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When should static_cast, dynamic_cast, const_cast and reinterpret_cast be used?
...e T(something) syntax is equivalent to (T)something and should be avoided (more on that later). A T(something, something_else) is safe, however, and guaranteed to call the constructor.
static_cast can also cast through inheritance hierarchies. It is unnecessary when casting upwards (towards a base ...
Homebrew install specific version of formula?
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TLDR: brew install postgresql@8.4.4 See answer below for more details.
*(I’ve re-edited my answer to give a more thorough workflow for installing/using older software versions with homebrew. Feel free to add a note if you found the old version better.)
Let’s start with the ...
Should services always return DTOs, or can they also return domain models?
...g duplication of code, but as your project expands then it would make much more sense, specially in a team environment where different teams are assigned to different layers.
DTO might add additional complexity to your application, but so are your layers. DTO is an expensive feature of your system,...
What does Ruby have that Python doesn't, and vice versa?
...ould like to see an example of how Ruby blocks help you to write something more concisely or more beautiful than with Python because it has not blocks. Your example could be written: for i in [1, 2, 3, 4]: print(i + 5). It doesn't use blocks, but its concise and beautiful as well as the ruby each ex...
The new keyword “auto”; When should it be used to declare a variable type? [duplicate]
...n(); it != v.end(); ++it) //v is some [std] container
{
//..
}
Or, more generally,
//good : auto increases readability here
for(auto it = std::begin(v); it != std::end(v); ++it)//v could be array as well
{
//..
}
But when the type is not very well-known and infrequently used , the...
Java “Virtual Machine” vs. Python “Interpreter” parlance?
...s analogous to an instruction set of a specific CPU and tends to work at a more fundamental level with very basic building blocks of such instructions (or byte codes) that are independent of the next. An instruction executes deterministically based only on the current state of the virtual machine an...
Accessing inactive union member and undefined behavior?
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C++ lambda with captures as a function pointer
... <functional>
using namespace std;
// Original ftw function taking raw function pointer that cannot be modified
int ftw(const char *fpath, int(*callback)(const char *path)) {
return callback(fpath);
}
static std::function<int(const char*path)> ftw_callback_function;
static int ftw_...
How to “warm-up” Entity Framework? When does it get “cold”?
...ge goes through to the database, so it's not so easy to deal with. Code is more flexible.
Do not use a lot of TPT inheritance (that's a general performance issue in EF). Neither build your inheritance hierarchies too deep nor too wide. Only 2-3 properties specific to some class may not be enough to...
live output from subprocess command
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