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Generic method multiple (OR) type constraint
...constraints and generics themselves are pretty primitive compared to, say, C++ templates. C# requires you to tell the compiler in advance what operations are allowed on generic types. The way to provide that info is to add an implements interface constraint (where T : IDisposable). But you may not w...
How do function pointers in C work?
...u have brokenly implemented is Javascript-style prototype-based OO. To get C++/Pascal-style OO, you'd need to: 1. Have a const struct for a virtual table of each class with virtual members. 2. Have pointer to that struct in polymorphic objects. 3. Call virtual methods via the virtual table, and all ...
Which iomanip manipulators are 'sticky'?
...
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Multiple INSERT statements vs. single INSERT with multiple VALUES
... similar situation trying to convert a table with several 100k rows with a C++ program (MFC/ODBC).
Since this operation took a very long time, I figured bundling multiple inserts into one (up to 1000 due to MSSQL limitations). My guess that a lot of single insert statements would create an overhead...
Learning assembly [closed]
...ybe being able to write more efficient parts of code (for example, through c++), doing somethings like code caves, etc. I saw there are a zillion different flavors of assembly, so, for the purposes I mention, how should I start? What kind of assembly should I learn? I want to learn by first doing so...
What is “Argument-Dependent Lookup” (aka ADL, or “Koenig Lookup”)?
...t Lookup, describes how unqualified names are looked up by the compiler in C++.
The C++11 standard § 3.4.2/1 states:
When the postfix-expression in a function call (5.2.2) is an unqualified-id, other namespaces not considered during the usual unqualified lookup (3.4.1) may be searched, and in ...
Is file append atomic in UNIX?
...oposed Boost.AFIO which implements an asynchronous filesystem and file i/o C++ library.
Firstly, O_APPEND or the equivalent FILE_APPEND_DATA on Windows means that increments of the maximum file extent (file "length") are atomic under concurrent writers. This is guaranteed by POSIX, and Linux, FreeB...
Which is faster: while(1) or while(2)?
...ain until the program is somehow ended. This directly corresponds to the C/C++ code:
L2:
goto L2;
Edit:
Interestingly enough, even with no optimizations, the following loops all produced the exact same output (unconditional jmp) in assembly:
while(42) {}
while(1==1) {}
while(2==2) {}
while(4...
What is std::promise?
I'm fairly familiar with C++11's std::thread , std::async and std::future components (e.g. see this answer ), which are straight-forward.
...
Meaning of @classmethod and @staticmethod for beginner? [duplicate]
...string_date.split('-'))
date1 = Date(day, month, year)
For this purpose, C++ can implement such a feature with overloading, but Python lacks this overloading. Instead, we can use classmethod. Let's create another "constructor".
@classmethod
def from_string(cls, date_as_string):
da...