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How to determine the longest increasing subsequence using dynamic programming?
...
The following C++ implementation includes also some code that builds the actual longest increasing subsequence using an array called prev.
std::vector<int> longest_increasing_subsequence (const std::vector<int>& s)
{
i...
In C#, What is a monad?
...te by Oliver Steele, trying to relate Monads to operator overloading à la C++ or C#: Monads allow you to overload the ';' operator.
– Jörg W Mittag
Mar 23 '09 at 22:12
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Seeking clarification on apparent contradictions regarding weakly typed languages
...o realise that languages such as Java and C# (and to a certain extent also C++) have a type system that is ensured twice: once at compile time, and once at runtime. void* breaks through both type checks. Generic type erasure doesn’t, it only circumvents the compile-time checks. It’s exactly like...
Map vs Object in JavaScript
... better choice.
This is because javascript engines compile objects down to C++ classes in the background. These classes are cached, so when you make a new object with the same exact properties the engine will reuse an existing background class. The access path for properties on these classes is very...
What are some (concrete) use-cases for metaclasses?
...ers and passing it as the first argument to its functions. A person seeing C++ for the first time might say, "what is this magic? Why is the compiler implicitly passing this to methods, but not to regular and static functions? It's better to be explicit and verbose about your arguments". But then, o...
Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...ing when I do micro-optimizations (unrelated to stack
alignment) on C or C++ source codes?
Simply by telling gcc to do the right alignment:
g++ -O2 -falign-functions=16 -falign-loops=16
Long answer:
The code will run slower if:
an XX byte boundary cuts add() in the middle (XX being machin...
Getting started with Haskell
...capable of anything, with enough skill. It is very fast (behind only C and C++ in my experience), and can be used for anything from simulations to servers, guis and web applications.
However there are some problems that are easier to write for a beginner in Haskell than others. Mathematical problems...
How to avoid reverse engineering of an APK file?
...e option of including shared libraries, you can include the needed code in C++ to verify file sizes, integration,
etc. If you need to add an external native library to your APK's library folder on every build,
then you can use it by the below suggestion.
Put the library in the native library path w...
boost::flat_map and its performance compared to map and unordered_map
...e Loki AssocVector, but with some supplementary modernizations coming with C++11, exploiting move semantics to accelerate insert and delete of single elements.
This is still an ordered container. Most people usually don't need the ordering part, therefore the existence of unordered...
Have you con...
When is the thread pool used?
...ot the whole picture.
Certain functions and modules, usually written in C/C++, support asynchronous I/O. When you call these functions and methods, they internally manage passing the call on to a worker thread. For instance, when you use the fs module to request a file, the fs module passes that ...