sum_of_factors.rb

class SumOfFactors

  def initialize(until_num, *divisible_by)
    @until_num = until_num
    @divisible_by = divisible_by
  end

  def get_sum
    get_range.select(&self.method(:is_disivible_by))
             .inject(&self.method(:sum_arr))
  end



  private

  def sum_arr(sum, num)
    sum + num
  end

  def is_disivible_by num
    @divisible_by.any? {|divisible_by| num % divisible_by == 0 }
  end

  def get_range
    (1..@until_num)
  end

end

sum = SumOfFactors.new(100, 3, 5).get_sum
puts sum