I have a few models that need to have custom find conditions placed on them. For example, if I have a Contact model, every time Contact.find is called, I want to restrict the contacts returned that only belong to the Account in use. I found this via Google (which I've customized a little): def self.find(*args) with_scope(:find => { ...
I want to extend the basic ControlCollection in VB.NET so I can just add images and text to a self-made control, and then automaticly convert them to pictureboxes and lables. So I made a class that inherits from ControlCollection, overrided the add method, and added the functionality. But when I run the example, it gives a NullReferenc...
I need to cleanup the HTML of pasted text into TinyMCE by passing it to a webservice and then getting it back into the textarea. So I need to override the Ctrl+V in TinyMCE to caputre the text, do a background request, and on return continue with whatever the paste handler was for TinyMCE. First off, where is TinyMCE's Ctrl+V handler, an...
When should one do the following? class Foo : Control { protected override void OnClick(EventArgs e) { // new code here } } As opposed to this? class Foo : Control { public Foo() { this.Click += new EventHandler(Clicked); } private void Clicked(object sender, EventArgs e) { // ...
Please consider this example class: [Serializable] public class SomeClass { private DateTime _SomeDateTime; public DateTime SomeDateTime { get { return _SomeDateTime; } set { _SomeDateTime = value; } } } I would like to alter the serialization of any DateTime declared in the class according to my own rules. ...
Can i override fetchall method in a model? I need to check sth everytime fetchAll is called. The model extends Zend_db_table_abstract ...
There's something I want to customize in the System.Web.Script.Services.ScriptHandlerFactory and other .NET stuff inside an internal class. Unfortunately, it's an internal class. What options do I have when trying to customize a method in this class? ...
Consider the following interface in Java: public interface I { public final String KEY = "a"; } And the following class: public class A implements I { public String KEY = "b"; public String getKey() { return KEY; } } Why is it possible for class A to come along and override interface I's final constant? Tr...
Can anyone tell me why this code behaves the way it does? See comments embedded in the code... Am I missing something really obvious here? using System; namespace ConsoleApplication3 { public class Program { static void Main(string[] args) { var c = new MyChild(); c.X(); Conso...
Hi everybody, I'm having a small problem in Java. I have an interface called Modifiable. Objects implementing this interface are Modifiable. I also have a ModifyCommand class (with the Command pattern) that receive two Modifiable objects (to swap them in a list further on - that's not my question, I designed that solution already). Th...
I don't think this is possible, but if is then I need it :) I have a auto-generated proxy file from the wsdl.exe command line tool by Visual Studio 2008. The proxy output is partial classes. I want to override the default constructor that is generated. I would rather not modify the code since it is auto-generated. I tried making anoth...
Im developing a "desktop" for WM6+ and i was wondering if i can override the draw that WM does when it starts the OS (like the start menu, softkey bar, and background) basically have my program draw the today screen instead of windows. My program will of course integrate everything that the original "screen" integrated. C++ ...
Howdy, I have a public static class in which I would like to have a ToString() method. I have defined it as public static string ToString(), but get the following warning: 'Class.ToString()' hides inherited member 'object.ToString()'. To make the current member override that implementation, add the override keyword. Otherwi...
I found one source which successfully overrode Time.strftime like this: class Time alias :old_strftime :strftime def strftime #do something old_strftime end end The trouble is, strftime is an instance method. I need to override Time.now - a class method - in such away that any caller gets my new method, while the new me...
(The answer to this, if there is one, is probably out there already, but I lack the proper terminology.) I have a function, a(), that I want to override, but also have the original a() be performed in an order depending on the context. For example, sometimes when I'm generating a page I'll want to override like this: function a() { ...
Just came across this quote in a book on OOP that I'm reading, A child is only allowed to augment functionality and add functionality. A child is never allowed to remove functionality. If you do find that a child need to remove functionality, this is an indication that the child should appear before the parent in the ...
Given the following class public class Foo { public int FooId { get; set; } public string FooName { get; set; } public override bool Equals(object obj) { Foo fooItem = obj as Foo; return fooItem.FooId == this.FooId; } public override int GetHashCode() { // Which is preferred? ...
I have a base class with a virtual method, and multiple subclasses that override that method. When I encounter one of those subclasses, I would like to call the overridden method, but without knowledge of the subclass. I can think of ugly ways to do this (check a value and cast it), but it seems like there should be an in-language way t...
Hi, I'm trying to create an overridden operator function using both const parameters, but I can't figure out how to do it. Here is a simple example: class Number { Number() { value = 1; }; inline Number operator + (const Number& n) { Number result; result.value = value + n.value; re...
Yes, I do understand the difference between them. What I want to know is: why OVERRIDE a method? What is the good in doing it? In case of overload: the only advantage is you haven't to think in different names to functions? ...