chore: bump version

doc: update changelog
doc: add zulip link
2025-12-26 00:11:49 +02:00 · 2022-08-16 09:54:25 +02:00 · 2022-08-16 09:53:40 +02:00 · 2022-08-16 09:41:41 +02:00 · 2022-08-16 09:37:39 +02:00 · 2022-08-16 09:37:34 +02:00
20 changed files with 400 additions and 37 deletions
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -1371,6 +1371,132 @@
      "contributions": [
        "content"
      ]
+    },
+    {
+      "login": "wojexe",
+      "name": "wojexe",
+      "avatar_url": "https://avatars.githubusercontent.com/u/21208490?v=4",
+      "profile": "https://wojexe.com",
+      "contributions": [
+        "content"
+      ]
+    },
+    {
+      "login": "Tostapunk",
+      "name": "Mattia Schiavon",
+      "avatar_url": "https://avatars.githubusercontent.com/u/25140297?v=4",
+      "profile": "https://github.com/Tostapunk",
+      "contributions": [
+        "content"
+      ]
+    },
+    {
+      "login": "PrettyWood",
+      "name": "Eric Jolibois",
+      "avatar_url": "https://avatars.githubusercontent.com/u/18406791?v=4",
+      "profile": "http://toucantoco.com",
+      "contributions": [
+        "content"
+      ]
+    },
+    {
+      "login": "EdwinChang24",
+      "name": "Edwin Chang",
+      "avatar_url": "https://avatars.githubusercontent.com/u/88263098?v=4",
+      "profile": "http://edwinchang.vercel.app",
+      "contributions": [
+        "content"
+      ]
+    },
+    {
+      "login": "saikatdas0790",
+      "name": "Saikat Das",
+      "avatar_url": "https://avatars.githubusercontent.com/u/7412443?v=4",
+      "profile": "https://saikat.dev/",
+      "contributions": [
+        "content"
+      ]
+    },
+    {
+      "login": "thatlittleboy",
+      "name": "Jeremy Goh",
+      "avatar_url": "https://avatars.githubusercontent.com/u/30731072?v=4",
+      "profile": "https://github.com/thatlittleboy",
+      "contributions": [
+        "content"
+      ]
+    },
+    {
+      "login": "Lioness100",
+      "name": "Lioness100",
+      "avatar_url": "https://avatars.githubusercontent.com/u/65814829?v=4",
+      "profile": "https://github.com/Lioness100",
+      "contributions": [
+        "content"
+      ]
+    },
+    {
+      "login": "tvkn",
+      "name": "Tristan Nicholls",
+      "avatar_url": "https://avatars.githubusercontent.com/u/79277926?v=4",
+      "profile": "https://github.com/tvkn",
+      "contributions": [
+        "content"
+      ]
+    },
+    {
+      "login": "clairew",
+      "name": "Claire",
+      "avatar_url": "https://avatars.githubusercontent.com/u/9344258?v=4",
+      "profile": "http://clairewang.net",
+      "contributions": [
+        "content"
+      ]
+    },
+    {
+      "login": "Mouwrice",
+      "name": "Maurice Van Wassenhove",
+      "avatar_url": "https://avatars.githubusercontent.com/u/56763273?v=4",
+      "profile": "https://github.com/Mouwrice",
+      "contributions": [
+        "content"
+      ]
+    },
+    {
+      "login": "johnmendel",
+      "name": "John Mendelewski",
+      "avatar_url": "https://avatars.githubusercontent.com/u/77524?v=4",
+      "profile": "http://jmthree.com",
+      "contributions": [
+        "code"
+      ]
+    },
+    {
+      "login": "brianfakhoury",
+      "name": "Brian Fakhoury",
+      "avatar_url": "https://avatars.githubusercontent.com/u/20828724?v=4",
+      "profile": "http://fakhoury.xyz",
+      "contributions": [
+        "content"
+      ]
+    },
+    {
+      "login": "markusboehme",
+      "name": "Markus Boehme",
+      "avatar_url": "https://avatars.githubusercontent.com/u/5074759?v=4",
+      "profile": "https://github.com/markusboehme",
+      "contributions": [
+        "code"
+      ]
+    },
+    {
+      "login": "nico-vromans",
+      "name": "Nico Vromans",
+      "avatar_url": "https://avatars.githubusercontent.com/u/48183857?v=4",
+      "profile": "https://github.com/nico-vromans",
+      "contributions": [
+        "content"
+      ]
    }
  ],
  "contributorsPerLine": 8,
--- a/.editorconfig
+++ b/.editorconfig
@@ -2,6 +2,6 @@ root = true

 [*.rs]
 end_of_line = lf
-insert_final_newfile = true
+insert_final_newline = true
 indent_style = space
 indent_size = 4
--- a/AUTHORS.md
+++ b/AUTHORS.md
@@ -195,6 +195,24 @@ authors.
    <td align="center"><a href="https://jamesabromley.wordpress.com/"><img src="https://avatars.githubusercontent.com/u/2474334?v=4?s=100" width="100px;" alt=""/><br /><sub><b>James Bromley</b></sub></a><br /><a href="#content-jayber" title="Content">🖋</a></td>
    <td align="center"><a href="https://github.com/swhiteCQC"><img src="https://avatars.githubusercontent.com/u/77438466?v=4?s=100" width="100px;" alt=""/><br /><sub><b>swhiteCQC</b></sub></a><br /><a href="#content-swhiteCQC" title="Content">🖋</a></td>
    <td align="center"><a href="https://github.com/neilpate"><img src="https://avatars.githubusercontent.com/u/7802334?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Neil Pate</b></sub></a><br /><a href="#content-neilpate" title="Content">🖋</a></td>
+    <td align="center"><a href="https://wojexe.com"><img src="https://avatars.githubusercontent.com/u/21208490?v=4?s=100" width="100px;" alt=""/><br /><sub><b>wojexe</b></sub></a><br /><a href="#content-wojexe" title="Content">🖋</a></td>
+    <td align="center"><a href="https://github.com/Tostapunk"><img src="https://avatars.githubusercontent.com/u/25140297?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Mattia Schiavon</b></sub></a><br /><a href="#content-Tostapunk" title="Content">🖋</a></td>
+    <td align="center"><a href="http://toucantoco.com"><img src="https://avatars.githubusercontent.com/u/18406791?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Eric Jolibois</b></sub></a><br /><a href="#content-PrettyWood" title="Content">🖋</a></td>
+  </tr>
+  <tr>
+    <td align="center"><a href="http://edwinchang.vercel.app"><img src="https://avatars.githubusercontent.com/u/88263098?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Edwin Chang</b></sub></a><br /><a href="#content-EdwinChang24" title="Content">🖋</a></td>
+    <td align="center"><a href="https://saikat.dev/"><img src="https://avatars.githubusercontent.com/u/7412443?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Saikat Das</b></sub></a><br /><a href="#content-saikatdas0790" title="Content">🖋</a></td>
+    <td align="center"><a href="https://github.com/thatlittleboy"><img src="https://avatars.githubusercontent.com/u/30731072?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Jeremy Goh</b></sub></a><br /><a href="#content-thatlittleboy" title="Content">🖋</a></td>
+    <td align="center"><a href="https://github.com/Lioness100"><img src="https://avatars.githubusercontent.com/u/65814829?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Lioness100</b></sub></a><br /><a href="#content-Lioness100" title="Content">🖋</a></td>
+    <td align="center"><a href="https://github.com/tvkn"><img src="https://avatars.githubusercontent.com/u/79277926?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Tristan Nicholls</b></sub></a><br /><a href="#content-tvkn" title="Content">🖋</a></td>
+    <td align="center"><a href="http://clairewang.net"><img src="https://avatars.githubusercontent.com/u/9344258?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Claire</b></sub></a><br /><a href="#content-clairew" title="Content">🖋</a></td>
+    <td align="center"><a href="https://github.com/Mouwrice"><img src="https://avatars.githubusercontent.com/u/56763273?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Maurice Van Wassenhove</b></sub></a><br /><a href="#content-Mouwrice" title="Content">🖋</a></td>
+    <td align="center"><a href="http://jmthree.com"><img src="https://avatars.githubusercontent.com/u/77524?v=4?s=100" width="100px;" alt=""/><br /><sub><b>John Mendelewski</b></sub></a><br /><a href="https://github.com/rust-lang/rustlings/commits?author=johnmendel" title="Code">💻</a></td>
+  </tr>
+  <tr>
+    <td align="center"><a href="http://fakhoury.xyz"><img src="https://avatars.githubusercontent.com/u/20828724?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Brian Fakhoury</b></sub></a><br /><a href="#content-brianfakhoury" title="Content">🖋</a></td>
+    <td align="center"><a href="https://github.com/markusboehme"><img src="https://avatars.githubusercontent.com/u/5074759?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Markus Boehme</b></sub></a><br /><a href="https://github.com/rust-lang/rustlings/commits?author=markusboehme" title="Code">💻</a></td>
+    <td align="center"><a href="https://github.com/nico-vromans"><img src="https://avatars.githubusercontent.com/u/48183857?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Nico Vromans</b></sub></a><br /><a href="#content-nico-vromans" title="Content">🖋</a></td>
  </tr>
 </table>

--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,38 @@
+<a name="5.1.0"></a>
+## 5.1.0 (2022-08-16)
+
+#### Features
+
+- Added a new `rc1` exercise.
+- Added a new `cow1` exercise.
+
+#### Bug Fixes
+
+- **variables5**: Corrected reference to previous exercise
+- **functions4**: Fixed line number reference
+- **strings3**: Clarified comment wording
+- **traits4, traits5**: Fixed line number reference
+- **traits5**:
+  - Fixed typo in "parameter"
+  - Made exercise prefer a traits-based solution
+- **lifetimes2**: Improved hint
+- **threads3**: Fixed typo in hint
+- **box1**: Replaced `unimplemented!` with `todo!`
+- **errors5**: Provided an explanation for usage of `Box<dyn Error>`
+- **quiz2**: Fixed a typo
+- **macros**: Updated the macros book link
+- **options1**:
+  - Removed unused code
+  - Added more granular tests
+- Fixed some comment syntax shenanigans in info.toml
+
+#### Housekeeping
+
+- Fixed a typo in .editorconfig
+- Fixed a typo in integration_tests.rs
+- Clarified manual installation instructions using `cargo install --path .`
+- Added a link to our Zulip in the readme file
+
 <a name="5.0.0"></a>
 ## 5.0.0 (2022-07-16)

--- a/Cargo.lock
+++ b/Cargo.lock
@@ -459,7 +459,7 @@ checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"

 [[package]]
 name = "rustlings"
-version = "4.8.0"
+version = "5.1.0"
 dependencies = [
 "argh",
 "assert_cmd",
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rustlings"
-version = "5.0.0"
+version = "5.1.0"
 authors = ["Liv <mokou@fastmail.com>", "Carol (Nichols || Goulding) <carol.nichols@gmail.com>"]
 edition = "2021"

--- a/README.md
+++ b/README.md
@@ -54,11 +54,11 @@ If you get a permission denied message, you might have to exclude the directory

 ## Manually

-Basically: Clone the repository at the latest tag, run `cargo install`.
+Basically: Clone the repository at the latest tag, run `cargo install --path .`.

 ```bash
-# find out the latest version at https://github.com/rust-lang/rustlings/releases/latest (on edit 5.0.0)
-git clone -b 5.0.0 --depth 1 https://github.com/rust-lang/rustlings
+# find out the latest version at https://github.com/rust-lang/rustlings/releases/latest (on edit 5.1.0)
+git clone -b 5.1.0 --depth 1 https://github.com/rust-lang/rustlings
 cd rustlings
 cargo install --force --path .
 ```
@@ -154,6 +154,10 @@ Now you should be done!

 See [CONTRIBUTING.md](./CONTRIBUTING.md).

+Development-focused discussion about Rustlings happens in the [**rustlings** stream](https://rust-lang.zulipchat.com/#narrow/stream/334454-rustlings)
+on the [Rust Project Zulip](https://rust-lang.zulipchat.com). Feel free to start a new thread there
+if you have ideas or suggestions!
+
 ## Contributors ✨

 Thanks goes to the wonderful people listed in [AUTHORS.md](./AUTHORS.md) 🎉
--- a/exercises/error_handling/errors5.rs
+++ b/exercises/error_handling/errors5.rs
@@ -4,6 +4,8 @@

 // This exercise uses some concepts that we won't get to until later in the course, like `Box` and the
 // `From` trait. It's not important to understand them in detail right now, but you can read ahead if you like.
+// For now, think of the `Box<dyn ...>` type as an "I want anything that does ???" type, which, given
+// Rust's usual standards for runtime safety, should strike you as somewhat lenient!

 // In short, this particular use case for boxes is for when you want to own a value and you care only that it is a 
 // type which implements a particular trait. To do so, The Box is declared as of type Box<dyn Trait> where Trait is the trait
--- a/exercises/macros/README.md
+++ b/exercises/macros/README.md
@@ -7,4 +7,4 @@ macros. Instead, we'll show you how to use and create them.
 ## Further information

 - [Macros](https://doc.rust-lang.org/book/ch19-06-macros.html)
- [The Little Book of Rust Macros](https://danielkeep.github.io/tlborm/book/index.html)
+- [The Little Book of Rust Macros](https://veykril.github.io/tlborm/)
--- a/exercises/options/options1.rs
+++ b/exercises/options/options1.rs
@@ -3,17 +3,13 @@

 // I AM NOT DONE

-// you can modify anything EXCEPT for this function's signature
-fn print_number(maybe_number: Option<u16>) {
-    println!("printing: {}", maybe_number.unwrap());
-}
-
 // 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
 // all, so there'll be no more left :(
 // TODO: Return an Option!
 fn maybe_icecream(time_of_day: u16) -> Option<u16> {
    // We use the 24-hour system here, so 10PM is a value of 22
+    // The Option output should gracefully handle cases where time_of_day > 24.
    ???
 }

@@ -23,15 +19,17 @@ mod tests {

    #[test]
    fn check_icecream() {
-        assert_eq!(maybe_icecream(10), Some(5));
-        assert_eq!(maybe_icecream(23), None);
-        assert_eq!(maybe_icecream(22), None);
+        assert_eq!(maybe_icecream(9), Some(5));
+        assert_eq!(maybe_icecream(10), Some(0));
+        assert_eq!(maybe_icecream(23), Some(0));
+        assert_eq!(maybe_icecream(22), Some(0));
+        assert_eq!(maybe_icecream(25), None);
    }

    #[test]
    fn raw_value() {
        // 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, 0);
    }
 }
--- a/exercises/quiz2.rs
+++ b/exercises/quiz2.rs
@@ -42,7 +42,7 @@ mod my_module {

 #[cfg(test)]
 mod tests {
-    // TODO: What to we have to import to have `transformer` in scope?
+    // TODO: What do we have to import to have `transformer` in scope?
    use ???;
    use super::Command;

--- a/exercises/standard_library_types/box1.rs
+++ b/exercises/standard_library_types/box1.rs
@@ -10,7 +10,7 @@
 // elements: the value of the current item and the next item. The last item is a value called `Nil`.
 //
 // Step 1: use a `Box` in the enum definition to make the code compile
-// Step 2: create both empty and non-empty cons lists by replacing `unimplemented!()`
+// Step 2: create both empty and non-empty cons lists by replacing `todo!()`
 //
 // Note: the tests should not be changed
 //
@@ -33,11 +33,11 @@ fn main() {
 }

 pub fn create_empty_list() -> List {
-    unimplemented!()
+    todo!()
 }

 pub fn create_non_empty_list() -> List {
-    unimplemented!()
+    todo!()
 }

 #[cfg(test)]
--- a/exercises/standard_library_types/cow1.rs
+++ b/exercises/standard_library_types/cow1.rs
@@ -0,0 +1,48 @@
+// cow1.rs
+
+// This exercise explores the Cow, or Clone-On-Write type.
+// Cow is a clone-on-write smart pointer.
+// It can enclose and provide immutable access to borrowed data, and clone the data lazily when mutation or ownership is required.
+// The type is designed to work with general borrowed data via the Borrow trait.
+
+// I AM NOT DONE
+
+use std::borrow::Cow;
+
+fn abs_all<'a, 'b>(input: &'a mut Cow<'b, [i32]>) -> &'a mut Cow<'b, [i32]> {
+    for i in 0..input.len() {
+        let v = input[i];
+        if v < 0 {
+            // Clones into a vector if not already owned.
+            input.to_mut()[i] = -v;
+        }
+    }
+    input
+}
+
+fn main() {
+    // No clone occurs because `input` doesn't need to be mutated.
+    let slice = [0, 1, 2];
+    let mut input = Cow::from(&slice[..]);
+    match abs_all(&mut input) {
+        Cow::Borrowed(_) => println!("I borrowed the slice!"),
+        _ => panic!("expected borrowed value"),
+    }
+
+    // Clone occurs because `input` needs to be mutated.
+    let slice = [-1, 0, 1];
+    let mut input = Cow::from(&slice[..]);
+    match abs_all(&mut input) {
+        Cow::Owned(_) => println!("I modified the slice and now own it!"),
+        _ => panic!("expected owned value"),
+    }
+
+    // No clone occurs because `input` is already owned.
+    let slice = vec![-1, 0, 1];
+    let mut input = Cow::from(slice);
+    match abs_all(&mut input) {
+        // TODO
+        Cow::Borrowed(_) => println!("I own this slice!"),
+        _ => panic!("expected borrowed value"),
+    }
+}
--- a/exercises/standard_library_types/rc1.rs
+++ b/exercises/standard_library_types/rc1.rs
@@ -0,0 +1,98 @@
+// rc1.rs
+// In this exercise, we want to express the concept of multiple owners via the Rc<T> type.
+// This is a model of our solar system - there is a Sun type and multiple Planets.
+// The Planets take ownership of the sun, indicating that they revolve around the sun.
+
+// Make this code compile by using the proper Rc primitives to express that the sun has multiple owners.
+
+// I AM NOT DONE
+use std::rc::Rc;
+
+#[derive(Debug)]
+struct Sun {}
+
+#[derive(Debug)]
+enum Planet {
+    Mercury(Rc<Sun>),
+    Venus(Rc<Sun>),
+    Earth(Rc<Sun>),
+    Mars(Rc<Sun>),
+    Jupiter(Rc<Sun>),
+    Saturn(Rc<Sun>),
+    Uranus(Rc<Sun>),
+    Neptune(Rc<Sun>),
+}
+
+impl Planet {
+    fn details(&self) {
+        println!("Hi from {:?}!", self)
+    }
+}
+
+fn main() {
+    let sun = Rc::new(Sun {});
+    println!("reference count = {}", Rc::strong_count(&sun)); // 1 reference
+
+    let mercury = Planet::Mercury(Rc::clone(&sun));
+    println!("reference count = {}", Rc::strong_count(&sun)); // 2 references
+    mercury.details();
+
+    let venus = Planet::Venus(Rc::clone(&sun));
+    println!("reference count = {}", Rc::strong_count(&sun)); // 3 references
+    venus.details();
+
+    let earth = Planet::Earth(Rc::clone(&sun));
+    println!("reference count = {}", Rc::strong_count(&sun)); // 4 references
+    earth.details();
+
+    let mars = Planet::Mars(Rc::clone(&sun));
+    println!("reference count = {}", Rc::strong_count(&sun)); // 5 references
+    mars.details();
+
+    let jupiter = Planet::Jupiter(Rc::clone(&sun));
+    println!("reference count = {}", Rc::strong_count(&sun)); // 6 references
+    jupiter.details();
+
+    // TODO
+    let saturn = Planet::Saturn(Rc::new(Sun {}));
+    println!("reference count = {}", Rc::strong_count(&sun)); // 7 references
+    saturn.details();
+
+    // TODO
+    let uranus = Planet::Uranus(Rc::new(Sun {}));
+    println!("reference count = {}", Rc::strong_count(&sun)); // 8 references
+    uranus.details();
+
+    // TODO
+    let neptune = Planet::Neptune(Rc::new(Sun {}));
+    println!("reference count = {}", Rc::strong_count(&sun)); // 9 references
+    neptune.details();
+
+    assert_eq!(Rc::strong_count(&sun), 9);
+
+    drop(neptune);
+    println!("reference count = {}", Rc::strong_count(&sun)); // 8 references
+
+    drop(uranus);
+    println!("reference count = {}", Rc::strong_count(&sun)); // 7 references
+
+    drop(saturn);
+    println!("reference count = {}", Rc::strong_count(&sun)); // 6 references
+
+    drop(jupiter);
+    println!("reference count = {}", Rc::strong_count(&sun)); // 5 references
+
+    drop(mars);
+    println!("reference count = {}", Rc::strong_count(&sun)); // 4 references
+
+    // TODO
+    println!("reference count = {}", Rc::strong_count(&sun)); // 3 references
+
+    // TODO
+    println!("reference count = {}", Rc::strong_count(&sun)); // 2 references
+
+    // TODO
+    println!("reference count = {}", Rc::strong_count(&sun)); // 1 reference
+
+    assert_eq!(Rc::strong_count(&sun), 1);
+}
--- a/exercises/strings/strings3.rs
+++ b/exercises/strings/strings3.rs
@@ -4,7 +4,7 @@
 // I AM NOT DONE

 fn trim_me(input: &str) -> String {
-    // TODO: Remove whitespace from the end of a string!
+    // TODO: Remove whitespace from both ends of a string!
    ???
 }

--- a/exercises/traits/traits4.rs
+++ b/exercises/traits/traits4.rs
@@ -1,7 +1,7 @@
 // traits4.rs
 //
 // Your task is to replace the '??' sections so the code compiles.
-// Don't change any line other than 21.
+// Don't change any line other than the marked one.
 // Execute `rustlings hint traits4` or use the `hint` watch subcommand for a hint.

 // I AM NOT DONE
@@ -19,6 +19,7 @@ struct OtherSoftware {}
 impl Licensed for SomeSoftware {}
 impl Licensed for OtherSoftware {}

+// YOU MAY ONLY CHANGE THE NEXT LINE
 fn compare_license_types(software: ??, software_two: ??) -> bool {
    software.licensing_info() == software_two.licensing_info()
 }
--- a/exercises/traits/traits5.rs
+++ b/exercises/traits/traits5.rs
@@ -1,7 +1,7 @@
 // traits5.rs
 //
 // Your task is to replace the '??' sections so the code compiles.
-// Don't change any line other than 27.
+// Don't change any line other than the marked one.
 // Execute `rustlings hint traits5` or use the `hint` watch subcommand for a hint.

 // I AM NOT DONE
@@ -18,15 +18,20 @@ pub trait OtherTrait {
    }
 }

-struct SomeStruct {
-    name: String,
-}
+struct SomeStruct {}
+struct OtherStruct {}

 impl SomeTrait for SomeStruct {}
 impl OtherTrait for SomeStruct {}
+impl SomeTrait for OtherStruct {}
+impl OtherTrait for OtherStruct {}

+// YOU MAY ONLY CHANGE THE NEXT LINE
 fn some_func(item: ??) -> bool {
    item.some_function() && item.other_function()
 }

-fn main() {}
+fn main() {
+    some_func(SomeStruct {});
+    some_func(OtherStruct {});
+}
--- a/info.toml
+++ b/info.toml
@@ -63,7 +63,7 @@ name = "variables5"
 path = "exercises/variables/variables5.rs"
 mode = "compile"
 hint = """
-In variables3 we already learned how to make an immutable variable mutable
+In variables4 we already learned how to make an immutable variable mutable
 using a special keyword. Unfortunately this doesn't help us much in this exercise
 because we want to assign a different typed value to an existing variable. Sometimes
 you may also like to reuse existing variable names because you are just converting
@@ -123,8 +123,8 @@ name = "functions4"
 path = "exercises/functions/functions4.rs"
 mode = "compile"
 hint = """
-The error message points to line 14 and says it expects a type after the
-`->`. This is where the function's return type should be-- take a look at
+The error message points to line 17 and says it expects a type after the
+`->`. This is where the function's return type should be -- take a look at
 the `is_even` function for an example!

 Also: Did you figure out that, technically, u32 would be the more fitting type
@@ -732,7 +732,7 @@ name = "traits5"
 path = "exercises/traits/traits5.rs"
 mode = "compile"
 hint = """
-To ensure a paramter implements multiple traits use the '+ syntax'. Try replacing the
+To ensure a parameter implements multiple traits use the '+ syntax'. Try replacing the
 '??' with 'impl <> + <>'.

 See the documentation at: https://doc.rust-lang.org/book/ch10-02-traits.html#specifying-multiple-trait-bounds-with-the--syntax
@@ -746,7 +746,7 @@ path = "exercises/quiz3.rs"
 mode = "test"
 hint = """
 To find the best solution to this challenge you're going to need to think back to your
-knowledge of traits, specifically Trait Bound Syntax -  you may also need this: "use std::fmt::Display;""""
+knowledge of traits, specifically Trait Bound Syntax -  you may also need this: `use std::fmt::Display;`."""

 # TESTS

@@ -795,7 +795,10 @@ name = "lifetimes2"
 path = "exercises/lifetimes/lifetimes2.rs"
 mode = "compile"
 hint = """
-What is the compiler checking? How could you change how long an owned variable lives?"""
+Remember that the generic lifetime 'a will get the concrete lifetime that is equal to the smaller of the lifetimes of x and y.
+You can take at least two paths to achieve the desired result while keeping the inner block:
+1. Move the string2 declaration to make it live as long as string1 (how is result declared?)
+2. Move println! into the inner block"""

 [[exercises]]
 name = "lifetimes3"
@@ -929,6 +932,31 @@ is too much of a struggle, consider reading through all of Chapter 16 in the boo
 https://doc.rust-lang.org/stable/book/ch16-00-concurrency.html
 """

+[[exercises]]
+name = "rc1"
+path = "exercises/standard_library_types/rc1.rs"
+mode = "compile"
+hint = """
+This is a straightforward exercise to use the Rc<T> type. Each Planet has
+ownership of the Sun, and uses Rc::clone() to increment the reference count of the Sun.
+After using drop() to move the Planets out of scope individually, the reference count goes down.
+In the end the sun only has one reference again, to itself. See more at:
+https://doc.rust-lang.org/book/ch15-04-rc.html
+
+* Unforunately Pluto is no longer considered a planet :(
+"""
+
+[[exercises]]
+name = "cow1"
+path = "exercises/standard_library_types/cow1.rs"
+mode = "compile"
+hint = """
+Since the vector is already owned, the `Cow` type doesn't need to clone it.
+
+Checkout https://doc.rust-lang.org/std/borrow/enum.Cow.html for documentation
+on the `Cow` type.
+"""
+
 # THREADS

 [[exercises]]
@@ -985,7 +1013,7 @@ An alternate way to handle concurrency between threads is to use
 a mpsc (multiple producer, single consumer) channel to communicate.
 With both a sending end and a receiving end, it's possible to
 send values in one thread and receieve them in another.
-Multiple producers are possibile by using clone() to create a duplicate
+Multiple producers are possible by using clone() to create a duplicate
 of the original sending end.
 See https://doc.rust-lang.org/book/ch16-02-message-passing.html for more info.
 """
--- a/src/main.rs
+++ b/src/main.rs
@@ -26,7 +26,7 @@ mod run;
 mod verify;

 // In sync with crate version
-const VERSION: &str = "5.0.0";
+const VERSION: &str = "5.1.0";

 #[derive(FromArgs, PartialEq, Debug)]
 /// Rustlings is a collection of small exercises to get you used to writing and reading Rust code
--- a/tests/integration_tests.rs
+++ b/tests/integration_tests.rs
@@ -176,7 +176,7 @@ fn run_single_test_success_with_output() {
        .current_dir("tests/fixture/success/")
        .assert()
        .code(0)
-        .stdout(predicates::str::contains("THIS TEST TOO SHALL PAS"));
+        .stdout(predicates::str::contains("THIS TEST TOO SHALL PASS"));
 }

 #[test]
@@ -187,7 +187,7 @@ fn run_single_test_success_without_output() {
        .current_dir("tests/fixture/success/")
        .assert()
        .code(0)
-        .stdout(predicates::str::contains("THIS TEST TOO SHALL PAS").not());
+        .stdout(predicates::str::contains("THIS TEST TOO SHALL PASS").not());
 }

 #[test]
Author	SHA1	Message	Date
mokou	714a8075cc	chore: bump version	2022-08-16 09:54:25 +02:00
mokou	0a9d34a25a	doc: update changelog	2022-08-16 09:53:40 +02:00
mokou	bb6b9e1704	doc: add zulip link	2022-08-16 09:41:41 +02:00
liv	8a4ed70762	Merge pull request #1069 from exdx/rc-exercise feat: add rc1.rs exercise	2022-08-16 09:37:39 +02:00
liv	1c3b003c7c	Merge branch 'main' into rc-exercise	2022-08-16 09:37:34 +02:00
liv	25ab52b8e7	Merge pull request #1103 from exdx/feat/cow feat: add cow1.rs exercise	2022-08-16 09:35:53 +02:00
liv	cd0ee50dd7	Merge pull request #1146 from rust-lang/all-contributors/add-nico-vromans docs: add nico-vromans as a contributor for content	2022-08-16 09:32:57 +02:00
allcontributors[bot]	2f2f141564	docs: update .all-contributorsrc [skip ci]	2022-08-16 07:32:32 +00:00
allcontributors[bot]	4400ce2892	docs: update AUTHORS.md [skip ci]	2022-08-16 07:32:31 +00:00
liv	cc1b22d45f	Merge pull request #1144 from nico-vromans/patch-1 Update options1.rs	2022-08-16 09:32:18 +02:00
Nico Vromans	e8122daa87	Update options1.rs Added extra test for before 10PM and updated the test for at 10PM (when it's 10PM there should already not be any ice cream left, as per the description). Also fixed the `raw_value` test, as it is later than 10PM, so there should be no more ice cream left.	2022-08-15 10:05:50 +02:00
liv	8dfffe8aa2	Merge pull request #1141 from rust-lang/all-contributors/add-markusboehme docs: add markusboehme as a contributor for code	2022-08-12 10:25:27 +02:00
allcontributors[bot]	f107e2f31d	docs: update .all-contributorsrc [skip ci]	2022-08-12 08:25:13 +00:00
allcontributors[bot]	cf813b707c	docs: update AUTHORS.md [skip ci]	2022-08-12 08:25:12 +00:00
liv	2b0c73c7e4	Merge pull request #1140 from markusboehme/fix/options1/remove-unused-code fix(options1): remove unused code	2022-08-12 10:24:58 +02:00
Markus Boehme	3c84cc1702	fix(options1): remove unused code Since rewriting the exercise in commit `06e4fd3765` the print_number function goes unused. Remove it.	2022-08-11 22:54:08 +02:00
liv	57377e8bf7	Merge pull request #1139 from rust-lang/all-contributors/add-brianfakhoury docs: add brianfakhoury as a contributor for content	2022-08-11 12:38:36 +02:00
allcontributors[bot]	a16e7b918a	docs: update .all-contributorsrc [skip ci]	2022-08-11 10:38:01 +00:00
allcontributors[bot]	7e1a4c0363	docs: update AUTHORS.md [skip ci]	2022-08-11 10:38:00 +00:00
liv	cfbce9d225	Merge pull request #1138 from rust-lang/all-contributors/add-johnmendel docs: add johnmendel as a contributor for code	2022-08-11 12:31:22 +02:00
allcontributors[bot]	c1c4f86317	docs: update .all-contributorsrc [skip ci]	2022-08-11 10:30:25 +00:00
allcontributors[bot]	dcf4efe628	docs: update AUTHORS.md [skip ci]	2022-08-11 10:30:24 +00:00
liv	26b347a8bd	Merge pull request #1131 from johnmendel/main fix(traits5): make exercise prefer trait-based solution	2022-08-11 12:30:12 +02:00
liv	3c85fc4d39	Merge pull request #1136 from rust-lang/all-contributors/add-Mouwrice docs: add Mouwrice as a contributor for content	2022-08-11 12:29:35 +02:00
liv	a7ca40d8a3	Merge pull request #1132 from brianfakhoury/patch-1 Fix minor spelling	2022-08-11 12:29:16 +02:00
allcontributors[bot]	8d9df94b6c	docs: update .all-contributorsrc [skip ci]	2022-08-11 10:27:28 +00:00
allcontributors[bot]	bf84fe029f	docs: update AUTHORS.md [skip ci]	2022-08-11 10:27:27 +00:00
liv	ca96e32ff7	Merge pull request #1133 from Mouwrice/fix/macro-readme-book-link fix(macros-readme): update the book link to the more recent version of the book	2022-08-11 12:27:12 +02:00
Mouwrice	ef70ad907f	fix(macros-readme): update the book link to the more recent version of the book	2022-08-09 20:27:27 +02:00
Brian Fakhoury	f25f77e915	Fix minor spelling	2022-08-08 15:39:35 -04:00
John Mendelewski III	a0a06232ce	fix(traits5): make exercise prefer trait-based solution closes #1088	2022-08-07 14:51:16 -04:00
liv	300cdc27dd	Merge pull request #1123 from rust-lang/all-contributors/add-clairew docs: add clairew as a contributor for content	2022-08-03 17:36:14 +02:00
allcontributors[bot]	7a7281764c	docs: update .all-contributorsrc [skip ci]	2022-08-03 15:36:08 +00:00
allcontributors[bot]	d27c12e35d	docs: update AUTHORS.md [skip ci]	2022-08-03 15:36:07 +00:00
liv	cbf9016187	Merge pull request #1110 from clairew/fix/info-toml-typo fix: remove extra " typo in info.toml	2022-08-03 17:35:51 +02:00
liv	6ac42c5141	Merge pull request #1122 from rust-lang/all-contributors/add-tvkn docs: add tvkn as a contributor for content	2022-08-03 17:35:08 +02:00
allcontributors[bot]	6289238d1d	docs: update .all-contributorsrc [skip ci]	2022-08-03 15:35:00 +00:00
allcontributors[bot]	e3b65186fd	docs: update AUTHORS.md [skip ci]	2022-08-03 15:34:59 +00:00
liv	affc815447	Merge pull request #1112 from tvkn/feat/options1/update-expected-result feat(options1): update expected result	2022-08-03 17:34:43 +02:00
mokou	af301a2efe	feat(errors5): add simpler explanation for box dyn	2022-08-03 17:31:42 +02:00
liv	977a167335	Merge pull request #1121 from rust-lang/all-contributors/add-Lioness100 docs: add Lioness100 as a contributor for content	2022-08-03 17:13:28 +02:00
allcontributors[bot]	08f42761f9	docs: update .all-contributorsrc [skip ci]	2022-08-03 15:13:19 +00:00
allcontributors[bot]	a04d62372f	docs: update AUTHORS.md [skip ci]	2022-08-03 15:13:18 +00:00
liv	5a8f2b62e3	Merge pull request #1117 from Lioness100/refactor/todo refactor(box1): prefer todo! over unimplemented!	2022-08-03 17:12:58 +02:00
Lioness100	c5ecc37a9a	refactor(box1): prefer todo! over unimplemented!	2022-07-30 10:50:07 -04:00
Tristan Nicholls	a56f648cce	feat(options1): update expected result Expected result is updated to better showcase the difference between - a valid result with no ice-creams `Some(0)`, and - an invalid result `None`.	2022-07-26 21:01:09 +02:00
Claire Wang	a3a5fbeddf	fix: remove extra " typo in info.toml	2022-07-25 19:00:35 -07:00
liv	3963559810	Merge pull request #1106 from rust-lang/all-contributors/add-thatlittleboy docs: add thatlittleboy as a contributor for content	2022-07-24 23:26:20 +02:00
allcontributors[bot]	4bee3399f8	docs: update .all-contributorsrc [skip ci]	2022-07-24 21:26:13 +00:00
allcontributors[bot]	32687cc66e	docs: update AUTHORS.md [skip ci]	2022-07-24 21:26:12 +00:00
liv	d21a8e63c1	Merge pull request #1102 from thatlittleboy/fix/hints-typos Fix/hints typos	2022-07-24 23:25:58 +02:00
Denton24646	72e21a2a6c	feat: add cow1.rs exercise	2022-07-23 17:59:53 -04:00
Jeremy Goh	301bc52857	fix: lineno typo	2022-07-24 00:37:40 +08:00
Jeremy Goh	f88c7d1e8c	fix: reference to variables4	2022-07-24 00:36:27 +08:00
liv	3a327096c6	Merge pull request #1101 from rust-lang/all-contributors/add-saikatdas0790 docs: add saikatdas0790 as a contributor for content	2022-07-23 17:41:10 +02:00
allcontributors[bot]	7a6079b46a	docs: update .all-contributorsrc [skip ci]	2022-07-23 15:41:03 +00:00
allcontributors[bot]	c1fc77e50f	docs: update AUTHORS.md [skip ci]	2022-07-23 15:41:02 +00:00
liv	cbca27dffe	Merge pull request #1099 from saikatdas0790/patch-1 Fix manual installation with install to the current directory	2022-07-23 17:40:43 +02:00
liv	5cb40b2c95	Merge pull request #1094 from greg-el/main fix(run): correct "PAS" in `integration_tests.rs`	2022-07-23 17:38:27 +02:00
liv	e0fb7e72bb	Merge pull request #1100 from rust-lang/all-contributors/add-EdwinChang24 docs: add EdwinChang24 as a contributor for content	2022-07-23 17:37:13 +02:00
allcontributors[bot]	e858fd94fb	docs: update .all-contributorsrc [skip ci]	2022-07-23 15:37:06 +00:00
allcontributors[bot]	56c05f6232	docs: update AUTHORS.md [skip ci]	2022-07-23 15:37:05 +00:00
liv	2663cc8e80	Merge pull request #1092 from EdwinChang24/fix-editorconfig fix: Fix typo in .editorconfig	2022-07-23 17:36:42 +02:00
Saikat Das	2356b5c1b6	Fix manual installation with install to the current directory	2022-07-23 15:55:30 +05:30
Greg Leonard	e9f5c9423c	fix(run): correct "PAS" in `integration_tests.rs`	2022-07-21 23:13:22 +01:00
Edwin Chang	f34d390bba	fix: Fix typo in .editorconfig	2022-07-20 18:23:31 -04:00
liv	fb7dac75a7	Merge pull request #1089 from greg-el/main fix(traits5): fix "paramter" spelling	2022-07-20 09:09:43 +02:00
Greg Leonard	f9413b8ae1	fix(traits5): fix "paramter" spelling	2022-07-19 20:05:04 +01:00
liv	fef10b8a0f	Merge pull request #1087 from rust-lang/all-contributors/add-PrettyWood docs: add PrettyWood as a contributor for content	2022-07-19 14:40:31 +02:00
allcontributors[bot]	82c41a61b6	docs: update .all-contributorsrc [skip ci]	2022-07-19 12:40:23 +00:00
allcontributors[bot]	3b74f5dae8	docs: update AUTHORS.md [skip ci]	2022-07-19 12:40:22 +00:00
liv	316fc58b4c	Merge pull request #1086 from PrettyWood/patch-2 remove small typo in hint of threads3	2022-07-19 14:40:07 +02:00
Eric Jolibois	8a4dca5fa6	remove small typo in hint of threads3	2022-07-19 11:45:34 +02:00
liv	0e7de2e7a7	Merge pull request #1079 from Tostapunk/fix/lifetimes-patch1 fix: Improve hint of lifetimes2	2022-07-18 16:06:16 +02:00
Mattia Schiavon	e1d6abb4c9	Apply suggestions from code review Co-authored-by: liv <mokou@fastmail.com>	2022-07-18 14:44:16 +02:00
Tostapunk	02d78c3e84	fix: Improve hint of lifetimes2 fixes #1071	2022-07-18 14:11:51 +02:00
liv	727fc3037c	Merge pull request #1078 from rust-lang/all-contributors/add-Tostapunk docs: add Tostapunk as a contributor for content	2022-07-18 10:48:20 +02:00
allcontributors[bot]	1aecf32748	docs: update .all-contributorsrc [skip ci]	2022-07-18 08:47:49 +00:00
allcontributors[bot]	2f113b9b06	docs: update AUTHORS.md [skip ci]	2022-07-18 08:47:49 +00:00
liv	d46a97ef97	Merge pull request #1076 from Tostapunk/main fix(traits5.rs): wrong line number	2022-07-18 10:47:35 +02:00
Tostapunk	7035d6787c	fix(traits5.rs): wrong line number	2022-07-18 00:27:57 +02:00
Denton24646	ce86d252e5	feat: add rc1.rs exercise	2022-07-16 17:39:03 -04:00
liv	8a0c6cfcfa	Merge pull request #1068 from wojexe/patch-2 fix(traits4.rs): wrong line number	2022-07-16 20:48:09 +02:00
wojexe	b0e070c743	fix(traits4.rs): wrong line number fixes #1067	2022-07-16 19:51:50 +02:00
liv	ab291a1fcd	Merge pull request #1065 from rust-lang/all-contributors/add-wojexe docs: add wojexe as a contributor for content	2022-07-16 18:27:48 +02:00
allcontributors[bot]	3bb008ebbb	docs: update .all-contributorsrc [skip ci]	2022-07-16 16:27:41 +00:00
allcontributors[bot]	e8cf9b2628	docs: update AUTHORS.md [skip ci]	2022-07-16 16:27:40 +00:00
liv	179202a34a	Merge pull request #1064 from wojexe/patch-1 fix: make strings3.rs comment wording more clear	2022-07-16 18:27:26 +02:00
wojexe	55900c65cb	fix: make strings3.rs comment wording more clear fixes #1063	2022-07-16 17:28:13 +02:00