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Piotr Zalewa has created a really great playground, jsFiddle, for testing sample code and playing with the Web. With an area for the holy trinity of the Web (HTML, CSS, JS) and an output region, you can get right to hacking. It goes beyond this though. You can also add resources, an Ajax echo backend, and auto load from a slew of JavaScript frameworks. You can also check out the examples and see great stuff such as Processing in action. And the finishing touch, share and embed. Piotr wrote all of this using CodeMirror and MooTools. Nice! Having worked on Bespin, and developed a playground like this (looking forward to show a new mobile one soon!) I appreciate the work!

When C# 4.0 was released we C# developers were given a new toy. to play with, and that's Parallel Programming. This is done with the System.Threading.Tasks.Parallel Namespace. This allows for parallel loops & regions (to be discussed at a later date). What is parallel programming you ask, well in todays age most, if not all, household computers have multi-core processors, and parallel programming allows us to take davantage of this new found power, well not actually new as multi-core processors have been around a while now, but software has not kept up with the changes in hardware.

As PHP is not a strictly OOP language, it is very easy to slip into sloppier and more procedural code as well as program in PHP one's entire career and not deal with OOP at all. In this tutorial, I will cover the following: Why use OOP over procedural programming, as I have been doing?Encapsulation and modularityBasic class design

I happened to write this code sometime back that took Excel data and converted it to specific xml format. It was a simple Linq statement and here is the code

The R programming language was featured about a year ago in a New York Times article (http://bit.ly/iaqQ). I've been an R user since 2000, so I've collected some resources for people who want to get started with R.   The first place to start is the R Project web site at http://www.r-project.org/. Next, you'll actually want to install R itself. There are several options, depending on your environment.

As many long time readers know, I am an enthusiast of the F# programming language.  I make no apologies for the fact that, if you are developing software on the .NET platform, F# is one of the better choices you can make for numerous reasons.  It is one of the reasons I proudly contributed as a co-author to the book, Professional F# 2.0, which is being published by Wrox in October. Some of the oft cited benefits of F# are that, to distill them quickly, it is good at doing intensely mathematical operations, it is built for parallelism, and it is good at helping define domain specific languages.  Those benefits are so often cited by speakers on the F# speaker circuit that they pretty much seem cliche to me at this point (note, yours truly is proud to call himself a member of said circuit, and often gives this talk!)  As great as these features are, there are a couple features, that in my more mundane F# experiences, seem to stand out as things that “save my ass”, for lack of a better phrase, more often than not.

scala> val ONE_DAY = 24 * 60 * 60 * 1000 ONE_DAY: Int = 86400000 scala> var manyDays: Long = ONE_DAY * 10000 manyDays: Long = 711573504 scala> var manyDays: Long = ONE_DAY * 10000L manyDays: Long = 864000000000 scala> ONE_DAY * 10000 res1: Int = 711573504

F# is Microsoft's first functional programming language to be included as one of Visual Studio's official set of languages. F# is a succinct, efficient, expressive functional/object-oriented programming language under joint development by Microsoft Developer Division and Microsoft Research. During the course of Erik Meijer's fantastic lecture series on functional programming fundamentals several of you asked for examples of specific topics in F#. Well, we listened. Dr. Don Syme is a principal researcher in MSR Cambridge. He has a rich history in programming language research, design, and implementation (C# generics being one of his most recognized implementations), and is the principle creator of F#. Who better to lecture on the topic than Don? This three part series will serve as an introduction to F#, including insights into the rationale behind the history and creation of Microsoft's newest language.

Jeffrey Richter has completed CLR via C#, Third Edition and the book is at the printer! We’ll post chapter excerpts when the book is available in a couple of weeks. Here is Jeffrey describing the book in his Introduction: