Other languages would have to resort to Inheritance for this, ie. define the method in a class and force users to extend that.

其他编程语言可能要使用继承才能做到：比如在类中定义方法并强迫用户扩展这个方法。

youdao

Other languages would have to resort to Inheritance for this, ie. define the method in a class and force users to extend that.

其他编程语言可能要使用继承才能做到：比如在类中定义方法并强迫用户扩展这个方法。

youdao