PseudoRandomnessExample.rb

class PseudoRandomness

  # This is the constructor used to instantiate a PseudoRandomness object
  def initialize(seed)
    @instance_seed = seed
  end

  def change_seed
    @instance_seed = @instance_seed + 1
  end

  def generate_pseudo_random_value
    # That is the evil mathematics part : Multiply the seed by 2
    pseudo_random_value = 2 * @instance_seed

    # Here we modify the seed : Increment it
    change_seed

    return pseudo_random_value
  end
end

# We instantiate a new random number generator
random_generator = PseudoRandomness.new(5)

# Now we generate 3 new pseudo random values
3.times { puts random_generator.generate_pseudo_random_value }

# We change the seed and generate 3 new random values
random_generator.change_seed

3.times { puts random_generator.generate_pseudo_random_value }