Решение на упр.03 задача 3 от Йоанна Ненкова
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::<Event>::new()
}
}
fn add_event(&mut self, event: Event) {
self.events.push(event);
}
fn user_spent(&self, user: &str) -> f64 {
let mut result = 0.0;
for e in &self.events {
if let Event::Purchase {user: u, amount, ..} = e {
if u == user {
result += amount;
}
}
}
result
}
fn summaries_by_type(&self) -> HashMap<String, usize> {
let mut summary = HashMap::new();
for e in &self.events {
let key = match e {
Event::Login{..} => "Login",
Event::Logout{..} => "Logout",
Event::Purchase{..} => "Purchase",
Event::Error{..} => "Error",
};
*summary.entry(key.to_string()).or_insert(0) += 1;
}
summary
}
fn filter_events(&self, user: Option<&str>, after: Option<u64>) -> Vec<&Event> {
let mut user_exists = true;
if let Some(target) = user {
user_exists = false;
for e in &self.events {
if let
| Event::Login{user:u, ..}
| Event::Logout{user:u, ..}
| Event::Purchase{user:u, ..} = e {
if u == target {
user_exists = true;
break;
}
}
}
}
self.events.iter().filter(|event| match event {
| Event::Login{user: u, timestamp}
| Event::Logout{user: u, timestamp}
| Event::Purchase{user: u, timestamp, ..} => {
let user_ok = match user {
Some(target) if user_exists => u == target,
_ => true,
};
let time_ok = match after {
Some(t) => *timestamp >= t,
None => true,
};
user_ok && time_ok
}
Event::Error{..} => false,
})
.collect()
}
}
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 memchr v2.7.6
Compiling syn v2.0.108
Compiling pin-utils v0.1.0
Compiling futures-io v0.3.31
Compiling futures-task v0.3.31
Compiling slab v0.4.11
Compiling pin-project-lite v0.2.16
Compiling solution v0.1.0 (/tmp/d20251030-1757769-kq6wuj/solution)
warning: enum `Event` is never used
--> src/lib.rs:3:6
|
3 | enum Event {
| ^^^^^
|
= note: `#[warn(dead_code)]` on by default
warning: struct `EventLog` is never constructed
--> src/lib.rs:10:8
|
10 | 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:13:8
|
12 | impl EventLog {
| ------------- associated items in this implementation
13 | fn new() -> EventLog {
| ^^^
...
19 | fn add_event(&mut self, event: Event) {
| ^^^^^^^^^
...
23 | fn user_spent(&self, user: &str) -> f64 {
| ^^^^^^^^^^
...
35 | fn summaries_by_type(&self) -> HashMap<String, usize> {
| ^^^^^^^^^^^^^^^^^
...
49 | 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 8.68s
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