1
exercism fetch haskell space-age

Space Age

Given an age in seconds, calculate how old someone would be on:

So if you were told someone were 1,000,000,000 seconds old, you should be able to say that they're 31.69 Earth-years old.

If you're wondering why Pluto didn't make the cut, go watch this youtube video.

Hints

In this exercise, we provided the definition of the algebric data type named Planet. You need to implement the ageOn function, that calculates how many years old someone would be on a Planet, given an age in seconds.

Your can use the provided signature if you are unsure about the types, but don't let it restrict your creativity:

1
ageOn :: Planet -> Float -> Float

Getting Started

For installation and learning resources, refer to the exercism help page.

Running the tests

To run the test suite, execute the following command:

1
stack test

If you get an error message like this...

1
No .cabal file found in directory

You are probably running an old stack version and need to upgrade it.

Otherwise, if you get an error message like this...

1
2
No compiler found, expected minor version match with...
Try running "stack setup" to install the correct GHC...

Just do as it says and it will download and install the correct compiler version:

1
stack setup

Running GHCi

If you want to play with your solution in GHCi, just run the command:

1
stack ghci

Feedback, Issues, Pull Requests

The exercism/haskell repository on GitHub is the home for all of the Haskell exercises.

If you have feedback about an exercise, or want to help implementing a new one, head over there and create an issue. We'll do our best to help you!

Source

Partially inspired by Chapter 1 in Chris Pine's online Learn to Program tutorial. http://pine.fm/LearnToProgram/?Chapter=01

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.