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...

22 Commits

Author SHA1 Message Date
David E. Perez Negron R. 06c8a197fa half iters done 2024-11-08 21:19:57 -06:00
David E. Perez Negron R. 3db6c0baf4 tests done 2024-07-03 00:06:56 -06:00
David E. Perez Negron R. 1e91ec6f03 lifetimes done 2024-07-03 00:06:40 -06:00
David E. Perez Negron R. ec8aefc4b9 quiz3 done 2024-05-12 21:30:09 -06:00
David E. Perez Negron R. 0ac5f3a1e3 traits done 2024-05-11 11:44:39 -06:00
David E. Perez Negron R. 5a374a4588 generics done 2024-04-26 18:53:07 -06:00
David E. Perez Negron R. bfe2e1d8f0 error_handling done 2024-04-26 00:18:06 -06:00
David E. Perez Negron R. 4f31cb6daf Adding options 2023-11-21 20:00:03 -06:00
David E. Perez Negron R. a7ac566467 quiz2 done 2023-11-11 00:58:34 -06:00
David E. Perez Negron R. 4af39ccfde hashmaps done 2023-11-04 13:03:25 -06:00
David E. Perez Negron R. 224044b2f3 modules done 2023-11-04 13:03:09 -06:00
David E. Perez Negron R. bec1d3215d strings done 2023-11-03 01:48:09 -06:00
David E. Perez Negron R. da76123b1f enums done 2023-11-03 01:10:06 -06:00
David E. Perez Negron R. 6fad289cb4 structs done 2023-11-02 01:51:11 -06:00
David E. Perez Negron R. b01f35fed6 move_semantics done 2023-11-01 23:35:19 -06:00
David E. Perez Negron R. de06209a13 vecs done 2023-11-01 02:44:37 -06:00
David E. Perez Negron R. f1dff8d3f4 primitive_types done 2023-10-28 22:41:01 -06:00
David E. Perez Negron R. 470ac5a55e quiz1 done 2023-10-25 21:13:59 -06:00
David E. Perez Negron R. 88d3945451 ifs done 2023-10-25 21:13:41 -06:00
David E. Perez Negron R. 9c58757b42 functions done 2023-10-25 19:55:59 -06:00
David E. Perez Negron R. 42fbe4e178 variables done 2023-10-25 19:55:37 -06:00
David E. Perez Negron R. 44e5c34afc intro done 2023-10-25 19:55:12 -06:00
75 changed files with 241 additions and 201 deletions

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@ -2,11 +2,13 @@
// //
// No hints this time! ;) // No hints this time! ;)
// I AM NOT DONE
#[derive(Debug)] #[derive(Debug)]
enum Message { enum Message {
// TODO: define a few types of messages as used below Quit,
Echo,
Move,
ChangeColor
} }
fn main() { fn main() {

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@ -3,11 +3,13 @@
// Execute `rustlings hint enums2` or use the `hint` watch subcommand for a // Execute `rustlings hint enums2` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
#[derive(Debug)] #[derive(Debug)]
enum Message { enum Message {
// TODO: define the different variants used below Move { x: i32, y: i32},
Echo(String),
ChangeColor(i32, i32, i32),
Quit
} }
impl Message { impl Message {

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@ -5,10 +5,12 @@
// Execute `rustlings hint enums3` or use the `hint` watch subcommand for a // Execute `rustlings hint enums3` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
enum Message { enum Message {
// TODO: implement the message variant types based on their usage below Move(Point),
Echo(String),
ChangeColor(u8, u8, u8),
Quit
} }
struct Point { struct Point {
@ -45,6 +47,12 @@ impl State {
// variants // variants
// Remember: When passing a tuple as a function argument, you'll need // Remember: When passing a tuple as a function argument, you'll need
// extra parentheses: fn function((t, u, p, l, e)) // extra parentheses: fn function((t, u, p, l, e))
match message {
Message::Move(point) => self.move_position(point),
Message::Echo(echo) => self.echo(echo),
Message::ChangeColor(red, green, blue) => self.change_color((red,green,blue)),
Message::Quit => self.quit(),
}
} }
} }

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@ -9,14 +9,12 @@
// Execute `rustlings hint errors1` or use the `hint` watch subcommand for a // Execute `rustlings hint errors1` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
pub fn generate_nametag_text(name: String) -> Option<String> { pub fn generate_nametag_text(name: String) -> Result<String, String> {
if name.is_empty() { if name.is_empty() {
// Empty names aren't allowed. Err(format!("`name` was empty; it must be nonempty."))
None
} else { } else {
Some(format!("Hi! My name is {}", name)) Ok(format!("Hi! My name is {}", name))
} }
} }

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@ -19,14 +19,13 @@
// Execute `rustlings hint errors2` or use the `hint` watch subcommand for a // Execute `rustlings hint errors2` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
use std::num::ParseIntError; use std::num::ParseIntError;
pub fn total_cost(item_quantity: &str) -> Result<i32, ParseIntError> { pub fn total_cost(item_quantity: &str) -> Result<i32, ParseIntError> {
let processing_fee = 1; let processing_fee = 1;
let cost_per_item = 5; let cost_per_item = 5;
let qty = item_quantity.parse::<i32>(); let qty = item_quantity.parse::<i32>()?;
Ok(qty * cost_per_item + processing_fee) Ok(qty * cost_per_item + processing_fee)
} }

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@ -7,7 +7,6 @@
// Execute `rustlings hint errors3` or use the `hint` watch subcommand for a // Execute `rustlings hint errors3` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
use std::num::ParseIntError; use std::num::ParseIntError;
@ -15,7 +14,7 @@ fn main() {
let mut tokens = 100; let mut tokens = 100;
let pretend_user_input = "8"; let pretend_user_input = "8";
let cost = total_cost(pretend_user_input)?; let cost = total_cost(pretend_user_input).expect("Parse Int Error");
if cost > tokens { if cost > tokens {
println!("You can't afford that many!"); println!("You can't afford that many!");

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@ -3,7 +3,6 @@
// Execute `rustlings hint errors4` or use the `hint` watch subcommand for a // Execute `rustlings hint errors4` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
#[derive(PartialEq, Debug)] #[derive(PartialEq, Debug)]
struct PositiveNonzeroInteger(u64); struct PositiveNonzeroInteger(u64);
@ -16,8 +15,11 @@ enum CreationError {
impl PositiveNonzeroInteger { impl PositiveNonzeroInteger {
fn new(value: i64) -> Result<PositiveNonzeroInteger, CreationError> { fn new(value: i64) -> Result<PositiveNonzeroInteger, CreationError> {
// Hmm... Why is this always returning an Ok value? match value.signum() {
Ok(PositiveNonzeroInteger(value as u64)) -1 => Err(CreationError::Negative),
0 => Err(CreationError::Zero),
_ => Ok(PositiveNonzeroInteger(value as u64))
}
} }
} }

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@ -22,14 +22,13 @@
// Execute `rustlings hint errors5` or use the `hint` watch subcommand for a // Execute `rustlings hint errors5` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
use std::error; use std::error;
use std::fmt; use std::fmt;
use std::num::ParseIntError; use std::num::ParseIntError;
// TODO: update the return type of `main()` to make this compile. // TODO: update the return type of `main()` to make this compile.
fn main() -> Result<(), Box<dyn ???>> { fn main() -> Result<(), Box<dyn error::Error>> {
let pretend_user_input = "42"; let pretend_user_input = "42";
let x: i64 = pretend_user_input.parse()?; let x: i64 = pretend_user_input.parse()?;
println!("output={:?}", PositiveNonzeroInteger::new(x)?); println!("output={:?}", PositiveNonzeroInteger::new(x)?);

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@ -9,7 +9,6 @@
// Execute `rustlings hint errors6` or use the `hint` watch subcommand for a // Execute `rustlings hint errors6` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
use std::num::ParseIntError; use std::num::ParseIntError;
@ -26,12 +25,16 @@ impl ParsePosNonzeroError {
} }
// TODO: add another error conversion function here. // TODO: add another error conversion function here.
// fn from_parseint... // fn from_parseint...
fn from_parseint(err: ParseIntError) -> ParsePosNonzeroError {
ParsePosNonzeroError::ParseInt(err)
}
} }
fn parse_pos_nonzero(s: &str) -> Result<PositiveNonzeroInteger, ParsePosNonzeroError> { fn parse_pos_nonzero(s: &str) -> Result<PositiveNonzeroInteger, ParsePosNonzeroError> {
// TODO: change this to return an appropriate error instead of panicking // TODO: change this to return an appropriate error instead of panicking
// when `parse()` returns an error. // when `parse()` returns an error.
let x: i64 = s.parse().unwrap(); //let x: i64 = s.parse().unwrap();
let x: i64 = s.parse().map_err(ParsePosNonzeroError::from_parseint)?;
PositiveNonzeroInteger::new(x).map_err(ParsePosNonzeroError::from_creation) PositiveNonzeroInteger::new(x).map_err(ParsePosNonzeroError::from_creation)
} }

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@ -3,8 +3,9 @@
// Execute `rustlings hint functions1` or use the `hint` watch subcommand for a // Execute `rustlings hint functions1` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
call_me(); call_me();
} }
fn call_me(){}

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@ -3,13 +3,12 @@
// Execute `rustlings hint functions2` or use the `hint` watch subcommand for a // Execute `rustlings hint functions2` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
call_me(3); call_me(3);
} }
fn call_me(num:) { fn call_me(num: isize) {
for i in 0..num { for i in 0..num {
println!("Ring! Call number {}", i + 1); println!("Ring! Call number {}", i + 1);
} }

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@ -3,10 +3,9 @@
// Execute `rustlings hint functions3` or use the `hint` watch subcommand for a // Execute `rustlings hint functions3` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
call_me(); call_me(5);
} }
fn call_me(num: u32) { fn call_me(num: u32) {

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@ -8,14 +8,13 @@
// Execute `rustlings hint functions4` or use the `hint` watch subcommand for a // Execute `rustlings hint functions4` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
let original_price = 51; let original_price = 51;
println!("Your sale price is {}", sale_price(original_price)); println!("Your sale price is {}", sale_price(original_price));
} }
fn sale_price(price: i32) -> { fn sale_price(price: i32) -> i32 {
if is_even(price) { if is_even(price) {
price - 10 price - 10
} else { } else {

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@ -3,7 +3,6 @@
// Execute `rustlings hint functions5` or use the `hint` watch subcommand for a // Execute `rustlings hint functions5` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
let answer = square(3); let answer = square(3);
@ -11,5 +10,5 @@ fn main() {
} }
fn square(num: i32) -> i32 { fn square(num: i32) -> i32 {
num * num; num * num
} }

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@ -6,9 +6,8 @@
// Execute `rustlings hint generics1` or use the `hint` watch subcommand for a // Execute `rustlings hint generics1` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
let mut shopping_list: Vec<?> = Vec::new(); let mut shopping_list: Vec<&str> = Vec::new();
shopping_list.push("milk"); shopping_list.push("milk");
} }

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@ -6,14 +6,13 @@
// Execute `rustlings hint generics2` or use the `hint` watch subcommand for a // Execute `rustlings hint generics2` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
struct Wrapper { struct Wrapper<T> {
value: u32, value: T,
} }
impl Wrapper { impl<T> Wrapper<T> {
pub fn new(value: u32) -> Self { pub fn new(value: T) -> Self {
Wrapper { value } Wrapper { value }
} }
} }

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@ -11,18 +11,19 @@
// Execute `rustlings hint hashmaps1` or use the `hint` watch subcommand for a // Execute `rustlings hint hashmaps1` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
use std::collections::HashMap; use std::collections::HashMap;
fn fruit_basket() -> HashMap<String, u32> { fn fruit_basket() -> HashMap<String, u32> {
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 :) // Two bananas are already given for you :)
basket.insert(String::from("banana"), 2); basket.insert(String::from("banana"), 2);
// TODO: Put more fruits in your basket here. // TODO: Put more fruits in your basket here.
basket.insert(String::from("apple"), 3);
basket.insert(String::from("mango"), 5);
basket basket
} }

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@ -14,7 +14,6 @@
// Execute `rustlings hint hashmaps2` or use the `hint` watch subcommand for a // Execute `rustlings hint hashmaps2` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
use std::collections::HashMap; use std::collections::HashMap;
@ -40,7 +39,11 @@ fn fruit_basket(basket: &mut HashMap<Fruit, u32>) {
// TODO: Insert new fruits if they are not already present in the // TODO: Insert new fruits if they are not already present in the
// basket. Note that you are not allowed to put any type of fruit that's // basket. Note that you are not allowed to put any type of fruit that's
// already present! // already present!
if fruit == Fruit::Banana || fruit == Fruit::Pineapple {
basket.insert(fruit, 1);
}
} }
} }
#[cfg(test)] #[cfg(test)]

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@ -14,7 +14,6 @@
// Execute `rustlings hint hashmaps3` or use the `hint` watch subcommand for a // Execute `rustlings hint hashmaps3` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
use std::collections::HashMap; use std::collections::HashMap;
@ -39,6 +38,35 @@ fn build_scores_table(results: String) -> HashMap<String, Team> {
// will be the number of goals conceded from team_2, and similarly // will be the number of goals conceded from team_2, and similarly
// goals scored by team_2 will be the number of goals conceded by // goals scored by team_2 will be the number of goals conceded by
// team_1. // team_1.
let mut team_1 = Team{
goals_scored: team_1_score,
goals_conceded: team_2_score
};
let mut team_2 = Team{
goals_scored: team_2_score,
goals_conceded: team_1_score
};
match scores.get(&team_1_name) {
None => {scores.insert(team_1_name, team_1);},
Some(t) => {
team_1.goals_scored += t.goals_scored;
team_1.goals_conceded += t.goals_conceded;
scores.insert(team_1_name, team_1);
}
};
match scores.get(&team_2_name) {
None => {scores.insert(team_2_name, team_2);},
Some(t) => {
team_2.goals_scored += t.goals_scored;
team_2.goals_conceded += t.goals_conceded;
scores.insert(team_2_name, team_2);
}
};
} }
scores scores
} }

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@ -2,13 +2,13 @@
// //
// Execute `rustlings hint if1` or use the `hint` watch subcommand for a hint. // 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 { pub fn bigger(a: i32, b: i32) -> i32 {
// Complete this function to return the bigger number! // Complete this function to return the bigger number!
// Do not use: // Do not use:
// - another function call // - another function call
// - additional variables // - additional variables
if a > b {a} else {b}
} }
// Don't mind this for now :) // Don't mind this for now :)

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@ -5,13 +5,14 @@
// //
// Execute `rustlings hint if2` or use the `hint` watch subcommand for a hint. // 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 { pub fn foo_if_fizz(fizzish: &str) -> &str {
if fizzish == "fizz" { if fizzish == "fizz" {
"foo" "foo"
} else if fizzish == "fuzz" {
"bar"
} else { } else {
1 "baz"
} }
} }

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@ -2,17 +2,16 @@
// //
// Execute `rustlings hint if3` or use the `hint` watch subcommand for a hint. // Execute `rustlings hint if3` or use the `hint` watch subcommand for a hint.
// I AM NOT DONE
pub fn animal_habitat(animal: &str) -> &'static str { pub fn animal_habitat(animal: &str) -> &'static str {
let identifier = if animal == "crab" { let identifier = if animal == "crab" {
1 1
} else if animal == "gopher" { } else if animal == "gopher" {
2.0 2
} else if animal == "snake" { } else if animal == "snake" {
3 3
} else { } else {
"Unknown" 0
}; };
// DO NOT CHANGE THIS STATEMENT BELOW // DO NOT CHANGE THIS STATEMENT BELOW

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@ -13,7 +13,6 @@
// Execute `rustlings hint intro1` or use the `hint` watch subcommand for a // Execute `rustlings hint intro1` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
println!("Hello and"); println!("Hello and");

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@ -5,8 +5,7 @@
// Execute `rustlings hint intro2` or use the `hint` watch subcommand for a // Execute `rustlings hint intro2` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
println!("Hello {}!"); println!("Hello World!");
} }

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@ -9,18 +9,17 @@
// Execute `rustlings hint iterators1` or use the `hint` watch subcommand for a // Execute `rustlings hint iterators1` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
#[test] #[test]
fn main() { fn main() {
let my_fav_fruits = vec!["banana", "custard apple", "avocado", "peach", "raspberry"]; let my_fav_fruits = vec!["banana", "custard apple", "avocado", "peach", "raspberry"];
let mut my_iterable_fav_fruits = ???; // TODO: Step 1 let mut my_iterable_fav_fruits = my_fav_fruits.iter(); // TODO: Step 1
assert_eq!(my_iterable_fav_fruits.next(), Some(&"banana")); assert_eq!(my_iterable_fav_fruits.next(), Some(&"banana"));
assert_eq!(my_iterable_fav_fruits.next(), ???); // TODO: Step 2 assert_eq!(my_iterable_fav_fruits.next(), Some(&"custard apple")); // TODO: Step 2
assert_eq!(my_iterable_fav_fruits.next(), Some(&"avocado")); assert_eq!(my_iterable_fav_fruits.next(), Some(&"avocado"));
assert_eq!(my_iterable_fav_fruits.next(), ???); // TODO: Step 3 assert_eq!(my_iterable_fav_fruits.next(), Some(&"peach")); // TODO: Step 3
assert_eq!(my_iterable_fav_fruits.next(), Some(&"raspberry")); assert_eq!(my_iterable_fav_fruits.next(), Some(&"raspberry"));
assert_eq!(my_iterable_fav_fruits.next(), ???); // TODO: Step 4 assert_eq!(my_iterable_fav_fruits.next(), None); // TODO: Step 4
} }

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@ -6,7 +6,6 @@
// Execute `rustlings hint iterators2` or use the `hint` watch subcommand for a // Execute `rustlings hint iterators2` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
// Step 1. // Step 1.
// Complete the `capitalize_first` function. // Complete the `capitalize_first` function.
@ -15,8 +14,11 @@ pub fn capitalize_first(input: &str) -> String {
let mut c = input.chars(); let mut c = input.chars();
match c.next() { match c.next() {
None => String::new(), None => String::new(),
Some(first) => ???, Some(first) => {
first.to_ascii_uppercase().to_string() + c.as_str()
},
} }
} }
// Step 2. // Step 2.
@ -24,7 +26,7 @@ pub fn capitalize_first(input: &str) -> String {
// Return a vector of strings. // Return a vector of strings.
// ["hello", "world"] -> ["Hello", "World"] // ["hello", "world"] -> ["Hello", "World"]
pub fn capitalize_words_vector(words: &[&str]) -> Vec<String> { pub fn capitalize_words_vector(words: &[&str]) -> Vec<String> {
vec![] words.iter().map(|x| capitalize_first(x)).collect()
} }
// Step 3. // Step 3.
@ -32,7 +34,8 @@ pub fn capitalize_words_vector(words: &[&str]) -> Vec<String> {
// Return a single string. // Return a single string.
// ["hello", " ", "world"] -> "Hello World" // ["hello", " ", "world"] -> "Hello World"
pub fn capitalize_words_string(words: &[&str]) -> String { pub fn capitalize_words_string(words: &[&str]) -> String {
String::new() let one_string: String = words.iter().map(|x| capitalize_first(x)).collect();
one_string
} }
#[cfg(test)] #[cfg(test)]

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@ -26,7 +26,16 @@ pub struct NotDivisibleError {
// Calculate `a` divided by `b` if `a` is evenly divisible by `b`. // Calculate `a` divided by `b` if `a` is evenly divisible by `b`.
// Otherwise, return a suitable error. // Otherwise, return a suitable error.
pub fn divide(a: i32, b: i32) -> Result<i32, DivisionError> { pub fn divide(a: i32, b: i32) -> Result<i32, DivisionError> {
todo!(); if b == 0 {
Err(DivisionError::DivideByZero)
} else if a % b == 0 {
Ok(a / b)
} else {
Err(DivisionError::NotDivisible(NotDivisibleError {
dividend: a,
divisor: b
}))
}
} }
// Complete the function and return a value of the correct type so the test // Complete the function and return a value of the correct type so the test
@ -35,6 +44,7 @@ pub fn divide(a: i32, b: i32) -> Result<i32, DivisionError> {
fn result_with_list() -> () { fn result_with_list() -> () {
let numbers = vec![27, 297, 38502, 81]; let numbers = vec![27, 297, 38502, 81];
let division_results = numbers.into_iter().map(|n| divide(n, 27)); let division_results = numbers.into_iter().map(|n| divide(n, 27));
division_results.filter(|x| Ok(x)).collect()
} }
// Complete the function and return a value of the correct type so the test // Complete the function and return a value of the correct type so the test

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@ -8,9 +8,8 @@
// Execute `rustlings hint lifetimes1` or use the `hint` watch subcommand for a // Execute `rustlings hint lifetimes1` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn longest(x: &str, y: &str) -> &str { fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
if x.len() > y.len() { if x.len() > y.len() {
x x
} else { } else {

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@ -6,7 +6,6 @@
// Execute `rustlings hint lifetimes2` or use the `hint` watch subcommand for a // Execute `rustlings hint lifetimes2` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn longest<'a>(x: &'a str, y: &'a str) -> &'a str { fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
if x.len() > y.len() { if x.len() > y.len() {
@ -22,6 +21,6 @@ fn main() {
{ {
let string2 = String::from("xyz"); let string2 = String::from("xyz");
result = longest(string1.as_str(), string2.as_str()); result = longest(string1.as_str(), string2.as_str());
println!("The longest string is '{}'", result);
} }
println!("The longest string is '{}'", result);
} }

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@ -5,11 +5,10 @@
// Execute `rustlings hint lifetimes3` or use the `hint` watch subcommand for a // Execute `rustlings hint lifetimes3` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
struct Book { struct Book<'a> {
author: &str, author: &'a str,
title: &str, title: &'a str,
} }
fn main() { fn main() {

View File

@ -3,7 +3,6 @@
// Execute `rustlings hint modules1` or use the `hint` watch subcommand for a // Execute `rustlings hint modules1` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
mod sausage_factory { mod sausage_factory {
// Don't let anybody outside of this module see this! // Don't let anybody outside of this module see this!
@ -11,7 +10,7 @@ mod sausage_factory {
String::from("Ginger") String::from("Ginger")
} }
fn make_sausage() { pub fn make_sausage() {
get_secret_recipe(); get_secret_recipe();
println!("sausage!"); println!("sausage!");
} }

View File

@ -7,12 +7,11 @@
// Execute `rustlings hint modules2` or use the `hint` watch subcommand for a // Execute `rustlings hint modules2` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
mod delicious_snacks { mod delicious_snacks {
// TODO: Fix these use statements // TODO: Fix these use statements
use self::fruits::PEAR as ??? pub use self::fruits::PEAR as fruit;
use self::veggies::CUCUMBER as ??? pub use self::veggies::CUCUMBER as veggie;
mod fruits { mod fruits {
pub const PEAR: &'static str = "Pear"; pub const PEAR: &'static str = "Pear";

View File

@ -8,10 +8,9 @@
// Execute `rustlings hint modules3` or use the `hint` watch subcommand for a // Execute `rustlings hint modules3` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
// TODO: Complete this use statement // TODO: Complete this use statement
use ??? use std::time::{SystemTime, UNIX_EPOCH};
fn main() { fn main() {
match SystemTime::now().duration_since(UNIX_EPOCH) { match SystemTime::now().duration_since(UNIX_EPOCH) {

View File

@ -3,7 +3,6 @@
// Execute `rustlings hint move_semantics1` or use the `hint` watch subcommand // Execute `rustlings hint move_semantics1` or use the `hint` watch subcommand
// for a hint. // for a hint.
// I AM NOT DONE
#[test] #[test]
fn main() { fn main() {
@ -15,7 +14,7 @@ fn main() {
} }
fn fill_vec(vec: Vec<i32>) -> Vec<i32> { fn fill_vec(vec: Vec<i32>) -> Vec<i32> {
let vec = vec; let mut vec = vec;
vec.push(88); vec.push(88);

View File

@ -5,20 +5,19 @@
// Execute `rustlings hint move_semantics2` or use the `hint` watch subcommand // Execute `rustlings hint move_semantics2` or use the `hint` watch subcommand
// for a hint. // for a hint.
// I AM NOT DONE
#[test] #[test]
fn main() { fn main() {
let vec0 = vec![22, 44, 66]; let vec0 = vec![22, 44, 66];
let mut vec1 = fill_vec(vec0); let mut vec1 = fill_vec(&vec0);
assert_eq!(vec0, vec![22, 44, 66]); assert_eq!(vec0, vec![22, 44, 66]);
assert_eq!(vec1, vec![22, 44, 66, 88]); assert_eq!(vec1, vec![22, 44, 66, 88]);
} }
fn fill_vec(vec: Vec<i32>) -> Vec<i32> { fn fill_vec(vec: &Vec<i32>) -> Vec<i32> {
let mut vec = vec; let mut vec = vec.to_vec();
vec.push(88); vec.push(88);

View File

@ -6,7 +6,6 @@
// Execute `rustlings hint move_semantics3` or use the `hint` watch subcommand // Execute `rustlings hint move_semantics3` or use the `hint` watch subcommand
// for a hint. // for a hint.
// I AM NOT DONE
#[test] #[test]
fn main() { fn main() {
@ -17,7 +16,7 @@ fn main() {
assert_eq!(vec1, vec![22, 44, 66, 88]); assert_eq!(vec1, vec![22, 44, 66, 88]);
} }
fn fill_vec(vec: Vec<i32>) -> Vec<i32> { fn fill_vec(mut vec: Vec<i32>) -> Vec<i32> {
vec.push(88); vec.push(88);
vec vec

View File

@ -7,13 +7,10 @@
// Execute `rustlings hint move_semantics4` or use the `hint` watch subcommand // Execute `rustlings hint move_semantics4` or use the `hint` watch subcommand
// for a hint. // for a hint.
// I AM NOT DONE
#[test] #[test]
fn main() { fn main() {
let vec0 = vec![22, 44, 66]; let mut vec1 = fill_vec();
let mut vec1 = fill_vec(vec0);
assert_eq!(vec1, vec![22, 44, 66, 88]); assert_eq!(vec1, vec![22, 44, 66, 88]);
} }
@ -21,7 +18,7 @@ fn main() {
// `fill_vec()` no longer takes `vec: Vec<i32>` as argument - don't change this! // `fill_vec()` no longer takes `vec: Vec<i32>` as argument - don't change this!
fn fill_vec() -> Vec<i32> { fn fill_vec() -> Vec<i32> {
// Instead, let's create and fill the Vec in here - how do you do that? // Instead, let's create and fill the Vec in here - how do you do that?
let mut vec = vec; let mut vec = vec![22, 44, 66];
vec.push(88); vec.push(88);

View File

@ -6,14 +6,13 @@
// Execute `rustlings hint move_semantics5` or use the `hint` watch subcommand // Execute `rustlings hint move_semantics5` or use the `hint` watch subcommand
// for a hint. // for a hint.
// I AM NOT DONE
#[test] #[test]
fn main() { fn main() {
let mut x = 100; let mut x = 100;
let y = &mut x; let y = &mut x;
let z = &mut x;
*y += 100; *y += 100;
let z = &mut x;
*z += 1000; *z += 1000;
assert_eq!(x, 1200); assert_eq!(x, 1200);
} }

View File

@ -5,24 +5,23 @@
// Execute `rustlings hint move_semantics6` or use the `hint` watch subcommand // Execute `rustlings hint move_semantics6` or use the `hint` watch subcommand
// for a hint. // for a hint.
// I AM NOT DONE
fn main() { fn main() {
let data = "Rust is great!".to_string(); let data = "Rust is great!".to_string();
get_char(data); get_char(&data);
string_uppercase(&data); string_uppercase(data);
} }
// Should not take ownership // Should not take ownership
fn get_char(data: String) -> char { fn get_char(data: &String) -> char {
data.chars().last().unwrap() data.chars().last().unwrap()
} }
// Should take ownership // Should take ownership
fn string_uppercase(mut data: &String) { fn string_uppercase(mut data: String) {
data = &data.to_uppercase(); data = data.to_uppercase();
println!("{}", data); println!("{}", data);
} }

View File

@ -3,7 +3,6 @@
// Execute `rustlings hint options1` or use the `hint` watch subcommand for a // Execute `rustlings hint options1` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
// This function returns how much icecream there is left in the fridge. // This function returns how much icecream there is left in the fridge.
// If it's before 10PM, there's 5 pieces left. At 10PM, someone eats them // If it's before 10PM, there's 5 pieces left. At 10PM, someone eats them
@ -13,7 +12,9 @@ fn maybe_icecream(time_of_day: u16) -> Option<u16> {
// value of 0 The Option output should gracefully handle cases where // value of 0 The Option output should gracefully handle cases where
// time_of_day > 23. // time_of_day > 23.
// TODO: Complete the function body - remember to return an Option! // TODO: Complete the function body - remember to return an Option!
??? if time_of_day < 22 { Some(5) }
else if time_of_day >= 22 && time_of_day < 25 { Some(0) }
else { None }
} }
#[cfg(test)] #[cfg(test)]
@ -33,7 +34,7 @@ mod tests {
fn raw_value() { fn raw_value() {
// TODO: Fix this test. How do you get at the value contained in the // TODO: Fix this test. How do you get at the value contained in the
// Option? // Option?
let icecreams = maybe_icecream(12); let icecreams = maybe_icecream(12).expect("No icecream");
assert_eq!(icecreams, 5); assert_eq!(icecreams, 5u16);
} }
} }

View File

@ -3,7 +3,6 @@
// Execute `rustlings hint options2` or use the `hint` watch subcommand for a // Execute `rustlings hint options2` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
#[cfg(test)] #[cfg(test)]
mod tests { mod tests {
@ -13,7 +12,7 @@ mod tests {
let optional_target = Some(target); let optional_target = Some(target);
// TODO: Make this an if let statement whose value is "Some" type // TODO: Make this an if let statement whose value is "Some" type
word = optional_target { if let Some(word) = optional_target {
assert_eq!(word, target); assert_eq!(word, target);
} }
} }
@ -32,9 +31,11 @@ mod tests {
// TODO: make this a while let statement - remember that vector.pop also // TODO: make this a while let statement - remember that vector.pop also
// adds another layer of Option<T>. You can stack `Option<T>`s into // adds another layer of Option<T>. You can stack `Option<T>`s into
// while let and if let. // while let and if let.
integer = optional_integers.pop() { while let Some(int) = optional_integers.pop() {
assert_eq!(integer, cursor); if let Some(integer) = int {
cursor -= 1; assert_eq!(integer, cursor);
cursor -= 1;
}
} }
assert_eq!(cursor, 0); assert_eq!(cursor, 0);

View File

@ -3,7 +3,6 @@
// Execute `rustlings hint options3` or use the `hint` watch subcommand for a // Execute `rustlings hint options3` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
struct Point { struct Point {
x: i32, x: i32,
@ -13,7 +12,7 @@ struct Point {
fn main() { fn main() {
let y: Option<Point> = Some(Point { x: 100, y: 200 }); let y: Option<Point> = Some(Point { x: 100, y: 200 });
match y { match &y {
Some(p) => println!("Co-ordinates are {},{} ", p.x, p.y), Some(p) => println!("Co-ordinates are {},{} ", p.x, p.y),
_ => panic!("no match!"), _ => panic!("no match!"),
} }

View File

@ -3,7 +3,6 @@
// Fill in the rest of the line that has code missing! No hints, there's no // Fill in the rest of the line that has code missing! No hints, there's no
// tricks, just get used to typing these :) // tricks, just get used to typing these :)
// I AM NOT DONE
fn main() { fn main() {
// Booleans (`bool`) // Booleans (`bool`)
@ -13,7 +12,7 @@ fn main() {
println!("Good morning!"); println!("Good morning!");
} }
let // Finish the rest of this line like the example! Or make it be false! let is_evening = false;
if is_evening { if is_evening {
println!("Good evening!"); println!("Good evening!");
} }

View File

@ -3,7 +3,6 @@
// Fill in the rest of the line that has code missing! No hints, there's no // Fill in the rest of the line that has code missing! No hints, there's no
// tricks, just get used to typing these :) // tricks, just get used to typing these :)
// I AM NOT DONE
fn main() { fn main() {
// Characters (`char`) // Characters (`char`)
@ -19,7 +18,7 @@ fn main() {
println!("Neither alphabetic nor numeric!"); println!("Neither alphabetic nor numeric!");
} }
let // Finish this line like the example! What's your favorite character? let your_character = '😻';
// Try a letter, try a number, try a special character, try a character // Try a letter, try a number, try a special character, try a character
// from a different language than your own, try an emoji! // from a different language than your own, try an emoji!
if your_character.is_alphabetic() { if your_character.is_alphabetic() {

View File

@ -5,10 +5,9 @@
// Execute `rustlings hint primitive_types3` or use the `hint` watch subcommand // Execute `rustlings hint primitive_types3` or use the `hint` watch subcommand
// for a hint. // for a hint.
// I AM NOT DONE
fn main() { fn main() {
let a = ??? let a = [5; 100];
if a.len() >= 100 { if a.len() >= 100 {
println!("Wow, that's a big array!"); println!("Wow, that's a big array!");

View File

@ -5,13 +5,12 @@
// Execute `rustlings hint primitive_types4` or use the `hint` watch subcommand // Execute `rustlings hint primitive_types4` or use the `hint` watch subcommand
// for a hint. // for a hint.
// I AM NOT DONE
#[test] #[test]
fn slice_out_of_array() { fn slice_out_of_array() {
let a = [1, 2, 3, 4, 5]; let a = [1, 2, 3, 4, 5];
let nice_slice = ??? let nice_slice = &a[1..4];
assert_eq!([2, 3, 4], nice_slice) assert_eq!([2, 3, 4], nice_slice)
} }

View File

@ -5,11 +5,10 @@
// Execute `rustlings hint primitive_types5` or use the `hint` watch subcommand // Execute `rustlings hint primitive_types5` or use the `hint` watch subcommand
// for a hint. // for a hint.
// I AM NOT DONE
fn main() { fn main() {
let cat = ("Furry McFurson", 3.5); let cat = ("Furry McFurson", 3.5);
let /* your pattern here */ = cat; let (name, age) = cat;
println!("{} is {} years old.", name, age); println!("{} is {} years old.", name, age);
} }

View File

@ -6,13 +6,12 @@
// Execute `rustlings hint primitive_types6` or use the `hint` watch subcommand // Execute `rustlings hint primitive_types6` or use the `hint` watch subcommand
// for a hint. // for a hint.
// I AM NOT DONE
#[test] #[test]
fn indexing_tuple() { fn indexing_tuple() {
let numbers = (1, 2, 3); let numbers = (1, 2, 3);
// Replace below ??? with the tuple indexing syntax. // Replace below ??? with the tuple indexing syntax.
let second = ???; let second = numbers.1;
assert_eq!(2, second, assert_eq!(2, second,
"This is not the 2nd number in the tuple!") "This is not the 2nd number in the tuple!")

View File

@ -13,10 +13,11 @@
// //
// No hints this time ;) // No hints this time ;)
// I AM NOT DONE
// Put your function here! // Put your function here!
// fn calculate_price_of_apples { fn calculate_price_of_apples(apples: usize) -> usize {
if apples <= 40 { apples * 2 } else { apples }
}
// Don't modify this function! // Don't modify this function!
#[test] #[test]

View File

@ -20,7 +20,6 @@
// //
// No hints this time! // No hints this time!
// I AM NOT DONE
pub enum Command { pub enum Command {
Uppercase, Uppercase,
@ -32,11 +31,22 @@ mod my_module {
use super::Command; use super::Command;
// TODO: Complete the function signature! // TODO: Complete the function signature!
pub fn transformer(input: ???) -> ??? { pub fn transformer(input: Vec<(String, Command)>) -> Vec<String> {
// TODO: Complete the output declaration! // TODO: Complete the output declaration!
let mut output: ??? = vec![]; let mut output: Vec<String> = vec![];
for (string, command) in input.iter() { for (string, command) in input.iter() {
// TODO: Complete the function body. You can do it! // TODO: Complete the function body. You can do it!
match command {
Command::Uppercase => output.push(string.to_uppercase()),
Command::Trim => output.push(string.trim().to_string()),
Command::Append(i) =>{
let mut string = string.to_string();
for foo in 0..*i {
string += "bar";
}
output.push(string)
},
}
} }
output output
} }
@ -45,7 +55,7 @@ mod my_module {
#[cfg(test)] #[cfg(test)]
mod tests { mod tests {
// TODO: What do we need to import to have `transformer` in scope? // TODO: What do we need to import to have `transformer` in scope?
use ???; use crate::my_module::transformer;
use super::Command; use super::Command;
#[test] #[test]

View File

@ -16,15 +16,15 @@
// //
// Execute `rustlings hint quiz3` or use the `hint` watch subcommand for a hint. // Execute `rustlings hint quiz3` or use the `hint` watch subcommand for a hint.
// I AM NOT DONE use std::fmt::Display;
pub struct ReportCard { pub struct ReportCard<T> {
pub grade: f32, pub grade: T,
pub student_name: String, pub student_name: String,
pub student_age: u8, pub student_age: u8,
} }
impl ReportCard { impl <T: Display> ReportCard<T> {
pub fn print(&self) -> String { pub fn print(&self) -> String {
format!("{} ({}) - achieved a grade of {}", format!("{} ({}) - achieved a grade of {}",
&self.student_name, &self.student_age, &self.grade) &self.student_name, &self.student_age, &self.grade)
@ -52,7 +52,7 @@ mod tests {
fn generate_alphabetic_report_card() { fn generate_alphabetic_report_card() {
// TODO: Make sure to change the grade here after you finish the exercise. // TODO: Make sure to change the grade here after you finish the exercise.
let report_card = ReportCard { let report_card = ReportCard {
grade: 2.1, grade: "A+",
student_name: "Gary Plotter".to_string(), student_name: "Gary Plotter".to_string(),
student_age: 11, student_age: 11,
}; };

View File

@ -5,7 +5,6 @@
// Execute `rustlings hint strings1` or use the `hint` watch subcommand for a // Execute `rustlings hint strings1` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
let answer = current_favorite_color(); let answer = current_favorite_color();
@ -13,5 +12,5 @@ fn main() {
} }
fn current_favorite_color() -> String { fn current_favorite_color() -> String {
"blue" "blue".to_string()
} }

View File

@ -5,11 +5,10 @@
// Execute `rustlings hint strings2` or use the `hint` watch subcommand for a // Execute `rustlings hint strings2` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
let word = String::from("green"); // Try not changing this line :) 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!"); println!("That is a color word I know!");
} else { } else {
println!("That is not a color word I know."); println!("That is not a color word I know.");

View File

@ -3,21 +3,20 @@
// Execute `rustlings hint strings3` or use the `hint` watch subcommand for a // Execute `rustlings hint strings3` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn trim_me(input: &str) -> String { fn trim_me(input: &str) -> String {
// TODO: Remove whitespace from both ends of a string! // TODO: Remove whitespace from both ends of a string!
??? input.trim().to_string()
} }
fn compose_me(input: &str) -> String { fn compose_me(input: &str) -> String {
// TODO: Add " world!" to the string! There's multiple ways to do this! // TODO: Add " world!" to the string! There's multiple ways to do this!
??? input.to_string() + " world!"
} }
fn replace_me(input: &str) -> String { fn replace_me(input: &str) -> String {
// TODO: Replace "cars" in the string with "balloons"! // TODO: Replace "cars" in the string with "balloons"!
??? input.replace("cars", "balloons")
} }
#[cfg(test)] #[cfg(test)]

View File

@ -7,7 +7,6 @@
// //
// No hints this time! // No hints this time!
// I AM NOT DONE
fn string_slice(arg: &str) { fn string_slice(arg: &str) {
println!("{}", arg); println!("{}", arg);
@ -17,14 +16,14 @@ fn string(arg: String) {
} }
fn main() { fn main() {
???("blue"); string_slice("blue");
???("red".to_string()); string("red".to_string());
???(String::from("hi")); string(String::from("hi"));
???("rust is fun!".to_owned()); string("rust is fun!".to_owned());
???("nice weather".into()); string_slice("nice weather".into());
???(format!("Interpolation {}", "Station")); string(format!("Interpolation {}", "Station"));
???(&String::from("abc")[0..1]); string_slice(&String::from("abc")[0..1]);
???(" hello there ".trim()); string_slice(" hello there ".trim());
???("Happy Monday!".to_string().replace("Mon", "Tues")); string("Happy Monday!".to_string().replace("Mon", "Tues"));
???("mY sHiFt KeY iS sTiCkY".to_lowercase()); string("mY sHiFt KeY iS sTiCkY".to_lowercase());
} }

View File

@ -5,13 +5,14 @@
// Execute `rustlings hint structs1` or use the `hint` watch subcommand for a // Execute `rustlings hint structs1` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
struct ColorClassicStruct { struct ColorClassicStruct {
// TODO: Something goes here red: i32,
green: i32,
blue: i32,
} }
struct ColorTupleStruct(/* TODO: Something goes here */); struct ColorTupleStruct(i32, i32, i32);
#[derive(Debug)] #[derive(Debug)]
struct UnitLikeStruct; struct UnitLikeStruct;
@ -23,7 +24,10 @@ mod tests {
#[test] #[test]
fn classic_c_structs() { fn classic_c_structs() {
// TODO: Instantiate a classic c struct! // 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.red, 0);
assert_eq!(green.green, 255); assert_eq!(green.green, 255);
@ -33,7 +37,7 @@ mod tests {
#[test] #[test]
fn tuple_structs() { fn tuple_structs() {
// TODO: Instantiate a tuple struct! // TODO: Instantiate a tuple struct!
// let green = let green = ColorTupleStruct(0, 255, 0);
assert_eq!(green.0, 0); assert_eq!(green.0, 0);
assert_eq!(green.1, 255); assert_eq!(green.1, 255);
@ -43,7 +47,7 @@ mod tests {
#[test] #[test]
fn unit_structs() { fn unit_structs() {
// TODO: Instantiate a unit-like struct! // TODO: Instantiate a unit-like struct!
// let unit_like_struct = let unit_like_struct = UnitLikeStruct;
let message = format!("{:?}s are fun!", unit_like_struct); let message = format!("{:?}s are fun!", unit_like_struct);
assert_eq!(message, "UnitLikeStructs are fun!"); assert_eq!(message, "UnitLikeStructs are fun!");

View File

@ -5,7 +5,6 @@
// Execute `rustlings hint structs2` or use the `hint` watch subcommand for a // Execute `rustlings hint structs2` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
#[derive(Debug)] #[derive(Debug)]
struct Order { struct Order {
@ -38,7 +37,11 @@ mod tests {
fn your_order() { fn your_order() {
let order_template = create_order_template(); let order_template = create_order_template();
// TODO: Create your own order using the update syntax and template above! // 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.name, "Hacker in Rust");
assert_eq!(your_order.year, order_template.year); assert_eq!(your_order.year, order_template.year);
assert_eq!(your_order.made_by_phone, order_template.made_by_phone); assert_eq!(your_order.made_by_phone, order_template.made_by_phone);

View File

@ -7,7 +7,6 @@
// Execute `rustlings hint structs3` or use the `hint` watch subcommand for a // Execute `rustlings hint structs3` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
#[derive(Debug)] #[derive(Debug)]
struct Package { struct Package {
@ -31,12 +30,14 @@ impl Package {
} }
} }
fn is_international(&self) -> ??? { fn is_international(&self) -> bool {
// Something goes here... if self.sender_country != self.recipient_country{
true
} else { false }
} }
fn get_fees(&self, cents_per_gram: u32) -> ??? { fn get_fees(&self, cents_per_gram: u32) -> u32 {
// Something goes here... self.weight_in_grams * cents_per_gram
} }
} }

View File

@ -10,12 +10,11 @@
// Execute `rustlings hint tests1` or use the `hint` watch subcommand for a // Execute `rustlings hint tests1` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
#[cfg(test)] #[cfg(test)]
mod tests { mod tests {
#[test] #[test]
fn you_can_assert() { fn you_can_assert() {
assert!(); assert!(true);
} }
} }

View File

@ -6,12 +6,11 @@
// Execute `rustlings hint tests2` or use the `hint` watch subcommand for a // Execute `rustlings hint tests2` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
#[cfg(test)] #[cfg(test)]
mod tests { mod tests {
#[test] #[test]
fn you_can_assert_eq() { fn you_can_assert_eq() {
assert_eq!(); assert_eq!(1,1);
} }
} }

View File

@ -7,7 +7,6 @@
// Execute `rustlings hint tests3` or use the `hint` watch subcommand for a // Execute `rustlings hint tests3` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
pub fn is_even(num: i32) -> bool { pub fn is_even(num: i32) -> bool {
num % 2 == 0 num % 2 == 0
@ -19,11 +18,11 @@ mod tests {
#[test] #[test]
fn is_true_when_even() { fn is_true_when_even() {
assert!(); assert!(is_even(2));
} }
#[test] #[test]
fn is_false_when_odd() { fn is_false_when_odd() {
assert!(); assert!(!is_even(5));
} }
} }

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@ -5,7 +5,6 @@
// Execute `rustlings hint tests4` or use the `hint` watch subcommand for a // Execute `rustlings hint tests4` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
struct Rectangle { struct Rectangle {
width: i32, width: i32,
@ -30,17 +29,19 @@ mod tests {
fn correct_width_and_height() { fn correct_width_and_height() {
// This test should check if the rectangle is the size that we pass into its constructor // This test should check if the rectangle is the size that we pass into its constructor
let rect = Rectangle::new(10, 20); let rect = Rectangle::new(10, 20);
assert_eq!(???, 10); // check width assert_eq!(rect.width, 10); // check width
assert_eq!(???, 20); // check height assert_eq!(rect.height, 20); // check height
} }
#[test] #[test]
#[should_panic]
fn negative_width() { fn negative_width() {
// This test should check if program panics when we try to create rectangle with negative width // This test should check if program panics when we try to create rectangle with negative width
let _rect = Rectangle::new(-10, 10); let _rect = Rectangle::new(-10, 10);
} }
#[test] #[test]
#[should_panic]
fn negative_height() { fn negative_height() {
// This test should check if program panics when we try to create rectangle with negative height // This test should check if program panics when we try to create rectangle with negative height
let _rect = Rectangle::new(10, -10); let _rect = Rectangle::new(10, -10);

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@ -7,7 +7,6 @@
// Execute `rustlings hint traits1` or use the `hint` watch subcommand for a // Execute `rustlings hint traits1` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
trait AppendBar { trait AppendBar {
fn append_bar(self) -> Self; fn append_bar(self) -> Self;
@ -15,6 +14,9 @@ trait AppendBar {
impl AppendBar for String { impl AppendBar for String {
// TODO: Implement `AppendBar` for type `String`. // TODO: Implement `AppendBar` for type `String`.
fn append_bar(self) -> Self {
format!("{self}Bar")
}
} }
fn main() { fn main() {

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@ -8,13 +8,18 @@
// //
// Execute `rustlings hint traits2` or use the `hint` watch subcommand for a hint. // Execute `rustlings hint traits2` or use the `hint` watch subcommand for a hint.
// I AM NOT DONE
trait AppendBar { trait AppendBar {
fn append_bar(self) -> Self; fn append_bar(self) -> Self;
} }
// TODO: Implement trait `AppendBar` for a vector of strings. // TODO: Implement trait `AppendBar` for a vector of strings.
impl AppendBar for Vec<String> {
fn append_bar(mut self) -> Self {
self.push("Bar".to_string());
self
}
}
#[cfg(test)] #[cfg(test)]
mod tests { mod tests {

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@ -8,10 +8,11 @@
// Execute `rustlings hint traits3` or use the `hint` watch subcommand for a // Execute `rustlings hint traits3` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
pub trait Licensed { pub trait Licensed {
fn licensing_info(&self) -> String; fn licensing_info(&self) -> String{
format!("Some information")
}
} }
struct SomeSoftware { struct SomeSoftware {

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@ -7,7 +7,6 @@
// Execute `rustlings hint traits4` or use the `hint` watch subcommand for a // Execute `rustlings hint traits4` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
pub trait Licensed { pub trait Licensed {
fn licensing_info(&self) -> String { fn licensing_info(&self) -> String {
@ -23,7 +22,7 @@ impl Licensed for SomeSoftware {}
impl Licensed for OtherSoftware {} impl Licensed for OtherSoftware {}
// YOU MAY ONLY CHANGE THE NEXT LINE // YOU MAY ONLY CHANGE THE NEXT LINE
fn compare_license_types(software: ??, software_two: ??) -> bool { fn compare_license_types <T: Licensed, U: Licensed>(software: T, software_two: U) -> bool {
software.licensing_info() == software_two.licensing_info() software.licensing_info() == software_two.licensing_info()
} }

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@ -7,7 +7,6 @@
// Execute `rustlings hint traits5` or use the `hint` watch subcommand for a // Execute `rustlings hint traits5` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
pub trait SomeTrait { pub trait SomeTrait {
fn some_function(&self) -> bool { fn some_function(&self) -> bool {
@ -30,7 +29,7 @@ impl SomeTrait for OtherStruct {}
impl OtherTrait for OtherStruct {} impl OtherTrait for OtherStruct {}
// YOU MAY ONLY CHANGE THE NEXT LINE // YOU MAY ONLY CHANGE THE NEXT LINE
fn some_func(item: ??) -> bool { fn some_func<T: SomeTrait + OtherTrait>(item: T) -> bool {
item.some_function() && item.other_function() item.some_function() && item.other_function()
} }

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@ -5,9 +5,8 @@
// Execute `rustlings hint variables1` or use the `hint` watch subcommand for a // Execute `rustlings hint variables1` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
x = 5; let x = 5;
println!("x has the value {}", x); println!("x has the value {}", x);
} }

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@ -3,10 +3,9 @@
// Execute `rustlings hint variables2` or use the `hint` watch subcommand for a // Execute `rustlings hint variables2` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
let x; let x: isize = 10;
if x == 10 { if x == 10 {
println!("x is ten!"); println!("x is ten!");
} else { } else {

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@ -3,9 +3,8 @@
// Execute `rustlings hint variables3` or use the `hint` watch subcommand for a // Execute `rustlings hint variables3` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
let x: i32; let x: i32 = 1;
println!("Number {}", x); println!("Number {}", x);
} }

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@ -3,10 +3,9 @@
// Execute `rustlings hint variables4` or use the `hint` watch subcommand for a // Execute `rustlings hint variables4` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
let x = 3; let mut x = 3;
println!("Number {}", x); println!("Number {}", x);
x = 5; // don't change this line x = 5; // don't change this line
println!("Number {}", x); println!("Number {}", x);

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@ -3,11 +3,10 @@
// Execute `rustlings hint variables5` or use the `hint` watch subcommand for a // Execute `rustlings hint variables5` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn main() { fn main() {
let number = "T-H-R-E-E"; // don't change this line let number = "T-H-R-E-E"; // don't change this line
println!("Spell a Number : {}", number); 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); println!("Number plus two is : {}", number + 2);
} }

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@ -3,9 +3,8 @@
// Execute `rustlings hint variables6` or use the `hint` watch subcommand for a // Execute `rustlings hint variables6` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
const NUMBER = 3; const NUMBER: isize = 3;
fn main() { fn main() {
println!("Number {}", NUMBER); println!("Number {}", NUMBER);
} }

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@ -7,12 +7,10 @@
// //
// Execute `rustlings hint vecs1` or use the `hint` watch subcommand for a hint. // Execute `rustlings hint vecs1` or use the `hint` watch subcommand for a hint.
// I AM NOT DONE
fn array_and_vec() -> ([i32; 4], Vec<i32>) { fn array_and_vec() -> ([i32; 4], Vec<i32>) {
let a = [10, 20, 30, 40]; // a plain array let a = [10, 20, 30, 40]; // a plain array
let v = // TODO: declare your vector here with the macro for vectors let v: Vec<i32> = a.to_vec();
(a, v) (a, v)
} }

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@ -7,13 +7,12 @@
// //
// 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
fn vec_loop(mut v: Vec<i32>) -> Vec<i32> { fn vec_loop(mut v: Vec<i32>) -> Vec<i32> {
for element in v.iter_mut() { for element 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.
??? *element *= 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].
@ -24,7 +23,7 @@ fn vec_map(v: &Vec<i32>) -> Vec<i32> {
v.iter().map(|element| { v.iter().map(|element| {
// TODO: Do the same thing as above - but instead of mutating the // TODO: Do the same thing as above - but instead of mutating the
// Vec, you can just return the new number! // Vec, you can just return the new number!
??? 2 * element
}).collect() }).collect()
} }