InfoQ Homepage Development Content on InfoQ
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Closures and Object Lifetime in C# and Visual Basic
C# 2 and the yet to be released VB 9 allow developers to reference local variables in anonymous functions. When an anonymous function 'closes over' a variable, the local variable is promoted to an instance variable and stored in an object called a closure. This allows the variable to exist long after the method call that created it has been completed, but can cause some unexpected side effects.
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Open Source Business Models Debate: Create & Support vs. Pure-Support
Two different approaches and viewpoints about professional open source collided in a recent blogspace discussion where Rod Johnson (creator of the Spring Framework & CEO of Interface21 which offers Spring support services) and Stormy Peters from OpenLogic had a heated debate.
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Presentation: Obie Fernandez on Agile DSL Development in Ruby
Our own InfoQ Ruby editor gives you a primer on using Ruby to develop DSLs with our exclusive presentation from the JAOO conference in Denmark.
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The Three Religions of Rich Internet Applications
From Ajax to Silverlight, from Adobe Integrated Runtime to Flex and Flash, from JavaFX to OpenLaszlo, Rich Internet Aplications seem to be on the tip of everyone's tongue these days. What people mean when they talk about Rich Internet Applications differs. Simon Morris cuts through all that to identify a taxonomy of Rich Internet Applications, the "three distinct religions in the RIA space."
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VB Tips and Trips: Multiple Dispatch
With the plans for more dynamic programming in VBx, this is a good time to point out some of the dynamic features already available in Visual Basic. In this installment we talk about multiple dispatch.
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Microsoft Creates "Open Source Community Lead" Position
Microsoft has tapped Garrett Serack as their new Open Source Community Lead. In an attempt to move the company towards open source, Microsoft has charged him with "building and connecting Open Source Communities around Microsoft Platforms".
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Separating Views from Business Logic with Acropolis
Microsoft's GUI toolkits tend to encourage developers to tightly couple business logic with presentation. Comparing the original VB and ASP or WinForms and ASP.Net, one sees very little change in this regard. Acropolis is different though, and for the first time since MFC it looks like Microsoft is taking the concept of separation of concerns seriously.
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Reliable Messaging in Ruby with AP4R
Shun'ichi Shinohara and Kiwamu Kato have been working on bringing reliable messging to Ruby with their own API & protocol project, based on previous experiences designing a Java-based high volume messaging framework. AP4R, Asynchronous Processing for Ruby, is an implementation of reliable asynchronous message processing, providing message queuing and message dispatching.
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Hibernate Search: Indexed Full Text Search of your Domain Model
The second beta of the new Hibernate Search project was recently released. InfoQ spoke to project lead Emmanuel Bernard to find out more. The Hibernate Search project is aimed at users of Hibernate or JPA that want to make their Hibernate/JPA-managed objects accessible via indexed, full-text search.
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.NET Micro Now Supported on Blackfin
The smallest .NET edition, Micro, is now supported on Analog Devices' Blackfin platform. This makes it the first processor supported by .NET built specifically for digital signal processing.
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The Buzz on Acropolis
On June 5, David Hill of Microsoft announced the coming of a new client application development framework code-named Acropolis. The intent is to ship in one year's time a set of components and tools to ease the development of complex many-screened modular client applications on the .NET Framework. How did the community react?
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New Best Practices for Working with Date/Time Values
A common problem with programming languages, including those of .NET, is the lack of decent time zone support. Too often developers pretend that time zones do not exist at all rather than take the time and effort to get them right. Microsoft seeks to change this for .NET programmers by introducing the TimeZoneInfo and DateTimeOffset classes.
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Article: Service Firewall Pattern
InfoQ publishes a sample pattern from Arnon Rotem-Gal-Oz' in-progress book SOA Patterns. Arnon explains how to use a Service Firewall to intercept messages to provide better security.
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What's a Ruby DSL and what isn't?
"Domain Specific Language" (DSL) is a popular buzzword in the Ruby community. Recently, however, doubts about the use of the term arose, particularly because it tends to be used even for ordinary APIs, simply because Ruby allows to omit parentheses. We look at some of the style debates.
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Presentation: Building Real World Apps with ASP.NET AJAX
Wally McClure gave a great presentation at the latest devLink conference on ASP.NET AJAX. ASP.NET AJAX is a development technology from Microsoft which integrates cross-browser client script libraries with the ASP.NET 2.0 development framework.