From 48c8a4337001b14c0ef5c36b894979d5f2a910d2 Mon Sep 17 00:00:00 2001 From: Linny <1223530014@qq.com> Date: Wed, 4 Sep 2024 10:34:16 +0800 Subject: [PATCH] rustlings --- exercises/clippy/clippy1.rs | 4 +- exercises/clippy/clippy2.rs | 4 +- exercises/clippy/clippy3.rs | 14 +++---- exercises/conversions/as_ref_mut.rs | 11 +++--- exercises/conversions/from_into.rs | 19 +++++++++- exercises/conversions/from_str.rs | 20 +++++++++- exercises/conversions/try_from_into.rs | 21 +++++++++- exercises/conversions/using_as.rs | 4 +- exercises/enums/enums1.rs | 6 ++- exercises/enums/enums2.rs | 6 ++- exercises/enums/enums3.rs | 20 +++++++++- exercises/error_handling/errors1.rs | 8 ++-- exercises/error_handling/errors2.rs | 4 +- exercises/error_handling/errors3.rs | 5 ++- exercises/error_handling/errors4.rs | 8 +++- exercises/error_handling/errors5.rs | 5 ++- exercises/error_handling/errors6.rs | 13 +++++-- exercises/functions/functions1.rs | 6 ++- exercises/functions/functions2.rs | 4 +- exercises/functions/functions3.rs | 4 +- exercises/functions/functions4.rs | 4 +- exercises/functions/functions5.rs | 4 +- exercises/generics/generics1.rs | 4 +- exercises/generics/generics2.rs | 10 ++--- exercises/hashmaps/hashmaps1.rs | 7 ++-- exercises/hashmaps/hashmaps2.rs | 3 +- exercises/hashmaps/hashmaps3.rs | 9 ++++- exercises/if/if1.rs | 7 +++- exercises/if/if2.rs | 8 ++-- exercises/if/if3.rs | 6 +-- exercises/intro/intro1.rs | 2 +- exercises/intro/intro2.rs | 4 +- exercises/iterators/iterators1.rs | 10 ++--- exercises/iterators/iterators2.rs | 29 ++++++++++++-- exercises/iterators/iterators3.rs | 30 +++++++++++++-- exercises/iterators/iterators4.rs | 2 +- exercises/iterators/iterators5.rs | 38 +++++++++++++++++-- exercises/lifetimes/lifetimes1.rs | 4 +- exercises/lifetimes/lifetimes2.rs | 4 +- exercises/lifetimes/lifetimes3.rs | 8 ++-- exercises/macros/macros1.rs | 4 +- exercises/macros/macros2.rs | 9 ++--- exercises/macros/macros3.rs | 2 +- exercises/macros/macros4.rs | 6 +-- exercises/modules/modules1.rs | 4 +- exercises/modules/modules2.rs | 6 +-- exercises/modules/modules3.rs | 5 ++- exercises/move_semantics/move_semantics1.rs | 4 +- exercises/move_semantics/move_semantics2.rs | 10 ++--- exercises/move_semantics/move_semantics3.rs | 5 ++- exercises/move_semantics/move_semantics4.rs | 6 +-- exercises/move_semantics/move_semantics5.rs | 4 +- exercises/move_semantics/move_semantics6.rs | 8 ++-- exercises/options/options1.rs | 12 ++++-- exercises/options/options2.rs | 6 +-- exercises/options/options3.rs | 4 +- 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 | 13 +++++-- exercises/quiz3.rs | 12 +++--- exercises/smart_pointers/arc1.rs | 6 +-- exercises/smart_pointers/box1.rs | 8 ++-- exercises/smart_pointers/cow1.rs | 8 +++- exercises/smart_pointers/rc1.rs | 13 ++++--- exercises/strings/strings1.rs | 4 +- exercises/strings/strings2.rs | 4 +- exercises/strings/strings3.rs | 8 ++-- exercises/strings/strings4.rs | 22 +++++------ exercises/structs/structs1.rs | 17 ++++++--- exercises/structs/structs2.rs | 8 +++- exercises/structs/structs3.rs | 8 ++-- exercises/tests/tests1.rs | 4 +- exercises/tests/tests2.rs | 4 +- exercises/tests/tests3.rs | 6 +-- exercises/tests/tests4.rs | 11 +++--- exercises/threads/threads1.rs | 3 +- exercises/threads/threads2.rs | 10 ++--- exercises/threads/threads3.rs | 5 ++- exercises/traits/traits1.rs | 5 ++- exercises/traits/traits2.rs | 9 ++++- exercises/traits/traits3.rs | 6 ++- exercises/traits/traits4.rs | 4 +- exercises/traits/traits5.rs | 4 +- exercises/variables/variables1.rs | 4 +- exercises/variables/variables2.rs | 4 +- exercises/variables/variables3.rs | 3 +- exercises/variables/variables4.rs | 3 +- exercises/variables/variables5.rs | 4 +- exercises/variables/variables6.rs | 4 +- exercises/vecs/vecs1.rs | 4 +- exercises/vecs/vecs2.rs | 6 +-- 96 files changed, 492 insertions(+), 250 deletions(-) diff --git a/exercises/clippy/clippy1.rs b/exercises/clippy/clippy1.rs index 95c0141f..3b01ad5c 100644 --- a/exercises/clippy/clippy1.rs +++ b/exercises/clippy/clippy1.rs @@ -9,12 +9,12 @@ // Execute `rustlings hint clippy1` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + use std::f32; fn main() { - let pi = 3.14f32; + let pi = f32::consts::PI; let radius = 5.00f32; let area = pi * f32::powi(radius, 2); diff --git a/exercises/clippy/clippy2.rs b/exercises/clippy/clippy2.rs index 9b87a0b7..3250cad5 100644 --- a/exercises/clippy/clippy2.rs +++ b/exercises/clippy/clippy2.rs @@ -3,12 +3,12 @@ // Execute `rustlings hint clippy2` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + fn main() { let mut res = 42; let option = Some(12); - for x in option { + if let Some(x) = option { res += x; } println!("{}", res); diff --git a/exercises/clippy/clippy3.rs b/exercises/clippy/clippy3.rs index 5a95f5b8..b887f608 100644 --- a/exercises/clippy/clippy3.rs +++ b/exercises/clippy/clippy3.rs @@ -3,28 +3,26 @@ // Here's a couple more easy Clippy fixes, so you can see its utility. // No hints. -// I AM NOT DONE + #[allow(unused_variables, unused_assignments)] fn main() { let my_option: Option<()> = None; - if my_option.is_none() { - my_option.unwrap(); - } + let my_arr = &[ - -1, -2, -3 + -1, -2, -3, -4, -5, -6 ]; println!("My array! Here it is: {:?}", my_arr); - let my_empty_vec = vec![1, 2, 3, 4, 5].resize(0, 5); + let mut my_empty_vec = vec![1, 2, 3, 4, 5]; + my_empty_vec.clear(); println!("This Vec is empty, see? {:?}", my_empty_vec); let mut value_a = 45; let mut value_b = 66; // Let's swap these two! - value_a = value_b; - value_b = value_a; + std::mem::swap(& mut value_a,& mut value_b); println!("value a: {}; value b: {}", value_a, value_b); } diff --git a/exercises/conversions/as_ref_mut.rs b/exercises/conversions/as_ref_mut.rs index 2ba9e3f0..d8c2b37c 100644 --- a/exercises/conversions/as_ref_mut.rs +++ b/exercises/conversions/as_ref_mut.rs @@ -7,25 +7,26 @@ // Execute `rustlings hint as_ref_mut` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + // Obtain the number of bytes (not characters) in the given argument. // TODO: Add the AsRef trait appropriately as a trait bound. -fn byte_counter(arg: T) -> usize { + +fn byte_counter>(arg: T) -> usize { arg.as_ref().as_bytes().len() } // Obtain the number of characters (not bytes) in the given argument. // TODO: Add the AsRef trait appropriately as a trait bound. -fn char_counter(arg: T) -> usize { +fn char_counter>(arg: T) -> usize { arg.as_ref().chars().count() } // Squares a number using as_mut(). // TODO: Add the appropriate trait bound. -fn num_sq(arg: &mut T) { +fn num_sq>(arg: &mut T) { // TODO: Implement the function body. - ??? + *arg.as_mut() *= *arg.as_mut() } #[cfg(test)] diff --git a/exercises/conversions/from_into.rs b/exercises/conversions/from_into.rs index 60911f3e..2cd20380 100644 --- a/exercises/conversions/from_into.rs +++ b/exercises/conversions/from_into.rs @@ -40,10 +40,27 @@ impl Default for Person { // If while parsing the age, something goes wrong, then return the default of // Person Otherwise, then return an instantiated Person object with the results -// I AM NOT DONE + impl From<&str> for Person { fn from(s: &str) -> Person { + // 空字符串返回默认值 + if s.len() == 0{ + return Person::default(); + } + let params : Vec<&str> = s.split(",").collect(); + if params.len() < 2 || params[0].len() == 0{ + return Person::default(); + } + match params[1].parse::() { + Ok(value) => { + Person{name:params[0].to_string(),age:value} + } + Err(_) => { + Person::default() + } + } + } } diff --git a/exercises/conversions/from_str.rs b/exercises/conversions/from_str.rs index 34472c32..88801534 100644 --- a/exercises/conversions/from_str.rs +++ b/exercises/conversions/from_str.rs @@ -31,7 +31,7 @@ enum ParsePersonError { ParseInt(ParseIntError), } -// I AM NOT DONE + // Steps: // 1. If the length of the provided string is 0, an error should be returned @@ -52,6 +52,24 @@ enum ParsePersonError { impl FromStr for Person { type Err = ParsePersonError; fn from_str(s: &str) -> Result { + if s.len() == 0{ + return Err(ParsePersonError::Empty); + } + let params : Vec<&str> = s.split(",").collect(); + if params.len() != 2{ + return Err(ParsePersonError::BadLen); + } + if params[0].len() == 0{ + return Err(ParsePersonError::NoName); + } + match params[1].parse::() { + Ok(value) => { + Ok(Person{name:params[0].to_string(),age:value}) + } + Err(e) => { + Err(ParsePersonError::ParseInt(e)) + } + } } } diff --git a/exercises/conversions/try_from_into.rs b/exercises/conversions/try_from_into.rs index 32d6ef39..3cc0fb93 100644 --- a/exercises/conversions/try_from_into.rs +++ b/exercises/conversions/try_from_into.rs @@ -9,6 +9,7 @@ // Execute `rustlings hint try_from_into` or use the `hint` watch subcommand for // a hint. +use std::cmp::{max, min}; use std::convert::{TryFrom, TryInto}; #[derive(Debug, PartialEq)] @@ -27,7 +28,7 @@ enum IntoColorError { IntConversion, } -// I AM NOT DONE + // Your task is to complete this implementation and return an Ok result of inner // type Color. You need to create an implementation for a tuple of three @@ -41,6 +42,11 @@ enum IntoColorError { impl TryFrom<(i16, i16, i16)> for Color { type Error = IntoColorError; fn try_from(tuple: (i16, i16, i16)) -> Result { + let (r,g,b) = tuple; + if min(min(r,g),b) < 0 || max(max(r,g),b) > 255{ + return Err(IntoColorError::IntConversion); + } + Ok(Color{red:r as u8,green:g as u8,blue:b as u8}) } } @@ -48,6 +54,11 @@ impl TryFrom<(i16, i16, i16)> for Color { impl TryFrom<[i16; 3]> for Color { type Error = IntoColorError; fn try_from(arr: [i16; 3]) -> Result { + let (r,g,b) = (arr[0],arr[1],arr[2]); + if min(min(r,g),b) < 0 || max(max(r,g),b) > 255{ + return Err(IntoColorError::IntConversion); + } + Ok(Color{red:r as u8,green:g as u8,blue:b as u8}) } } @@ -55,6 +66,14 @@ impl TryFrom<[i16; 3]> for Color { impl TryFrom<&[i16]> for Color { type Error = IntoColorError; fn try_from(slice: &[i16]) -> Result { + if slice.len() != 3{ + return Err(IntoColorError::BadLen); + } + let (r,g,b) = (slice[0],slice[1],slice[2]); + if min(min(r,g),b) < 0 || max(max(r,g),b) > 255{ + return Err(IntoColorError::IntConversion); + } + Ok(Color{red:r as u8,green:g as u8,blue:b as u8}) } } diff --git a/exercises/conversions/using_as.rs b/exercises/conversions/using_as.rs index 414cef3a..f4adc9c8 100644 --- a/exercises/conversions/using_as.rs +++ b/exercises/conversions/using_as.rs @@ -10,11 +10,11 @@ // Execute `rustlings hint using_as` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + fn average(values: &[f64]) -> f64 { let total = values.iter().sum::(); - total / values.len() + total / values.len() as f64 } fn main() { diff --git a/exercises/enums/enums1.rs b/exercises/enums/enums1.rs index 25525b25..85b47ef5 100644 --- a/exercises/enums/enums1.rs +++ b/exercises/enums/enums1.rs @@ -2,11 +2,15 @@ // // 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 df93fe0f..a3a666dd 100644 --- a/exercises/enums/enums2.rs +++ b/exercises/enums/enums2.rs @@ -3,11 +3,15 @@ // 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:i32,y:i32}, + Echo(String), + ChangeColor(i32,i32,i32), + Quit } impl Message { diff --git a/exercises/enums/enums3.rs b/exercises/enums/enums3.rs index 2dcdad06..3d4e9657 100644 --- a/exercises/enums/enums3.rs +++ b/exercises/enums/enums3.rs @@ -5,10 +5,14 @@ // 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), + Move(Point), + Echo(String), + Quit } struct Point { @@ -45,6 +49,20 @@ impl State { // variants // Remember: When passing a tuple as a function argument, you'll need // extra parentheses: fn function((t, u, p, l, e)) + match message { + Message::ChangeColor(r,g,b) =>{ + self.change_color((r,g,b)); + } + Message::Move(p) => { + self.move_position(p); + } + Message::Echo(s) => { + self.echo(s); + } + Message::Quit => { + self.quit(); + } + } } } diff --git a/exercises/error_handling/errors1.rs b/exercises/error_handling/errors1.rs index 0ba59a57..fbb73414 100644 --- a/exercises/error_handling/errors1.rs +++ b/exercises/error_handling/errors1.rs @@ -9,14 +9,14 @@ // Execute `rustlings hint errors1` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE -pub fn generate_nametag_text(name: String) -> Option { + +pub fn generate_nametag_text(name: String) -> Result { if name.is_empty() { // Empty names aren't allowed. - None + Err("`name` was empty; it must be nonempty.".to_string()) } else { - Some(format!("Hi! My name is {}", name)) + Ok(format!("Hi! My name is {}", name).to_string()) } } diff --git a/exercises/error_handling/errors2.rs b/exercises/error_handling/errors2.rs index d4a5477b..2783fb4c 100644 --- a/exercises/error_handling/errors2.rs +++ b/exercises/error_handling/errors2.rs @@ -19,14 +19,14 @@ // Execute `rustlings hint errors2` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + use std::num::ParseIntError; pub fn total_cost(item_quantity: &str) -> Result { let processing_fee = 1; let cost_per_item = 5; - let qty = item_quantity.parse::(); + let qty = item_quantity.parse::()?; Ok(qty * cost_per_item + processing_fee) } diff --git a/exercises/error_handling/errors3.rs b/exercises/error_handling/errors3.rs index d42d3b17..40beeb28 100644 --- a/exercises/error_handling/errors3.rs +++ b/exercises/error_handling/errors3.rs @@ -7,11 +7,11 @@ // Execute `rustlings hint errors3` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE +use std::error::Error; use std::num::ParseIntError; -fn main() { +fn main() -> Result<(),Box> { let mut tokens = 100; let pretend_user_input = "8"; @@ -23,6 +23,7 @@ fn main() { tokens -= cost; println!("You now have {} tokens.", tokens); } + Ok(()) } pub fn total_cost(item_quantity: &str) -> Result { diff --git a/exercises/error_handling/errors4.rs b/exercises/error_handling/errors4.rs index d6d6fcb6..d241db13 100644 --- a/exercises/error_handling/errors4.rs +++ b/exercises/error_handling/errors4.rs @@ -3,7 +3,7 @@ // Execute `rustlings hint errors4` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + #[derive(PartialEq, Debug)] struct PositiveNonzeroInteger(u64); @@ -17,6 +17,12 @@ enum CreationError { impl PositiveNonzeroInteger { fn new(value: i64) -> Result { // Hmm... Why is this always returning an Ok value? + if value < 0{ + return Err(CreationError::Negative); + } + if value == 0{ + return Err(CreationError::Zero); + } Ok(PositiveNonzeroInteger(value as u64)) } } diff --git a/exercises/error_handling/errors5.rs b/exercises/error_handling/errors5.rs index 92461a7e..99f00a82 100644 --- a/exercises/error_handling/errors5.rs +++ b/exercises/error_handling/errors5.rs @@ -22,14 +22,15 @@ // Execute `rustlings hint errors5` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + use std::error; +use std::error::Error; use std::fmt; use std::num::ParseIntError; // TODO: update the return type of `main()` to make this compile. -fn main() -> Result<(), Box> { +fn main() -> Result<(), Box> { let pretend_user_input = "42"; let x: i64 = pretend_user_input.parse()?; println!("output={:?}", PositiveNonzeroInteger::new(x)?); diff --git a/exercises/error_handling/errors6.rs b/exercises/error_handling/errors6.rs index aaf0948e..bc50d0b3 100644 --- a/exercises/error_handling/errors6.rs +++ b/exercises/error_handling/errors6.rs @@ -9,7 +9,7 @@ // Execute `rustlings hint errors6` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + use std::num::ParseIntError; @@ -25,14 +25,19 @@ impl ParsePosNonzeroError { ParsePosNonzeroError::Creation(err) } // TODO: add another error conversion function here. - // fn from_parseint... + fn from_parseint(err : ParseIntError) -> ParsePosNonzeroError{ + ParsePosNonzeroError::ParseInt(err) + } } fn parse_pos_nonzero(s: &str) -> Result { // TODO: change this to return an appropriate error instead of panicking // when `parse()` returns an error. - let x: i64 = s.parse().unwrap(); - PositiveNonzeroInteger::new(x).map_err(ParsePosNonzeroError::from_creation) + match s.parse() { + Ok(x) => PositiveNonzeroInteger::new(x).map_err(ParsePosNonzeroError::from_creation), + Err(err) => Err(ParsePosNonzeroError::from_parseint(err)), + } + } // Don't change anything below this line. diff --git a/exercises/functions/functions1.rs b/exercises/functions/functions1.rs index 40ed9a07..f5b20901 100644 --- a/exercises/functions/functions1.rs +++ b/exercises/functions/functions1.rs @@ -3,7 +3,11 @@ // Execute `rustlings hint functions1` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + + +fn call_me(){ + +} fn main() { call_me(); diff --git a/exercises/functions/functions2.rs b/exercises/functions/functions2.rs index 5154f34d..a02fadc3 100644 --- a/exercises/functions/functions2.rs +++ b/exercises/functions/functions2.rs @@ -3,13 +3,13 @@ // 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 74f44d6d..9203f762 100644 --- a/exercises/functions/functions3.rs +++ b/exercises/functions/functions3.rs @@ -3,10 +3,10 @@ // Execute `rustlings hint functions3` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + fn main() { - call_me(); + call_me(3); } fn call_me(num: u32) { diff --git a/exercises/functions/functions4.rs b/exercises/functions/functions4.rs index 77c4b2aa..104aad9c 100644 --- a/exercises/functions/functions4.rs +++ b/exercises/functions/functions4.rs @@ -8,14 +8,14 @@ // Execute `rustlings hint functions4` or use the `hint` watch subcommand for a // hint. -// 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 f1b63f48..3608bf0f 100644 --- a/exercises/functions/functions5.rs +++ b/exercises/functions/functions5.rs @@ -3,7 +3,7 @@ // Execute `rustlings hint functions5` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + fn main() { let answer = square(3); @@ -11,5 +11,5 @@ fn main() { } fn square(num: i32) -> i32 { - num * num; + num * num } diff --git a/exercises/generics/generics1.rs b/exercises/generics/generics1.rs index 35c1d2fe..2321f732 100644 --- a/exercises/generics/generics1.rs +++ b/exercises/generics/generics1.rs @@ -6,9 +6,9 @@ // Execute `rustlings hint generics1` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + fn main() { - let mut shopping_list: Vec = Vec::new(); + let mut shopping_list: Vec<&str> = Vec::new(); shopping_list.push("milk"); } diff --git a/exercises/generics/generics2.rs b/exercises/generics/generics2.rs index 074cd938..ae12d35d 100644 --- a/exercises/generics/generics2.rs +++ b/exercises/generics/generics2.rs @@ -6,14 +6,14 @@ // Execute `rustlings hint generics2` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE -struct Wrapper { - value: u32, + +struct Wrapper { + value: T, } -impl Wrapper { - pub fn new(value: u32) -> Self { +impl Wrapper { + pub fn new(value: T) -> Self { Wrapper { value } } } diff --git a/exercises/hashmaps/hashmaps1.rs b/exercises/hashmaps/hashmaps1.rs index 80829eaa..52fcbe7a 100644 --- a/exercises/hashmaps/hashmaps1.rs +++ b/exercises/hashmaps/hashmaps1.rs @@ -11,18 +11,19 @@ // 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"), 3); + basket.insert(String::from("pear"), 10); basket } diff --git a/exercises/hashmaps/hashmaps2.rs b/exercises/hashmaps/hashmaps2.rs index a5925690..571c16ae 100644 --- a/exercises/hashmaps/hashmaps2.rs +++ b/exercises/hashmaps/hashmaps2.rs @@ -14,7 +14,7 @@ // Execute `rustlings hint hashmaps2` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + use std::collections::HashMap; @@ -40,6 +40,7 @@ fn fruit_basket(basket: &mut HashMap) { // 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 // already present! + basket.entry(fruit).or_insert(1); } } diff --git a/exercises/hashmaps/hashmaps3.rs b/exercises/hashmaps/hashmaps3.rs index 08e977c3..e6d06ad6 100644 --- a/exercises/hashmaps/hashmaps3.rs +++ b/exercises/hashmaps/hashmaps3.rs @@ -14,7 +14,7 @@ // Execute `rustlings hint hashmaps3` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + use std::collections::HashMap; @@ -39,6 +39,13 @@ fn build_scores_table(results: String) -> HashMap { // 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 // team_1. + let count = scores.entry(team_1_name).or_insert(Team{goals_scored:0,goals_conceded:0}); + count.goals_scored += team_1_score; + count.goals_conceded += team_2_score; + + let count = scores.entry(team_2_name).or_insert(Team{goals_scored:0,goals_conceded:0}); + count.goals_scored += team_2_score; + count.goals_conceded += team_1_score; } scores } diff --git a/exercises/if/if1.rs b/exercises/if/if1.rs index 4734d78f..405ee13a 100644 --- a/exercises/if/if1.rs +++ b/exercises/if/if1.rs @@ -2,13 +2,18 @@ // // 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 f512f13f..e75e4fa7 100644 --- a/exercises/if/if2.rs +++ b/exercises/if/if2.rs @@ -5,13 +5,15 @@ // // 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 { - 1 + } else if fizzish == "fuzz" { + "bar" + }else{ + "baz" } } diff --git a/exercises/if/if3.rs b/exercises/if/if3.rs index 16962740..e24a5b82 100644 --- a/exercises/if/if3.rs +++ b/exercises/if/if3.rs @@ -2,17 +2,17 @@ // // 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 { let identifier = if animal == "crab" { 1 } else if animal == "gopher" { - 2.0 + 2 } else if animal == "snake" { 3 } else { - "Unknown" + 0 }; // DO NOT CHANGE THIS STATEMENT BELOW diff --git a/exercises/intro/intro1.rs b/exercises/intro/intro1.rs index 37fa0112..711cceb7 100644 --- a/exercises/intro/intro1.rs +++ b/exercises/intro/intro1.rs @@ -13,7 +13,7 @@ // Execute `rustlings hint intro1` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + fn main() { println!("Hello and"); diff --git a/exercises/intro/intro2.rs b/exercises/intro/intro2.rs index 990b20f0..3e91b95c 100644 --- a/exercises/intro/intro2.rs +++ b/exercises/intro/intro2.rs @@ -5,8 +5,8 @@ // 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/iterators/iterators1.rs b/exercises/iterators/iterators1.rs index 31076bb9..721b2efa 100644 --- a/exercises/iterators/iterators1.rs +++ b/exercises/iterators/iterators1.rs @@ -9,18 +9,18 @@ // Execute `rustlings hint iterators1` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + #[test] fn main() { 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(), ???); // 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(), ???); // 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(), ???); // TODO: Step 4 + assert_eq!(my_iterable_fav_fruits.next(), None); // TODO: Step 4 } diff --git a/exercises/iterators/iterators2.rs b/exercises/iterators/iterators2.rs index dda82a08..44fc9788 100644 --- a/exercises/iterators/iterators2.rs +++ b/exercises/iterators/iterators2.rs @@ -6,7 +6,7 @@ // Execute `rustlings hint iterators2` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + // Step 1. // Complete the `capitalize_first` function. @@ -15,7 +15,11 @@ pub fn capitalize_first(input: &str) -> String { let mut c = input.chars(); match c.next() { None => String::new(), - Some(first) => ???, + Some(first) => { + let character = first.to_uppercase(); + let remain = c.as_str(); + format!("{}{}",character,remain) + }, } } @@ -24,7 +28,19 @@ pub fn capitalize_first(input: &str) -> String { // Return a vector of strings. // ["hello", "world"] -> ["Hello", "World"] pub fn capitalize_words_vector(words: &[&str]) -> Vec { - vec![] + let mut ret = vec![]; + let mut iter = words.into_iter(); + loop{ + match iter.next() { + Some(&s) => { + ret.push(capitalize_first(s)) + } + None =>{ + break; + } + } + } + ret } // Step 3. @@ -32,7 +48,12 @@ pub fn capitalize_words_vector(words: &[&str]) -> Vec { // Return a single string. // ["hello", " ", "world"] -> "Hello World" pub fn capitalize_words_string(words: &[&str]) -> String { - String::new() + let mut s = String::new(); + let string_list = capitalize_words_vector(words); + for str in string_list{ + s += str.as_str() + }; + s } #[cfg(test)] diff --git a/exercises/iterators/iterators3.rs b/exercises/iterators/iterators3.rs index 29fa23a3..99d43bac 100644 --- a/exercises/iterators/iterators3.rs +++ b/exercises/iterators/iterators3.rs @@ -9,7 +9,7 @@ // Execute `rustlings hint iterators3` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + #[derive(Debug, PartialEq, Eq)] pub enum DivisionError { @@ -26,23 +26,45 @@ pub struct NotDivisibleError { // Calculate `a` divided by `b` if `a` is evenly divisible by `b`. // Otherwise, return a suitable error. pub fn divide(a: i32, b: i32) -> Result { - todo!(); + if b == 0{ + return Err(DivisionError::DivideByZero); + } + if a % b == 0{ + return Ok(a / b); + } + Err(DivisionError::NotDivisible(NotDivisibleError{dividend:a,divisor:b})) } // Complete the function and return a value of the correct type so the test // passes. // Desired output: Ok([1, 11, 1426, 3]) -fn result_with_list() -> () { +fn result_with_list() -> Result,()>{ let numbers = vec![27, 297, 38502, 81]; let division_results = numbers.into_iter().map(|n| divide(n, 27)); + let mut vec = vec![]; + for res in division_results{ + match res { + Ok(val) => vec.push(val), + Err(_) => (), + } + } + Ok(vec) } // Complete the function and return a value of the correct type so the test // passes. // Desired output: [Ok(1), Ok(11), Ok(1426), Ok(3)] -fn list_of_results() -> () { +fn list_of_results() -> Vec> { let numbers = vec![27, 297, 38502, 81]; let division_results = numbers.into_iter().map(|n| divide(n, 27)); + let mut vec = vec![]; + for res in division_results{ + match res { + Ok(val) => vec.push(Ok(val)), + Err(_) => (), + } + } + vec } #[cfg(test)] diff --git a/exercises/iterators/iterators4.rs b/exercises/iterators/iterators4.rs index 79e1692b..3c0add21 100644 --- a/exercises/iterators/iterators4.rs +++ b/exercises/iterators/iterators4.rs @@ -3,7 +3,6 @@ // Execute `rustlings hint iterators4` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE pub fn factorial(num: u64) -> u64 { // Complete this function to return the factorial of num @@ -15,6 +14,7 @@ pub fn factorial(num: u64) -> u64 { // For an extra challenge, don't use: // - recursion // Execute `rustlings hint iterators4` for hints. + (1..num+1).product() } #[cfg(test)] diff --git a/exercises/iterators/iterators5.rs b/exercises/iterators/iterators5.rs index a062ee4c..c0b9c831 100644 --- a/exercises/iterators/iterators5.rs +++ b/exercises/iterators/iterators5.rs @@ -11,7 +11,7 @@ // Execute `rustlings hint iterators5` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + use std::collections::HashMap; @@ -35,7 +35,19 @@ fn count_for(map: &HashMap, value: Progress) -> usize { fn count_iterator(map: &HashMap, value: Progress) -> usize { // map is a hashmap with String keys and Progress values. // map = { "variables1": Complete, "from_str": None, ... } - todo!(); + let mut iter = map.iter(); + let mut count = 0; + loop { + match iter.next() { + Some(item) => { + if item.1 == &value{ + count += 1; + } + } + None => break + } + } + count } fn count_collection_for(collection: &[HashMap], value: Progress) -> usize { @@ -54,7 +66,27 @@ fn count_collection_iterator(collection: &[HashMap], value: Pr // collection is a slice of hashmaps. // collection = [{ "variables1": Complete, "from_str": None, ... }, // { "variables2": Complete, ... }, ... ] - todo!(); + let mut count = 0; + let mut hash_map_iter = collection.iter(); + loop { + match hash_map_iter.next() { + Some(map) => { + let mut iter = map.iter(); + loop { + match iter.next() { + Some(item) => { + if item.1 == &value{ + count += 1; + } + } + None => break + } + } + } + None => break + } + } + count } #[cfg(test)] diff --git a/exercises/lifetimes/lifetimes1.rs b/exercises/lifetimes/lifetimes1.rs index 87bde490..b40fc1c9 100644 --- a/exercises/lifetimes/lifetimes1.rs +++ b/exercises/lifetimes/lifetimes1.rs @@ -8,9 +8,9 @@ // Execute `rustlings hint lifetimes1` or use the `hint` watch subcommand for a // 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() { x } else { diff --git a/exercises/lifetimes/lifetimes2.rs b/exercises/lifetimes/lifetimes2.rs index 4f3d8c18..f459909d 100644 --- a/exercises/lifetimes/lifetimes2.rs +++ b/exercises/lifetimes/lifetimes2.rs @@ -6,7 +6,7 @@ // Execute `rustlings hint lifetimes2` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + fn longest<'a>(x: &'a str, y: &'a str) -> &'a str { if x.len() > y.len() { @@ -19,8 +19,8 @@ fn longest<'a>(x: &'a str, y: &'a str) -> &'a str { fn main() { let string1 = String::from("long string is long"); let result; + let string2 = String::from("xyz"); { - let string2 = String::from("xyz"); result = longest(string1.as_str(), string2.as_str()); } println!("The longest string is '{}'", result); diff --git a/exercises/lifetimes/lifetimes3.rs b/exercises/lifetimes/lifetimes3.rs index 9c59f9c0..7803e6cd 100644 --- a/exercises/lifetimes/lifetimes3.rs +++ b/exercises/lifetimes/lifetimes3.rs @@ -5,11 +5,11 @@ // Execute `rustlings hint lifetimes3` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE -struct Book { - author: &str, - title: &str, + +struct Book<'a> { + author: &'a str, + title: &'a str, } fn main() { diff --git a/exercises/macros/macros1.rs b/exercises/macros/macros1.rs index 678de6ee..eb0cbbaa 100644 --- a/exercises/macros/macros1.rs +++ b/exercises/macros/macros1.rs @@ -3,7 +3,7 @@ // Execute `rustlings hint macros1` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + macro_rules! my_macro { () => { @@ -12,5 +12,5 @@ macro_rules! my_macro { } fn main() { - my_macro(); + my_macro!(); } diff --git a/exercises/macros/macros2.rs b/exercises/macros/macros2.rs index 788fc16a..b823619b 100644 --- a/exercises/macros/macros2.rs +++ b/exercises/macros/macros2.rs @@ -3,14 +3,13 @@ // Execute `rustlings hint macros2` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE - -fn main() { - my_macro!(); -} macro_rules! my_macro { () => { println!("Check out my macro!"); }; } + +fn main() { + my_macro!(); +} diff --git a/exercises/macros/macros3.rs b/exercises/macros/macros3.rs index b795c149..49bcd208 100644 --- a/exercises/macros/macros3.rs +++ b/exercises/macros/macros3.rs @@ -5,8 +5,8 @@ // Execute `rustlings hint macros3` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE +#[macro_use] mod macros { macro_rules! my_macro { () => { diff --git a/exercises/macros/macros4.rs b/exercises/macros/macros4.rs index 71b45a09..856a1916 100644 --- a/exercises/macros/macros4.rs +++ b/exercises/macros/macros4.rs @@ -3,16 +3,16 @@ // Execute `rustlings hint macros4` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + #[rustfmt::skip] macro_rules! my_macro { () => { println!("Check out my macro!"); - } + }; ($val:expr) => { println!("Look at this other macro: {}", $val); - } + }; } fn main() { diff --git a/exercises/modules/modules1.rs b/exercises/modules/modules1.rs index 9eb5a48b..94308b5c 100644 --- a/exercises/modules/modules1.rs +++ b/exercises/modules/modules1.rs @@ -3,7 +3,7 @@ // 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! @@ -11,7 +11,7 @@ mod sausage_factory { 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 04154543..a16b8c99 100644 --- a/exercises/modules/modules2.rs +++ b/exercises/modules/modules2.rs @@ -7,12 +7,12 @@ // 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 f2bb0503..50f59f4e 100644 --- a/exercises/modules/modules3.rs +++ b/exercises/modules/modules3.rs @@ -8,10 +8,11 @@ // 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; +use std::time::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 e0639375..0263b06d 100644 --- a/exercises/move_semantics/move_semantics1.rs +++ b/exercises/move_semantics/move_semantics1.rs @@ -3,7 +3,7 @@ // Execute `rustlings hint move_semantics1` or use the `hint` watch subcommand // for a hint. -// I AM NOT DONE + #[test] fn main() { @@ -15,7 +15,7 @@ fn main() { } fn fill_vec(vec: Vec) -> Vec { - let vec = vec; + let mut vec = vec; vec.push(88); diff --git a/exercises/move_semantics/move_semantics2.rs b/exercises/move_semantics/move_semantics2.rs index baf6bcc9..9de3c77d 100644 --- a/exercises/move_semantics/move_semantics2.rs +++ b/exercises/move_semantics/move_semantics2.rs @@ -5,22 +5,22 @@ // Execute `rustlings hint move_semantics2` or use the `hint` watch subcommand // for a hint. -// I AM NOT DONE + #[test] fn main() { let vec0 = vec![22, 44, 66]; - let mut vec1 = fill_vec(vec0); + let vec1 = fill_vec(vec0.clone()); assert_eq!(vec0, vec![22, 44, 66]); assert_eq!(vec1, vec![22, 44, 66, 88]); } fn fill_vec(vec: Vec) -> Vec { - let mut vec = vec; + let mut vec1 = vec; - vec.push(88); + vec1.push(88); - vec + vec1 } diff --git a/exercises/move_semantics/move_semantics3.rs b/exercises/move_semantics/move_semantics3.rs index 7af9e694..88447ea3 100644 --- a/exercises/move_semantics/move_semantics3.rs +++ b/exercises/move_semantics/move_semantics3.rs @@ -6,18 +6,19 @@ // Execute `rustlings hint move_semantics3` or use the `hint` watch subcommand // for a hint. -// I AM NOT DONE + #[test] fn main() { let vec0 = vec![22, 44, 66]; - let mut vec1 = fill_vec(vec0); + let vec1 = fill_vec(vec0); assert_eq!(vec1, vec![22, 44, 66, 88]); } fn fill_vec(vec: Vec) -> Vec { + let mut vec = vec; vec.push(88); vec diff --git a/exercises/move_semantics/move_semantics4.rs b/exercises/move_semantics/move_semantics4.rs index 80b49dba..b6bb16b0 100644 --- a/exercises/move_semantics/move_semantics4.rs +++ b/exercises/move_semantics/move_semantics4.rs @@ -7,13 +7,13 @@ // Execute `rustlings hint move_semantics4` or use the `hint` watch subcommand // for a hint. -// I AM NOT DONE + #[test] fn main() { let vec0 = vec![22, 44, 66]; - let mut vec1 = fill_vec(vec0); + let mut vec1 = fill_vec(); assert_eq!(vec1, vec![22, 44, 66, 88]); } @@ -21,7 +21,7 @@ fn main() { // `fill_vec()` no longer takes `vec: Vec` as argument - don't change this! fn fill_vec() -> Vec { // 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); diff --git a/exercises/move_semantics/move_semantics5.rs b/exercises/move_semantics/move_semantics5.rs index 267bdccc..91a4474f 100644 --- a/exercises/move_semantics/move_semantics5.rs +++ b/exercises/move_semantics/move_semantics5.rs @@ -6,14 +6,14 @@ // Execute `rustlings hint move_semantics5` or use the `hint` watch subcommand // for a hint. -// I AM NOT DONE + #[test] 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 cace4ca6..ed95067c 100644 --- a/exercises/move_semantics/move_semantics6.rs +++ b/exercises/move_semantics/move_semantics6.rs @@ -5,24 +5,24 @@ // Execute `rustlings hint move_semantics6` or use the `hint` watch subcommand // for a hint. -// I AM NOT DONE + fn main() { let data = "Rust is great!".to_string(); - get_char(data); + get_char(data.as_str()); string_uppercase(&data); } // Should not take ownership -fn get_char(data: String) -> char { +fn get_char(data: &str) -> char { data.chars().last().unwrap() } // Should take ownership fn string_uppercase(mut data: &String) { - data = &data.to_uppercase(); + let data = &data.to_uppercase(); println!("{}", data); } diff --git a/exercises/options/options1.rs b/exercises/options/options1.rs index e131b48b..3d268c30 100644 --- a/exercises/options/options1.rs +++ b/exercises/options/options1.rs @@ -3,7 +3,7 @@ // Execute `rustlings hint options1` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + // 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 @@ -13,7 +13,13 @@ fn maybe_icecream(time_of_day: u16) -> Option { // value of 0 The Option output should gracefully handle cases where // time_of_day > 23. // TODO: Complete the function body - remember to return an Option! - ??? + if time_of_day > 23 { + None + }else if time_of_day < 22{ + Some(5) + }else{ + Some(0) + } } #[cfg(test)] @@ -34,6 +40,6 @@ mod tests { // TODO: Fix this test. How do you get at the value contained in the // Option? let icecreams = maybe_icecream(12); - assert_eq!(icecreams, 5); + assert_eq!(icecreams, Some(5)); } } diff --git a/exercises/options/options2.rs b/exercises/options/options2.rs index 4d998e7d..9e365eab 100644 --- a/exercises/options/options2.rs +++ b/exercises/options/options2.rs @@ -3,7 +3,7 @@ // Execute `rustlings hint options2` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + #[cfg(test)] mod tests { @@ -13,7 +13,7 @@ mod tests { let optional_target = Some(target); // TODO: Make this an if let statement whose value is "Some" type - word = optional_target { + if let word = optional_target.unwrap() { assert_eq!(word, target); } } @@ -32,7 +32,7 @@ mod tests { // TODO: make this a while let statement - remember that vector.pop also // adds another layer of Option. You can stack `Option`s into // while let and if let. - integer = optional_integers.pop() { + while let Some(integer) = optional_integers.pop().unwrap() { assert_eq!(integer, cursor); cursor -= 1; } diff --git a/exercises/options/options3.rs b/exercises/options/options3.rs index 23c15eab..75af35d9 100644 --- a/exercises/options/options3.rs +++ b/exercises/options/options3.rs @@ -3,7 +3,7 @@ // Execute `rustlings hint options3` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + struct Point { x: i32, @@ -13,7 +13,7 @@ struct Point { fn main() { let y: Option = Some(Point { x: 100, y: 200 }); - match y { + match &y { Some(p) => println!("Co-ordinates are {},{} ", p.x, p.y), _ => panic!("no match!"), } diff --git a/exercises/primitive_types/primitive_types1.rs b/exercises/primitive_types/primitive_types1.rs index 36633400..724f3a70 100644 --- a/exercises/primitive_types/primitive_types1.rs +++ b/exercises/primitive_types/primitive_types1.rs @@ -3,7 +3,7 @@ // 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`) @@ -13,7 +13,7 @@ fn main() { println!("Good morning!"); } - let // Finish the rest of this line like the example! Or make it be false! + let is_evening = true; // 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 f1616ed3..994e9426 100644 --- a/exercises/primitive_types/primitive_types2.rs +++ b/exercises/primitive_types/primitive_types2.rs @@ -3,7 +3,7 @@ // 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`) @@ -19,7 +19,7 @@ fn main() { println!("Neither alphabetic nor numeric!"); } - let // Finish this line like the example! What's your favorite character? + let your_character = '2'; // 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 8b0de44e..f4d80a6d 100644 --- a/exercises/primitive_types/primitive_types3.rs +++ b/exercises/primitive_types/primitive_types3.rs @@ -5,10 +5,10 @@ // Execute `rustlings hint primitive_types3` or use the `hint` watch subcommand // for a hint. -// I AM NOT DONE + fn main() { - let a = ??? + let a = [0;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 d44d8776..d8bab81f 100644 --- a/exercises/primitive_types/primitive_types4.rs +++ b/exercises/primitive_types/primitive_types4.rs @@ -5,13 +5,13 @@ // 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 f646986e..5e15b324 100644 --- a/exercises/primitive_types/primitive_types5.rs +++ b/exercises/primitive_types/primitive_types5.rs @@ -5,11 +5,11 @@ // 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)/* your pattern here */ = cat; println!("{} is {} years old.", name, age); } diff --git a/exercises/primitive_types/primitive_types6.rs b/exercises/primitive_types/primitive_types6.rs index 07cc46c6..0b71526f 100644 --- a/exercises/primitive_types/primitive_types6.rs +++ b/exercises/primitive_types/primitive_types6.rs @@ -6,13 +6,13 @@ // 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 4ee5ada7..aa77490f 100644 --- a/exercises/quiz1.rs +++ b/exercises/quiz1.rs @@ -13,10 +13,16 @@ // // No hints this time ;) -// I AM NOT DONE + // Put your function here! -// fn calculate_price_of_apples { +fn calculate_price_of_apples(num:i32) -> i32 { + if num > 40{ + num + }else{ + 2 * num + } +} // Don't modify this function! #[test] diff --git a/exercises/quiz2.rs b/exercises/quiz2.rs index 29925caf..fc298b58 100644 --- a/exercises/quiz2.rs +++ b/exercises/quiz2.rs @@ -20,7 +20,6 @@ // // No hints this time! -// I AM NOT DONE pub enum Command { Uppercase, @@ -29,14 +28,20 @@ pub enum Command { } mod my_module { + use std::ops::Add; 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! + match command { + &Command::Trim => output.push(string.trim().to_string()), + &Command::Uppercase => output.push(string.to_uppercase()), + &Command::Append(size) => output.push(string.to_owned() + &"bar".repeat(size)) + } } output } @@ -45,7 +50,7 @@ mod my_module { #[cfg(test)] mod tests { // TODO: What do we need to import to have `transformer` in scope? - use ???; + use super::my_module::transformer; use super::Command; #[test] diff --git a/exercises/quiz3.rs b/exercises/quiz3.rs index 3b01d313..85620e32 100644 --- a/exercises/quiz3.rs +++ b/exercises/quiz3.rs @@ -16,15 +16,17 @@ // // Execute `rustlings hint quiz3` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE -pub struct ReportCard { - pub grade: f32, + +use std::fmt::Display; + +pub struct ReportCard { + pub grade: T, pub student_name: String, pub student_age: u8, } -impl ReportCard { +impl ReportCard { pub fn print(&self) -> String { format!("{} ({}) - achieved a grade of {}", &self.student_name, &self.student_age, &self.grade) @@ -52,7 +54,7 @@ mod tests { fn generate_alphabetic_report_card() { // TODO: Make sure to change the grade here after you finish the exercise. let report_card = ReportCard { - grade: 2.1, + grade: "A+", student_name: "Gary Plotter".to_string(), student_age: 11, }; diff --git a/exercises/smart_pointers/arc1.rs b/exercises/smart_pointers/arc1.rs index 3526ddcb..0b1f535d 100644 --- a/exercises/smart_pointers/arc1.rs +++ b/exercises/smart_pointers/arc1.rs @@ -21,7 +21,7 @@ // // Execute `rustlings hint arc1` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE + #![forbid(unused_imports)] // Do not change this, (or the next) line. use std::sync::Arc; @@ -29,11 +29,11 @@ use std::thread; fn main() { let numbers: Vec<_> = (0..100u32).collect(); - let shared_numbers = // TODO + let shared_numbers = Arc::new(numbers);// TODO let mut joinhandles = Vec::new(); for offset in 0..8 { - let child_numbers = // TODO + let child_numbers = Arc::clone(&shared_numbers);// TODO joinhandles.push(thread::spawn(move || { let sum: u32 = child_numbers.iter().filter(|&&n| n % 8 == offset).sum(); println!("Sum of offset {} is {}", offset, sum); diff --git a/exercises/smart_pointers/box1.rs b/exercises/smart_pointers/box1.rs index 513e7daa..e068f2be 100644 --- a/exercises/smart_pointers/box1.rs +++ b/exercises/smart_pointers/box1.rs @@ -18,11 +18,11 @@ // // Execute `rustlings hint box1` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE + #[derive(PartialEq, Debug)] pub enum List { - Cons(i32, List), + Cons(i32, Box), Nil, } @@ -35,11 +35,11 @@ fn main() { } pub fn create_empty_list() -> List { - todo!() + List::Nil } pub fn create_non_empty_list() -> List { - todo!() + List::Cons(1,Box::new(List::Nil)) } #[cfg(test)] diff --git a/exercises/smart_pointers/cow1.rs b/exercises/smart_pointers/cow1.rs index fcd3e0bb..bc2bdb3d 100644 --- a/exercises/smart_pointers/cow1.rs +++ b/exercises/smart_pointers/cow1.rs @@ -12,7 +12,7 @@ // // Execute `rustlings hint cow1` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE + use std::borrow::Cow; @@ -49,6 +49,8 @@ mod tests { let mut input = Cow::from(&slice[..]); match abs_all(&mut input) { // TODO + Cow::Owned(_) => Err("Expected not owned value"), + _ => Ok(()), } } @@ -61,6 +63,8 @@ mod tests { let mut input = Cow::from(slice); match abs_all(&mut input) { // TODO + Cow::Owned(_) => Ok(()), + _ => Err("Expected owned value"), } } @@ -73,6 +77,8 @@ mod tests { let mut input = Cow::from(slice); match abs_all(&mut input) { // TODO + Cow::Owned(_) => Ok(()), + _ => Err("Expected owned value"), } } } diff --git a/exercises/smart_pointers/rc1.rs b/exercises/smart_pointers/rc1.rs index 1b903469..37be5171 100644 --- a/exercises/smart_pointers/rc1.rs +++ b/exercises/smart_pointers/rc1.rs @@ -10,7 +10,7 @@ // // Execute `rustlings hint rc1` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE + use std::rc::Rc; @@ -61,17 +61,17 @@ fn main() { jupiter.details(); // TODO - let saturn = Planet::Saturn(Rc::new(Sun {})); + let saturn = Planet::Saturn(Rc::clone(&sun)); println!("reference count = {}", Rc::strong_count(&sun)); // 7 references saturn.details(); // TODO - let uranus = Planet::Uranus(Rc::new(Sun {})); + let uranus = Planet::Uranus(Rc::clone(&sun)); println!("reference count = {}", Rc::strong_count(&sun)); // 8 references uranus.details(); // TODO - let neptune = Planet::Neptune(Rc::new(Sun {})); + let neptune = Planet::Neptune(Rc::clone(&sun)); println!("reference count = {}", Rc::strong_count(&sun)); // 9 references neptune.details(); @@ -83,7 +83,7 @@ fn main() { drop(uranus); println!("reference count = {}", Rc::strong_count(&sun)); // 7 references - drop(saturn); + drop(earth); println!("reference count = {}", Rc::strong_count(&sun)); // 6 references drop(jupiter); @@ -93,12 +93,15 @@ fn main() { println!("reference count = {}", Rc::strong_count(&sun)); // 4 references // TODO + drop(saturn); println!("reference count = {}", Rc::strong_count(&sun)); // 3 references // TODO + drop(venus); println!("reference count = {}", Rc::strong_count(&sun)); // 2 references // TODO + drop(mercury); println!("reference count = {}", Rc::strong_count(&sun)); // 1 reference assert_eq!(Rc::strong_count(&sun), 1); diff --git a/exercises/strings/strings1.rs b/exercises/strings/strings1.rs index f50e1fa9..b8e968ee 100644 --- a/exercises/strings/strings1.rs +++ b/exercises/strings/strings1.rs @@ -5,7 +5,7 @@ // Execute `rustlings hint strings1` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + fn main() { let answer = current_favorite_color(); @@ -13,5 +13,5 @@ fn main() { } fn current_favorite_color() -> String { - "blue" + "blue".to_string() } diff --git a/exercises/strings/strings2.rs b/exercises/strings/strings2.rs index 4d95d16a..81cb0bac 100644 --- a/exercises/strings/strings2.rs +++ b/exercises/strings/strings2.rs @@ -5,11 +5,11 @@ // 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 b29f9325..e170fbd4 100644 --- a/exercises/strings/strings3.rs +++ b/exercises/strings/strings3.rs @@ -3,21 +3,21 @@ // 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! - ??? + input.to_string() + " world!" } 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 e8c54acc..04c51428 100644 --- a/exercises/strings/strings4.rs +++ b/exercises/strings/strings4.rs @@ -7,7 +7,7 @@ // // No hints this time! -// I AM NOT DONE + fn string_slice(arg: &str) { println!("{}", arg); @@ -17,14 +17,14 @@ 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 5fa5821c..bbe4b70a 100644 --- a/exercises/structs/structs1.rs +++ b/exercises/structs/structs1.rs @@ -5,13 +5,16 @@ // Execute `rustlings hint structs1` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + struct ColorClassicStruct { // TODO: Something goes here + red:i32, + green:i32, + blue:i32 } -struct ColorTupleStruct(/* TODO: Something goes here */); +struct ColorTupleStruct(/* TODO: Something goes here */ i32,i32,i32); #[derive(Debug)] struct UnitLikeStruct; @@ -23,7 +26,11 @@ 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); @@ -33,7 +40,7 @@ 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); @@ -43,7 +50,7 @@ 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 328567f0..40e18801 100644 --- a/exercises/structs/structs2.rs +++ b/exercises/structs/structs2.rs @@ -5,7 +5,7 @@ // Execute `rustlings hint structs2` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + #[derive(Debug)] struct Order { @@ -38,7 +38,11 @@ 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 7cda5af1..26fb6258 100644 --- a/exercises/structs/structs3.rs +++ b/exercises/structs/structs3.rs @@ -7,7 +7,7 @@ // Execute `rustlings hint structs3` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + #[derive(Debug)] struct Package { @@ -31,12 +31,14 @@ impl Package { } } - fn is_international(&self) -> ??? { + fn is_international(&self) -> bool { // Something goes here... + self.sender_country != self.recipient_country } - 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 } } diff --git a/exercises/tests/tests1.rs b/exercises/tests/tests1.rs index 810277ac..1f07b408 100644 --- a/exercises/tests/tests1.rs +++ b/exercises/tests/tests1.rs @@ -10,12 +10,12 @@ // Execute `rustlings hint tests1` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + #[cfg(test)] mod tests { #[test] fn you_can_assert() { - assert!(); + assert!(true); } } diff --git a/exercises/tests/tests2.rs b/exercises/tests/tests2.rs index f8024e9f..402d55ba 100644 --- a/exercises/tests/tests2.rs +++ b/exercises/tests/tests2.rs @@ -6,12 +6,12 @@ // Execute `rustlings hint tests2` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + #[cfg(test)] mod tests { #[test] fn you_can_assert_eq() { - assert_eq!(); + assert_eq!(1,1); } } diff --git a/exercises/tests/tests3.rs b/exercises/tests/tests3.rs index 4013e384..5f21d65d 100644 --- a/exercises/tests/tests3.rs +++ b/exercises/tests/tests3.rs @@ -7,7 +7,7 @@ // Execute `rustlings hint tests3` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + pub fn is_even(num: i32) -> bool { num % 2 == 0 @@ -19,11 +19,11 @@ mod tests { #[test] fn is_true_when_even() { - assert!(); + assert!(is_even(2)); } #[test] fn is_false_when_odd() { - assert!(); + assert!(!is_even(1)); } } diff --git a/exercises/tests/tests4.rs b/exercises/tests/tests4.rs index 935d0db1..616b8417 100644 --- a/exercises/tests/tests4.rs +++ b/exercises/tests/tests4.rs @@ -5,7 +5,7 @@ // Execute `rustlings hint tests4` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + struct Rectangle { width: i32, @@ -30,19 +30,20 @@ mod tests { fn correct_width_and_height() { // This test should check if the rectangle is the size that we pass into its constructor let rect = Rectangle::new(10, 20); - assert_eq!(???, 10); // check width - assert_eq!(???, 20); // check height + assert_eq!(rect.width, 10); // check width + assert_eq!(rect.height, 20); // check height } #[test] fn negative_width() { // This test should check if program panics when we try to create rectangle with negative width - let _rect = Rectangle::new(-10, 10); + assert!(std::panic::catch_unwind(|| Rectangle::new(-10, 10)).is_err()) + } #[test] fn negative_height() { // This test should check if program panics when we try to create rectangle with negative height - let _rect = Rectangle::new(10, -10); + assert!(std::panic::catch_unwind(|| Rectangle::new(10, -10)).is_err()) } } diff --git a/exercises/threads/threads1.rs b/exercises/threads/threads1.rs index 80b6def3..2f8d15a0 100644 --- a/exercises/threads/threads1.rs +++ b/exercises/threads/threads1.rs @@ -8,7 +8,7 @@ // Execute `rustlings hint threads1` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + use std::thread; use std::time::{Duration, Instant}; @@ -27,6 +27,7 @@ fn main() { let mut results: Vec = vec![]; for handle in handles { // TODO: a struct is returned from thread::spawn, can you use it? + results.push(handle.join().unwrap()); } if results.len() != 10 { diff --git a/exercises/threads/threads2.rs b/exercises/threads/threads2.rs index 62dad80d..77de09cb 100644 --- a/exercises/threads/threads2.rs +++ b/exercises/threads/threads2.rs @@ -7,9 +7,9 @@ // Execute `rustlings hint threads2` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE -use std::sync::Arc; + +use std::sync::{Arc, Mutex}; use std::thread; use std::time::Duration; @@ -18,14 +18,14 @@ struct JobStatus { } fn main() { - let status = Arc::new(JobStatus { jobs_completed: 0 }); + let status = Arc::new(Mutex::new(JobStatus { jobs_completed: 0 })); let mut handles = vec![]; for _ in 0..10 { let status_shared = Arc::clone(&status); let handle = thread::spawn(move || { thread::sleep(Duration::from_millis(250)); // TODO: You must take an action before you update a shared value - status_shared.jobs_completed += 1; + status_shared.lock().unwrap().jobs_completed += 1; }); handles.push(handle); } @@ -34,6 +34,6 @@ fn main() { // TODO: Print the value of the JobStatus.jobs_completed. Did you notice // anything interesting in the output? Do you have to 'join' on all the // handles? - println!("jobs completed {}", ???); + println!("jobs completed {}", status.lock().unwrap().jobs_completed); } } diff --git a/exercises/threads/threads3.rs b/exercises/threads/threads3.rs index 91006bbc..df7673c5 100644 --- a/exercises/threads/threads3.rs +++ b/exercises/threads/threads3.rs @@ -3,7 +3,7 @@ // Execute `rustlings hint threads3` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + use std::sync::mpsc; use std::sync::Arc; @@ -30,6 +30,7 @@ fn send_tx(q: Queue, tx: mpsc::Sender) -> () { let qc = Arc::new(q); let qc1 = Arc::clone(&qc); let qc2 = Arc::clone(&qc); + let tx1 = mpsc::Sender::clone(&tx); thread::spawn(move || { for val in &qc1.first_half { @@ -42,7 +43,7 @@ fn send_tx(q: Queue, tx: mpsc::Sender) -> () { thread::spawn(move || { for val in &qc2.second_half { println!("sending {:?}", val); - tx.send(*val).unwrap(); + tx1.send(*val).unwrap(); thread::sleep(Duration::from_secs(1)); } }); diff --git a/exercises/traits/traits1.rs b/exercises/traits/traits1.rs index 37dfcbfe..bb36133e 100644 --- a/exercises/traits/traits1.rs +++ b/exercises/traits/traits1.rs @@ -7,7 +7,7 @@ // Execute `rustlings hint traits1` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + trait AppendBar { fn append_bar(self) -> Self; @@ -15,6 +15,9 @@ trait AppendBar { impl AppendBar for String { // TODO: Implement `AppendBar` for type `String`. + fn append_bar(self) -> Self { + self + "Bar" + } } fn main() { diff --git a/exercises/traits/traits2.rs b/exercises/traits/traits2.rs index 3e35f8e1..ee0c5db7 100644 --- a/exercises/traits/traits2.rs +++ b/exercises/traits/traits2.rs @@ -8,7 +8,7 @@ // // Execute `rustlings hint traits2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE + trait AppendBar { fn append_bar(self) -> Self; @@ -16,6 +16,13 @@ trait AppendBar { // TODO: Implement trait `AppendBar` for a vector of strings. +impl AppendBar for Vec { + fn append_bar(mut self) -> Self { + self.push(String::from("Bar")); + self + } +} + #[cfg(test)] mod tests { use super::*; diff --git a/exercises/traits/traits3.rs b/exercises/traits/traits3.rs index 4e2b06b0..1970f44b 100644 --- a/exercises/traits/traits3.rs +++ b/exercises/traits/traits3.rs @@ -8,10 +8,12 @@ // Execute `rustlings hint traits3` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + pub trait Licensed { - fn licensing_info(&self) -> String; + fn licensing_info(&self) -> String{ + String::from("Some information") + } } struct SomeSoftware { diff --git a/exercises/traits/traits4.rs b/exercises/traits/traits4.rs index 4bda3e57..569b26ad 100644 --- a/exercises/traits/traits4.rs +++ b/exercises/traits/traits4.rs @@ -7,7 +7,7 @@ // Execute `rustlings hint traits4` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + pub trait Licensed { fn licensing_info(&self) -> String { @@ -23,7 +23,7 @@ impl Licensed for SomeSoftware {} impl Licensed for OtherSoftware {} // YOU MAY ONLY CHANGE THE NEXT LINE -fn compare_license_types(software: ??, software_two: ??) -> bool { +fn compare_license_types(software: T, software_two: V) -> bool { software.licensing_info() == software_two.licensing_info() } diff --git a/exercises/traits/traits5.rs b/exercises/traits/traits5.rs index df183805..90a155cd 100644 --- a/exercises/traits/traits5.rs +++ b/exercises/traits/traits5.rs @@ -7,7 +7,7 @@ // Execute `rustlings hint traits5` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + pub trait SomeTrait { fn some_function(&self) -> bool { @@ -30,7 +30,7 @@ impl SomeTrait for OtherStruct {} impl OtherTrait for OtherStruct {} // YOU MAY ONLY CHANGE THE NEXT LINE -fn some_func(item: ??) -> bool { +fn some_func(item: T) -> bool { item.some_function() && item.other_function() } diff --git a/exercises/variables/variables1.rs b/exercises/variables/variables1.rs index b3e089a5..1ec79c10 100644 --- a/exercises/variables/variables1.rs +++ b/exercises/variables/variables1.rs @@ -5,9 +5,9 @@ // 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 e1c23edf..08fd874c 100644 --- a/exercises/variables/variables2.rs +++ b/exercises/variables/variables2.rs @@ -3,10 +3,10 @@ // Execute `rustlings hint variables2` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE + fn main() { - let x; + let x = 10; if x == 10 { println!("x is ten!"); } else { diff --git a/exercises/variables/variables3.rs b/exercises/variables/variables3.rs index 86bed419..50cbe0f4 100644 --- a/exercises/variables/variables3.rs +++ b/exercises/variables/variables3.rs @@ -3,9 +3,8 @@ // Execute `rustlings hint variables3` or use the `hint` watch subcommand for a // hint. -// I AM NOT DONE fn main() { - let x: i32; + let x: i32 = 0; println!("Number {}", x); } diff --git a/exercises/variables/variables4.rs b/exercises/variables/variables4.rs index 5394f394..2d056da9 100644 --- a/exercises/variables/variables4.rs +++ b/exercises/variables/variables4.rs @@ -3,10 +3,9 @@ // 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 a29b38be..e1931b72 100644 --- a/exercises/variables/variables5.rs +++ b/exercises/variables/variables5.rs @@ -3,11 +3,11 @@ // 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 853183ba..b0ee45e9 100644 --- a/exercises/variables/variables6.rs +++ b/exercises/variables/variables6.rs @@ -3,9 +3,9 @@ // 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 65b7a7f8..3044e3c7 100644 --- a/exercises/vecs/vecs1.rs +++ b/exercises/vecs/vecs1.rs @@ -7,11 +7,11 @@ // // 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 = a.to_vec();// 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 e92c970a..4070f4f0 100644 --- a/exercises/vecs/vecs2.rs +++ b/exercises/vecs/vecs2.rs @@ -7,13 +7,13 @@ // // 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 element in v.iter_mut() { // TODO: Fill this up so that each element in the Vec `v` is // multiplied by 2. - ??? + *element *= 2; } // At this point, `v` should be equal to [4, 8, 12, 16, 20]. @@ -24,7 +24,7 @@ fn vec_map(v: &Vec) -> Vec { v.iter().map(|element| { // TODO: Do the same thing as above - but instead of mutating the // Vec, you can just return the new number! - ??? + element * 2 }).collect() }