There are many tales of programmers having created deep inheritance structures that became unmanageable during subsequent maintenance cycles; this may account for why it has fallen out of favor among scholars. 11. See “The diamond problem” section at www.geeksforgeeks.org/multiple-inheritance-in-...
https://www.geeksforgeeks.org/difference-between-dir-and-vars-in-python/ vars(node) 只返回当前节点属性 dir(node) 不仅仅返回当前节点属性,还返回node节点的所有父亲节点的属性。 dir() Function: This function displays more attributes than vars() function, as it is not limited to an instance. It...
In the above program, constructor of ‘Person’ is called once. One important thing to note in the above output is, the default constructor of ‘Person’ is called. When we use ‘virtual’ keyword, the default constructor of grandparent class is called by default even if the parent classes...