Initial commit

elixir/darts/lib/darts.ex

@@ -0,0 +1,17 @@
+defmodule Darts do
+  @type position :: {number, number}
+
+  @doc """
+  Calculate the score of a single dart hitting a target
+  """
+  @spec score(position) :: integer
+  def score({x, y}) do
+    in_radius = (x ** 2 + y ** 2) ** 0.5
+    cond do
+      in_radius <= 1 -> 10
+      in_radius <= 5 -> 5
+      in_radius <= 10 -> 1
+      true -> 0
+    end
+  end
+end