sum.rb

class SumOfMultiples

  def self.to(input)
    new(3,5).to(input)
  end

  def initialize(*params)
    @params = params
  end

  def to(input)
    all_multiples = []

    @params.each do |param|
      all_multiples += multiples_upto(param,input)
    end

    total(all_multiples.uniq)
  end


  def multiples_upto(multiple,input)
    all_multiples = []

    current_multiple = multiple

    while input > current_multiple
      all_multiples.push(current_multiple)
      current_multiple += multiple
    end

    all_multiples
  end

  def total(multiples)
    total = 0

    multiples.each do |multiple|
      total += multiple
    end

    total
  end


end