Is there a way to do this: I need to develop the easiest way to support registering to property changes of some class. Apart from manual way of adding INotifyProperyChanged support, is there a way to do it like this: class Base ... // all notification logic here class Child { public string Name { get; set; } public int SomeNu...
Right now in some Java code I have something like this class A { void f() { } A() { f(); } } class B extends A{ @Override void f() { //do some stuff super.f(); } } class C extends B { @Override void f() { //do some stuff super.f(); } } I want to have f() called and then iterate upwards through each parent class,...
I have multiple objects in a hierarchy which have common properties and methods inherited from the superclass, and object-specific properties and methods in the subclasses. I'm still new to OOP javascript, so there is probably a much better approach to this. I'm using jQuery for the AJAX, but not sure if that makes any difference. fun...
We use a pesonal design to store modified rows. For the data we need to keep, we use 2 tables; the first with fields that don't change, the second uses soft delete. +----------+ +---------------+ | TableBase| | Table | +==========+ +===============+ | Id | | TableId | | FieldA | | Id | +--------...
I define how two functions can inherit from each other as follows: Function.prototype.inherit = function(parent){ function proto() {} proto.prototype = parent.prototype; this.prototype = new proto(); this.prototype.constructor = this; this.prototype.parent = parent; } I then need to define an isInstance function that would behave l...
Assuming both objects are not value types and both represent types which have overridden the Equals(...) method, is there any functional difference between: Calling obj1.Equals(obj2) Calling Object.Equals(obj1, obj2) ...or are they functionally the same? The Apress book I'm reading (Pro C# 2008), which is actually quite good, refers ...
Here is an overly simplistic example for illustration: I can encapsulate an implementation detail such as using an atom for a counter: (defn make-counter ([] (make-counter 0)) ([init-val] (let [c (atom init-val)] {:get (fn [] @c) :++ (fn [] (swap! c inc))}))) But that means I need to redefine everything to add a fea...
So if class C inherited from class B and has one extra property, could I create a new object of class C by passing it an object that already exists of class B and it will either leave the extra property null or run some LINQ to SQL to see what the extra property should be (such as for a counter, etc)? C c = new C(); B b = bRepo.getBbyID...
I have a timer function: # This is a class that schedules tasks. It will call it's ring() funtion # when the timer starts, and call it's running() function when within the # time limit, and call it's over() function when the time is up. # This class uses SYSTEM time. import time, threading import settings from object import Object c...
how to loop through JavaScript Array member functions, the following code doesn't work :( for (var i in Array.prototype){ alert(i) } //show nothing for (var i in []){ alert(i) } // show nothing ...
Hi all, Is it somehow possible when i add a category in my magento store, it inherits the settings of the parent category? // Roland ...
I'm trying to subclass a class with a specialisation of how I want a particular function to be performed. However, C++ implicitly converts my class to its base class when I store it in a list. Clearly the list could store any subclass of the class, so this is acceptable, but how would I go about storing the class so I can access this par...
There is any way to determine if an object is exactly a class and not a derived one of that? For instance: class A : X { } class B : A { } I can do something like this: bool isExactlyA(X obj) { return (obj is A) && !(obj is B); } Of course if there are more derived classes of A I'd have to add and conditions. ...
Hi, I have 3 non-abstract persist-able classes. MyClubUser and HisClubUser classes inherit from User class. I use one table per subclass strategy i.e. @Inheritance(strategy = InheritanceType.JOINED), for these classes. What I have observed was the generated SQL uses left outer join HisClubUser and MyClubUser when I do a query on User ...
I wanted to take advantage of SubSonic's default behavior to find the first non-key string column to use as the object description. Usually I just name that colun description and then [bracket] it in t/sql. This time I decided to name the column "Descriptor". That leads to this warning - Warning 3 'SW21Console.DAL.CompanyTable.Descr...
This seems inconsistent, but probably is due to the fact that I'm new to javascript's prototype inheritance feature. Basically, I have two base class properties, "list" and "name". I instantiate two subclasses and give values to the properties. When I instantiate the second subclass, it gets the list values from the first subclass i...
In Python I can define a class 'foo' in the following ways: class foo: pass or class foo(object): pass What is the difference? I have tried to use the function issubclass(foo, object) to see if it returns True for both class definitions. It does not. IDLE 2.6.3 >>> class foo: pass >>> issubclass(foo, obje...
I have a base type which stores information about a question in a question pool for a system which generates practice question sets to help people study for multiple choice tests. The only information that is stored in it are the answers, the prompt and question number. When I create a practice test, I need to augment the type with som...
Hi, I was thinking a scenario like that : class Utopia => A Base Class which pass it's fields and methods to derived classes. class Watashi => A derived class, derived from Utopia and inherits everything class Baka => A derived Class, Inherits some fields from Utopia There are some types above and Type Baka should inherit some speci...
The example here doesn't make sense, but this is basically how I wrote my program in Python, and I'm now rewriting it in C++. I'm still trying to grasp multiple inheritance in C++, and what I need to do here is access A::a_print from main through the instance of C. Below you'll see what I'm talking about. Is this possible? #include <ios...