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exercises

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This commit is contained in:
Hanai 2022-07-16 21:30:40 +08:00
parent 6ec5dc3140
commit 504738f2c9
5 changed files with 6 additions and 19 deletions
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4
exercises/collections/vec1.rs
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@ -4,11 +4,9 @@
// Make me compile and pass the test! // Make me compile and pass the test!
// Execute the command `rustlings hint vec1` if you need hints. // Execute the command `rustlings hint vec1` if you need hints.
// I AM NOT DONE
fn array_and_vec() -> ([i32; 4], Vec<i32>) { fn array_and_vec() -> ([i32; 4], Vec<i32>) {
let a = [10, 20, 30, 40]; // a plain array let a = [10, 20, 30, 40]; // a plain array
let v = // TODO: declare your vector here with the macro for vectors let v = Vec::from(a);
(a, v) (a, v)
} }

5
exercises/collections/vec2.rs
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@ -7,12 +7,9 @@
// Execute the command `rustlings hint vec2` if you need // Execute the command `rustlings hint vec2` if you need
// hints. // hints.
// I AM NOT DONE
fn vec_loop(mut v: Vec<i32>) -> Vec<i32> { fn vec_loop(mut v: Vec<i32>) -> Vec<i32> {
for i in v.iter_mut() { for i in v.iter_mut() {
// TODO: Fill this up so that each element in the Vec `v` is *i *= 2;
// multiplied by 2.
} }
// At this point, `v` should be equal to [4, 8, 12, 16, 20]. // At this point, `v` should be equal to [4, 8, 12, 16, 20].

4
exercises/modules/modules1.rs
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@ -1,15 +1,13 @@
// modules1.rs // modules1.rs
// Make me compile! Execute `rustlings hint modules1` for hints :) // Make me compile! Execute `rustlings hint modules1` for hints :)
// I AM NOT DONE
mod sausage_factory { mod sausage_factory {
// Don't let anybody outside of this module see this! // Don't let anybody outside of this module see this!
fn get_secret_recipe() -> String { fn get_secret_recipe() -> String {
String::from("Ginger") String::from("Ginger")
} }
fn make_sausage() { pub fn make_sausage() {
get_secret_recipe(); get_secret_recipe();
println!("sausage!"); println!("sausage!");
} }

7
exercises/modules/modules2.rs
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@ -3,13 +3,10 @@
// 'use' and 'as' keywords. Fix these 'use' statements to make the code compile. // 'use' and 'as' keywords. Fix these 'use' statements to make the code compile.
// Make me compile! Execute `rustlings hint modules2` for hints :) // Make me compile! Execute `rustlings hint modules2` for hints :)
// I AM NOT DONE
mod delicious_snacks { mod delicious_snacks {
// TODO: Fix these use statements pub use self::fruits::PEAR as fruit;
use self::fruits::PEAR as ??? pub use self::veggies::CUCUMBER as veggie;
use self::veggies::CUCUMBER as ???
mod fruits { mod fruits {
pub const PEAR: &'static str = "Pear"; pub const PEAR: &'static str = "Pear";

5
exercises/modules/modules3.rs
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@ -5,10 +5,7 @@
// from the std::time module. Bonus style points if you can do it with one line! // from the std::time module. Bonus style points if you can do it with one line!
// Make me compile! Execute `rustlings hint modules3` for hints :) // Make me compile! Execute `rustlings hint modules3` for hints :)
// I AM NOT DONE use std::time::{SystemTime, UNIX_EPOCH};
// TODO: Complete this use statement
use ???
fn main() { fn main() {
match SystemTime::now().duration_since(UNIX_EPOCH) { match SystemTime::now().duration_since(UNIX_EPOCH) {