Add new exercises for rust

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Daniel Siepmann 2024-03-25 10:12:41 +01:00
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commit aaf6203a49
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{
"authors": [
"IanWhitney"
],
"contributors": [
"andy5995",
"ashleygwilliams",
"cbzehner",
"coriolinus",
"cwhakes",
"EduardoBautista",
"efx",
"ErikSchierboom",
"houhoulis",
"IanWhitney",
"janczer",
"leoyvens",
"lutostag",
"mkantor",
"nfiles",
"NieDzejkob",
"ocstl",
"petertseng",
"rofrol",
"sacherjj",
"stringparser",
"xakon",
"ZapAnton"
],
"files": {
"solution": [
"src/lib.rs",
"Cargo.toml"
],
"test": [
"tests/gigasecond.rs"
],
"example": [
".meta/example.rs"
]
},
"blurb": "Given a moment, determine the moment that would be after a gigasecond has passed.",
"source": "Chapter 9 in Chris Pine's online Learn to Program tutorial.",
"source_url": "https://pine.fm/LearnToProgram/?Chapter=09"
}

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{"track":"rust","exercise":"gigasecond","id":"bab817c2728943b8b80333d1c22c2ab1","url":"https://exercism.org/tracks/rust/exercises/gigasecond","handle":"DanielSiepmann","is_requester":true,"auto_approve":false}

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rust/gigasecond/.gitignore vendored Normal file
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# Generated by Cargo
# will have compiled files and executables
/target/
**/*.rs.bk
# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
# More information here http://doc.crates.io/guide.html#cargotoml-vs-cargolock
Cargo.lock

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[package]
edition = "2021"
name = "gigasecond"
version = "2.0.0"
[dependencies]
time = "0.3"

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rust/gigasecond/HELP.md Normal file
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# Help
## Running the tests
Execute the tests with:
```bash
$ cargo test
```
All but the first test have been ignored. After you get the first test to
pass, open the tests source file which is located in the `tests` directory
and remove the `#[ignore]` flag from the next test and get the tests to pass
again. Each separate test is a function with `#[test]` flag above it.
Continue, until you pass every test.
If you wish to run _only ignored_ tests without editing the tests source file, use:
```bash
$ cargo test -- --ignored
```
If you are using Rust 1.51 or later, you can run _all_ tests with
```bash
$ cargo test -- --include-ignored
```
To run a specific test, for example `some_test`, you can use:
```bash
$ cargo test some_test
```
If the specific test is ignored, use:
```bash
$ cargo test some_test -- --ignored
```
To learn more about Rust tests refer to the online [test documentation][rust-tests].
[rust-tests]: https://doc.rust-lang.org/book/ch11-02-running-tests.html
## Submitting your solution
You can submit your solution using the `exercism submit src/lib.rs Cargo.toml` command.
This command will upload your solution to the Exercism website and print the solution page's URL.
It's possible to submit an incomplete solution which allows you to:
- See how others have completed the exercise
- Request help from a mentor
## Need to get help?
If you'd like help solving the exercise, check the following pages:
- The [Rust track's documentation](https://exercism.org/docs/tracks/rust)
- The [Rust track's programming category on the forum](https://forum.exercism.org/c/programming/rust)
- [Exercism's programming category on the forum](https://forum.exercism.org/c/programming/5)
- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
## Rust Installation
Refer to the [exercism help page][help-page] for Rust installation and learning
resources.
## Submitting the solution
Generally you should submit all files in which you implemented your solution (`src/lib.rs` in most cases). If you are using any external crates, please consider submitting the `Cargo.toml` file. This will make the review process faster and clearer.
## Feedback, Issues, Pull Requests
The GitHub [track repository][github] is the home for all of the Rust exercises. If you have feedback about an exercise, or want to help implement new exercises, head over there and create an issue. Members of the rust track team are happy to help!
If you want to know more about Exercism, take a look at the [contribution guide].
## Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.
[help-page]: https://exercism.org/tracks/rust/learning
[github]: https://github.com/exercism/rust
[contribution guide]: https://exercism.org/docs/community/contributors

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rust/gigasecond/README.md Normal file
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# Gigasecond
Welcome to Gigasecond on Exercism's Rust Track.
If you need help running the tests or submitting your code, check out `HELP.md`.
## Introduction
The way we measure time is kind of messy.
We have 60 seconds in a minute, and 60 minutes in an hour.
This comes from ancient Babylon, where they used 60 as the basis for their number system.
We have 24 hours in a day, 7 days in a week, and how many days in a month?
Well, for days in a month it depends not only on which month it is, but also on what type of calendar is used in the country you live in.
What if, instead, we only use seconds to express time intervals?
Then we can use metric system prefixes for writing large numbers of seconds in more easily comprehensible quantities.
- A food recipe might explain that you need to let the brownies cook in the oven for two kiloseconds (that's two thousand seconds).
- Perhaps you and your family would travel to somewhere exotic for two megaseconds (that's two million seconds).
- And if you and your spouse were married for _a thousand million_ seconds, you would celebrate your one gigasecond anniversary.
~~~~exercism/note
If we ever colonize Mars or some other planet, measuring time is going to get even messier.
If someone says "year" do they mean a year on Earth or a year on Mars?
The idea for this exercise came from the science fiction novel ["A Deepness in the Sky"][vinge-novel] by author Vernor Vinge.
In it the author uses the metric system as the basis for time measurements.
[vinge-novel]: https://www.tor.com/2017/08/03/science-fiction-with-something-for-everyone-a-deepness-in-the-sky-by-vernor-vinge/
~~~~
## Instructions
Your task is to determine the date and time one gigasecond after a certain date.
A gigasecond is one thousand million seconds.
That is a one with nine zeros after it.
If you were born on _January 24th, 2015 at 22:00 (10:00:00pm)_, then you would be a gigasecond old on _October 2nd, 2046 at 23:46:40 (11:46:40pm)_.
If you're unsure what operations you can perform on `PrimitiveDateTime` take a look at the [time crate](https://docs.rs/time) which is listed as a dependency in the `Cargo.toml` file for this exercise.
## Source
### Created by
- @IanWhitney
### Contributed to by
- @andy5995
- @ashleygwilliams
- @cbzehner
- @coriolinus
- @cwhakes
- @EduardoBautista
- @efx
- @ErikSchierboom
- @houhoulis
- @IanWhitney
- @janczer
- @leoyvens
- @lutostag
- @mkantor
- @nfiles
- @NieDzejkob
- @ocstl
- @petertseng
- @rofrol
- @sacherjj
- @stringparser
- @xakon
- @ZapAnton
### Based on
Chapter 9 in Chris Pine's online Learn to Program tutorial. - https://pine.fm/LearnToProgram/?Chapter=09

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use time::PrimitiveDateTime as DateTime;
// Returns a DateTime one billion seconds after start.
pub fn after(start: DateTime) -> DateTime {
todo!("What time is a gigasecond later than {start}");
}

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use time::PrimitiveDateTime as DateTime;
/// Create a datetime from the given numeric point in time.
///
/// Panics if any field is invalid.
fn dt(year: i32, month: u8, day: u8, hour: u8, minute: u8, second: u8) -> DateTime {
use time::{Date, Time};
DateTime::new(
Date::from_calendar_date(year, month.try_into().unwrap(), day).unwrap(),
Time::from_hms(hour, minute, second).unwrap(),
)
}
#[test]
fn date() {
let start_date = dt(2011, 4, 25, 0, 0, 0);
assert_eq!(gigasecond::after(start_date), dt(2043, 1, 1, 1, 46, 40));
}
#[test]
#[ignore]
fn another_date() {
let start_date = dt(1977, 6, 13, 0, 0, 0);
assert_eq!(gigasecond::after(start_date), dt(2009, 2, 19, 1, 46, 40));
}
#[test]
#[ignore]
fn third_date() {
let start_date = dt(1959, 7, 19, 0, 0, 0);
assert_eq!(gigasecond::after(start_date), dt(1991, 3, 27, 1, 46, 40));
}
#[test]
#[ignore]
fn datetime() {
let start_date = dt(2015, 1, 24, 22, 0, 0);
assert_eq!(gigasecond::after(start_date), dt(2046, 10, 2, 23, 46, 40));
}
#[test]
#[ignore]
fn another_datetime() {
let start_date = dt(2015, 1, 24, 23, 59, 59);
assert_eq!(gigasecond::after(start_date), dt(2046, 10, 3, 1, 46, 39));
}

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{
"authors": [
"coriolinus"
],
"contributors": [
"cbzehner",
"ccouzens",
"cwhakes",
"efx",
"ErikSchierboom",
"hunger",
"lutostag",
"ocstl",
"PaulT89",
"petertseng",
"rofrol",
"rrredface",
"stringparser",
"TheDarkula",
"xakon",
"ZapAnton"
],
"files": {
"solution": [
"src/lib.rs",
"Cargo.toml"
],
"test": [
"tests/reverse-string.rs"
],
"example": [
".meta/example.rs"
]
},
"blurb": "Reverse a given string.",
"source": "Introductory challenge to reverse an input string",
"source_url": "https://medium.freecodecamp.org/how-to-reverse-a-string-in-javascript-in-3-different-ways-75e4763c68cb"
}

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{"track":"rust","exercise":"reverse-string","id":"784937180a8049f5946367600b1c6d4f","url":"https://exercism.org/tracks/rust/exercises/reverse-string","handle":"DanielSiepmann","is_requester":true,"auto_approve":false}

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rust/reverse-string/.gitignore vendored Normal file
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# Generated by Cargo
# will have compiled files and executables
/target/
**/*.rs.bk
# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
# More information here http://doc.crates.io/guide.html#cargotoml-vs-cargolock
Cargo.lock

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[dependencies]
[features]
grapheme = []
[package]
edition = "2021"
name = "reverse_string"
version = "1.2.0"

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# Help
## Running the tests
Execute the tests with:
```bash
$ cargo test
```
All but the first test have been ignored. After you get the first test to
pass, open the tests source file which is located in the `tests` directory
and remove the `#[ignore]` flag from the next test and get the tests to pass
again. Each separate test is a function with `#[test]` flag above it.
Continue, until you pass every test.
If you wish to run _only ignored_ tests without editing the tests source file, use:
```bash
$ cargo test -- --ignored
```
If you are using Rust 1.51 or later, you can run _all_ tests with
```bash
$ cargo test -- --include-ignored
```
To run a specific test, for example `some_test`, you can use:
```bash
$ cargo test some_test
```
If the specific test is ignored, use:
```bash
$ cargo test some_test -- --ignored
```
To learn more about Rust tests refer to the online [test documentation][rust-tests].
[rust-tests]: https://doc.rust-lang.org/book/ch11-02-running-tests.html
## Submitting your solution
You can submit your solution using the `exercism submit src/lib.rs Cargo.toml` command.
This command will upload your solution to the Exercism website and print the solution page's URL.
It's possible to submit an incomplete solution which allows you to:
- See how others have completed the exercise
- Request help from a mentor
## Need to get help?
If you'd like help solving the exercise, check the following pages:
- The [Rust track's documentation](https://exercism.org/docs/tracks/rust)
- The [Rust track's programming category on the forum](https://forum.exercism.org/c/programming/rust)
- [Exercism's programming category on the forum](https://forum.exercism.org/c/programming/5)
- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
## Rust Installation
Refer to the [exercism help page][help-page] for Rust installation and learning
resources.
## Submitting the solution
Generally you should submit all files in which you implemented your solution (`src/lib.rs` in most cases). If you are using any external crates, please consider submitting the `Cargo.toml` file. This will make the review process faster and clearer.
## Feedback, Issues, Pull Requests
The GitHub [track repository][github] is the home for all of the Rust exercises. If you have feedback about an exercise, or want to help implement new exercises, head over there and create an issue. Members of the rust track team are happy to help!
If you want to know more about Exercism, take a look at the [contribution guide].
## Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.
[help-page]: https://exercism.org/tracks/rust/learning
[github]: https://github.com/exercism/rust
[contribution guide]: https://exercism.org/docs/community/contributors

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# Reverse String
Welcome to Reverse String on Exercism's Rust Track.
If you need help running the tests or submitting your code, check out `HELP.md`.
## Introduction
Reversing strings (reading them from right to left, rather than from left to right) is a surprisingly common task in programming.
For example, in bioinformatics, reversing the sequence of DNA or RNA strings is often important for various analyses, such as finding complementary strands or identifying palindromic sequences that have biological significance.
## Instructions
Your task is to reverse a given string.
Some examples:
- Turn `"stressed"` into `"desserts"`.
- Turn `"strops"` into `"sports"`.
- Turn `"racecar"` into `"racecar"`.
## Bonus
Test your function on this string: `uüu` and see what happens. Try to write a function that properly
reverses this string. Hint: grapheme clusters
To get the bonus test to run, remove the ignore flag (`#[ignore]`) from the
last test, and execute the tests with:
```bash
$ cargo test --features grapheme
```
You will need to use external libraries (a `crate` in rust lingo) for the bonus task. A good place to look for those is [crates.io](https://crates.io/), the official repository of crates.
[Check the documentation](https://doc.rust-lang.org/cargo/guide/dependencies.html) for instructions on how to use external crates in your projects.
## Source
### Created by
- @coriolinus
### Contributed to by
- @cbzehner
- @ccouzens
- @cwhakes
- @efx
- @ErikSchierboom
- @hunger
- @lutostag
- @ocstl
- @PaulT89
- @petertseng
- @rofrol
- @rrredface
- @stringparser
- @TheDarkula
- @xakon
- @ZapAnton
### Based on
Introductory challenge to reverse an input string - https://medium.freecodecamp.org/how-to-reverse-a-string-in-javascript-in-3-different-ways-75e4763c68cb

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pub fn reverse(input: &str) -> String {
todo!("Write a function to reverse {input}");
}

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#[test]
fn an_empty_string() {
let input = "";
let output = reverse_string::reverse(input);
let expected = "";
assert_eq!(output, expected);
}
#[test]
#[ignore]
fn a_word() {
let input = "robot";
let output = reverse_string::reverse(input);
let expected = "tobor";
assert_eq!(output, expected);
}
#[test]
#[ignore]
fn a_capitalized_word() {
let input = "Ramen";
let output = reverse_string::reverse(input);
let expected = "nemaR";
assert_eq!(output, expected);
}
#[test]
#[ignore]
fn a_sentence_with_punctuation() {
let input = "I'm hungry!";
let output = reverse_string::reverse(input);
let expected = "!yrgnuh m'I";
assert_eq!(output, expected);
}
#[test]
#[ignore]
fn a_palindrome() {
let input = "racecar";
let output = reverse_string::reverse(input);
let expected = "racecar";
assert_eq!(output, expected);
}
#[test]
#[ignore]
fn an_even_sized_word() {
let input = "drawer";
let output = reverse_string::reverse(input);
let expected = "reward";
assert_eq!(output, expected);
}
#[test]
#[ignore]
fn wide_characters() {
let input = "子猫";
let output = reverse_string::reverse(input);
let expected = "猫子";
assert_eq!(output, expected);
}
#[test]
#[ignore]
#[cfg(feature = "grapheme")]
fn grapheme_clusters() {
let input = "uüu";
let output = reverse_string::reverse(input);
let expected = "uüu";
assert_eq!(output, expected);
}