/hashmaps1.rs @@ -10,18 +10,17 @@ // // 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 { - let mut basket = // TODO: declare your hash map here. + let mut basket: HashMap = 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"), 2); + basket.insert(String::from("mango"), 2); basket } diff --git a/exercises/hashmaps/hashmaps2.rs b/exercises/hashmaps/hashmaps2.rs index 454b3e1d..dd838d11 100644 --- a/exercises/hashmaps/hashmaps2.rs +++ b/exercises/hashmaps/hashmaps2.rs @@ -11,8 +11,6 @@ // // Execute `rustlings hint hashmaps2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - use std::collections::HashMap; #[derive(Hash, PartialEq, Eq)] @@ -37,6 +35,9 @@ fn fruit_basket(basket: &mut HashMap) { // TODO: Put new fruits if not already present. Note that you // are not allowed to put any type of fruit that's already // present! + if !basket.contains_key(&fruit) { + basket.insert(fruit, 2); + } } } diff --git a/exercises/hashmaps/hashmaps3.rs b/exercises/hashmaps/hashmaps3.rs index ad3baa68..fe8ac594 100644 --- a/exercises/hashmaps/hashmaps3.rs +++ b/exercises/hashmaps/hashmaps3.rs @@ -40,6 +40,29 @@ fn build_scores_table(results: String) -> HashMap { // 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. + + scores + .entry(team_1_name.clone()) + .and_modify(|team| { + team.goals_scored += team_1_score; + team.goals_conceded += team_2_score; + }) + .or_insert(Team { + name: team_1_name, + goals_scored: team_1_score, + goals_conceded: team_2_score, + }); + scores + .entry(team_2_name.clone()) + .and_modify(|team| { + team.goals_scored += team_2_score; + team.goals_conceded += team_1_score; + }) + .or_insert(Team { + name: team_2_name, + goals_scored: team_2_score, + goals_conceded: team_1_score, + }); } scores }