code challenge - Page 590

Basic Interview Questions on Silverlight Technology

In this article, you will learn the basics of the Silverlight technology.

How to embed arbitrary content in a WPF control

Many WPF controls can display arbitrary XAML inside them. How can I do that with my own controls?

Windows Ribbon for WinForms, Part 20 – QuickAccessToolbar

In this article I'll present how to work with the ribbon quick access toolbar.

New features in YouTube Direct v2.0

We're happy to announce the release of YouTube Direc t v2 .0 . This release includes substantial upgrades that will make it easier for developers to test and...

Windows Phone 7 View Model Style Video Player

A Designer/Developer collaboration in an example of a Windows Phone 7 View Model Style Video Player

Use Thread-local Storage to Reduce Synchronization

Synchronization is often an expensive operation that can limit the performance of a multithreaded program. Using thread-local data structures instead of data structures shared by the threads can reduce synchronization in certain cases, allowing a program to run faster.

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OAG Library (OpenGL) Part 2 - Drawing Geometries 2D using the mouse in applications MFC

This tutorial shows how to objects using the mouse in an application MFC.

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Resize images stored in a sql database and store them back into it

An example how to retrieve images stored as a blob in a sql database, resize them and store them back into the database

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Asp.Net C# JQuery base Web Application for Rapid Web Presence

visinia can be used expand to create a website through module drag drop

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MVP: Updating View’s binding asynchronously with the SynchronizationContext object

MVP: Updating View’s binding asynchronously with the SynchronizationContext object.

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Windows Ribbon for WinForms, Part 21 – SizeDefinition

In this article I'll present how to define custom size definitions for ribbon group elements.

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Windows Ribbon for WinForms, Part 10 – Working With Images

In this article I'll present how to work with images in the ribbon.

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Google I/O 2012 - The Web Can Do That!?

Google I/O 2012 - The Web Can Do That!? Eric Bidelman The web is changing so quickly that it's hard to keep up with what's new in the platform. HTML5's new capabilities allow developers to build a whole new suite of applications - things that were once impossible to do, are now a reality. This session will walk you down the bleeding edge of HTML5 for 2012 by focusing on in-depth techniques, which solve real world challenges. We'll cover media capture, file I/O, advanced usage of websockets, media streaming, device input, multimedia, and modern css design. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 361 37 ratings Time: 43:07 More in Science & Technology

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"Collection Wrapper" pattern - is this common?

- by Prog

A different question of mine had to do with encapsulating member data structures inside classes. In order to understand this question better please read that question and look at the approach discussed. One of the guys who answered that question said that the approach is good, but if I understood him correctly - he said that there should be a class existing just for the purpose of wrapping the collection, instead of an ordinary class offering a number of public methods just to access the member collection. For example, instead of this: class SomeClass{ // downright exposing the concrete collection. Things[] someCollection; // other stuff omitted Thing[] getCollection(){return someCollection;} } Or this: class SomeClass{ // encapsulating the collection, but inflating the class' public interface. Thing[] someCollection; // class functionality omitted. public Thing getThing(int index){ return someCollection[index]; } public int getSize(){ return someCollection.length; } public void setThing(int index, Thing thing){ someCollection[index] = thing; } public void removeThing(int index){ someCollection[index] = null; } } We'll have this: // encapsulating the collection - in a different class, dedicated to this. class SomeClass{ CollectionWrapper someCollection; CollectionWrapper getCollection(){return someCollection;} } class CollectionWrapper{ Thing[] someCollection; public Thing getThing(int index){ return someCollection[index]; } public int getSize(){ return someCollection.length; } public void setThing(int index, Thing thing){ someCollection[index] = thing; } public void removeThing(int index){ someCollection[index] = null; } } This way, the inner data structure in SomeClass can change without affecting client code, and without forcing SomeClass to offer a lot of public methods just to access the inner collection. CollectionWrapper does this instead. E.g. if the collection changes from an array to a List, the internal implementation of CollectionWrapper changes, but client code stays the same. Also, the CollectionWrapper can hide certain things from the client code - from example, it can disallow mutation to the collection by not having the methods setThing and removeThing. This approach to decoupling client code from the concrete data structure seems IMHO pretty good. Is this approach common? What are it's downfalls? Is this used in practice?

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Upcoming Change to YouTube Video Page URLs

There's an upcoming change to YouTube video page URLs that we wanted developers to know about. While it's not something that will directly affect users of the YouTube...