About code. Mostly on C++
Channel9 recently posted a video with the Parallel Computing Concurrency Runtime team talking, mainly, about tasks and continuations, new features to the Parallel Patterns Library. These are already available through the ConcRT Extra’s Sample Pack. You can watch the half hour interview with the team here. Besides the new stuff they shown, I particularly liked … Read more
I’ve ran recently across this question: how to find (using C++) if a computer is a laptop? That is possible with WMI and many answers (such as this) point to the Win32_SystemEnclosure class. This class has a member called ChassisTypes, which is an array of integers indicating possible chassis types. At least one of them … Read more
It is possible to register both 32-bit and 64-bit versions of the same COM server on 64-bit machine. This leads to several questions such as how are they registered and which one of the two is used. I will try to answer them below. But first, let’s start with an example. Example Let’s say we … Read more
Two days ago I posted a simple implementation of a game of colors. Though it was intended only as an exercise, someone has criticizes the use of an int** to hold the grid information, mainly for two reasons: the footprint on 64-bit platforms can get nasty the explicitly allocated memory, instead of using a std::vector … Read more
Some of the important changs in Visual Studio 2010 in regard to VC++ are represented by the support in the C++ compiler of some of the features already approved for the new C++ standard, so far called C++0x. In this post I will give a short overview on then. static_assert I already wrote a post … Read more
I recently found a piece of code that can be summarized by the following sample: interface I { void F1(); void F2(); } class X { public void F2() { Console.WriteLine(“F2”); } } class A : X, I { public void F1() { Console.WriteLine(“F1”); } } As you can see there is an interface I … Read more
.NET provides two classes for image transformations: Matrix, used for geometric transformations, and ColorMatrix, used for color transformations. One of such color transformations is inverting or negating. This means subtracting each color component from 255. Black (0,0,0) becomes White (255, 255, 255), and Green (0, 255, 0) becomes Magenta (255, 0, 255). You can find … Read more
.NET 3.0 provides some support for working with ZIP files. However, it has an important drawback: it only works for packages that are conformant to the Open Packaging Convention standard. Most of the ZIP files are not. Codeplex features a library called DotNetZip that provides support for packing and unpacking in C#, VB.NET or any … Read more
Sometimes you want to customize a file dialog, maybe to provide a preview for images or files in general. Fortunately, the common file dialog can be easily extended to achieve this. I will explain in this post how to do that. There are several things one needs to do to extend the file dialog. First … Read more
Concepts were supposed to be an important new feature in C++0x. They were meant to allow programmers to specify properties (like constraints) for templates, allow compilers to do some optimization and tools to do some formal checking on the code. After years of debate, the standard committee found them “untried, risky and controversial” and ruled … Read more