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Since 1998, DevX has helped people start businesses, build websites, and provide enterprise technology to people globally. Interviewing the likes of Microsoft’s co-founder, Steve Ballmer, the publication brings comprehensive, reliable, and accessible insights to the Internet.
he most widespread?and likely most reported on?Semantic Web technology is a W3C recommendation called RDF (Resource Description Framework). An XML-based language for representing data in knowledge bases, RDF is used
ormally, you initialize data members in a constructor’s member initialization list. When a class has multiple constructors, each constructor initializes the object’s members individually, which often leads to repeating the
earching for specific content or a specific column is a common task for a SQL Server administrator or developer. If you’re familiar with the database or it’s documented, searches aren’t
There tip corrects a problem with the previously published tip Email Address Validation Using a Regular Expression. The problem with the original version is that when you enter an email
o create scalable enterprise web applications, you need to consider both client- and server-side components. A solid code base, judicial cache implementations, and content acceleration via compression helps to create
These handy functions let you easily convert from a generic string List to a delimited string, or from a delimited string to a string List: /// /// Converts List to
PropertyPaths are a very useful binding concept, and can be useful in other instances as well. However, .NET 3.5 does not support evaluating PropertyPaths against objects directly without using binding.
If you’re with an organization that requires you to document everything that you do (and if you’re not required to, there’s something wrong!), you’ll no doubt have to document any
You may find that you need to encrypt some sections of configuration files (such as Web.config) to protect sensitive information. Yet you may also need to decrypt that information to
Sometimes, you may need to perform conditional logic based on whether a field does or does not exist in a recordset. To check for the existence of a field, simply
n my 15 years as a software professional I’ve never seen a software stack as unproductive?not to mention as verbose or complicated?as J2EE, despite its enterprise-grade features. Every single J2EE
The next time you come across a situation where two Integers defined with equal values fail an equivalency (==) test, remember this tip. Suppose you have two integers defined as
he visual appearance of controls in XAML?their styling?is, unlike Windows Forms controls, completely customizable. XAML offers speedy and uncomplicated ways to style controls, primarily: Declaratively, through XAML markup Programmatically, through
isual Basic Express (VB Express) wizards make it easy to connect to a remote data source and start manipulating data. However, the results aren’t always flexible enough for a development
ike Delphi’s other development platforms, Delphi for .NET offers a wide range of data access options for ASP.NET developers. These include support for the generic foundation class library (FCL) data
TML 5 is an interesting beastie. The specification was not planned; The W3C was committed to HTML 4.1 as the last word in HTML. As such, most of the requests
It’s best not to return null from a method that returns an array type. Always returning an array, even if the array has zero length, greatly improves the generality of
This query returns a list of all the user-defined functions in a SQL Server database. In a T-SQL Window, write this query, substituting the appropriate database name for the db_name
The String.Split method has few limitations. For example, it does not support splits on duplicate delimiters such as double pipe (||) characters, double tildes (~~), or double colons (::). The
You can select which column to sort a SELECT statement by at runtime, using just one parameter. To do this, declare one parameter and use it with a CASE command.
Type conversions are more error-prone than most code, so it’s useful to have ways to convert types in ways you know will work. The CanConvert method in this tip checks
avaFX is a scripting language that provides built-in properties for manipulating objects within a 2D coordinate system. A competing technology to Microsoft’s Silverlight, JavaFX provides the tools to fill and
ver the past several years, web applications have evolved from collections of simple HTML pages into highly scalable and interactive rich applications built using a variety of technologies. Designing and
ser stories are probably the most popular tool for gathering user requirements on an Agile project. A user story represents some goal that a user would like to achieve, and
First, launch Eclipse with increased memory options, which you can do as follows (increase these values as needed, but don’t exceed your available memory): eclipse.exe -vmargs -Xmx512M -XX:MaxPermSize=256M Sometimes, the
You can find out which session is causing blocking problems using this SQL command: SELECT blocking_session, sid, serial#, wait_class, seconds_in_wait FROM v$session WHERE blocking_session IS NOT NULLORDER BY blocking_session;
Using the following code snippet you can run any application (such as Word, Excel, etc.) or open any file whose extension is associated with an application, such as .doc, .txt,
The simple way to convert Hashtable keys or values into an ArrayList is to use a constructor that takes a list of values. The Hashtable.Keys and Hashtable.Values properties both return
It can be annoying to open the IDE every time you need to build a .NET solution or project. Fortunately, .NET ships with a command-line utility called devenv.exe that you
Follow these steps: Open the Registry editor. Find the key HKEY_CLASSES_ROOTAllFilesystemObjectsshellexContextMenuHandlers. Right-click on that item and select New ? Key from the context menu to create a new key. Name
