class FakeRedis::SortedSetStore

def computed_values
  unless defined?(@computed_values) && @computed_values
    # Do nothing if all weights are 1, as n * 1 is n
    @computed_values = hashes if weights.all? {|weight| weight == 1 }
    # Otherwise, multiply the values in each hash by that hash's weighting
    @computed_values ||= hashes.each_with_index.map do |hash, index|
      weight = weights[index]
      Hash[hash.map {|k, v| [k, (v * weight)]}]
    end
  end
  @computed_values
end