From 540b34d19bbfcd20ce177b0c4522c1077b665878 Mon Sep 17 00:00:00 2001 From: Jake Walker Date: Tue, 11 Oct 2022 16:50:10 +0100 Subject: [PATCH] Solutions 1 --- exercises/enums/enums1.rs | 6 +++-- exercises/enums/enums2.rs | 6 +++-- exercises/enums/enums3.rs | 12 ++++++++-- exercises/functions/functions1.rs | 5 ++++- exercises/functions/functions2.rs | 4 +--- exercises/functions/functions3.rs | 4 +--- exercises/functions/functions4.rs | 4 +--- exercises/functions/functions5.rs | 4 +--- exercises/hashmaps/hashmaps1.rs | 6 ++--- exercises/hashmaps/hashmaps2.rs | 3 +-- exercises/hashmaps/hashmaps3.rs | 18 +++++++++++++-- exercises/if/if1.rs | 7 ++++-- exercises/if/if2.rs | 6 ++--- exercises/intro/intro1.rs | 4 ++-- exercises/intro/intro2.rs | 4 +--- exercises/modules/modules1.rs | 4 +--- exercises/modules/modules2.rs | 6 ++--- exercises/modules/modules3.rs | 4 +--- exercises/move_semantics/move_semantics1.rs | 4 +--- exercises/move_semantics/move_semantics2.rs | 4 +--- exercises/move_semantics/move_semantics3.rs | 4 +--- exercises/move_semantics/move_semantics4.rs | 8 ++----- exercises/move_semantics/move_semantics5.rs | 4 +--- exercises/move_semantics/move_semantics6.rs | 12 +++++----- exercises/primitive_types/primitive_types1.rs | 4 +--- exercises/primitive_types/primitive_types2.rs | 4 +--- exercises/primitive_types/primitive_types3.rs | 4 +--- exercises/primitive_types/primitive_types4.rs | 4 +--- exercises/primitive_types/primitive_types5.rs | 4 +--- exercises/primitive_types/primitive_types6.rs | 4 +--- exercises/quiz1.rs | 10 ++++++--- exercises/quiz2.rs | 16 +++++++++----- exercises/strings/strings1.rs | 4 +--- exercises/strings/strings2.rs | 4 +--- exercises/strings/strings3.rs | 8 +++---- exercises/strings/strings4.rs | 22 +++++++++---------- exercises/structs/structs1.rs | 14 ++++++------ exercises/structs/structs2.rs | 8 ++++--- exercises/structs/structs3.rs | 10 ++++----- exercises/variables/variables1.rs | 4 +--- exercises/variables/variables2.rs | 3 +-- exercises/variables/variables3.rs | 3 +-- exercises/variables/variables4.rs | 4 +--- exercises/variables/variables5.rs | 4 +--- exercises/variables/variables6.rs | 4 +--- exercises/vecs/vecs1.rs | 4 +--- exercises/vecs/vecs2.rs | 6 ++--- 47 files changed, 135 insertions(+), 160 deletions(-) diff --git a/exercises/enums/enums1.rs b/exercises/enums/enums1.rs index 511ba74..eb718a7 100644 --- a/exercises/enums/enums1.rs +++ b/exercises/enums/enums1.rs @@ -1,11 +1,13 @@ // enums1.rs // No hints this time! ;) -// I AM NOT DONE - #[derive(Debug)] enum Message { // TODO: define a few types of messages as used below + Quit, + Echo, + Move, + ChangeColor, } fn main() { diff --git a/exercises/enums/enums2.rs b/exercises/enums/enums2.rs index 18479f8..134742f 100644 --- a/exercises/enums/enums2.rs +++ b/exercises/enums/enums2.rs @@ -1,11 +1,13 @@ // enums2.rs // Execute `rustlings hint enums2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - #[derive(Debug)] enum Message { // TODO: define the different variants used below + Move { x: u8, y: u8 }, + Echo(String), + ChangeColor(u8, u8, u8), + Quit } impl Message { diff --git a/exercises/enums/enums3.rs b/exercises/enums/enums3.rs index 55acf6b..7105b9d 100644 --- a/exercises/enums/enums3.rs +++ b/exercises/enums/enums3.rs @@ -2,10 +2,12 @@ // Address all the TODOs to make the tests pass! // Execute `rustlings hint enums3` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - enum Message { // TODO: implement the message variant types based on their usage below + ChangeColor((u8, u8, u8)), + Echo(String), + Move(Point), + Quit, } struct Point { @@ -38,6 +40,12 @@ impl State { fn process(&mut self, message: Message) { // TODO: create a match expression to process the different message variants + match message { + Message::ChangeColor(color) => self.change_color(color), + Message::Echo(s) => self.echo(s), + Message::Move(p) => self.move_position(p), + Message::Quit => self.quit() + } } } diff --git a/exercises/functions/functions1.rs b/exercises/functions/functions1.rs index 03d8af7..e01cc91 100644 --- a/exercises/functions/functions1.rs +++ b/exercises/functions/functions1.rs @@ -1,7 +1,10 @@ // functions1.rs // Execute `rustlings hint functions1` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE + +fn call_me() { + println!("Hello"); +} fn main() { call_me(); diff --git a/exercises/functions/functions2.rs b/exercises/functions/functions2.rs index 7d40a57..5a51bdf 100644 --- a/exercises/functions/functions2.rs +++ b/exercises/functions/functions2.rs @@ -1,13 +1,11 @@ // functions2.rs // Execute `rustlings hint functions2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { call_me(3); } -fn call_me(num:) { +fn call_me(num: i32) { for i in 0..num { println!("Ring! Call number {}", i + 1); } diff --git a/exercises/functions/functions3.rs b/exercises/functions/functions3.rs index 3b9e585..617a050 100644 --- a/exercises/functions/functions3.rs +++ b/exercises/functions/functions3.rs @@ -1,10 +1,8 @@ // functions3.rs // Execute `rustlings hint functions3` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { - call_me(); + call_me(10); } fn call_me(num: u32) { diff --git a/exercises/functions/functions4.rs b/exercises/functions/functions4.rs index 65d5be4..40677fc 100644 --- a/exercises/functions/functions4.rs +++ b/exercises/functions/functions4.rs @@ -7,14 +7,12 @@ // in the signatures for now. If anything, this is a good way to peek ahead // to future exercises!) -// I AM NOT DONE - fn main() { let original_price = 51; println!("Your sale price is {}", sale_price(original_price)); } -fn sale_price(price: i32) -> { +fn sale_price(price: i32) -> i32 { if is_even(price) { price - 10 } else { diff --git a/exercises/functions/functions5.rs b/exercises/functions/functions5.rs index 5d76296..ee8210a 100644 --- a/exercises/functions/functions5.rs +++ b/exercises/functions/functions5.rs @@ -1,13 +1,11 @@ // functions5.rs // Execute `rustlings hint functions5` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { let answer = square(3); println!("The square of 3 is {}", answer); } fn square(num: i32) -> i32 { - num * num; + num * num } diff --git a/exercises/hashmaps/hashmaps1.rs b/exercises/hashmaps/hashmaps1.rs index fd8dd2f..4d948dd 100644 --- a/exercises/hashmaps/hashmaps1.rs +++ b/exercises/hashmaps/hashmaps1.rs @@ -10,17 +10,17 @@ // // Execute `rustlings hint hashmaps1` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - use std::collections::HashMap; fn fruit_basket() -> HashMap { - let mut basket = // TODO: declare your hash map here. + let mut basket = HashMap::new(); // TODO: declare your hash map here. // Two bananas are already given for you :) basket.insert(String::from("banana"), 2); // TODO: Put more fruits in your basket here. + basket.insert(String::from("apple"), 1); + basket.insert(String::from("mango"), 2); basket } diff --git a/exercises/hashmaps/hashmaps2.rs b/exercises/hashmaps/hashmaps2.rs index 454b3e1..f96479d 100644 --- a/exercises/hashmaps/hashmaps2.rs +++ b/exercises/hashmaps/hashmaps2.rs @@ -11,8 +11,6 @@ // // Execute `rustlings hint hashmaps2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - use std::collections::HashMap; #[derive(Hash, PartialEq, Eq)] @@ -37,6 +35,7 @@ fn fruit_basket(basket: &mut HashMap) { // TODO: Put new fruits if not already present. Note that you // are not allowed to put any type of fruit that's already // present! + basket.entry(fruit).or_insert(10); } } diff --git a/exercises/hashmaps/hashmaps3.rs b/exercises/hashmaps/hashmaps3.rs index 18dd44c..01cf0fa 100644 --- a/exercises/hashmaps/hashmaps3.rs +++ b/exercises/hashmaps/hashmaps3.rs @@ -14,8 +14,6 @@ // Execute `rustlings hint hashmaps3` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - use std::collections::HashMap; // A structure to store team name and its goal details. @@ -40,6 +38,22 @@ fn build_scores_table(results: String) -> HashMap { // will be number of goals conceded from team_2, and similarly // goals scored by team_2 will be the number of goals conceded by // team_1. + + let team_1 = scores.entry(team_1_name.clone()).or_insert(Team { + name: team_1_name, + goals_scored: 0, + goals_conceded: 0 + }); + team_1.goals_scored += team_1_score; + team_1.goals_conceded += team_2_score; + + let team_2 = scores.entry(team_2_name.clone()).or_insert(Team { + name: team_2_name, + goals_scored: 0, + goals_conceded: 0 + }); + team_2.goals_scored += team_2_score; + team_2.goals_conceded += team_1_score; } scores } diff --git a/exercises/if/if1.rs b/exercises/if/if1.rs index 587e03f..660a093 100644 --- a/exercises/if/if1.rs +++ b/exercises/if/if1.rs @@ -1,13 +1,16 @@ // if1.rs // Execute `rustlings hint if1` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - pub fn bigger(a: i32, b: i32) -> i32 { // Complete this function to return the bigger number! // Do not use: // - another function call // - additional variables + if a > b { + a + } else { + b + } } // Don't mind this for now :) diff --git a/exercises/if/if2.rs b/exercises/if/if2.rs index effddbb..129a4a2 100644 --- a/exercises/if/if2.rs +++ b/exercises/if/if2.rs @@ -4,13 +4,13 @@ // Step 2: Get the bar_for_fuzz and default_to_baz tests passing! // Execute `rustlings hint if2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - pub fn foo_if_fizz(fizzish: &str) -> &str { if fizzish == "fizz" { "foo" + } else if fizzish == "fuzz" { + "bar" } else { - 1 + "baz" } } diff --git a/exercises/intro/intro1.rs b/exercises/intro/intro1.rs index 45c5acb..28720f9 100644 --- a/exercises/intro/intro1.rs +++ b/exercises/intro/intro1.rs @@ -9,8 +9,6 @@ // when you change one of the lines below! Try adding a `println!` line, or try changing // what it outputs in your terminal. Try removing a semicolon and see what happens! -// I AM NOT DONE - fn main() { println!("Hello and"); println!(r#" welcome to... "#); @@ -27,4 +25,6 @@ fn main() { println!(); println!("The source for this exercise is in `exercises/intro/intro1.rs`. Have a look!"); println!("Going forward, the source of the exercises will always be in the success/failure output."); + + println!("Hello World!"); } diff --git a/exercises/intro/intro2.rs b/exercises/intro/intro2.rs index efc1af2..b5b1d0a 100644 --- a/exercises/intro/intro2.rs +++ b/exercises/intro/intro2.rs @@ -2,8 +2,6 @@ // Make the code print a greeting to the world. // Execute `rustlings hint intro2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { - println!("Hello {}!"); + println!("Hello {}!", "World"); } diff --git a/exercises/modules/modules1.rs b/exercises/modules/modules1.rs index 8dd0e40..09d5ab3 100644 --- a/exercises/modules/modules1.rs +++ b/exercises/modules/modules1.rs @@ -1,15 +1,13 @@ // modules1.rs // Execute `rustlings hint modules1` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - mod sausage_factory { // Don't let anybody outside of this module see this! fn get_secret_recipe() -> String { String::from("Ginger") } - fn make_sausage() { + pub fn make_sausage() { get_secret_recipe(); println!("sausage!"); } diff --git a/exercises/modules/modules2.rs b/exercises/modules/modules2.rs index c30a389..65ea5a8 100644 --- a/exercises/modules/modules2.rs +++ b/exercises/modules/modules2.rs @@ -3,12 +3,10 @@ // 'use' and 'as' keywords. Fix these 'use' statements to make the code compile. // Execute `rustlings hint modules2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - mod delicious_snacks { // TODO: Fix these use statements - use self::fruits::PEAR as ??? - use self::veggies::CUCUMBER as ??? + pub use self::fruits::PEAR as fruit; + pub use self::veggies::CUCUMBER as veggie; mod fruits { pub const PEAR: &'static str = "Pear"; diff --git a/exercises/modules/modules3.rs b/exercises/modules/modules3.rs index 35e0799..0d0264c 100644 --- a/exercises/modules/modules3.rs +++ b/exercises/modules/modules3.rs @@ -5,10 +5,8 @@ // from the std::time module. Bonus style points if you can do it with one line! // Execute `rustlings hint modules3` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - // TODO: Complete this use statement -use ??? +use std::time::{SystemTime, UNIX_EPOCH}; fn main() { match SystemTime::now().duration_since(UNIX_EPOCH) { diff --git a/exercises/move_semantics/move_semantics1.rs b/exercises/move_semantics/move_semantics1.rs index aac6dfc..c60ee74 100644 --- a/exercises/move_semantics/move_semantics1.rs +++ b/exercises/move_semantics/move_semantics1.rs @@ -1,12 +1,10 @@ // move_semantics1.rs // Execute `rustlings hint move_semantics1` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { let vec0 = Vec::new(); - let vec1 = fill_vec(vec0); + let mut vec1 = fill_vec(vec0); println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1); diff --git a/exercises/move_semantics/move_semantics2.rs b/exercises/move_semantics/move_semantics2.rs index 6487085..8825a87 100644 --- a/exercises/move_semantics/move_semantics2.rs +++ b/exercises/move_semantics/move_semantics2.rs @@ -2,12 +2,10 @@ // Make me compile without changing line 13 or moving line 10! // Execute `rustlings hint move_semantics2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { let vec0 = Vec::new(); - let mut vec1 = fill_vec(vec0); + let mut vec1 = fill_vec(vec0.clone()); // Do not change the following line! println!("{} has length {} content `{:?}`", "vec0", vec0.len(), vec0); diff --git a/exercises/move_semantics/move_semantics3.rs b/exercises/move_semantics/move_semantics3.rs index eaa30e3..bb83023 100644 --- a/exercises/move_semantics/move_semantics3.rs +++ b/exercises/move_semantics/move_semantics3.rs @@ -3,8 +3,6 @@ // (no lines with multiple semicolons necessary!) // Execute `rustlings hint move_semantics3` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { let vec0 = Vec::new(); @@ -17,7 +15,7 @@ fn main() { println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1); } -fn fill_vec(vec: Vec) -> Vec { +fn fill_vec(mut vec: Vec) -> Vec { vec.push(22); vec.push(44); vec.push(66); diff --git a/exercises/move_semantics/move_semantics4.rs b/exercises/move_semantics/move_semantics4.rs index 99834ec..2107761 100644 --- a/exercises/move_semantics/move_semantics4.rs +++ b/exercises/move_semantics/move_semantics4.rs @@ -4,12 +4,8 @@ // function. // Execute `rustlings hint move_semantics4` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { - let vec0 = Vec::new(); - - let mut vec1 = fill_vec(vec0); + let mut vec1 = fill_vec(); println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1); @@ -20,7 +16,7 @@ fn main() { // `fill_vec()` no longer takes `vec: Vec` as argument fn fill_vec() -> Vec { - let mut vec = vec; + let mut vec = Vec::new(); vec.push(22); vec.push(44); diff --git a/exercises/move_semantics/move_semantics5.rs b/exercises/move_semantics/move_semantics5.rs index 36eae12..ab04f4c 100644 --- a/exercises/move_semantics/move_semantics5.rs +++ b/exercises/move_semantics/move_semantics5.rs @@ -3,13 +3,11 @@ // adding, changing or removing any of them. // Execute `rustlings hint move_semantics5` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { let mut x = 100; let y = &mut x; - let z = &mut x; *y += 100; + let z = &mut x; *z += 1000; assert_eq!(x, 1200); } diff --git a/exercises/move_semantics/move_semantics6.rs b/exercises/move_semantics/move_semantics6.rs index eb52a84..055ea5b 100644 --- a/exercises/move_semantics/move_semantics6.rs +++ b/exercises/move_semantics/move_semantics6.rs @@ -2,24 +2,22 @@ // Execute `rustlings hint move_semantics6` or use the `hint` watch subcommand for a hint. // You can't change anything except adding or removing references. -// I AM NOT DONE - fn main() { let data = "Rust is great!".to_string(); - get_char(data); + get_char(&data); - string_uppercase(&data); + string_uppercase(data); } // Should not take ownership -fn get_char(data: String) -> char { +fn get_char(data: &String) -> char { data.chars().last().unwrap() } // Should take ownership -fn string_uppercase(mut data: &String) { - data = &data.to_uppercase(); +fn string_uppercase(mut data: String) { + data = data.to_uppercase(); println!("{}", data); } diff --git a/exercises/primitive_types/primitive_types1.rs b/exercises/primitive_types/primitive_types1.rs index 0912139..91734c6 100644 --- a/exercises/primitive_types/primitive_types1.rs +++ b/exercises/primitive_types/primitive_types1.rs @@ -2,8 +2,6 @@ // Fill in the rest of the line that has code missing! // No hints, there's no tricks, just get used to typing these :) -// I AM NOT DONE - fn main() { // Booleans (`bool`) @@ -12,7 +10,7 @@ fn main() { println!("Good morning!"); } - let // Finish the rest of this line like the example! Or make it be false! + let is_evening = false; // Finish the rest of this line like the example! Or make it be false! if is_evening { println!("Good evening!"); } diff --git a/exercises/primitive_types/primitive_types2.rs b/exercises/primitive_types/primitive_types2.rs index 8730baa..fb40cb3 100644 --- a/exercises/primitive_types/primitive_types2.rs +++ b/exercises/primitive_types/primitive_types2.rs @@ -2,8 +2,6 @@ // Fill in the rest of the line that has code missing! // No hints, there's no tricks, just get used to typing these :) -// I AM NOT DONE - fn main() { // Characters (`char`) @@ -18,7 +16,7 @@ fn main() { println!("Neither alphabetic nor numeric!"); } - let // Finish this line like the example! What's your favorite character? + let your_character = '🤝'; // Finish this line like the example! What's your favorite character? // Try a letter, try a number, try a special character, try a character // from a different language than your own, try an emoji! if your_character.is_alphabetic() { diff --git a/exercises/primitive_types/primitive_types3.rs b/exercises/primitive_types/primitive_types3.rs index fa7d019..8f41306 100644 --- a/exercises/primitive_types/primitive_types3.rs +++ b/exercises/primitive_types/primitive_types3.rs @@ -2,10 +2,8 @@ // Create an array with at least 100 elements in it where the ??? is. // Execute `rustlings hint primitive_types3` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { - let a = ??? + let a = ["Hello World"; 100]; if a.len() >= 100 { println!("Wow, that's a big array!"); diff --git a/exercises/primitive_types/primitive_types4.rs b/exercises/primitive_types/primitive_types4.rs index 71fa243..e337178 100644 --- a/exercises/primitive_types/primitive_types4.rs +++ b/exercises/primitive_types/primitive_types4.rs @@ -2,13 +2,11 @@ // Get a slice out of Array a where the ??? is so that the test passes. // Execute `rustlings hint primitive_types4` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - #[test] fn slice_out_of_array() { let a = [1, 2, 3, 4, 5]; - let nice_slice = ??? + let nice_slice = &a[1..4]; assert_eq!([2, 3, 4], nice_slice) } diff --git a/exercises/primitive_types/primitive_types5.rs b/exercises/primitive_types/primitive_types5.rs index 4fd9141..5cba3c1 100644 --- a/exercises/primitive_types/primitive_types5.rs +++ b/exercises/primitive_types/primitive_types5.rs @@ -2,11 +2,9 @@ // Destructure the `cat` tuple so that the println will work. // Execute `rustlings hint primitive_types5` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { let cat = ("Furry McFurson", 3.5); - let /* your pattern here */ = cat; + let (name, age) = cat; println!("{} is {} years old.", name, age); } diff --git a/exercises/primitive_types/primitive_types6.rs b/exercises/primitive_types/primitive_types6.rs index ddf8b42..695d281 100644 --- a/exercises/primitive_types/primitive_types6.rs +++ b/exercises/primitive_types/primitive_types6.rs @@ -3,13 +3,11 @@ // You can put the expression for the second element where ??? is so that the test passes. // Execute `rustlings hint primitive_types6` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - #[test] fn indexing_tuple() { let numbers = (1, 2, 3); // Replace below ??? with the tuple indexing syntax. - let second = ???; + let second = numbers.1; assert_eq!(2, second, "This is not the 2nd number in the tuple!") diff --git a/exercises/quiz1.rs b/exercises/quiz1.rs index dbb5cdc..6c4726c 100644 --- a/exercises/quiz1.rs +++ b/exercises/quiz1.rs @@ -10,10 +10,14 @@ // Write a function that calculates the price of an order of apples given // the quantity bought. No hints this time! -// I AM NOT DONE - // Put your function here! -// fn calculate_price_of_apples { +fn calculate_price_of_apples(qty: i32) -> i32 { + if qty > 40 { + qty + } else { + qty * 2 + } +} // Don't modify this function! #[test] diff --git a/exercises/quiz2.rs b/exercises/quiz2.rs index d8fa954..77c59c2 100644 --- a/exercises/quiz2.rs +++ b/exercises/quiz2.rs @@ -18,8 +18,6 @@ // - The output element is going to be a Vector of strings. // Execute `rustlings hint quiz2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - pub enum Command { Uppercase, Trim, @@ -30,11 +28,17 @@ mod my_module { use super::Command; // TODO: Complete the function signature! - pub fn transformer(input: ???) -> ??? { + pub fn transformer(input: Vec<(String, Command)>) -> Vec { // TODO: Complete the output declaration! - let mut output: ??? = vec![]; + let mut output: Vec = vec![]; for (string, command) in input.iter() { - // TODO: Complete the function body. You can do it! + output.push( + match command { + Command::Uppercase => string.to_uppercase(), + Command::Trim => string.trim().to_string(), + Command::Append(n) => format!("{}{}", string, "bar".repeat(*n)) + } + ) } output } @@ -43,7 +47,7 @@ mod my_module { #[cfg(test)] mod tests { // TODO: What do we have to import to have `transformer` in scope? - use ???; + use my_module::transformer; use super::Command; #[test] diff --git a/exercises/strings/strings1.rs b/exercises/strings/strings1.rs index 0de86a1..1211c9e 100644 --- a/exercises/strings/strings1.rs +++ b/exercises/strings/strings1.rs @@ -2,13 +2,11 @@ // Make me compile without changing the function signature! // Execute `rustlings hint strings1` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { let answer = current_favorite_color(); println!("My current favorite color is {}", answer); } fn current_favorite_color() -> String { - "blue" + String::from("blue") } diff --git a/exercises/strings/strings2.rs b/exercises/strings/strings2.rs index 0c48ec9..22e8986 100644 --- a/exercises/strings/strings2.rs +++ b/exercises/strings/strings2.rs @@ -2,11 +2,9 @@ // Make me compile without changing the function signature! // Execute `rustlings hint strings2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { let word = String::from("green"); // Try not changing this line :) - if is_a_color_word(word) { + if is_a_color_word(&word) { println!("That is a color word I know!"); } else { println!("That is not a color word I know."); diff --git a/exercises/strings/strings3.rs b/exercises/strings/strings3.rs index e2353ae..9658c18 100644 --- a/exercises/strings/strings3.rs +++ b/exercises/strings/strings3.rs @@ -1,21 +1,19 @@ // strings3.rs // Execute `rustlings hint strings3` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn trim_me(input: &str) -> String { // TODO: Remove whitespace from both ends of a string! - ??? + (&input.trim()).to_string() } fn compose_me(input: &str) -> String { // TODO: Add " world!" to the string! There's multiple ways to do this! - ??? + format!("{} world!", input) } fn replace_me(input: &str) -> String { // TODO: Replace "cars" in the string with "balloons"! - ??? + input.replace("cars", "balloons") } #[cfg(test)] diff --git a/exercises/strings/strings4.rs b/exercises/strings/strings4.rs index c410b56..0205f9c 100644 --- a/exercises/strings/strings4.rs +++ b/exercises/strings/strings4.rs @@ -6,8 +6,6 @@ // before the parentheses on each line. If you're right, it will compile! // No hints this time! -// I AM NOT DONE - fn string_slice(arg: &str) { println!("{}", arg); } @@ -16,14 +14,14 @@ fn string(arg: String) { } fn main() { - ???("blue"); - ???("red".to_string()); - ???(String::from("hi")); - ???("rust is fun!".to_owned()); - ???("nice weather".into()); - ???(format!("Interpolation {}", "Station")); - ???(&String::from("abc")[0..1]); - ???(" hello there ".trim()); - ???("Happy Monday!".to_string().replace("Mon", "Tues")); - ???("mY sHiFt KeY iS sTiCkY".to_lowercase()); + string_slice("blue"); + string("red".to_string()); + string(String::from("hi")); + string("rust is fun!".to_owned()); + string("nice weather".into()); + string(format!("Interpolation {}", "Station")); + string_slice(&String::from("abc")[0..1]); + string_slice(" hello there ".trim()); + string("Happy Monday!".to_string().replace("Mon", "Tues")); + string("mY sHiFt KeY iS sTiCkY".to_lowercase()); } diff --git a/exercises/structs/structs1.rs b/exercises/structs/structs1.rs index 0d91c46..4ddbf41 100644 --- a/exercises/structs/structs1.rs +++ b/exercises/structs/structs1.rs @@ -2,13 +2,13 @@ // Address all the TODOs to make the tests pass! // Execute `rustlings hint structs1` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - struct ColorClassicStruct { - // TODO: Something goes here + red: u8, + green: u8, + blue: u8, } -struct ColorTupleStruct(/* TODO: Something goes here */); +struct ColorTupleStruct(u8, u8, u8); #[derive(Debug)] struct UnitLikeStruct; @@ -20,7 +20,7 @@ mod tests { #[test] fn classic_c_structs() { // TODO: Instantiate a classic c struct! - // let green = + let green = ColorClassicStruct { red: 0, green: 255, blue: 0 }; assert_eq!(green.red, 0); assert_eq!(green.green, 255); @@ -30,7 +30,7 @@ mod tests { #[test] fn tuple_structs() { // TODO: Instantiate a tuple struct! - // let green = + let green = ColorTupleStruct(0, 255, 0); assert_eq!(green.0, 0); assert_eq!(green.1, 255); @@ -40,7 +40,7 @@ mod tests { #[test] fn unit_structs() { // TODO: Instantiate a unit-like struct! - // let unit_like_struct = + let unit_like_struct = UnitLikeStruct; let message = format!("{:?}s are fun!", unit_like_struct); assert_eq!(message, "UnitLikeStructs are fun!"); diff --git a/exercises/structs/structs2.rs b/exercises/structs/structs2.rs index 32e311f..7cb860a 100644 --- a/exercises/structs/structs2.rs +++ b/exercises/structs/structs2.rs @@ -2,8 +2,6 @@ // Address all the TODOs to make the tests pass! // Execute `rustlings hint structs2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - #[derive(Debug)] struct Order { name: String, @@ -35,7 +33,11 @@ mod tests { fn your_order() { let order_template = create_order_template(); // TODO: Create your own order using the update syntax and template above! - // let your_order = + let your_order = Order { + name: String::from("Hacker in Rust"), + count: 1, + ..order_template + }; assert_eq!(your_order.name, "Hacker in Rust"); assert_eq!(your_order.year, order_template.year); assert_eq!(your_order.made_by_phone, order_template.made_by_phone); diff --git a/exercises/structs/structs3.rs b/exercises/structs/structs3.rs index 0b3615f..0177e5a 100644 --- a/exercises/structs/structs3.rs +++ b/exercises/structs/structs3.rs @@ -4,8 +4,6 @@ // Make the code compile and the tests pass! // Execute `rustlings hint structs3` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - #[derive(Debug)] struct Package { sender_country: String, @@ -26,12 +24,12 @@ impl Package { } } - fn is_international(&self) -> ??? { - // Something goes here... + fn is_international(&self) -> bool { + self.sender_country != self.recipient_country } - fn get_fees(&self, cents_per_gram: i32) -> ??? { - // Something goes here... + fn get_fees(&self, cents_per_gram: i32) -> i32 { + self.weight_in_grams * cents_per_gram } } diff --git a/exercises/variables/variables1.rs b/exercises/variables/variables1.rs index f4d182a..84de9fd 100644 --- a/exercises/variables/variables1.rs +++ b/exercises/variables/variables1.rs @@ -2,9 +2,7 @@ // Make me compile! // Execute `rustlings hint variables1` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { - x = 5; + let x = 5; println!("x has the value {}", x); } diff --git a/exercises/variables/variables2.rs b/exercises/variables/variables2.rs index 641aeb8..356900b 100644 --- a/exercises/variables/variables2.rs +++ b/exercises/variables/variables2.rs @@ -1,10 +1,9 @@ // variables2.rs // Execute `rustlings hint variables2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE fn main() { - let x; + let x: i32 = 10; if x == 10 { println!("x is ten!"); } else { diff --git a/exercises/variables/variables3.rs b/exercises/variables/variables3.rs index 819b1bc..740f889 100644 --- a/exercises/variables/variables3.rs +++ b/exercises/variables/variables3.rs @@ -1,9 +1,8 @@ // variables3.rs // Execute `rustlings hint variables3` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { let x: i32; + x = 12; println!("Number {}", x); } diff --git a/exercises/variables/variables4.rs b/exercises/variables/variables4.rs index 54491b0..8c2ddd6 100644 --- a/exercises/variables/variables4.rs +++ b/exercises/variables/variables4.rs @@ -1,10 +1,8 @@ // variables4.rs // Execute `rustlings hint variables4` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { - let x = 3; + let mut x = 3; println!("Number {}", x); x = 5; // don't change this line println!("Number {}", x); diff --git a/exercises/variables/variables5.rs b/exercises/variables/variables5.rs index 0e670d2..1b9d9f4 100644 --- a/exercises/variables/variables5.rs +++ b/exercises/variables/variables5.rs @@ -1,11 +1,9 @@ // variables5.rs // Execute `rustlings hint variables5` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { let number = "T-H-R-E-E"; // don't change this line println!("Spell a Number : {}", number); - number = 3; // don't rename this variable + let number = 3; // don't rename this variable println!("Number plus two is : {}", number + 2); } diff --git a/exercises/variables/variables6.rs b/exercises/variables/variables6.rs index a852012..e8314b2 100644 --- a/exercises/variables/variables6.rs +++ b/exercises/variables/variables6.rs @@ -1,9 +1,7 @@ // variables6.rs // Execute `rustlings hint variables6` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - -const NUMBER = 3; +const NUMBER: i32 = 3; fn main() { println!("Number {}", NUMBER); } diff --git a/exercises/vecs/vecs1.rs b/exercises/vecs/vecs1.rs index 4e8c4cb..0e8e2f7 100644 --- a/exercises/vecs/vecs1.rs +++ b/exercises/vecs/vecs1.rs @@ -4,11 +4,9 @@ // Make me compile and pass the test! // Execute `rustlings hint vecs1` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn array_and_vec() -> ([i32; 4], Vec) { let a = [10, 20, 30, 40]; // a plain array - let v = // TODO: declare your vector here with the macro for vectors + let v = vec![10, 20, 30, 40]; // TODO: declare your vector here with the macro for vectors (a, v) } diff --git a/exercises/vecs/vecs2.rs b/exercises/vecs/vecs2.rs index 5bea09a..60bdbe4 100644 --- a/exercises/vecs/vecs2.rs +++ b/exercises/vecs/vecs2.rs @@ -6,13 +6,11 @@ // // Execute `rustlings hint vecs2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn vec_loop(mut v: Vec) -> Vec { for i in v.iter_mut() { // TODO: Fill this up so that each element in the Vec `v` is // multiplied by 2. - ??? + *i = *i * 2 } // At this point, `v` should be equal to [4, 8, 12, 16, 20]. @@ -23,7 +21,7 @@ fn vec_map(v: &Vec) -> Vec { v.iter().map(|num| { // TODO: Do the same thing as above - but instead of mutating the // Vec, you can just return the new number! - ??? + num * 2 }).collect() }