Решение на упр.03 задача 3 от Венислав Трендафилов
Към профила на Венислав Трендафилов
Резултати
- 2 точки от тестове
- 0 бонус точки
- 2 точки общо
- 2 успешни тест(а)
- 0 неуспешни тест(а)
Код
use std::collections::HashMap;
enum Event {
Login { user: String, timestamp: u64 },
Logout { user: String, timestamp: u64 },
Purchase { user: String, item: String, amount: f64, timestamp: u64 },
Error { code: i32, message: String, timestamp: u64 }
}
struct EventLog { events: Vec<Event>, }
impl EventLog {
fn new() -> EventLog {
EventLog { events: Vec::new() }
}
fn add_event(&mut self, event: Event) {
self.events.push(event);
}
fn user_spent(&self, user: &str) -> f64 {
let mut sum: f64 = 0.0;
for event in self.events.iter() {
if let Event::Purchase { user: u, amount, .. } = event {
if u == user {
sum += amount;
}
}
}
sum
}
fn summaries_by_type(&self) -> HashMap<String, usize> {
let mut summaries = HashMap::new();
for event in self.events.iter() {
match event {
Event::Login { .. } => {
*summaries.entry("Login".to_string()).or_insert(0) += 1;
},
Event::Logout { .. } => {
*summaries.entry("Logout".to_string()).or_insert(0) += 1;
},
Event::Purchase { .. } => {
*summaries.entry("Purchase".to_string()).or_insert(0) += 1;
},
Event::Error { .. } => {
*summaries.entry("Error".to_string()).or_insert(0) += 1;
}
}
}
summaries
}
fn filter_events(&self, user: Option<&str>, after: Option<u64>) -> Vec<&Event> {
let mut result = Vec::new();
for event in self.events.iter() {
let user_match = match user {
Some(u) => match event {
Event::Login { user: u1, ..} => u == u1,
Event::Logout { user: u1, ..} => u == u1,
Event::Purchase { user: u1, ..} => u == u1,
Event::Error {..} => false,
},
None => true,
};
let after_match = match after {
Some(ts) => match event {
Event::Login { timestamp: ts1, .. } => *ts1 > ts,
Event::Logout { timestamp: ts1, .. } => *ts1 > ts,
Event::Purchase { timestamp: ts1, .. } => *ts1 > ts,
Event::Error { timestamp: ts1, .. } => *ts1 > ts,
},
None => true,
};
if user_match && after_match {
result.push(event);
}
}
result
}
}
Лог от изпълнението
Updating crates.io index
Locking 17 packages to latest compatible versions
Compiling proc-macro2 v1.0.103
Compiling unicode-ident v1.0.22
Compiling quote v1.0.41
Compiling futures-core v0.3.31
Compiling futures-sink v0.3.31
Compiling futures-channel v0.3.31
Compiling futures-task v0.3.31
Compiling slab v0.4.11
Compiling futures-io v0.3.31
Compiling syn v2.0.108
Compiling pin-utils v0.1.0
Compiling memchr v2.7.6
Compiling pin-project-lite v0.2.16
Compiling solution v0.1.0 (/tmp/d20251030-1757769-8cdm02/solution)
warning: enum `Event` is never used
--> src/lib.rs:2:6
|
2 | enum Event {
| ^^^^^
|
= note: `#[warn(dead_code)]` on by default
warning: struct `EventLog` is never constructed
--> src/lib.rs:9:8
|
9 | struct EventLog { events: Vec<Event>, }
| ^^^^^^^^
warning: associated items `new`, `add_event`, `user_spent`, `summaries_by_type`, and `filter_events` are never used
--> src/lib.rs:12:8
|
11 | impl EventLog {
| ------------- associated items in this implementation
12 | fn new() -> EventLog {
| ^^^
...
16 | fn add_event(&mut self, event: Event) {
| ^^^^^^^^^
...
20 | fn user_spent(&self, user: &str) -> f64 {
| ^^^^^^^^^^
...
32 | fn summaries_by_type(&self) -> HashMap<String, usize> {
| ^^^^^^^^^^^^^^^^^
...
55 | fn filter_events(&self, user: Option<&str>, after: Option<u64>) -> Vec<&Event> {
| ^^^^^^^^^^^^^
warning: `solution` (lib) generated 3 warnings
Compiling futures-macro v0.3.31
Compiling futures-util v0.3.31
Compiling futures-executor v0.3.31
Compiling futures v0.3.31
Finished `test` profile [unoptimized + debuginfo] target(s) in 8.66s
Running tests/solution_test.rs (target/debug/deps/solution_test-bfd50394249726db)
running 2 tests
test solution_test::test_empty ... ok
test solution_test::test_basic ... ok
test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s