scrabble_score.rb

class Scrabble
  attr_reader :string, :scores, :multiplier

  def initialize(string, multiplier = :single)
    @string = string
    @multiplier = multiplier
  end

  def score
    score = 0
    string_ary = string.to_s.gsub(/\s+/, "").downcase.split("")
    string_ary.each do |char|
      score += SCORES[char]
    end
    score * MULTI[multiplier]
  end

  def self.score(str)
    Scrabble.new(str).score
  end

  SCORES = {
             ""  => 0,
             "a" => 1,
             "b" => 3,
             "c" => 3,
             "d" => 2,
             "e" => 1,
             "f" => 4,
             "g" => 2,
             "h" => 4,
             "i" => 1,
             "j" => 8,
             "k" => 5,
             "l" => 1,
             "m" => 3,
             "n" => 1,
             "o" => 1,
             "p" => 3,
             "q" => 10,
             "r" => 1,
             "s" => 1,
             "t" => 1,
             "u" => 1,
             "v" => 4,
             "w" => 4,
             "x" => 8,
             "y" => 4,
             "z" => 10
           }

  MULTI = { single: 1, double: 2, triple: 3}
end