Zaru.rb

zaru.rb

class Zaru
  @residues = []
  attr_reader :hole_size, :residues

  def initialize(hole_size)
    @hole_size = hole_size
  end

  def put(objects)
    passes = []
    objects.each { |object|
      (pass_through?(object) ? passes : @residues) << object
    }
    passes
  end

  def pass_through?(object)
    object.fluid? || object.size < hole_size
  end
end