Ejercicios 32/94
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@ -1,12 +1,10 @@
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// move_semantics1.rs
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// Execute `rustlings hint move_semantics1` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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fn main() {
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let vec0 = Vec::new();
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let vec1 = fill_vec(vec0);
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let mut vec1 = fill_vec(vec0);
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println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
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@ -2,12 +2,10 @@
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// Make me compile without changing line 13 or moving line 10!
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// Execute `rustlings hint move_semantics2` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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fn main() {
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let vec0 = Vec::new();
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let mut vec1 = fill_vec(vec0);
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let mut vec1 = fill_vec(vec0.clone());
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// Do not change the following line!
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println!("{} has length {} content `{:?}`", "vec0", vec0.len(), vec0);
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@ -3,8 +3,6 @@
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// (no lines with multiple semicolons necessary!)
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// Execute `rustlings hint move_semantics3` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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fn main() {
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let vec0 = Vec::new();
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@ -17,7 +15,7 @@ fn main() {
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println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
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}
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fn fill_vec(vec: Vec<i32>) -> Vec<i32> {
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fn fill_vec(mut vec: Vec<i32>) -> Vec<i32> {
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vec.push(22);
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vec.push(44);
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vec.push(66);
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@ -4,12 +4,8 @@
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// function.
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// Execute `rustlings hint move_semantics4` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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fn main() {
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let vec0 = Vec::new();
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let mut vec1 = fill_vec(vec0);
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let mut vec1 = fill_vec();
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println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
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@ -20,7 +16,7 @@ fn main() {
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// `fill_vec()` no longer takes `vec: Vec<i32>` as argument
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fn fill_vec() -> Vec<i32> {
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let mut vec = vec;
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let mut vec = Vec::new();
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vec.push(22);
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vec.push(44);
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@ -3,13 +3,11 @@
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// adding, changing or removing any of them.
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// Execute `rustlings hint move_semantics5` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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fn main() {
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let mut x = 100;
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let y = &mut x;
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let z = &mut x;
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*y += 100;
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let z = &mut x;
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*z += 1000;
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assert_eq!(x, 1200);
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}
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@ -2,24 +2,22 @@
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// Execute `rustlings hint move_semantics6` or use the `hint` watch subcommand for a hint.
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// You can't change anything except adding or removing references.
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// I AM NOT DONE
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fn main() {
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let data = "Rust is great!".to_string();
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get_char(data);
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get_char(&data);
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string_uppercase(&data);
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string_uppercase(data);
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}
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// Should not take ownership
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fn get_char(data: String) -> char {
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fn get_char(data: &String) -> char {
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data.chars().last().unwrap()
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}
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// Should take ownership
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fn string_uppercase(mut data: &String) {
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data = &data.to_uppercase();
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fn string_uppercase(mut data: String) {
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data = data.to_uppercase();
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println!("{}", data);
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}
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@ -2,13 +2,13 @@
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// Address all the TODOs to make the tests pass!
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// Execute `rustlings hint structs1` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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struct ColorClassicStruct {
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// TODO: Something goes here
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red: u32,
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green: u32,
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blue: u32,
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}
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struct ColorTupleStruct(/* TODO: Something goes here */);
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struct ColorTupleStruct(u32, u32, u32);
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#[derive(Debug)]
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struct UnitLikeStruct;
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#[test]
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fn classic_c_structs() {
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// TODO: Instantiate a classic c struct!
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// let green =
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let green = ColorClassicStruct {
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red: 0,
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green: 255,
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blue: 0,
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};
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assert_eq!(green.red, 0);
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assert_eq!(green.green, 255);
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#[test]
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fn tuple_structs() {
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// TODO: Instantiate a tuple struct!
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// let green =
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let green = ColorTupleStruct(0, 255, 0);
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assert_eq!(green.0, 0);
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assert_eq!(green.1, 255);
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#[test]
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fn unit_structs() {
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// TODO: Instantiate a unit-like struct!
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// let unit_like_struct =
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let unit_like_struct = UnitLikeStruct;
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let message = format!("{:?}s are fun!", unit_like_struct);
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assert_eq!(message, "UnitLikeStructs are fun!");
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@ -2,8 +2,6 @@
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// Address all the TODOs to make the tests pass!
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// Execute `rustlings hint structs2` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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#[derive(Debug)]
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struct Order {
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name: String,
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#[test]
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fn your_order() {
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let order_template = create_order_template();
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// TODO: Create your own order using the update syntax and template above!
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// let your_order =
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let your_order = Order {
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name: String::from("Hacker in Rust"),
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count: 1,
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..order_template
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};
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assert_eq!(your_order.name, "Hacker in Rust");
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assert_eq!(your_order.year, order_template.year);
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assert_eq!(your_order.made_by_phone, order_template.made_by_phone);
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// Make me compile and pass the test!
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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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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 = a.to_vec();
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// let v = vec![10, 20, 30, 40];
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(a, v)
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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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// I AM NOT DONE
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fn vec_loop(mut v: Vec<i32>) -> Vec<i32> {
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for i 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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// multiplied by 2.
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???
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*i *= 2
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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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fn vec_map(v: &Vec<i32>) -> Vec<i32> {
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v.iter().map(|num| {
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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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???
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num * 2
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}).collect()
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}
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