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https://github.com/mainmatter/100-exercises-to-learn-rust
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Adjust margins for paperback version. Ensure nothing breaches the right margin.
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LukeMathWalker
parent
05e3efd298
commit
f9a1d427b2
8 changed files with 19 additions and 15 deletions
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@ -61,7 +61,7 @@ monofontfallback = [
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urlstyle = "rm"
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documentclass = "book"
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fontsize = "11pt"
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geometry = "papersize={8in,10in},top=2cm,bottom=2cm,left=2.4cm,right=2.4cm"
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geometry = "papersize={8in,10in},top=2cm,bottom=2cm,left=2.8cm,right=2.5cm"
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header-includes = [
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# Reduce font size of code blocks
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"\\DefineVerbatimEnvironment{Highlighting}{Verbatim}{commandchars=\\\\\\{\\},fontsize=\\small}",
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@ -34,8 +34,8 @@ also find solutions to all exercises in the
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## Formats
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You can browse the course material in the browser, at [rust-exercises.com/100-exercises/](https://rust-exercises.com/100-exercises/).\
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You can also [download the course material as a PDF file](https://rust-exercises.com/100-exercises-to-learn-rust.pdf), for offline reading.
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You can go through the course material [in the browser](https://rust-exercises.com/100-exercises/).\
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You can also [download it as a PDF file](https://rust-exercises.com/100-exercises-to-learn-rust.pdf), for offline reading.
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## Structure
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@ -51,8 +51,7 @@ Before starting the course, make sure to clone the repository to your local mach
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# If you have an SSH key set up with GitHub
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git clone git@github.com:mainmatter/100-exercises-to-learn-rust.git
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# Otherwise, use the HTTPS URL:
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#
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# git clone https://github.com/mainmatter/100-exercises-to-learn-rust.git
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# https://github.com/mainmatter/100-exercises-to-learn-rust.git
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```
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We also recommend you work on a branch, so you can easily track your progress and pull
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@ -32,7 +32,7 @@ The function's body is enclosed in curly braces `{}`.
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In previous exercise, you saw the `greeting` function:
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```rust
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// `fn` <function_name> ( <input parameters> ) -> <return_type> { <body> }
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// `fn` <function_name> ( <input params> ) -> <return_type> { <body> }
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fn greeting() -> &'static str {
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// TODO: fix me 👇
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"I'm ready to __!"
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@ -97,8 +97,8 @@ Ownership can be transferred.
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If you own a value, for example, you can transfer ownership to another variable:
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```rust
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let a = "hello, world".to_string(); // <--- `a` is the owner of the String
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let b = a; // <--- `b` is now the owner of the String
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let a = "hello, world".to_string(); // <- `a` is the owner of the String
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let b = a; // <- `b` is now the owner of the String
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```
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Rust's ownership system is baked into the type system: each function has to declare in its signature
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@ -89,7 +89,8 @@ although a bit more cumbersome to read:
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impl ::core::cmp::PartialEq for Ticket {
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#[inline]
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fn eq(&self, other: &Ticket) -> bool {
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self.title == other.title && self.description == other.description
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self.title == other.title
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&& self.description == other.description
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&& self.status == other.status
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}
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}
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@ -99,7 +99,8 @@ error[E0599]: no method named `is_even` found for type parameter `T`
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--> src/lib.rs:2:10
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1 | fn print_if_even<T>(n: T) {
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| - method `is_even` not found for this type parameter
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| - method `is_even` not found
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| for this type parameter
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2 | if n.is_even() {
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| ^^^^^^^ method not found in `T`
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@ -111,7 +111,8 @@ fn main() {
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The compiler is not happy with this code:
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```text
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error[E0277]: `MutexGuard<'_, i32>` cannot be sent between threads safely
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error[E0277]: `MutexGuard<'_, i32>` cannot be sent between
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threads safely
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--> src/main.rs:10:7
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10 | spawn(move || {
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@ -122,9 +123,10 @@ error[E0277]: `MutexGuard<'_, i32>` cannot be sent between threads safely
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12 | | });
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| |_^ `MutexGuard<'_, i32>` cannot be sent between threads safely
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= help: the trait `Send` is not implemented for `MutexGuard<'_, i32>`,
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which is required by `{closure@src/main.rs:10:7: 10:14}: Send`
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= note: required for `std::sync::mpsc::Receiver<MutexGuard<'_, i32>>`
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= help: the trait `Send` is not implemented for
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`MutexGuard<'_, i32>`, which is required by
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`{closure@src/main.rs:10:7: 10:14}: Send`
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= note: required for `Receiver<MutexGuard<'_, i32>>`
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to implement `Send`
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note: required because it's used within this closure
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```
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@ -47,7 +47,8 @@ The compiler will reject this code:
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error: future cannot be sent between threads safely
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5 | tokio::spawn(example());
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| ^^^^^^^^^ future returned by `example` is not `Send`
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| ^^^^^^^^^
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| future returned by `example` is not `Send`
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note: future is not `Send` as this value is used across an await
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