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This commit is contained in:
Pratik Sharma 2023-03-19 17:36:35 +05:30
parent 259b434f20
commit 391e22e5e8
1 changed files with 9 additions and 7 deletions
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16
exercises/vecs/vecs2.rs
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@ -6,13 +6,13 @@
// //
// 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 // I AM NOT
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 // 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].
@ -20,11 +20,13 @@ fn vec_loop(mut v: Vec<i32>) -> Vec<i32> {
} }
fn vec_map(v: &Vec<i32>) -> Vec<i32> { fn vec_map(v: &Vec<i32>) -> Vec<i32> {
v.iter().map(|num| { v.iter()
// TODO: Do the same thing as above - but instead of mutating the .map(|num| {
// Vec, you can just return the new number! // TODO: Do the same thing as above - but instead of mutating the
??? // Vec, you can just return the new number!
}).collect() num * 2
})
.collect()
} }
#[cfg(test)] #[cfg(test)]