=begin
We required a module for patients control on a clinic. All patients must register upon arrival the system add this patient to a queue,
display his number. Create a method for pull out.
=end
class PatientsQueue
    @q = []
  def register(patient_info)
    @q.push patient_info
    puts @q.size
  end

  def get_current_patient
    @q.shift
  end
end

=begin
Create a method that receives an array of 100,000 integers and outputs the frequency with which each integer appears in ascending order
 input: array = [1,2,4,5,6,8,2,5,3]
 output: array = [1,1] [2,2] [3,1] [4,1] [5,2] [6,1] [8,1]
=end

def get_frequency(integers)
  integers.each_with_object(Hash.new(0)) {|key, hash| hash[key] += 1}
end