Original exercises
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1acbbb6d43
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278a1f103b
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@ -1,10 +1,8 @@
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// functions1.rs
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// Execute `rustlings hint functions1` 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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call_me();
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}
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fn call_me() {
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println!("I'm Nidhal Messaoudi, a software developer going Rusty!!!");
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}
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@ -1,11 +1,13 @@
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// functions2.rs
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// Execute `rustlings hint functions2` 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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call_me(3);
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}
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fn call_me(num: i32) {
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fn call_me(num:) {
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for i in 0..num {
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println!("Ring! Call number {}", i + 1);
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}
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@ -1,8 +1,10 @@
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// functions3.rs
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// Execute `rustlings hint functions3` 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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call_me(12);
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call_me();
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}
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fn call_me(num: u32) {
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@ -7,12 +7,14 @@
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// in the signatures for now. If anything, this is a good way to peek ahead
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// to future exercises!)
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// I AM NOT DONE
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fn main() {
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let original_price = 51;
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println!("Your sale price is {}", sale_price(original_price));
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}
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fn sale_price(price: i32) -> i32 {
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fn sale_price(price: i32) -> {
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if is_even(price) {
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price - 10
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} else {
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@ -1,11 +1,13 @@
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// functions5.rs
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// Execute `rustlings hint functions5` 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 answer = square(3);
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println!("The square of 3 is {}", answer);
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}
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fn square(num: i32) -> i32 {
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return num * num;
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num * num;
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}
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@ -1,16 +1,13 @@
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// if1.rs
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// Execute `rustlings hint if1` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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pub fn bigger(a: i32, b: i32) -> i32 {
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// Complete this function to return the bigger number!
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// Do not use:
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// - another function call
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// - additional variables
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if a > b {
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a
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} else {
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b
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}
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}
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// Don't mind this for now :)
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@ -4,13 +4,13 @@
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// Step 2: Get the bar_for_fuzz and default_to_baz tests passing!
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// Execute `rustlings hint if2` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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pub fn foo_if_fizz(fizzish: &str) -> &str {
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if fizzish == "fuzz" {
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"bar"
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} else if fizzish == "fizz" {
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if fizzish == "fizz" {
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"foo"
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} else {
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"baz"
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1
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}
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}
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@ -9,6 +9,8 @@
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// when you change one of the lines below! Try adding a `println!` line, or try changing
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// what it outputs in your terminal. Try removing a semicolon and see what happens!
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// I AM NOT DONE
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fn main() {
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println!("Hello and");
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println!(r#" welcome to... "#);
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@ -2,6 +2,8 @@
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// Make the code print a greeting to the world.
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// Execute `rustlings hint intro2` 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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println!("Hello {}!", "World");
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println!("Hello {}!");
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}
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@ -1,10 +1,12 @@
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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 mut vec1 = fill_vec(vec0);
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let vec1 = fill_vec(vec0);
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println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
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@ -2,10 +2,12 @@
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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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fn main() {
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let mut vec0 = Vec::new();
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// I AM NOT DONE
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let mut vec1 = fill_vec(&mut vec0);
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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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// Do not change the following line!
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println!("{} has length {} content `{:?}`", "vec0", vec0.len(), vec0);
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println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
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}
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fn fill_vec(vec: &mut Vec<i32>) -> Vec<i32> {
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fn fill_vec(vec: Vec<i32>) -> Vec<i32> {
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let mut vec = vec;
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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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vec.to_vec()
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vec
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}
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@ -3,6 +3,8 @@
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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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println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
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}
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fn fill_vec(mut vec: Vec<i32>) -> Vec<i32> {
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fn fill_vec(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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@ -2,6 +2,8 @@
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// Fill in the rest of the line that has code missing!
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// No hints, there's no tricks, just get used to typing these :)
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// I AM NOT DONE
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fn main() {
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// Booleans (`bool`)
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println!("Good morning!");
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}
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let is_evening = false; // Finish the rest of this line like the example! Or make it be false!
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let // Finish the rest of this line like the example! Or make it be false!
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if is_evening {
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println!("Good evening!");
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}
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@ -2,12 +2,14 @@
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// Fill in the rest of the line that has code missing!
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// No hints, there's no tricks, just get used to typing these :)
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// I AM NOT DONE
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fn main() {
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// Characters (`char`)
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// Note the _single_ quotes, these are different from the double quotes
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// you've been seeing around.
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let my_first_initial = 'N';
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let my_first_initial = 'C';
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if my_first_initial.is_alphabetic() {
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println!("Alphabetical!");
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} else if my_first_initial.is_numeric() {
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println!("Neither alphabetic nor numeric!");
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}
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let my_favorite_character = '🔥'; // Finish this line like the example! What's your favorite character?
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let // Finish this line like the example! What's your favorite character?
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// Try a letter, try a number, try a special character, try a character
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// from a different language than your own, try an emoji!
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if my_favorite_character.is_alphabetic() {
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if your_character.is_alphabetic() {
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println!("Alphabetical!");
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} else if my_favorite_character.is_numeric() {
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} else if your_character.is_numeric() {
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println!("Numerical!");
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} else {
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println!("Neither alphabetic nor numeric!");
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// Create an array with at least 100 elements in it where the ??? is.
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// Execute `rustlings hint primitive_types3` or use the `hint` watch subcommand for a hint.
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fn main() {
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let a = ["Nidhal Messaoudi, A Rust professional!"; 100];
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// I AM NOT DONE
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println!("{}", a.len());
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fn main() {
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let a = ???
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if a.len() >= 100 {
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println!("Wow, that's a big array!");
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// Get a slice out of Array a where the ??? is so that the test passes.
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// Execute `rustlings hint primitive_types4` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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#[test]
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fn slice_out_of_array() {
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let a = [1, 2, 3, 4, 5];
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let nice_slice = &a[1..4];
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let nice_slice = ???
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assert_eq!([2, 3, 4], nice_slice)
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}
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// Destructure the `cat` tuple so that the println will work.
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// Execute `rustlings hint primitive_types5` 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 cat = ("Furry McFurson", 3.5);
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let (name, age) = cat;
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let /* your pattern here */ = cat;
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println!("{} is {} years old.", name, age);
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}
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// You can put the expression for the second element where ??? is so that the test passes.
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// Execute `rustlings hint primitive_types6` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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#[test]
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fn indexing_tuple() {
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let numbers = (1, 2, 3);
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// Replace below ??? with the tuple indexing syntax.
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let second = numbers.1;
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let second = ???;
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assert_eq!(2, second,
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"This is not the 2nd number in the tuple!")
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// Write a function that calculates the price of an order of apples given
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// the quantity bought. No hints this time!
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// Put your function here!
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fn calculate_price_of_apples(quantity: i32) -> i32 {
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let mut quantity= quantity;
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if quantity <= 40 {
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quantity = quantity * 2;
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}
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return quantity;
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// I AM NOT DONE
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// if quantity > 40 {
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// quantity
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// } else {
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// quantity * 2
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// }
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}
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// Put your function here!
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// fn calculate_price_of_apples {
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// Don't modify this function!
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#[test]
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// Make me compile!
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// Execute `rustlings hint variables1` 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 x = 5;
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x = 5;
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println!("x has the value {}", x);
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}
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// variables2.rs
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// Execute `rustlings hint variables2` 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 x = 12;
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let x;
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if x == 10 {
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println!("x is ten!");
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} else {
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// variables3.rs
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// Execute `rustlings hint variables3` 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 x: i32 = 12;
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let x: i32;
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println!("Number {}", x);
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}
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// variables4.rs
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// Execute `rustlings hint variables4` 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 = 3;
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let x = 3;
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println!("Number {}", x);
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x = 5; // don't change this line
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println!("Number {}", x);
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// variables5.rs
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// Execute `rustlings hint variables5` 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 number = "T-H-R-E-E"; // don't change this line
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println!("Spell a Number : {}", number);
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let number = 3; // don't rename this variable
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number = 3; // don't rename this variable
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println!("Number plus two is : {}", number + 2);
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}
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// variables6.rs
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// Execute `rustlings hint variables6` or use the `hint` watch subcommand for a hint.
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const NUMBER: i32 = 3;
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// I AM NOT DONE
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const NUMBER = 3;
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fn main() {
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println!("Number {}", NUMBER);
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}
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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 = vec![10, 20, 30, 40]; // TODO: declare your vector here with the macro for vectors
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let v = // TODO: declare your vector here with the macro for vectors
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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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*i *= 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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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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num * 2
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???
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}).collect()
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}
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