jarjar/rustlings
1
0
Fork 0
mirror of https://github.com/rust-lang/rustlings.git synced 2026-01-12 21:59:18 +00:00
Code Issues Packages Projects Releases Wiki Activity

[Add] exercises/hashmaps

Browse Source
This commit is contained in:
Phan Huy Hoang 2023-01-05 00:12:39 +07:00
parent b67bc4c5b1
commit c89701a04a
3 changed files with 24 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
exercises/hashmaps/hashmaps1.rs
View File

@ -10,17 +10,16 @@
//
// 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();
// 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("pear"), 1);
basket.insert(String::from("BTC"), 1);
basket.insert(String::from("ETH"), 1);
basket.insert(String::from("FIL"), 1);
basket
}

8
exercises/hashmaps/hashmaps2.rs
View File

@ -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)]
@ -34,9 +32,9 @@ fn fruit_basket(basket: &mut HashMap<Fruit, u32>) {
];
for fruit in fruit_kinds {
// 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.get_mut(&fruit).is_none() {
basket.insert(fruit, 1);
}
}
}

23
exercises/hashmaps/hashmaps3.rs
View File

@ -14,8 +14,6 @@
// Execute `rustlings hint hashmaps3` or use the `hint` watch subcommand for a hint.
// I AM NOT DONE
use std::collections::HashMap;
// 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_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_entry = scores.entry(team_1_name.clone()).or_insert(Team {
name: team_1_name,
goals_scored: 0,
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
}