Implement a generalized FizzBuzz, FooBaz, such that FooBaz((1..100), {3 => "Fizz", 5 => "Buzz"}) is equivalent to FizzBuzz.

gistfile1.rb

class FooBaz
  attr_reader :replacements, :range

  def initialize range, replacements
    @range = range
    @replacements = replacements
  end

  def call
    range.each do |number|
      puts substitute number
    end
  end

  private
  def substitute n
    replacement = replacement_for n
    replacement.empty? ? n : replacement
  end

  def replacement_for n
    replacements.map { |divisor, replacement|
      replacement if (n % divisor).zero?
    }.join
  end

end

def FooBaz range=(1..100), replacements={3 => "Fizz", 5 => "Buzz"}
  FooBaz.new(range, replacements).()
end