Scrabble Scorer

scrabble_scorer.rb

def score(str)
  dictionary = { "A" => 1, "E" => 1, "I" => 1, "O" => 1, "U" => 1, "L" => 1,
             "N" => 1, "R" => 1, "S" => 1, "T" => 1, "D" => 2, "G" => 2,
             "B" => 3, "C" => 3, "M" => 3, "P" => 3, "F" => 4, "H" => 4,
             "V" => 4, "W" => 4, "Y" => 4, "K" => 5, "J" => 8, "X" => 8,
             "Q" => 10, "Z" => 10 }
  split_string = str.upcase.split("")
  sum = []
  split_string.each do |i|
    sum << dictionary[i]
  end
  sum = sum.compact
  sum.inject(:+)
end