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Merge pull request #15 from hoangph271/exercises/hashmaps

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[Add] exercises/hashmaps
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Snêu 2023-01-05 00:13:17 +07:00 committed by GitHub
commit d5f21f29c2
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3 changed files with 24 additions and 18 deletions
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11
exercises/hashmaps/hashmaps1.rs
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@ -10,17 +10,16 @@
// //
// Execute `rustlings hint hashmaps1` or use the `hint` watch subcommand for a hint. // Execute `rustlings hint hashmaps1` or use the `hint` watch subcommand for a hint.
// I AM NOT DONE
use std::collections::HashMap; use std::collections::HashMap;
fn fruit_basket() -> HashMap<String, u32> { fn fruit_basket() -> HashMap<String, u32> {
let mut basket = // TODO: declare your hash map here. let mut basket = HashMap::new();
// Two bananas are already given for you :)
basket.insert(String::from("banana"), 2); basket.insert(String::from("banana"), 2);
basket.insert(String::from("pear"), 1);
// TODO: Put more fruits in your basket here. basket.insert(String::from("BTC"), 1);
basket.insert(String::from("ETH"), 1);
basket.insert(String::from("FIL"), 1);
basket basket
} }

8
exercises/hashmaps/hashmaps2.rs
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@ -11,8 +11,6 @@
// //
// Execute `rustlings hint hashmaps2` or use the `hint` watch subcommand for a hint. // Execute `rustlings hint hashmaps2` or use the `hint` watch subcommand for a hint.
// I AM NOT DONE
use std::collections::HashMap; use std::collections::HashMap;
#[derive(Hash, PartialEq, Eq)] #[derive(Hash, PartialEq, Eq)]
@ -34,9 +32,9 @@ fn fruit_basket(basket: &mut HashMap<Fruit, u32>) {
]; ];
for fruit in fruit_kinds { for fruit in fruit_kinds {
// TODO: Put new fruits if not already present. Note that you if basket.get_mut(&fruit).is_none() {
// are not allowed to put any type of fruit that's already basket.insert(fruit, 1);
// present! }
} }
} }

23
exercises/hashmaps/hashmaps3.rs
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@ -14,8 +14,6 @@
// Execute `rustlings hint hashmaps3` or use the `hint` watch subcommand for a hint. // Execute `rustlings hint hashmaps3` or use the `hint` watch subcommand for a hint.
// I AM NOT DONE
use std::collections::HashMap; use std::collections::HashMap;
// A structure to store team name and its goal details. // A structure to store team name and its goal details.
@ -35,11 +33,22 @@ fn build_scores_table(results: String) -> HashMap<String, Team> {
let team_1_score: u8 = v[2].parse().unwrap(); let team_1_score: u8 = v[2].parse().unwrap();
let team_2_name = v[1].to_string(); let team_2_name = v[1].to_string();
let team_2_score: u8 = v[3].parse().unwrap(); 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 let team_1_entry = scores.entry(team_1_name.clone()).or_insert(Team {
// will be the number of goals conceded from team_2, and similarly name: team_1_name,
// goals scored by team_2 will be the number of goals conceded by goals_scored: 0,
// team_1. goals_conceded: 0,
});
team_1_entry.goals_scored += team_1_score;
team_1_entry.goals_conceded += team_2_score;
let team_2_entry = scores.entry(team_2_name.clone()).or_insert(Team {
name: team_2_name,
goals_scored: 0,
goals_conceded: 0,
});
team_2_entry.goals_scored += team_2_score;
team_2_entry.goals_conceded += team_1_score;
} }
scores scores
} }