大约有 44,000 项符合查询结果（耗时：0.0431秒） [XML]
Is there a way to check if a file is in use?
...is closed after I'm done. I think you'll find that the using() {} is less characters than try {} finally { obj.Dispose() }. You'll also find that you now need to declare your object reference outside the using statement, which is more typing. If you have a explicit interface you'd also have to cas...
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...
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 ...
Why is it slower to iterate over a small string than a small list?
...string took longer than doing the same operation on a list of small single character strings. Any explanation? It's almost 1.35 times as much time.
...
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...
How can I wrap text to some length in Vim?
...
Once you set 'textwidth', you can select text with visual mode and press gq to wrap it nicely (you can also use Q on some older/legacy configurations).
A few useful tips:
gqq (wrap the current line)
gq} (wrap this 'paragraph', i.e. until the next blank line...
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 ...
Validating IPv4 addresses with regexp
...
@PriteshAcharya Works fine over here.
– Kid Diamond
Mar 15 '18 at 13:27
|
...
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
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