SumOfMultiples warmup solution

sum_of_multiples_solution

class SumOfMultiples
  def initialize(*ints)
    @numbers = ints.to_a
  end

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

  def to(max)
    multiples = collect_multiples_upto(max)
    multiples.inject(:+)
  end

  def collect_multiples_upto(max)
    multiples = []
    max.times {|int| multiples << int if is_divisor_of?(int)}
    multiples  
  end

  def is_divisor_of?(int)
    @numbers.any? {|num| int % num == 0 }
  end
end