“个人”红宝石方法 [英] "Personal" method in ruby

问题描述

我正在寻找一种使方法成为个人方法的方法-注意班级不是私人的

I'm looking for a way of making a method "personal" - note NOT PRIVATE to a class

这是一个示例-个人是指方法 foo的行为

here is an example - by "personal" I mean the behaviour of method "foo"

class A
  def foo
     "foo"
  end
end

class B < A
  def foo
      "bar"
  end
end

class C < B
end

a=A.new; b=B.new;c=C.new

我正在寻找一种产生遵循以下行为

I'm looking for a way of producing the following behaviour

a.foo #=> "foo"

b.foo #=> "bar"

c.foo #=> "foo" (ultimate base class method called)

推荐答案

创建个人方法的方法，更改继承结构。

Instead of creating 'personal' methods, change your inheritance structure.

似乎您希望C类只具有与B类相同的功能，而又不

It appears that you want the C class to have only some of the same functionality of the B class while not making changes to the A class.

class A
  def foo
     "foo"
  end
end

class BnC < A
end

class B < BnC
  def foo
      "bar"
  end
end

class C < BnC
end

a=A.new; b=B.new;c=C.new

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