polymorphism
virtual destructor fail using array
I found this code on a web site #include <iostream> using namespace std; struct Base { Base() { cout << \"Base\" << \" \"; }[详细]
2023-04-13 06:30 分类：问答class with both abstract and virtual methods
Can I write a class which 开发者_如何学Pythonhas virtual methods - (which can be overridden but have a default behaviour) and also abstract methods - (which have to be overridden)[详细]
2023-04-13 01:24 分类：问答How can I give the type inference engine some hints?
In (very) modern GHC\'s, I can write this: {-# LANGUAGE TypeFamilies #-} -- consider this part \"library\" code, changeable at will[详细]
2023-04-12 16:46 分类：问答What is wrong with testing an object to see if it implements an interface?
In the comments of this answer it is stated that \"checking whether the object has implemented the interface , rampant as it may be, is a bad thing\"[详细]
2023-04-12 12:56 分类：问答How do I create a formtastic nested input without fieldset?
I have a table User that inherits from a table called Person Long story short, instead of having to do the following:[详细]
2023-04-12 04:52 分类：问答How would you define polymorphism to a CS 101 student? [duplicate]
This qu开发者_Python百科estion already has answers here: Closed 11 years ago. Possible Duplicate: Try to describe polymorphism as easy as you can[详细]
2023-04-11 22:51 分类：问答Overriding to_s in rails model... possible?
I\'ve got this model class Question < ActiveRecord::Base has_many :votes def to_s \"hello?\" end end and when I attempt to display a Question with <%= @qu开发者_如何学Pythonestion %>[详细]
2023-04-11 22:16 分类：问答Total function of type (forall n . Maybe (f n)) -> Maybe (forall n . (f n))
Is it possible to write an injective function of type hard :: (forall n . Maybe (f n)) -> Maybe (forall n . (f n))[详细]
2023-04-11 21:41 分类：问答Why would you declare an Interface and then instantiate an object with it in Java?
A friend and I are studying Java. We were looking at interfaces today and we got into a bit of an discussion about how interfaces are used.[详细]
2023-04-11 20:12 分类：问答Accessing subclass in base class... but different
I have a base class that has a subclass (could be a struct i suppose but not sure if it\'s appropriate) and a method.[详细]
2023-04-11 18:32 分类：问答
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
加载中,请稍侯......