Решение на упр.03 задача 3 от Борил Василев
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() -> Self
{
return EventLog
{
events: Vec::new(),
};
}
fn add_event(&mut self, event: Event)
{
self.events.push(event);
}
fn user_spent(&self, specific_user: &str) -> f64
{
return self.events.iter().filter_map(|element|
{
if let Event::Purchase { user, amount, .. } = element
{
if user == specific_user
{
return Some(amount);
}
else
{
return None;
}
}
else
{
return None;
}
}).sum();
}
fn summaries_by_type(&self) -> HashMap<String, usize>
{
let mut map = HashMap::new();
for element in &self.events
{
let key = match element
{
Event::Login { .. } => "Login",
Event::Logout { .. } => "Logout",
Event::Purchase { .. } => "Purchase",
Event::Error { .. } => "Error",
};
map.entry(key.to_string()).and_modify(|count| *count += 1).or_insert(1);
}
return map;
}
fn filter_events(&self, specific_user: Option<&str>, threshold_timestamp: Option<u64>) -> Vec<&Event>
{
return self.events
.iter()
.filter(|element|
{
match element
{
Event::Error { .. } => false,
Event::Login { user, timestamp, .. } | Event::Logout { user, timestamp, .. }
| Event::Purchase { user, timestamp, .. } =>
{
let user_match = if let Some(u) = specific_user { user == u } else { true };
let timestamp_match = if let Some(t) = threshold_timestamp { *timestamp > t } else { true };
return user_match && timestamp_match;
}
}
}).collect();
}
}
Лог от изпълнението
Updating crates.io index
Blocking waiting for file lock on package cache
Locking 17 packages to latest compatible versions
Blocking waiting for file lock on package cache
Blocking waiting for file lock on package cache
Blocking waiting for file lock on package cache
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 pin-utils v0.1.0
Compiling slab v0.4.11
Compiling futures-task 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 solution v0.1.0 (/tmp/d20251030-1757769-11cbpog/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:11:8
|
11 | 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:15:8
|
13 | impl EventLog
| ------------- associated items in this implementation
14 | {
15 | fn new() -> Self
| ^^^
...
23 | fn add_event(&mut self, event: Event)
| ^^^^^^^^^
...
28 | fn user_spent(&self, specific_user: &str) -> f64
| ^^^^^^^^^^
...
50 | fn summaries_by_type(&self) -> HashMap<String, usize>
| ^^^^^^^^^^^^^^^^^
...
67 | fn filter_events(&self, specific_user: Option<&str>, threshold_timestamp: 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 15.35s
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