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Linus Unnebäck
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answered Jul 12 '12 at 8:20
AravindhanAravindhan
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Modulo operation with negative numbers
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C99 requires that when a/b is representable:
(a/b) * b + a%b shall equal a
This makes sense, logically. Right?
Let's see what this leads to:
Example A. 5/(-3) is -1
=> (-1) * (-3) + 5%(-3) = 5
This can only happen i...
Is gcc's __attribute__((packed)) / #pragma pack unsafe?
...cked__)) my_struct {
char c;
int i;
};
struct my_struct a = {'a', 123};
struct my_struct *b = &a;
int c = a.i;
int d = b->i;
int *e __attribute__((aligned(1))) = &a.i;
int *f = &a.i;
Here, the type of a is a packed struct (as defined above). Similarly, b is a pointer to a p...
Standard alternative to GCC's ##__VA_ARGS__ trick?
There is a well-known problem with empty args for variadic macros in C99.
10 Answers
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Accessing a Shared File (UNC) From a Remote, Non-Trusted Domain With Credentials
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123
For people looking for a quick solution, you can use the NetworkShareAccesser I wrote recently...
安卓(Android) 、鸿蒙(HarmonyOS) 、苹果(iOS) 测试方式及App上架方式对比 ...
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What is the difference between compile and link function in angularjs
... message: "Address too long"
} ]
}
};
scope.state = {
address: '123 Fern Dr'
};
and you might want a directive:
<form name="theForm">
<my-field model="state" metadata="metadata" name="address">
</form>
to auto-include the proper directives and divs to show the var...
What is your favorite C programming trick? [closed]
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C99 offers some really cool stuff using anonymous arrays:
Removing pointless variables
{
int yes=1;
setsockopt(yourSocket, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int));
}
becomes
setsockopt(yourSocket, SOL_SOC...
Casting a variable using a Type variable
...andling an actual type. With proper interfaces that shouldn't be necessary 99.9% of the times. There are perhaps a few edge cases when it comes to reflection that it might make sense, but I would recommend to avoid those cases.
Edit 2:
Few extra tips:
Try to keep your code as type-safe as possib...
SQL to find the number of distinct values in a column
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Paul JamesPaul James
1,81311 gold badge99 silver badges22 bronze badges
60
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