overriding

Overriding and Inheritance in C#

由 百般思念 提交于 2019-11-27 03:46:06
问题 Ok, bear with me guys and girls as I'm learning. Here's my question. I can't figure out why I can't override a method from a parent class. Here's the code from the base class (yes, I pilfered the java code from an OOP book and am trying to rewrite it in C#). using System; public class MoodyObject { protected String getMood() { return "moody"; } public void queryMood() { Console.WriteLine("I feel " + getMood() + " today!"); } } and here are my other 2 objects that inherit the base class

Java: Overriding function to disable SSL certificate check

由 南楼画角 提交于 2019-11-27 03:27:53
The web service is rest over SSL and it has self signed certificate, hosted in remote system.I have already created a client accessing that web service. This is done by adding the certificate to the key store programatically . Now I heard that, it is not necessary to add certificate to key store for accesing a self signed web service. Instead we can disable the certificate check by overriding some methods. Is this true? Which are those methods? Please help. This should be sufficient. I use this when testing code against testing and staging servers where we don't have properly signed

Overriding methods in Javascript

由 假装没事ソ 提交于 2019-11-27 03:27:50
问题 I would like to know what is the difference between overriding methods with prototypes and without prototypes. Consider: Example 1: function Animal() { this.sleep = function () { alert("animal sleeping"); }; this.eat = function () { alert("animal eating"); }; } function Dog() { this.eat = function () { alert("Dog eating"); }; } Dog.prototype = new Animal; var dog = new Dog; dog.eat(); Example 2: function Animal() { } function Dog() { } Animal.prototype.sleep = function () { alert("animal

How can I override the toString method of an ArrayList in Java?

由 笑着哭i 提交于 2019-11-27 03:23:58
问题 I would like to have my own implementation of the toString() method for an ArrayList in Java. However, I can't get it working even though I added my toString() like this to the class that contains the ArrayList. @Override public String toString() { String result = "+"; for (int i = 0; i < list.size(); i++) { result += " " + list.get(i); } return result; } When I call my ArrayList like this list.toString() , I still get the default representation. Am I missing something? 回答1: You should do

Overriding GetHashCode for mutable objects?

由 删除回忆录丶 提交于 2019-11-27 03:10:47
I've read about 10 different questions on when and how to override GetHashCode but there's still something I don't quite get. Most implementations of GetHashCode are based on the hash codes of the fields of the object, but it's been cited that the value of GetHashCode should never change over the lifetime of the object. How does that work if the fields that it's based on are mutable? Also what if I do want dictionary lookups etc to be based on reference equality not my overridden Equals ? I'm primarily overriding Equals for the ease of unit testing my serialization code which I assume

What does @AttributeOverride mean?

由 南笙酒味 提交于 2019-11-27 03:03:20
问题 I'm currently coming (back) up to speed with EJB and while I was away it changed drastically (so far for the better). However, I've come across a concept that I am struggling with and would like to understand better as it seems to be used in our (where I work, not me and all the voices in my head) code quite a bit. Here's the example I've found in a book. It's part of an example showing how to use the @EmbeddedId annotation: @Entity public class Employee implements java.io.Serializable {

How to prevent a function from being overridden in python [duplicate]

由 孤者浪人 提交于 2019-11-27 03:03:09
问题 This question already has an answer here: Making functions non override-able 5 answers Is there a way to make a class function unoverriddable? something like java's final keyword. i.e, any overriding class cannot override that method. 回答1: The issue is you are trying to write in Python using Java philosophies. Some thing carry over, but not all of them. In Python you can do the following and it is perfectly fine, but completely goes against how Java thinks of objects. class Thing(object): x =

How to override the properties of a CSS class using another CSS class

由 安稳与你 提交于 2019-11-27 02:53:34
I am fairly new to CSS3 and I want to be able to do the following: When I add a class into a an element, it overrides the properties of another class used in this specific element. Let's say that I have <a class="left carousel-control" href="#carousel" data-slide="prev"> I want to be able to add a class called bakground-none , that will over override the default background in the class left . Thanks! Jukka K. Korpela There are different ways in which properties can be overridden. Assuming you have .left { background: blue } e.g. any of the following would override it: a.background-none {

Override rails helpers with access to original

由 那年仲夏 提交于 2019-11-27 02:34:25
问题 I want to use rails' familiar helpers, but with slightly altered functionality. The way I see it, I want to be able to do something like: module AwesomeHelper #... create alias of stylesheet_link_tag to old_stylesheet_link_tag def stylesheet_link_tag(*args) if @be_awesome awesome_stylesheet_link_tag *args else old_stylesheet_link_tag *args end end end The way I see it, I have three options: Monkey patching: Reopening the rails helper module. If the rails team ever change the name of their

Is there a way to prevent a method from being overridden in subclasses?

由 …衆ロ難τιáo~ 提交于 2019-11-27 02:04:36
问题 Is anyone aware of a language feature or technique in C++ to prevent a child class from over riding a particular method in the parent class? class Base { public: bool someGuaranteedResult() { return true; } }; class Child : public Base { public: bool someGuaranteedResult() { return false; /* Haha I broke things! */ } }; Even though it's not virtual, this is still allowed (at least in the Metrowerks compiler I'm using), all you get is a compile time warning about hiding non-virtual inherited
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