[Ruby] Define abstract methods

标签：ruby   class   methods   

Ruby has its own style to define the abstract methods in its class.

class Shape
  
  def initialize
    raise NotImplementedError.new("#{self.class.name} is an abstract class")
  end
  
  def area
    raise NotImplementedError.new("#{self.class.name} area is an abstract method ")
  end
  
end

class Square < Shape
  
  def initialize(length)
    @length = length
  end
  
  def area
    @length ** 2
  end
end

Shape.new().area

puts Square.new(10).area

[Ruby] Define abstract methods,布布扣,bubuko.com

[Ruby] Define abstract methods

标签：ruby   class   methods   

原文地址：http://blog.csdn.net/wonderfan/article/details/37383707