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vec

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This commit is contained in:
Daniil Moiseev 2022-09-21 21:17:30 +00:00 committed by Daniil
parent 8781a28458
commit 147c455b7d
2 changed files with 8 additions and 8 deletions
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10
exercises/vecs/vecs1.rs
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@ -7,12 +7,14 @@
// //
// Execute `rustlings hint vecs1` or use the `hint` watch subcommand for a hint. // Execute `rustlings hint vecs1` or use the `hint` watch subcommand for a hint.
// 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 mut v: Vec<i32> = Vec::new(); // TODO: declare your vector here with the macro for vectors
// v.push(10);
// v.push(20);
// v.push(30);
// v.push(40);
let v = vec![10, 20, 30, 40];
(a, v) (a, v)
} }

6
exercises/vecs/vecs2.rs
View File

@ -7,13 +7,11 @@
// //
// Execute `rustlings hint vecs2` or use the `hint` watch subcommand for a hint. // Execute `rustlings hint vecs2` or use the `hint` watch subcommand for a hint.
// I AM NOT DONE
fn vec_loop(mut v: Vec<i32>) -> Vec<i32> { fn vec_loop(mut v: Vec<i32>) -> Vec<i32> {
for element in v.iter_mut() { for element in v.iter_mut() {
// TODO: Fill this up so that each element in the Vec `v` is // TODO: Fill this up so that each element in the Vec `v` is
// multiplied by 2. // multiplied by 2.
??? *i = *i * 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].
@ -24,7 +22,7 @@ fn vec_map(v: &Vec<i32>) -> Vec<i32> {
v.iter().map(|element| { v.iter().map(|element| {
// TODO: Do the same thing as above - but instead of mutating the // TODO: Do the same thing as above - but instead of mutating the
// Vec, you can just return the new number! // Vec, you can just return the new number!
??? num * 2
}).collect() }).collect()
} }