Exercism track submissions
space age
+328
+39
rust/space-age/.exercism/config.json
+39
rust/space-age/.exercism/config.json
···
1
+
{
2
+
"blurb": "Given an age in seconds, calculate how old someone is in terms of a given planet's solar years.",
3
+
"authors": [
4
+
"IanWhitney"
5
+
],
6
+
"contributors": [
7
+
"ashleygwilliams",
8
+
"bobahop",
9
+
"coriolinus",
10
+
"cwhakes",
11
+
"durka",
12
+
"eddyp",
13
+
"efx",
14
+
"ErikSchierboom",
15
+
"IanWhitney",
16
+
"joshgoebel",
17
+
"lutostag",
18
+
"nfiles",
19
+
"ocstl",
20
+
"petertseng",
21
+
"rofrol",
22
+
"stringparser",
23
+
"xakon",
24
+
"ZapAnton"
25
+
],
26
+
"files": {
27
+
"solution": [
28
+
"src/lib.rs"
29
+
],
30
+
"test": [
31
+
"tests/space-age.rs"
32
+
],
33
+
"example": [
34
+
".meta/example.rs"
35
+
]
36
+
},
37
+
"source": "Partially inspired by Chapter 1 in Chris Pine's online Learn to Program tutorial.",
38
+
"source_url": "http://pine.fm/LearnToProgram/?Chapter=01"
39
+
}
+8
rust/space-age/.gitignore
+8
rust/space-age/.gitignore
+4
rust/space-age/Cargo.toml
+4
rust/space-age/Cargo.toml
+85
rust/space-age/HELP.md
+85
rust/space-age/HELP.md
···
1
+
# Help
2
+
3
+
## Running the tests
4
+
5
+
Execute the tests with:
6
+
7
+
```bash
8
+
$ cargo test
9
+
```
10
+
11
+
All but the first test have been ignored. After you get the first test to
12
+
pass, open the tests source file which is located in the `tests` directory
13
+
and remove the `#[ignore]` flag from the next test and get the tests to pass
14
+
again. Each separate test is a function with `#[test]` flag above it.
15
+
Continue, until you pass every test.
16
+
17
+
If you wish to run _only ignored_ tests without editing the tests source file, use:
18
+
19
+
```bash
20
+
$ cargo test -- --ignored
21
+
```
22
+
23
+
If you are using Rust 1.51 or later, you can run _all_ tests with
24
+
25
+
```bash
26
+
$ cargo test -- --include-ignored
27
+
```
28
+
29
+
To run a specific test, for example `some_test`, you can use:
30
+
31
+
```bash
32
+
$ cargo test some_test
33
+
```
34
+
35
+
If the specific test is ignored, use:
36
+
37
+
```bash
38
+
$ cargo test some_test -- --ignored
39
+
```
40
+
41
+
To learn more about Rust tests refer to the online [test documentation][rust-tests].
42
+
43
+
[rust-tests]: https://doc.rust-lang.org/book/ch11-02-running-tests.html
44
+
45
+
## Submitting your solution
46
+
47
+
You can submit your solution using the `exercism submit src/lib.rs` command.
48
+
This command will upload your solution to the Exercism website and print the solution page's URL.
49
+
50
+
It's possible to submit an incomplete solution which allows you to:
51
+
52
+
- See how others have completed the exercise
53
+
- Request help from a mentor
54
+
55
+
## Need to get help?
56
+
57
+
If you'd like help solving the exercise, check the following pages:
58
+
59
+
- The [Rust track's documentation](https://exercism.org/docs/tracks/rust)
60
+
- [Exercism's support channel on gitter](https://gitter.im/exercism/support)
61
+
- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
62
+
63
+
Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
64
+
65
+
## Rust Installation
66
+
67
+
Refer to the [exercism help page][help-page] for Rust installation and learning
68
+
resources.
69
+
70
+
## Submitting the solution
71
+
72
+
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.
73
+
74
+
## Feedback, Issues, Pull Requests
75
+
76
+
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!
77
+
78
+
If you want to know more about Exercism, take a look at the [contribution guide].
79
+
80
+
## Submitting Incomplete Solutions
81
+
It's possible to submit an incomplete solution so you can see how others have completed the exercise.
82
+
83
+
[help-page]: https://exercism.io/tracks/rust/learning
84
+
[github]: https://github.com/exercism/rust
85
+
[contribution guide]: https://exercism.io/docs/community/contributors
+69
rust/space-age/README.md
+69
rust/space-age/README.md
···
1
+
# Space Age
2
+
3
+
Welcome to Space Age on Exercism's Rust Track.
4
+
If you need help running the tests or submitting your code, check out `HELP.md`.
5
+
6
+
## Instructions
7
+
8
+
Given an age in seconds, calculate how old someone would be on:
9
+
10
+
- Mercury: orbital period 0.2408467 Earth years
11
+
- Venus: orbital period 0.61519726 Earth years
12
+
- Earth: orbital period 1.0 Earth years, 365.25 Earth days, or 31557600 seconds
13
+
- Mars: orbital period 1.8808158 Earth years
14
+
- Jupiter: orbital period 11.862615 Earth years
15
+
- Saturn: orbital period 29.447498 Earth years
16
+
- Uranus: orbital period 84.016846 Earth years
17
+
- Neptune: orbital period 164.79132 Earth years
18
+
19
+
So if you were told someone were 1,000,000,000 seconds old, you should
20
+
be able to say that they're 31.69 Earth-years old.
21
+
22
+
If you're wondering why Pluto didn't make the cut, go watch [this
23
+
youtube video](http://www.youtube.com/watch?v=Z_2gbGXzFbs).
24
+
25
+
Some Rust topics you may want to read about while solving this problem:
26
+
27
+
- Traits, both the From trait and implementing your own traits
28
+
- Default method implementations for traits
29
+
- Macros, the use of a macro could reduce boilerplate and increase readability
30
+
for this exercise. For instance,
31
+
[a macro can implement a trait for multiple types at once](https://stackoverflow.com/questions/39150216/implementing-a-trait-for-multiple-types-at-once),
32
+
though it is fine to implement `years_during` in the Planet trait itself. A macro could
33
+
define both the structs and their implementations. Info to get started with macros can
34
+
be found at:
35
+
36
+
- [The Macros chapter in The Rust Programming Language](https://doc.rust-lang.org/stable/book/ch19-06-macros.html)
37
+
- [an older version of the Macros chapter with helpful detail](https://doc.rust-lang.org/1.30.0/book/first-edition/macros.html)
38
+
- [Rust By Example](https://doc.rust-lang.org/stable/rust-by-example/macros.html)
39
+
40
+
## Source
41
+
42
+
### Created by
43
+
44
+
- @IanWhitney
45
+
46
+
### Contributed to by
47
+
48
+
- @ashleygwilliams
49
+
- @bobahop
50
+
- @coriolinus
51
+
- @cwhakes
52
+
- @durka
53
+
- @eddyp
54
+
- @efx
55
+
- @ErikSchierboom
56
+
- @IanWhitney
57
+
- @joshgoebel
58
+
- @lutostag
59
+
- @nfiles
60
+
- @ocstl
61
+
- @petertseng
62
+
- @rofrol
63
+
- @stringparser
64
+
- @xakon
65
+
- @ZapAnton
66
+
67
+
### Based on
68
+
69
+
Partially inspired by Chapter 1 in Chris Pine's online Learn to Program tutorial. - http://pine.fm/LearnToProgram/?Chapter=01
+63
rust/space-age/src/lib.rs
+63
rust/space-age/src/lib.rs
···
1
+
// The code below is a stub. Just enough to satisfy the compiler.
2
+
// In order to pass the tests you can add-to or change any of this code.
3
+
4
+
#[derive(Debug)]
5
+
pub struct Duration(f64);
6
+
7
+
impl From<u64> for Duration {
8
+
fn from(s: u64) -> Self {
9
+
Duration(((s as f64 / 31557600_f64) * 100.0).round() / 100.0)
10
+
}
11
+
}
12
+
13
+
pub trait Planet {
14
+
fn years_during(d: &Duration) -> f64 {
15
+
d.0
16
+
}
17
+
}
18
+
19
+
pub struct Mercury;
20
+
pub struct Venus;
21
+
pub struct Earth;
22
+
pub struct Mars;
23
+
pub struct Jupiter;
24
+
pub struct Saturn;
25
+
pub struct Uranus;
26
+
pub struct Neptune;
27
+
28
+
impl Planet for Mercury {
29
+
fn years_during(d: &Duration) -> f64 {
30
+
d.0 / 0.2408467
31
+
}
32
+
}
33
+
impl Planet for Venus {
34
+
fn years_during(d: &Duration) -> f64 {
35
+
d.0 / 0.61519726
36
+
}
37
+
}
38
+
impl Planet for Earth {}
39
+
impl Planet for Mars {
40
+
fn years_during(d: &Duration) -> f64 {
41
+
d.0 / 1.8808158
42
+
}
43
+
}
44
+
impl Planet for Jupiter {
45
+
fn years_during(d: &Duration) -> f64 {
46
+
d.0 / 11.862615
47
+
}
48
+
}
49
+
impl Planet for Saturn {
50
+
fn years_during(d: &Duration) -> f64 {
51
+
d.0 / 29.447498
52
+
}
53
+
}
54
+
impl Planet for Uranus {
55
+
fn years_during(d: &Duration) -> f64 {
56
+
d.0 / 84.016846
57
+
}
58
+
}
59
+
impl Planet for Neptune {
60
+
fn years_during(d: &Duration) -> f64 {
61
+
d.0 / 164.79132
62
+
}
63
+
}
+60
rust/space-age/tests/space-age.rs
+60
rust/space-age/tests/space-age.rs
···
1
+
use space_age::*;
2
+
3
+
fn assert_in_delta(expected: f64, actual: f64) {
4
+
let diff: f64 = (expected - actual).abs();
5
+
let delta: f64 = 0.01;
6
+
if diff > delta {
7
+
panic!(
8
+
"Your result of {} should be within {} of the expected result {}",
9
+
actual, delta, expected
10
+
)
11
+
}
12
+
}
13
+
14
+
#[test]
15
+
fn earth_age() {
16
+
let duration = Duration::from(1_000_000_000);
17
+
assert_in_delta(31.69, Earth::years_during(&duration));
18
+
}
19
+
20
+
#[test]
21
+
fn mercury_age() {
22
+
let duration = Duration::from(2_134_835_688);
23
+
assert_in_delta(280.88, Mercury::years_during(&duration));
24
+
}
25
+
26
+
#[test]
27
+
fn venus_age() {
28
+
let duration = Duration::from(189_839_836);
29
+
assert_in_delta(9.78, Venus::years_during(&duration));
30
+
}
31
+
32
+
#[test]
33
+
fn mars_age() {
34
+
let duration = Duration::from(2_129_871_239);
35
+
assert_in_delta(35.88, Mars::years_during(&duration));
36
+
}
37
+
38
+
#[test]
39
+
fn jupiter_age() {
40
+
let duration = Duration::from(901_876_382);
41
+
assert_in_delta(2.41, Jupiter::years_during(&duration));
42
+
}
43
+
44
+
#[test]
45
+
fn saturn_age() {
46
+
let duration = Duration::from(2_000_000_000);
47
+
assert_in_delta(2.15, Saturn::years_during(&duration));
48
+
}
49
+
50
+
#[test]
51
+
fn uranus_age() {
52
+
let duration = Duration::from(1_210_123_456);
53
+
assert_in_delta(0.46, Uranus::years_during(&duration));
54
+
}
55
+
56
+
#[test]
57
+
fn neptune_age() {
58
+
let duration = Duration::from(1_821_023_456);
59
+
assert_in_delta(0.35, Neptune::years_during(&duration));
60
+
}