Решение на упр.03 задача 3 от Йоан Грозев
Резултати
- 2 точки от тестове
- 0 бонус точки
- 2 точки общо
- 2 успешни тест(а)
- 0 неуспешни тест(а)
Код
use std::collections::HashMap;
#[derive(Clone)]
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 amount = 0.0;
for z in self.events.iter()
{
match z
{
Event::Purchase { user: x, item: _, amount: y, timestamp: _} if user == &x[..] =>amount = amount + y,
_ => continue,
}
}
amount
}
fn summaries_by_type(&self) -> HashMap<String, usize>
{
let mut hashmap:HashMap<String,usize> = HashMap::new();
for z in self.events.iter()
{
let key = match z
{
Event::Login { user:_, timestamp: _ } => "Login",
Event::Logout { user: _, timestamp: _ }=> "Logout",
Event::Purchase { user: _, item: _, amount: _, timestamp: _ }=>"Purchase",
Event::Error { code: _, message: _, timestamp: _ }=> "Error",
};
*hashmap.entry(key.to_string()).or_insert(0)+=1;
}
hashmap
}
fn filter_events(&self, user: Option<&str>, after: Option<u64>) -> Vec<&Event>
{
if user.is_none() && after.is_none() {
return self.events.iter().collect();
}
let mut result = Vec::new();
for event in &self.events
{
if let Some(u) = user {
let eventUser = match event {
Event::Login { user:u, timestamp: _ }
| Event::Logout { user:u, timestamp: _ }
| Event::Purchase { user:u, item: _, amount: _, timestamp: _ } => u,
Event::Error { .. } => continue,
};
if eventUser != u {
continue;
}
}
if let Some(t) = after {
let eventTime = match event {
|Event::Login { user:_, timestamp: t }
| Event::Logout { user:_, timestamp: t }
| Event::Purchase { user:_, item: _, amount: _, timestamp: t }
|Event::Error { code: _, message: _, timestamp: t } => t,
};
if eventTime <= &t
{
continue;
}
}
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 quote v1.0.41
Compiling unicode-ident v1.0.22
Compiling futures-sink v0.3.31
Compiling futures-core v0.3.31
Compiling futures-channel v0.3.31
Compiling futures-task v0.3.31
Compiling pin-utils v0.1.0
Compiling syn v2.0.108
Compiling pin-project-lite v0.2.16
Compiling memchr v2.7.6
Compiling futures-io v0.3.31
Compiling slab v0.4.11
Compiling solution v0.1.0 (/tmp/d20251030-1757769-cn7eri/solution)
warning: enum `Event` is never used
--> src/lib.rs:4:6
|
4 | enum Event {
| ^^^^^
|
= note: `#[warn(dead_code)]` on by default
warning: struct `EventLog` is never constructed
--> src/lib.rs:12:8
|
12 | struct EventLog {
| ^^^^^^^^
warning: associated items `new`, `add_event`, `user_spent`, `summaries_by_type`, and `filter_events` are never used
--> src/lib.rs:17:8
|
16 | impl EventLog {
| ------------- associated items in this implementation
17 | fn new() -> EventLog {
| ^^^
...
21 | fn add_event(&mut self, event: Event)
| ^^^^^^^^^
...
26 | fn user_spent(&self, user: &str) -> f64
| ^^^^^^^^^^
...
40 | fn summaries_by_type(&self) -> HashMap<String, usize>
| ^^^^^^^^^^^^^^^^^
...
58 | fn filter_events(&self, user: Option<&str>, after: Option<u64>) -> Vec<&Event>
| ^^^^^^^^^^^^^
warning: variable `eventUser` should have a snake case name
--> src/lib.rs:70:21
|
70 | let eventUser = match event {
| ^^^^^^^^^ help: convert the identifier to snake case: `event_user`
|
= note: `#[warn(non_snake_case)]` on by default
warning: variable `eventTime` should have a snake case name
--> src/lib.rs:83:22
|
83 | let eventTime = match event {
| ^^^^^^^^^ help: convert the identifier to snake case: `event_time`
warning: `solution` (lib) generated 5 warnings
Compiling futures-macro v0.3.31
Compiling futures-util v0.3.31
Compiling futures-executor v0.3.31
Compiling futures v0.3.31
warning: variable `eventUser` should have a snake case name
--> tests/../src/lib.rs:70:21
|
70 | let eventUser = match event {
| ^^^^^^^^^ help: convert the identifier to snake case: `event_user`
|
= note: `#[warn(non_snake_case)]` on by default
warning: variable `eventTime` should have a snake case name
--> tests/../src/lib.rs:83:22
|
83 | let eventTime = match event {
| ^^^^^^^^^ help: convert the identifier to snake case: `event_time`
warning: `solution` (test "solution_test") generated 2 warnings
Finished `test` profile [unoptimized + debuginfo] target(s) in 9.87s
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