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https://git.aramjonghu.dev/AramJonghu/rustlings.git
synced 2026-09-04 17:23:36 +02:00
Clean up and unify exercises
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mo8it
@@ -1,5 +1,3 @@
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// arc1.rs
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//
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// In this exercise, we are given a Vec of u32 called "numbers" with values
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// ranging from 0 to 99 -- [ 0, 1, 2, ..., 98, 99 ] We would like to use this
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// set of numbers within 8 different threads simultaneously. Each thread is
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@@ -18,8 +16,6 @@
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// first TODO comment is, and create an initial binding for `child_numbers`
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// where the second TODO comment is. Try not to create any copies of the
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// `numbers` Vec!
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//
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// Execute `rustlings hint arc1` or use the `hint` watch subcommand for a hint.
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#![forbid(unused_imports)] // Do not change this, (or the next) line.
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use std::sync::Arc;
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@@ -1,5 +1,3 @@
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// box1.rs
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//
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// At compile time, Rust needs to know how much space a type takes up. This
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// becomes problematic for recursive types, where a value can have as part of
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// itself another value of the same type. To get around the issue, we can use a
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@@ -15,8 +13,6 @@
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// Step 2: create both empty and non-empty cons lists by replacing `todo!()`
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//
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// Note: the tests should not be changed
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//
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// Execute `rustlings hint box1` or use the `hint` watch subcommand for a hint.
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#[derive(PartialEq, Debug)]
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pub enum List {
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@@ -1,5 +1,3 @@
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// cow1.rs
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//
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// This exercise explores the Cow, or Clone-On-Write type. Cow is a
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// clone-on-write smart pointer. It can enclose and provide immutable access to
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// borrowed data, and clone the data lazily when mutation or ownership is
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@@ -9,8 +7,6 @@
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// This exercise is meant to show you what to expect when passing data to Cow.
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// Fix the unit tests by checking for Cow::Owned(_) and Cow::Borrowed(_) at the
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// TODO markers.
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//
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// Execute `rustlings hint cow1` or use the `hint` watch subcommand for a hint.
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use std::borrow::Cow;
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@@ -1,5 +1,3 @@
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// rc1.rs
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//
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// In this exercise, we want to express the concept of multiple owners via the
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// Rc<T> type. This is a model of our solar system - there is a Sun type and
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// multiple Planets. The Planets take ownership of the sun, indicating that they
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@@ -7,8 +5,6 @@
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//
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// Make this code compile by using the proper Rc primitives to express that the
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// sun has multiple owners.
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//
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// Execute `rustlings hint rc1` or use the `hint` watch subcommand for a hint.
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use std::rc::Rc;
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@@ -33,71 +29,80 @@ impl Planet {
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}
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}
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#[test]
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fn main() {
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let sun = Rc::new(Sun {});
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println!("reference count = {}", Rc::strong_count(&sun)); // 1 reference
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let mercury = Planet::Mercury(Rc::clone(&sun));
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println!("reference count = {}", Rc::strong_count(&sun)); // 2 references
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mercury.details();
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let venus = Planet::Venus(Rc::clone(&sun));
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println!("reference count = {}", Rc::strong_count(&sun)); // 3 references
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venus.details();
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let earth = Planet::Earth(Rc::clone(&sun));
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println!("reference count = {}", Rc::strong_count(&sun)); // 4 references
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earth.details();
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let mars = Planet::Mars(Rc::clone(&sun));
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println!("reference count = {}", Rc::strong_count(&sun)); // 5 references
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mars.details();
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let jupiter = Planet::Jupiter(Rc::clone(&sun));
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println!("reference count = {}", Rc::strong_count(&sun)); // 6 references
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jupiter.details();
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// TODO
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let saturn = Planet::Saturn(Rc::new(Sun {}));
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println!("reference count = {}", Rc::strong_count(&sun)); // 7 references
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saturn.details();
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// TODO
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let uranus = Planet::Uranus(Rc::new(Sun {}));
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println!("reference count = {}", Rc::strong_count(&sun)); // 8 references
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uranus.details();
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// TODO
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let neptune = Planet::Neptune(Rc::new(Sun {}));
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println!("reference count = {}", Rc::strong_count(&sun)); // 9 references
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neptune.details();
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assert_eq!(Rc::strong_count(&sun), 9);
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drop(neptune);
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println!("reference count = {}", Rc::strong_count(&sun)); // 8 references
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drop(uranus);
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println!("reference count = {}", Rc::strong_count(&sun)); // 7 references
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drop(saturn);
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println!("reference count = {}", Rc::strong_count(&sun)); // 6 references
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drop(jupiter);
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println!("reference count = {}", Rc::strong_count(&sun)); // 5 references
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drop(mars);
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println!("reference count = {}", Rc::strong_count(&sun)); // 4 references
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// TODO
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println!("reference count = {}", Rc::strong_count(&sun)); // 3 references
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// TODO
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println!("reference count = {}", Rc::strong_count(&sun)); // 2 references
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// TODO
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println!("reference count = {}", Rc::strong_count(&sun)); // 1 reference
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assert_eq!(Rc::strong_count(&sun), 1);
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// You can optionally experiment here.
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn rc1() {
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let sun = Rc::new(Sun {});
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println!("reference count = {}", Rc::strong_count(&sun)); // 1 reference
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let mercury = Planet::Mercury(Rc::clone(&sun));
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println!("reference count = {}", Rc::strong_count(&sun)); // 2 references
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mercury.details();
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let venus = Planet::Venus(Rc::clone(&sun));
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println!("reference count = {}", Rc::strong_count(&sun)); // 3 references
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venus.details();
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let earth = Planet::Earth(Rc::clone(&sun));
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println!("reference count = {}", Rc::strong_count(&sun)); // 4 references
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earth.details();
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let mars = Planet::Mars(Rc::clone(&sun));
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println!("reference count = {}", Rc::strong_count(&sun)); // 5 references
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mars.details();
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let jupiter = Planet::Jupiter(Rc::clone(&sun));
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println!("reference count = {}", Rc::strong_count(&sun)); // 6 references
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jupiter.details();
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// TODO
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let saturn = Planet::Saturn(Rc::new(Sun {}));
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println!("reference count = {}", Rc::strong_count(&sun)); // 7 references
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saturn.details();
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// TODO
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let uranus = Planet::Uranus(Rc::new(Sun {}));
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println!("reference count = {}", Rc::strong_count(&sun)); // 8 references
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uranus.details();
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// TODO
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let neptune = Planet::Neptune(Rc::new(Sun {}));
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println!("reference count = {}", Rc::strong_count(&sun)); // 9 references
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neptune.details();
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assert_eq!(Rc::strong_count(&sun), 9);
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drop(neptune);
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println!("reference count = {}", Rc::strong_count(&sun)); // 8 references
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drop(uranus);
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println!("reference count = {}", Rc::strong_count(&sun)); // 7 references
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drop(saturn);
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println!("reference count = {}", Rc::strong_count(&sun)); // 6 references
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drop(jupiter);
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println!("reference count = {}", Rc::strong_count(&sun)); // 5 references
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drop(mars);
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println!("reference count = {}", Rc::strong_count(&sun)); // 4 references
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// TODO
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println!("reference count = {}", Rc::strong_count(&sun)); // 3 references
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// TODO
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println!("reference count = {}", Rc::strong_count(&sun)); // 2 references
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// TODO
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println!("reference count = {}", Rc::strong_count(&sun)); // 1 reference
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assert_eq!(Rc::strong_count(&sun), 1);
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}
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}
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