class

Java extension/abstraction/implementation question.

I have three classes (class A, class B, and class C). Class A calls an instance of B and runs start(). Class B extends Thread, so when start() is called, anything in the run() method is executed. In the run() thread, there is an instance of class C. Is there anyway to allow a method in Class C to call a method in Class A, without ins...

Calling a function in jquery click event when using classes

Hey. Let's say I have this: test = function() { this.init = function() { $("#someElement").html("Hey!").mousedown(function() { $(this).html("Clicked"); /* Now, if I wanted it to call function "dosomething" defined in the class, how would I do that? this.dosomething() obviously doesn't work. */ }); } this.dosome...

Ruby symbol to class

Is there a way in Ruby to take a symbol or string and turn it into a class of the same name? For instance, if I have a class such as class Bob def talk puts "Hi, I'm bob" end end And a method I have somewhere else in the code is passed a symbol :bob, can I in some way turn that into the class Bob? Maybe something like b = ...

Tool to coalesce Base and Derived C# Classes

Does anyone know of a tool or VS add-in that will allow me to take a base class and a derived class, and collapse them into a single 'flattened' class? Or is this too difficult an operation, given the need to cope with resolving overriden and hidden/new members? Background: I am working on a project where we have a base class and a sing...

Multiple threads in Java causing problems.

Sorry for another vague example...but I have a single class where I'm starting a new thread instance. However, if I add a new thread instance, it interrupts (destroys?) the first. But, if I run two instances of the class (separately, after I turn them into jar files) where each instance only opens up a single thread, they both run concu...

How can I fix Grails error: "No domain class found for name PrivacyOptions. Please try again and enter a valid domain class name"

I'm just getting started with Groovy/Grails. I added a new domain controller to my project, and generate-controller doesn't like it. There are other indications something's wrong: If I run the app no table is actually created in the database for this. I've reduced the DomainController to one String field and no constraints, just to m...

How do you declare inheritance from a more than one entity (a class and one or more interfaces) in VB.NET?

I can't get a handle on the syntax. Can anyone give me a simple demo? ...

Setting a variable based on CSS class in jQuery

Still trying to figure out idiomatic jQuery - here's some jQuery for setting a variable base on the class of a div - is there a jQuery way of doing this more compactly, given that the div in question may have more than one class ... var currentType = 'component'; // text_component, image_component, tagged_component if ($(my_div).hasClas...

Generating a class from an object (JavaScript)

I'm trying to generate a class from an object in JavaScript. For example: var Test = { constructor: function() { document.writeln('test 1'); }, method: function() { document.writeln('test 2'); } }; var TestImpl = function() { }; TestImpl.prototype.constructor = Test.constructor; TestImpl.prototype.method = Test.method; var x =...

Simple C# Question: Nesting Classes, Accessibility

I know this is probably simple, but I can't seem to figure out if it's possible to do this. I have the following code: public class A { thisMethod(); public class B { someMethod(); } } public class C { A myA = new A(); A.B.someMethod(); } Why can't I access B if I've already instantiated A? THan...

Make persistent a DAO recordset in a class module

I am filtering a DAO recordset for sub-results as part of a set of recursive tasks. I'm trying to speed the routine, and I can see the recordset is being opened fresh every time the class object is instantiated. This step happens many hundreds of times. Isn't there a way to re-use it? The keyword here is persistence, isn't it? I'v...

default visibility of C++ class/struct members

In C++, why is private the default visibility for members of classes, but public for structs? ...

Why do I need a wrapping class? c#

I have a program of some length, with a class and many methods. All of these have to be contained in one huge class that wraps the entire file except the using statements. The necessity of that huge wrapping class seems pointless, is this used only later when making a program with multiple files? using System; using System.IO; ...

C# inherited protected method implementing interface

I have this class/interface definitions in C# public class FooBase { ... protected bool Bar() { ... } ... } public interface IBar { bool Bar(); } Now I want to create a class Foo1 derived from FooBase implementing IBar: public class Foo1 : FooBase, IBar { } Is there some class declaration magic that the compiler ta...

Difference between returning modified class and using type().

I guess it's more of a python question than a django one, but I couldn't replicate this behavior anywhere else, so I'll use exact code that doesn't work as expected. I was working on some dynamic forms in django, when I found this factory function snippet: def get_employee_form(employee): """Return the form for a specific Board."""...

ActionScript 3 MovieClip class linkage

Hi, I'm simply playing around with basic ActionScript 3 using Flash CS3 Pro. I put in a keyframe this very simple code to duplicate n "brander" symbols: for (var i:Number=0; i<20; i++) { var m = new brander("MS_"+i); addChild(m); m.name = "MS_"+i; m.x = 20*i; m.alpha = a; a-=0.05; m.y = 20; } The symbol is...

Ruby: Inherit code that works with class variables

The situation: I have multiple classes that should each hold a variable with a configuration hash; a different hash for each class but the same for all instances of a class. At first, i tried like this class A def self.init config @@config = config end def config @@config end end class B < A; end class C < A; end Bu...

Limit instances creation of a class?

I am using C#. I have created a class which can be included in any c#.net project (desktop or web based), but I want that only 10 objects will be created in that application of my class. If object instances created more than 10 then it should give an error or simple will not work. There can be two situations, I'll included myclass.cs...

initialize a class by string variable in c#?

Hi, is it possible to initialize a class by a string variable? I have code in PHP. <?php $classname = "test"; $oTest = new $classname(); class test{ } ?> how do I do this in c#? ...

C++ Class forward declaration drawbacks?

Hi! I want to use forward declaration of a class in my software, so I can have typedefs and use them inside the class full declaration. Smth like this: class myclass; typedef boost::shared_ptr<myclass> pmyclass; typedef std::list<pmyclass > myclasslist; class myclass : public baseclass { private: // private member declaration...