trollcount's Introduction

Trollcount

Trollcount is a simple scala library which simulates the troll numeral system[*] according to the Discworld. It allows it's users to create troll numbers and to add them to each other. Here's an example:

scala> import se.diversify.trollcount.TrollNumber._
import se.diversify.trollcount.TrollNumber._

scala> val one = One
one: se.diversify.trollcount.TrollNumber = One

scala> val three = Three
three: se.diversify.trollcount.TrollNumber = Three

scala> three.value
res0: Int = 3

scala> val five = Many-One
five: se.diversify.trollcount.TrollNumber = Many-One

scala> val ten = five + five
ten: se.diversify.trollcount.TrollNumber = Many-Many-Two

scala> val fourteen = Many-Many-One + Many-One
fourteen: se.diversify.trollcount.TrollNumber = Many-Many-Many-Two

scala> fourteen.value
res1: Int = 14

This library exists in three branches:

master - The complete library. Use this branch if you want to see my implementation.
tests-only - Only contains tests and no implementation. Use if this branch if you want to implement the whole library logic on your own.
tests-and-stubs - Contains stub implementations and failing tests. Use this branch if you want to bootstrap your implementation and add the missing bits.

To get the code, run:

git clone git://github.com/uzilan/trollcount.git

To switch to a different branch, run:

git checkout master

or...

git checkout tests-only

or...

git checkout tests-and-stubs

Want to read more? Why not read the blog post.

[*] the troll numeral system goes like this:

One, Two, Three, Many,
Many-One, Many-Two, Many-Three, Many-Many,
Many-Many-One, Many-Many-Two, Many-Many-Three, Many-Many-Many,
Many-Many-Many-One, Many-Many-Many-Two, Many-Many-Many-Three, Lots

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