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C++ static virtual members?
...he interface for all the object types:
class Object
{
public:
virtual char* GetClassName() = 0;
};
Now we need an actual implementation. But to avoid having to write both the static and the virtual methods, we will have our actual object classes inherit the virtual methods. This does obviousl...
Regex for numbers only
...ch more than one digit.
Note that "\d" will match [0-9] and other digit characters like the Eastern Arabic numerals ٠١٢٣٤٥٦٧٨٩. Use "^[0-9]+$" to restrict matches to just the Arabic numerals 0 - 9.
If you need to include any numeric representations other than just digits (like decim...
Practical usage of setjmp and longjmp in C
...(bufferB);
if (r == 0) longjmp(bufferA, 10003);
}
int main(int argc, char **argv)
{
routineA();
return 0;
}
Following figure shows the flow of execution:
Warning note
When using setjmp/longjmp be aware that they have an effect on the validity of local variables often not consider...
Stack smashing detected
...ple in the following snippet:
#include <stdio.h>
void func()
{
char array[10];
gets(array);
}
int main(int argc, char **argv)
{
func();
}
The compiler, (in this case gcc) adds protection variables (called canaries) which have known values. An input string of size greater than ...
Inheriting from a template class in c++
... create objects from any other class). Another such class would be Area<char>. Note that those are completely different classes, which have nothing in common except for the fact that they were generated from the same class template.
Since Area is not a class, you cannot derive the class Recta...
C/C++ with GCC: Statically add resource files to executable/library
....png data.h
Gives something like:
/*
data.h (PNM).
*/
static unsigned char
MagickImage[] =
{
0x50, 0x36, 0x0A, 0x23, 0x43, 0x72, 0x65, 0x61, 0x74, 0x65, 0x64, 0x20,
0x77, 0x69, 0x74, 0x68, 0x20, 0x47, 0x49, 0x4D, 0x50, 0x0A, 0x32, 0x37,
0x37, 0x20, 0x31, 0x36, 0x32, 0x0A, 0x32...
Extracting the last n characters from a ruby string
To get the last n characters from a string, I assumed you could use
8 Answers
8
...
Why can't C++ be parsed with a LR(1) parser?
... passed as an option to the compiler.
int a,b,c[9],*d,(*f)(), (*g)()[9], h(char); could be forbidden too, replaced by int a,b,c[9],*d;
int (*f)();
int (*g)()[9];
int h(char);
one line per function prototype or function pointer declaration.
An highly preferred alternative would be to change ...
NSLog the method name with Objective-C in iPhone
...t pointer incompatibility, but it works... So _cmd (type: SEL) really is a char* !?
– Nicolas Miari
Jun 19 '12 at 9:46
...
Validating IPv4 addresses with regexp
...
@PriteshAcharya Works fine over here.
– Kid Diamond
Mar 15 '18 at 13:27
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