Решение на упр.05 задача 1 от Илиян Гаврилов
Резултати
- 1 точка от тестове
- 0 бонус точки
- 1 точка общо
- 1 успешни тест(а)
- 0 неуспешни тест(а)
Код
use std::collections::HashMap;
use std::hash::Hash;
pub trait MyFromIterator<A> {
fn my_from_iter<I>(iter: I) -> Self
where
I: Iterator<Item = A>;
}
// итератор по T -> Vec<T>
impl<T> MyFromIterator<T> for Vec<T> {
fn my_from_iter<I>(iter: I) -> Self
where I: Iterator<Item = T>
{
let mut result = Vec::new();
for item in iter {
result.push(item);
}
result
}
}
// итератор по char -> String
impl MyFromIterator<char> for String {
fn my_from_iter<I>(iter: I) -> Self
where I: Iterator<Item = char>
{
let mut result = String::new();
for ch in iter {
result.push(ch);
}
result
}
}
// интератор по (K, V) -> HashMap<K, V>
impl<K, V> MyFromIterator<(K, V)> for HashMap<K, V>
where K: Eq + Hash {
fn my_from_iter<I>(iter: I) -> Self
where I: Iterator<Item = (K, V)>,
{
let mut result = HashMap::new();
for (k, v) in iter {
result.insert(k, v);
}
result
}
}
fn my_collect<I, C>(iter: I) -> C
where
I: Iterator,
C: MyFromIterator<I::Item>
{
C::my_from_iter(iter)
}
fn main() {
let _bytes: Vec<u8> = my_collect("hello".bytes());
let _chars: Vec<char> = my_collect("hello".chars());
let _index_to_char: HashMap<usize, char> = my_collect("hello".char_indices());
let _digits: String = my_collect("1a2b3c4d".chars().filter(|c| c.is_digit(10)));
}
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-sink v0.3.31
Compiling futures-core v0.3.31
Compiling futures-channel v0.3.31
Compiling pin-utils v0.1.0
Compiling futures-task v0.3.31
Compiling futures-io v0.3.31
Compiling memchr v2.7.6
Compiling syn v2.0.110
Compiling pin-project-lite v0.2.16
Compiling slab v0.4.11
Compiling solution v0.1.0 (/tmp/d20251113-1757769-ec39o6/solution)
warning: function `my_collect` is never used
--> src/lib.rs:56:4
|
56 | fn my_collect<I, C>(iter: I) -> C
| ^^^^^^^^^^
|
= note: `#[warn(dead_code)]` on by default
warning: function `main` is never used
--> src/lib.rs:64:4
|
64 | fn main() {
| ^^^^
warning: `solution` (lib) generated 2 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: function `main` is never used
--> tests/../src/lib.rs:64:4
|
64 | fn main() {
| ^^^^
|
= note: `#[warn(dead_code)]` on by default
warning: `solution` (test "solution_test") generated 1 warning
Finished `test` profile [unoptimized + debuginfo] target(s) in 15.85s
Running tests/solution_test.rs (target/debug/deps/solution_test-f75e629a1d90e17c)
running 1 test
test solution_test::test_basic ... ok
test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s