Решение на упр.07 задача 1 от Стилиян Иванов
Резултати
- 4 точки от тестове
- 0 бонус точки
- 4 точки общо
- 2 успешни тест(а)
- 0 неуспешни тест(а)
Код
use std::collections::HashMap;
use std::str::FromStr;
struct Map<I, F>
where
I: Iterator,
{
iter: I,
f: F,
}
fn iter_map<I, F, U>(iter: I, f: F) -> Map<I, F>
where
I: Iterator,
F: FnMut(I::Item) -> U,
{
Map { iter, f }
}
impl<I, F, U> Iterator for Map<I, F>
where
I: Iterator,
F: FnMut(I::Item) -> U,
{
type Item = U;
fn next(&mut self) -> Option<Self::Item> {
self.iter.next().map(&mut self.f)
}
}
struct Filter<I, F>
where
I: Iterator,
{
iter: I,
f: F,
}
fn iter_filter<I, F>(iter: I, func: F) -> Filter<I, F>
where
I: Iterator,
F: FnMut(&I::Item) -> bool,
{
Filter { iter, f: func }
}
impl<I, F> Iterator for Filter<I, F>
where
I: Iterator,
F: FnMut(&I::Item) -> bool,
{
type Item = I::Item;
fn next(&mut self) -> Option<Self::Item> {
loop {
let next_item = self.iter.next();
let item = match next_item {
Some(i) => i,
None => return None,
};
if (self.f)(&item) {
return Some(item);
}
}
}
}
fn iter_filter_map<I, F, U>(iter: I, func: F) -> impl Iterator<Item = U>
where
I: Iterator,
F: Fn(I::Item) -> Option<U>,
{
let mapped_iter = iter_map(iter, func);
let filtered_iter = iter_filter(mapped_iter, |opt_u: &Option<U>| opt_u.is_some());
iter_map(filtered_iter, |opt_u: Option<U>| opt_u.unwrap())
}
#[derive(Debug, Eq, PartialEq)]
struct FoundWord<'a>(&'a str);
fn get_sum(text: &str) -> i32 {
text.lines()
.filter_map(|line| {
line.trim().parse::<i32>().ok()
})
.sum()
}
fn get_num_list(text: &str) -> Result<Vec<i32>, FoundWord<'_>> {
text.lines()
.filter(|line| !line.trim().is_empty())
.map(|line| {
let trimmed = line.trim();
match trimmed.parse::<i32>() {
Ok(num) => Ok(num),
Err(_) => Err(FoundWord(trimmed)),
}
})
.collect()
}
Лог от изпълнението
Updating crates.io index
Locking 17 packages to latest compatible versions
Compiling proc-macro2 v1.0.103
Compiling quote v1.0.42
Compiling unicode-ident v1.0.22
Compiling futures-core v0.3.31
Compiling futures-sink v0.3.31
Compiling futures-channel v0.3.31
Compiling pin-project-lite v0.2.16
Compiling futures-task v0.3.31
Compiling syn v2.0.111
Compiling memchr v2.7.6
Compiling pin-utils v0.1.0
Compiling slab v0.4.11
Compiling futures-io v0.3.31
Compiling solution v0.1.0 (/tmp/d20251127-1757769-1eholxe/solution)
warning: unused import: `std::collections::HashMap`
--> src/lib.rs:1:5
|
1 | use std::collections::HashMap;
| ^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(unused_imports)]` on by default
warning: unused import: `std::str::FromStr`
--> src/lib.rs:2:5
|
2 | use std::str::FromStr;
| ^^^^^^^^^^^^^^^^^
warning: struct `Map` is never constructed
--> src/lib.rs:4:8
|
4 | struct Map<I, F>
| ^^^
|
= note: `#[warn(dead_code)]` on by default
warning: function `iter_map` is never used
--> src/lib.rs:12:4
|
12 | fn iter_map<I, F, U>(iter: I, f: F) -> Map<I, F>
| ^^^^^^^^
warning: struct `Filter` is never constructed
--> src/lib.rs:32:8
|
32 | struct Filter<I, F>
| ^^^^^^
warning: function `iter_filter` is never used
--> src/lib.rs:40:4
|
40 | fn iter_filter<I, F>(iter: I, func: F) -> Filter<I, F>
| ^^^^^^^^^^^
warning: function `iter_filter_map` is never used
--> src/lib.rs:72:4
|
72 | fn iter_filter_map<I, F, U>(iter: I, func: F) -> impl Iterator<Item = U>
| ^^^^^^^^^^^^^^^
warning: struct `FoundWord` is never constructed
--> src/lib.rs:85:8
|
85 | struct FoundWord<'a>(&'a str);
| ^^^^^^^^^
warning: function `get_sum` is never used
--> src/lib.rs:87:4
|
87 | fn get_sum(text: &str) -> i32 {
| ^^^^^^^
warning: function `get_num_list` is never used
--> src/lib.rs:95:4
|
95 | fn get_num_list(text: &str) -> Result<Vec<i32>, FoundWord<'_>> {
| ^^^^^^^^^^^^
warning: `solution` (lib) generated 10 warnings (run `cargo fix --lib -p solution` to apply 2 suggestions)
Compiling futures-macro v0.3.31
Compiling futures-util v0.3.31
Compiling futures-executor v0.3.31
Compiling futures v0.3.31
warning: unused import: `std::collections::HashMap`
--> tests/../src/lib.rs:1:5
|
1 | use std::collections::HashMap;
| ^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(unused_imports)]` on by default
warning: unused import: `std::str::FromStr`
--> tests/../src/lib.rs:2:5
|
2 | use std::str::FromStr;
| ^^^^^^^^^^^^^^^^^
warning: `solution` (test "solution_test") generated 2 warnings (run `cargo fix --test "solution_test"` to apply 2 suggestions)
Finished `test` profile [unoptimized + debuginfo] target(s) in 8.31s
Running tests/solution_test.rs (target/debug/deps/solution_test-ee0783488e12dce9)
running 2 tests
test solution_test::test_adapters_ ... ok
test solution_test::test_text_parsers_ ... ok
test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s