scrabble.ex

defmodule Scrabble do
  def score(nil), do: 0
  def score(""), do: 0
  def score("A"), do: 1
  def score("B"), do: 3
  def score("C"), do: 3
  def score("D"), do: 2
  def score("E"), do: 1
  def score("F"), do: 4
  def score("G"), do: 2
  def score("H"), do: 4
  def score("I"), do: 1
  def score("J"), do: 8
  def score("K"), do: 5
  def score("L"), do: 1
  def score("M"), do: 3
  def score("N"), do: 1
  def score("O"), do: 1
  def score("P"), do: 3
  def score("Q"), do: 10
  def score("R"), do: 1
  def score("S"), do: 1
  def score("T"), do: 1
  def score("U"), do: 1
  def score("V"), do: 4
  def score("W"), do: 4
  def score("X"), do: 8
  def score("Y"), do: 4
  def score("Z"), do: 10

  def score(word) do
    word
    |> String.upcase
    |> String.split("")
    |> Enum.map(&(score(&1)))
    |> Enum.sum
  end

end