The append_features method of Module

最新推荐文章于 2024-09-17 02:04:03 发布

最新推荐文章于 2024-09-17 02:04:03 发布 · 95 阅读

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本文探讨了Ruby中如何通过覆盖append_features方法为特定类添加来自模块的单例方法。通过具体示例代码展示了这一过程，并强调了调用super的重要性。

In the same way that the class could include some singleton methods,the Module could include some singleton methods,too.But if we implement a class which include a Module which contians some singleton methods,does these methods become to the class's singleton methods?The answer is 'no'.There is a hook called append_features that we can override.It's called with a parameter that is the destination class or module.For an example of its use,see the following codes:

ruby 代码

module MyMod
def MyMod.append_features(someClass)
def someClass.modmeth
puts "Module (class) method"
end
super
end
end
class AppendFeatures
include MyMod
def initialize
end
end
AppendFeatures.modmeth

Note:
you should call the "super" when you override the append_features method.

It's very interesting.
These code copy from the <ruby way=""> book.</ruby>