Ruby单例方法和实例方法

#单例方法：对象的实例方法，其只属于具体类实例对象

#实例方法，属于类的每个实例对象。单例方法只出现在单个实例对象中

class Person
  def talk
    puts "This is a Person class."
  end
end
p1=Person.new
p2=Person.new
 #定义单例方法，首先要生成一个实例对象，其次，要在方法名前加上对象名和一个点号“.”
 def p2.talk
   puts "This talk method belongs to p2."
 end
 
 def p2.laugh
   puts "laugh method belongs to p2."
 end
 
 p1.talk #This is a Person class.
 
 p2.talk #This talk method belongs to p2.
 p2.laugh #laugh method belongs to p2.