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Inheriting from a class that is based on a generic class but needs the class type of the derived class
Category : Programming Languages

I have a problem and not so sure how to solve it..

Consider the class:

public class BaseClass<T>
public T PreviousInstance { get; set; }

Now my secondary data class:

public class DataClass : BaseClass<DataClass>
public bool ABoolProperty { get; set; }


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Class.Class vs Namespace.Class for top level general use class libraries?
Category : Programming Languages

Which one is more acceptable (best-practice)?:

namespace NP
public static class IO
public static class Xml
// extension methods
using NP;
IO.GetAvailableResources ();


public static class NP
public static class IO
public static class Xml
// extension methods

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How come when I create a class derived from another GameComponent class, the game class will only update what's in the original class' update?
Category : Programming Languages

When I am creating my class ConfigsPC which is derived from another class which I created as a base class, Configs, I am not able to update anything in the Update method for the class ConfigsPC but I am able to update stuff in the Update method for the class Configs. This is my problem, I don't know what is wrong with

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If i extend a static class in PHP, and the parent class refers to “self::”, will this refer to the self in the extended class?
Category : PHP

If i extend a static class in PHP, and the parent class refers to "self::", will this refer to the self in the extended class?

So, for example

Class A
static $var
public static function guess(){self::$var = rand(); return $var}
Class B extends Class A
public static function getVar(){return s

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Can I define a class with no public constructor and place a factory method for this class objects in a different class in Scala?
Category : Programming Languages

For example (maybe a bit clumsy from a real life view, but just to illustrate):

"User" is a case class containing user name and id. Id can be never set manually, and a User class instance with no id set has no sense.

A UserBase class maintains users base and has a "getUser (name : String) : User" method returning a consistent User instance.

No one other than

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Objective-C and iPhone class initialization and accessing class objects created in init class
Category : Mobile Programming

First off good day and thanks for taking the time to answer my question.

Some background:
I have done the same thing in a regular OS X program in that I run everything in main.m

What I'm doing:

making a VERY crude app that adds a FirstName and LastName text field. The user enters some text and when they press add to address book the program gets the s

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persistent class method not generating in util class class while using custom query in liferay
Category : Coding
package emenu.advertise.database.service.persistence;
import java.util.ArrayList;
import java.util.List;
import com.liferay.portal.SystemException;
import com.liferay.portal.kernel.dao.orm.QueryPos;
import com.liferay.portal.kernel.dao.orm.QueryUtil;
import com.liferay.portal.kernel.dao.orm.SQLQuery;
import com.liferay.portal.kernel.dao.orm.Session;

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Ruby access derived class “class methods” from base class
Category : Development Tools & Services

I have a base class in Ruby that has a class method which it has inherited. I would like to call this method in the base class, but pass it an option which is specified by the derived class, like so:

class Base < SuperDuperClass
super_duper_class_method :option => my_option_value
def self.my_option_value
raise "Method my_option_value must be overridde

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@Override causes issues with class hierarchy involving interface, abstract class and concrete class
Category : Programming Languages

My classes are as follows

public interface A {
public void doSomething();
public abstract class B implements A {
public void doOneMoreThing() {
// Do one more thing
public class C extends B {
@Override <---- Causes error
public void doSomething() {
// Do something
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Rails class loading skips namespaced class when another class of same name in root namespace is loaded
Category : Programming Languages

I have two namespaces, each with its own controller and presenter classes:

Both presenters inherit from ::DocumentPresenter.

Controllers access their respective presenters without na

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