class Employee
  # Adding methods to the singleton class of the object
  # Employee (which has the class Class).
  class << self
    def add(emp)
      puts "Adding #{emp}"
      @employees = Hash.new unless @employees
      @employees[emp.name] = emp
    end
    def get_emp_by_name name
      @employees[name]
    end
  end
  #####################################################
  attr_accessor :name, :ssid, :salary
  def initialize(name, ssid, salary)
    @name = name
    @ssid = ssid
    @salary = salary
    Employee.add self
  end
  def to_s
    @name
  end
end

alice = Employee.new("Alice Alley", 1234, 75000);
bob = Employee.new("Robert Tables", 5678, 50000);

class << bob
  def signing_bonus
    2000
  end
end

puts(bob.signing_bonus);
#puts(alice.signing_bonus);

b = Employee.get_emp_by_name "Robert Tables"
puts b.signing_bonus