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std::string to char*
... 1];
strcpy(cstr, str.c_str());
// do stuff
delete [] cstr;
Or in modern C++:
std::vector<char> cstr(str.c_str(), str.c_str() + str.size() + 1);
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How does `is_base_of` work?
...going to be my favorite answer ever... a question: have you read the whole C++ standard or are you just working in the C++ committee?? Congratulations!
– Marco A.
Feb 2 '14 at 17:58
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In C# what is the difference between a destructor and a Finalize method in a class?
...icle.
C# really doesn't have a "true" destructor. The syntax resembles a C++ destructor, but it really is a finalizer. You wrote it correctly in the first part of your example:
~ClassName() { }
The above is syntactic sugar for a Finalize function. It ensures that the finalizers in the base ar...
What is external linkage and internal linkage?
...also put classes. The linkage for anonymous namespaces has changed between C++98 and C++11 but the main thing is that they are unreachable from other translation units.
namespace {
int i; // external linkage but unreachable from other translation units.
class invisible_to_others { };
}
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FB OpenGraph og:image not pulling images (possibly https?)
... According to the facebook debugger, the size requirement is now 200px x 200px
– braX
Feb 3 at 7:43
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Why do most C developers use define instead of const? [duplicate]
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+1 for correct answer among a sea of wrong ones from C++ coders who don't know C.
– R.. GitHub STOP HELPING ICE
Oct 26 '10 at 13:59
3
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C default arguments
...in the header file */
#ifdef __cplusplus
/* in case the compiler is a C++ compiler */
#define DEFAULT_VALUE(value) = value
#else
/* otherwise, C compiler, do nothing */
#define DEFAULT_VALUE(value)
#endif
void window_set_size(unsigned int width DEFAULT_VALUE(640),
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Undefined reference to static constexpr char[]
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C++17 introduces inline variables
C++17 fixes this problem for constexpr static member variables requiring an out-of-line definition if it was odr-used. See the second half of this answer for pre-C++17 details.
Proposal P03...
What exactly do “IB” and “UB” mean?
...the terms "IB" and "UB" used several times, particularly in the context of C++. I've tried googling them, but apparently those two-letter combinations see a lot of use. :P
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How to clear the canvas for redrawing
...xt.clear();
// do some more drawing
context.setTransform(-1, 0, 0, 1, 200, 200);
// do some drawing with the new transform
context.clear(true);
// draw more, still using the preserved transform
};
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