65 lines
1.9 KiB
Markdown
65 lines
1.9 KiB
Markdown
# Space Age
|
|
|
|
Given an age in seconds, calculate how old someone is in terms of a given planet's solar years.
|
|
|
|
Given an age in seconds, calculate how old someone would be on:
|
|
|
|
- Earth: orbital period 365.25 Earth days, or 31557600 seconds
|
|
- Mercury: orbital period 0.2408467 Earth years
|
|
- Venus: orbital period 0.61519726 Earth years
|
|
- Mars: orbital period 1.8808158 Earth years
|
|
- Jupiter: orbital period 11.862615 Earth years
|
|
- Saturn: orbital period 29.447498 Earth years
|
|
- Uranus: orbital period 84.016846 Earth years
|
|
- Neptune: orbital period 164.79132 Earth years
|
|
|
|
So if you were told someone were 1,000,000,000 seconds old, you should
|
|
be able to say that they're 31 Earth-years old.
|
|
|
|
If you're wondering why Pluto didn't make the cut, go watch [this
|
|
youtube video](http://www.youtube.com/watch?v=Z_2gbGXzFbs).
|
|
|
|
## Running tests
|
|
|
|
Execute the tests with:
|
|
|
|
```bash
|
|
$ elixir bob_test.exs
|
|
```
|
|
|
|
(Replace `bob_test.exs` with the name of the test file.)
|
|
|
|
|
|
### Pending tests
|
|
|
|
In the test suites, all but the first test have been skipped.
|
|
|
|
Once you get a test passing, you can unskip the next one by
|
|
commenting out the relevant `@tag :pending` with a `#` symbol.
|
|
|
|
For example:
|
|
|
|
```elixir
|
|
# @tag :pending
|
|
test "shouting" do
|
|
assert Bob.hey("WATCH OUT!") == "Whoa, chill out!"
|
|
end
|
|
```
|
|
|
|
Or, you can enable all the tests by commenting out the
|
|
`ExUnit.configure` line in the test suite.
|
|
|
|
```elixir
|
|
# ExUnit.configure exclude: :pending, trace: true
|
|
```
|
|
|
|
For more detailed information about the Elixir track, please
|
|
see the [help page](http://exercism.io/languages/elixir).
|
|
|
|
## Source
|
|
|
|
Partially inspired by Chapter 1 in Chris Pine's online Learn to Program tutorial. [http://pine.fm/LearnToProgram/?Chapter=01](http://pine.fm/LearnToProgram/?Chapter=01)
|
|
|
|
## Submitting Incomplete Problems
|
|
It's possible to submit an incomplete solution so you can see how others have completed the exercise.
|
|
|