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Why does this loop produce “warning: iteration 3u invokes undefined behavior” and output more than 4
... anything can happen, and discussing why does it happen under the rules of C++ doesn't make sense.
C++11 draft N3337: §5.4:1
If during the evaluation of an expression, the result is not mathematically defined or not in the range of
representable values for its type, the behavior is undefin...
How can I pass a member function where a free function is expected?
... an object from the void* and then calls the member function.
In a proper C++ interface you might want to have a look at having your function take templated argument for function objects to use arbitrary class types. If using a templated interface is undesirable you should use something like std::f...
Why are Python's 'private' methods not actually private?
...on, most OOP languages don't support truly private members. For example in C++ you have raw access to memory and in C# trusted code can use private reflection.
– CodesInChaos
Jul 13 '16 at 10:40
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What are the most common naming conventions in C?
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Well firstly C doesn't have public/private/virtual functions. That's C++ and it has different conventions. In C typically you have:
Constants in ALL_CAPS
Underscores to delimit words in structs or function names, hardly ever do you see camel case in C;
structs, typedefs, unions, members (of ...
Most efficient way to remove special characters from string
...ogram() {
_lookup = new bool[65536];
for (char c = '0'; c <= '9'; c++) _lookup[c] = true;
for (char c = 'A'; c <= 'Z'; c++) _lookup[c] = true;
for (char c = 'a'; c <= 'z'; c++) _lookup[c] = true;
_lookup['.'] = true;
_lookup['_'] = true;
}
public static string RemoveSpeci...
What is string_view?
string_view was a proposed feature within the C++ Library Fundamentals TS( N3921 ) added to C++17
1 Answer
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What is The Rule of Three?
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Introduction
C++ treats variables of user-defined types with value semantics.
This means that objects are implicitly copied in various contexts,
and we should understand what "copying an object" actually means.
Let us consider a simple ex...
STL or Qt containers?
...mplementation across operating systems. A STL implementation must obey the C++ standard, but
is otherwise free to do as it pleases (see the std::string COW controversy). Some STL implementations are especially
bad.
provide hashes, which are not available unless you use TR1
The QTL has a different ...
What's the rationale for null terminated strings?
As much as I love C and C++, I can't help but scratch my head at the choice of null terminated strings:
18 Answers
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Implements vs extends: When to use? What's the difference?
... the class that "implements" the interface can implement the methods. The C++ equivalent of an interface would be an abstract class (not EXACTLY the same but pretty much).
Also java doesn't support multiple inheritance for classes. This is solved by using multiple interfaces.
public interface Exam...