class RuboCop::StringUtil::Jaro

def compute_distance
  common_chars_a, common_chars_b = find_common_characters
  matched_count = common_chars_a.size
  return 0.0 if matched_count.zero?
  transposition_count =
    count_transpositions(common_chars_a, common_chars_b)
  sum = (matched_count / shorter.size.to_f) +
        (matched_count / longer.size.to_f) +
        ((matched_count - transposition_count / 2) / matched_count.to_f)
  sum / 3.0
end