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exercism fetch haskell all-your-base

All Your Base

Convert a number, represented as a sequence of digits in one base, to any other base.

Implement general base conversion. Given a number in base a, represented as a sequence of digits, convert it to base b.

Note

About Positional Notation

In positional notation, a number in base b can be understood as a linear combination of powers of b.

The number 42, in base 10, means:

(4 * 101) + (2 * 100)

The number 101010, in base 2, means:

(1 * 25) + (0 * 24) + (1 * 23) + (0 * 22) + (1 * 21) + (0 * 20)

The number 1120, in base 3, means:

(1 * 33) + (1 * 32) + (2 * 31) + (0 * 30)

I think you got the idea!

Yes. Those three numbers above are exactly the same. Congratulations!

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:

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stack test

If you get an error message like this...

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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...

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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:

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stack setup

Running GHCi

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

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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!

Submitting Incomplete Solutions

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