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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...
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...
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?
...
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 ...
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...
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
...
Order of member constructor and destructor calls
Oh C++ gurus, I seek thy wisdom. Speak standardese to me and tell my if C++ guarantees that the following program:
4 Answer...
Windows 7, 64 bit, DLL problems
I have a problem with our executable. I'm running this C++ 32-bit executable on my Windows 7 64-bit development box that also has all those Microsoft applications (Visual Studio 2008 + 2010, TFS, SDK, Microsoft Office)...
And it's still running just fine.
...
How to do parallel programming in Python?
For C++, we can use OpenMP to do parallel programming; however, OpenMP will not work for Python. What should I do if I want to parallel some parts of my python program?
...