vecs done
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@ -7,12 +7,10 @@
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//
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//
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// Execute `rustlings hint vecs1` or use the `hint` watch subcommand for a hint.
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// Execute `rustlings hint vecs1` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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fn array_and_vec() -> ([i32; 4], Vec<i32>) {
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fn array_and_vec() -> ([i32; 4], Vec<i32>) {
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let a = [10, 20, 30, 40]; // a plain array
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let a = [10, 20, 30, 40]; // a plain array
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let v = // TODO: declare your vector here with the macro for vectors
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let v: Vec<i32> = a.to_vec();
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(a, v)
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(a, v)
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}
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}
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@ -7,13 +7,12 @@
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//
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//
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// Execute `rustlings hint vecs2` or use the `hint` watch subcommand for a hint.
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// Execute `rustlings hint vecs2` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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fn vec_loop(mut v: Vec<i32>) -> Vec<i32> {
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fn vec_loop(mut v: Vec<i32>) -> Vec<i32> {
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for element in v.iter_mut() {
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for element in v.iter_mut() {
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// TODO: Fill this up so that each element in the Vec `v` is
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// TODO: Fill this up so that each element in the Vec `v` is
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// multiplied by 2.
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// multiplied by 2.
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???
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*element *= 2;
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}
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}
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// At this point, `v` should be equal to [4, 8, 12, 16, 20].
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// At this point, `v` should be equal to [4, 8, 12, 16, 20].
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@ -24,7 +23,7 @@ fn vec_map(v: &Vec<i32>) -> Vec<i32> {
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v.iter().map(|element| {
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v.iter().map(|element| {
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// TODO: Do the same thing as above - but instead of mutating the
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// TODO: Do the same thing as above - but instead of mutating the
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// Vec, you can just return the new number!
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// Vec, you can just return the new number!
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???
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2 * element
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}).collect()
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}).collect()
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}
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}
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