Решение на упр.03 задача 3 от Деян Делчев
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 {
pub fn new() -> EventLog {
EventLog { events: Vec::new() }
}
pub fn add_event(&mut self, event: Event) {
self.events.push(event);
}
pub fn user_spent(&self, user: &str) -> f64 {
let mut total_amount = 0.0;
for event in &self.events {
if let Event::Purchase {
user: event_user,
amount: event_amount,
..
} = event
{
if event_user == user {
total_amount += event_amount;
}
}
}
total_amount
}
pub fn summaries_by_type(&self) -> HashMap<String, usize> {
let mut map = HashMap::new();
for event in &self.events {
let event_str = match event {
Event::Login { .. } => "Login",
Event::Logout { .. } => "Logout",
Event::Purchase { .. } => "Purchase",
Event::Error { .. } => "Error",
}
.to_owned();
map.entry(event_str)
.and_modify(|c| *c += 1 as usize)
.or_insert(1 as usize);
}
map
}
pub fn filter_events(&self, user: Option<&str>, after: Option<u64>) -> Vec<&Event> {
self.events
.iter()
.filter(|event| {
let (event_user, event_timestamp) = match event {
Event::Login { user, timestamp } => (user, timestamp),
Event::Logout { user, timestamp } => (user, timestamp),
Event::Purchase {
user, timestamp, ..
} => (user, timestamp),
Event::Error { .. } => return false,
};
if let Some(user) = user {
if user != event_user {
return false;
}
}
if let Some(timestamp) = after {
if timestamp > *event_timestamp {
return false;
}
}
true
})
.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 futures-io v0.3.31
Compiling memchr v2.7.6
Compiling syn v2.0.108
Compiling pin-project-lite v0.2.16
Compiling pin-utils v0.1.0
Compiling futures-task v0.3.31
Compiling slab v0.4.11
Compiling solution v0.1.0 (/tmp/d20251030-1757769-1v2ff7r/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:25:8
|
25 | struct EventLog {
| ^^^^^^^^
warning: associated items `new`, `add_event`, `user_spent`, `summaries_by_type`, and `filter_events` are never used
--> src/lib.rs:30:12
|
29 | impl EventLog {
| ------------- associated items in this implementation
30 | pub fn new() -> EventLog {
| ^^^
...
34 | pub fn add_event(&mut self, event: Event) {
| ^^^^^^^^^
...
38 | pub fn user_spent(&self, user: &str) -> f64 {
| ^^^^^^^^^^
...
55 | pub fn summaries_by_type(&self) -> HashMap<String, usize> {
| ^^^^^^^^^^^^^^^^^
...
72 | pub 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 13.41s
Running tests/solution_test.rs (target/debug/deps/solution_test-bfd50394249726db)
running 2 tests
test solution_test::test_basic ... ok
test solution_test::test_empty ... ok
test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
История (2 версии и 0 коментара)
Деян качи решение на 28.10.2025 14:29 (преди 3 дена)
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 {
pub fn new() -> EventLog {
EventLog { events: Vec::new() }
}
pub fn add_event(&mut self, event: Event) {
self.events.push(event);
}
pub fn user_spent(&self, user: &str) -> f64 {
let mut total_amount = 0.0;
for event in &self.events {
if let Event::Purchase {
user: event_user,
amount: event_amount,
..
} = event
{
if event_user == user {
- total_amount = total_amount + event_amount;
+ total_amount += event_amount;
}
}
}
total_amount
}
pub fn summaries_by_type(&self) -> HashMap<String, usize> {
let mut map = HashMap::new();
for event in &self.events {
let event_str = match event {
Event::Login { .. } => "Login",
Event::Logout { .. } => "Logout",
Event::Purchase { .. } => "Purchase",
Event::Error { .. } => "Error",
}
.to_owned();
map.entry(event_str)
- .and_modify(|c| *c = *c + 1 as usize)
+ .and_modify(|c| *c += 1 as usize)
.or_insert(1 as usize);
}
map
}
pub fn filter_events(&self, user: Option<&str>, after: Option<u64>) -> Vec<&Event> {
self.events
.iter()
.filter(|event| {
let (event_user, event_timestamp) = match event {
Event::Login { user, timestamp } => (user, timestamp),
Event::Logout { user, timestamp } => (user, timestamp),
Event::Purchase {
user, timestamp, ..
} => (user, timestamp),
Event::Error { .. } => return false,
};
if let Some(user) = user {
if user != event_user {
return false;
}
}
if let Some(timestamp) = after {
if timestamp > *event_timestamp {
return false;
}
}
true
})
.collect()
}
-}
+}