Решение на FMI Buzz от Борис Петров

Обратно към всички решения

Към профила на Борис Петров

Код

pub fn fizzbuzz(n: usize) -> Vec<String> {

let mut result: Vec<String> = Vec::new();

for number in 1..n + 1 {

result.push(match number {

num if num % 3 != 0 && num % 5 != 0 => number.to_string(),

num if num % 3 == 0 && num % 5 != 0 => String::from("Fizz"),

num if num % 3 != 0 && num % 5 == 0 => String::from("Buzz"),

num if num % 3 == 0 && num % 5 == 0 => String::from("Fizzbuzz"),

_ => String::new(),

Вместо default-на стойност, по-скоро тук бих сложил unreachable!(), за да укажа, че това никога не би трябвало да се случи. Ако все пак се случи, значи горната логика някакси не е правилна и по-добре програмата да спре, вместо да генерира невалиден изход. Паниката лесно се вижда като бъг, невалидния изход по-трудно се забелязва и дебъгва.

Андрей коментира преди почти 5 години

});

}

result

}

pub fn custom_buzz(n: usize, k1: u8, k2: u8) -> Vec<String> {

let mut result: Vec<String> = Vec::new();

for number in 1..n + 1 {

result.push(match number {

num if num % usize::from(k1) != 0 && num % usize::from(k2) != 0 => number.to_string(),

num if num % usize::from(k1) == 0 && num % usize::from(k2) != 0 => String::from("Fizz"),

num if num % usize::from(k1) != 0 && num % usize::from(k2) == 0 => String::from("Buzz"),

num if num % usize::from(k1) == 0 && num % usize::from(k2) == 0 => {

String::from("Fizzbuzz")

}

_ => String::new(),

});

}

result

}

pub struct FizzBuzzer {

pub k1: u8,

pub k2: u8,

pub labels: [String; 3],

}

impl FizzBuzzer {

pub fn take(&self, n: usize) -> Vec<String> {

let mut result: Vec<String> = Vec::new();

for number in 1..n + 1 {

result.push(match number {

num if num % usize::from(self.k1) != 0 && num % usize::from(self.k2) != 0 => {

number.to_string()

}

num if num % usize::from(self.k1) == 0 && num % usize::from(self.k2) != 0 => {

self.labels[0].clone()

}

num if num % usize::from(self.k1) != 0 && num % usize::from(self.k2) == 0 => {

self.labels[1].clone()

}

num if num % usize::from(self.k1) == 0 && num % usize::from(self.k2) == 0 => {

self.labels[2].clone()

}

_ => String::new(),

});

}

result

}

pub fn change_label(&mut self, index: usize, value: &String) {

self.labels[index] = value.clone();

}

}

Лог от изпълнението

Compiling solution v0.1.0 (/tmp/d20201028-2816268-7bvofz/solution)
    Finished test [unoptimized + debuginfo] target(s) in 2.08s
     Running target/debug/deps/solution-ebb42508826ef2b4

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out

     Running target/debug/deps/solution_test-9e954a53ed808c89

running 10 tests
test solution_test::test_change_label_basic ... ok
test solution_test::test_change_label_invalid ... ok
test solution_test::test_classic1 ... ok
test solution_test::test_classic2 ... ok
test solution_test::test_coefficients1 ... ok
test solution_test::test_coefficients2 ... ok
test solution_test::test_coefficients_invalid ... FAILED
test solution_test::test_struct_basic ... ok
test solution_test::test_struct_invalid ... FAILED
test solution_test::test_zeroes ... ok

failures:

---- solution_test::test_coefficients_invalid stdout ----
thread 'main' panicked at 'attempt to calculate the remainder with a divisor of zero', src/lib.rs:20:50
thread 'main' panicked at 'attempt to calculate the remainder with a divisor of zero', src/lib.rs:20:20
thread 'main' panicked at 'assertion failed: catch_unwind(|| { custom_buzz(10, 3, 1); }).is_err()', tests/solution_test.rs:66:5

---- solution_test::test_struct_invalid stdout ----
thread 'main' panicked at 'attempt to calculate the remainder with a divisor of zero', src/lib.rs:44:59
thread 'main' panicked at 'attempt to calculate the remainder with a divisor of zero', src/lib.rs:44:24
thread 'main' panicked at 'assertion failed: catch_unwind(|| { fizzbuzzer!(3, 1); }).is_err()', tests/solution_test.rs:102:5


failures:
    solution_test::test_coefficients_invalid
    solution_test::test_struct_invalid

test result: FAILED. 8 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out

error: test failed, to rerun pass '--test solution_test'

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