About code. Mostly on C++
I was writing recently about an MFC bug in CDatabase class in Visual Studio 2012. In the meanwhile I have stumbled upon an even greater bug (check this report on Connect for the details): when the OpenEx function fails (wrong credentials, service not reachable, machine is shot down etc.) it corrupts memory. What happen next … Read more
Problem I have recently migrated a C# 2.0 project registered for COM interop to .NET 4.5 and when I imported the type library in a C++ project with no_registry, suddenly I got some errors because the type library could not be imported. Here are the steps to reproduce: create a .NET Class Library project and … Read more
After migrating an MFC application from Visual Studio 2008 to Visual Studio 2012 I run into an unexpected error: the application was having problem fetching data from the SQL Server database. After debugging it turned out that function CDatabase::GetConnect that I was using to retrieve the connection string after opening the database (for different purposes) … Read more
A recent question on stackoverflow raised the problem of a fast algorithm to count the unique colors in an image (Faster algorithm to check the colors in a image). My answer what that this kind of problems are suited for parallelization. However, parallelization may only help when used judiciously. To demonstrate the point I have … Read more
There are some new operators available in cpplinq: singleton, generate, pairwise and zip_with. singleton This operator create a range with a single element, specified as argument. Using the operator is straight forward. auto result = singleton (42) >> to_vector (); // yields {42} generate This operator creates a range using a given predicate. auto x … Read more
Microsoft has announced that Visual Studio 2012 Update 2 will bring support in Visual Studio and TFS for git. They already used git on codeplex and this move shows how popular git has become. I don’t work much with git, but as I said codeplex uses git, and I used it for working on cpplinq. … Read more
The Problem You install a .NET redistributable package and want to reference the assemblies in your project. However, though everything is correctly installed to GAC, the assemblies don’t show up in Visual Studio’s Add Reference dialog in the .NET tab (regardless of what version of Visual Studio you have). The Cause Redistributable assemblies are intended … Read more
Here is an overview of the things that I’ve done in 2012. Codexpert Revamped The main site for the Romanian C++ community has a brand new, modern look (all built with HTML5), making things easier to find. We also now feature a blog in English, which is intended to replace the old article section. codexpert.ro … Read more
In the previous posts I introduced cpplinq, a C++ template library that provides .NET-like query operators for sequences of objects in C++11. In this third installment I will discuss the set operators the library provides. There are four set operators: distinct, union_with (called so because union is a keyword in C++), intersect_with (suffix _with is … Read more
In my previous post I introduced cpplinq, a C++ template library that provides .NET-like query operators for sequences of objects in C++11. In this second installment I will discuss about two things: range generators and range conversion operators. These two sets of operators are ubiquitous in queries. Range generators A range generator builds an object … Read more