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This commit is contained in:
aottolini 2023-02-15 19:29:37 -03:00
parent 6d22e3a2bb
commit 48350051bc
1 changed files with 34 additions and 61 deletions
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95
exercises/hashmaps/hashmaps3.rs
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@ -18,7 +18,6 @@
use std::collections::HashMap; use std::collections::HashMap;
// A structure to store team name and its goal details.
struct Team { struct Team {
name: String, name: String,
goals_scored: u8, goals_scored: u8,
@ -26,69 +25,44 @@ struct Team {
} }
fn build_scores_table(results: String) -> HashMap<String, Team> { fn build_scores_table(results: String) -> HashMap<String, Team> {
// The name of the team is the key and its associated struct is the value. let mut scores = HashMap::new();
let mut scores: HashMap<String, Team> = HashMap::new(); for result in results.lines() {
let (team_1, team_2) = parse_teams(result);
for r in results.lines() { update_or_insert(&mut scores, team_1);
let v: Vec<&str> = r.split(',').collect(); update_or_insert(&mut scores, team_2);
let team_1_name = v[0].to_string();
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 t1: Team = Team {
name: team_1_name.clone(),
goals_scored: team_1_score,
goals_conceded: team_2_score,
};
let t2: Team = Team {
name: team_2_name.clone(),
goals_scored: team_2_score,
goals_conceded: team_1_score,
};
let t1 = scores
.entry(team_1_name)
.and_modify(|ot1| {
ot1.goals_scored += t1.goals_scored;
ot1.goals_conceded += t1.goals_conceded;
})
.or_insert(t1);
let t2 = scores
.entry(team_2_name)
.and_modify(|ot2| {
ot2.goals_scored += t2.goals_scored;
ot2.goals_conceded += t2.goals_conceded;
})
.or_insert(t2);
// match scores.get_mut(&team_1_name){
// Some(ot1) => {
// ot1.goals_scored += t1.goals_scored;
// ot1.goals_conceded += t1.goals_conceded;
// },
// None => {scores.insert(team_1_name, t1);},
// }
//
// match scores.get_mut(&team_2_name){
// Some(ot2) => {
// ot2.goals_scored += t2.goals_scored;
// ot2.goals_conceded += t2.goals_conceded;
// },
// None => {scores.insert(team_2_name, t2);},
// }
//
} }
scores scores
} }
fn parse_teams(result: &str) -> (Team, Team) {
let result = result.split(',').collect::<Vec<&str>>();
let team_1_name = result[0].to_string();
let team_1_score = result[2].parse().unwrap();
let team_2_name = result[1].to_string();
let team_2_score = result[3].parse().unwrap();
let team_1 = Team {
name: team_1_name,
goals_scored: team_1_score,
goals_conceded: team_2_score,
};
let team_2 = Team {
name: team_2_name,
goals_scored: team_2_score,
goals_conceded: team_1_score,
};
(team_1, team_2)
}
fn update_or_insert(scores: &mut HashMap<String, Team>, team: Team) {
scores
.entry(team.name.clone())
.and_modify(|t| {
t.goals_scored += team.goals_scored;
t.goals_conceded += team.goals_conceded;
})
.or_insert(team);
}
#[cfg(test)] #[cfg(test)]
mod tests { mod tests {
use super::*; use super::*;
@ -105,7 +79,6 @@ mod tests {
#[test] #[test]
fn build_scores() { fn build_scores() {
let scores = build_scores_table(get_results()); let scores = build_scores_table(get_results());
let mut keys: Vec<&String> = scores.keys().collect(); let mut keys: Vec<&String> = scores.keys().collect();
keys.sort(); keys.sort();
assert_eq!( assert_eq!(