Решение на упр.07 задача 1 от Йоан Грозев
Резултати
- 4 точки от тестове
- 0 бонус точки
- 4 точки общо
- 2 успешни тест(а)
- 0 неуспешни тест(а)
Код
pub struct Map<I, F>
{
iter: I,
func: F,
}
pub fn iter_map<I, F, U>(iter: I, f: F) -> Map<I, F>
where
I: Iterator,
F: Fn(I::Item) -> U,
{
Map { iter, func: f }
}
impl<I, F, U> Iterator for Map<I, F>
where
I: Iterator,
F: Fn(I::Item) -> U,
{
type Item = U;
fn next(&mut self) -> Option<Self::Item>
{
self.iter.next().map(&self.func)
}
}
pub struct Filter<I, F>
{
iter: I,
func: F,
}
pub fn iter_filter<I, F>(iter: I, func: F) -> Filter<I, F>
where
I: Iterator,
F: Fn(&I::Item) -> bool,
{
Filter { iter, func }
}
impl<I, F> Iterator for Filter<I, F>
where
I: Iterator,
F: Fn(&I::Item) -> bool,
{
type Item = I::Item;
fn next(&mut self) -> Option<Self::Item>
{
while let Some(x) = self.iter.next()
{
if (self.func)(&x)
{
return Some(x);
}
}
None
}
}
pub 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_map(iter, func);
let filtered = iter_filter(mapped, |x: &Option<U>| x.is_some());
iter_map(filtered, |x| x.unwrap())
}
fn parse_line(line: &str) -> Result<Option<i32>, FoundWord<'_>>
{
let trimmed = line.trim();
if trimmed.is_empty()
{
return Ok(None);
}
match trimmed.parse::<i32>()
{
Ok(n) => Ok(Some(n)),
Err(_) => Err(FoundWord(trimmed)),
}
}
pub fn get_sum(text: &str) -> i32
{
text.lines().filter_map(|line| line.trim().parse::<i32>().ok()).sum()
}
#[derive(Debug, Eq, PartialEq)]
pub struct FoundWord<'a>(pub &'a str);
pub fn get_num_list(text: &str) -> Result<Vec<i32>, FoundWord<'_>>
{
text.lines().map(|line| parse_line(line)).filter(|res| !matches!(res, Ok(None))).map(|res| res.map(|x| x.unwrap())).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 v1.0.42
Compiling futures-core v0.3.31
Compiling futures-sink v0.3.31
Compiling futures-channel v0.3.31
Compiling slab v0.4.11
Compiling syn v2.0.111
Compiling memchr v2.7.6
Compiling futures-io v0.3.31
Compiling pin-project-lite v0.2.16
Compiling futures-task v0.3.31
Compiling pin-utils v0.1.0
Compiling solution v0.1.0 (/tmp/d20251127-1757769-13ysy2g/solution)
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 8.48s
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