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Why does sizeof(x++) not increment x?
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From the C99 Standard (the emphasis is mine)
6.5.3.4/2
The sizeof operator yields the size (in bytes) of its operand, which may be an expression or the parenthesized name of a type. The size is determined from the type of the ...
C char array initialization
...e for main() (and you should also use void, i.e., int main(void) { ... }. C99 got rid of this rule, so this code will not compile for C99 and later. The other thing to note here is that starting with C99, if you omit return in main, there is an automatic return 0; placed/implied before the } at main...
What is the behavior of integer division?
...@Philip Potter: I don't think it was defined in C89, and it isn't in the 1998 C++ standard. In those, of course (a / b) * b + a % b == a had to be satisfied, and the absolute value of a % b had to be less than a, but whether a % b was negative for negative a or b was not specified.
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Creating and Update Laravel Eloquent
...re is:
// If there's a flight from Oakland to San Diego, set the price to $99.
// If no matching model exists, create one.
$flight = App\Flight::updateOrCreate(
['departure' => 'Oakland', 'destination' => 'San Diego'],
['price' => 99]
);
which pretty much clears everything.
Query B...
How to assign string to bytes array
...ray: %v (%T)\n", arr, arr)
...gives the following output:
array: [97 98 99 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] ([20]uint8)
I also made it available at the Go Playground
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Remove plot axis values
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199
Remove numbering on x-axis or y-axis:
plot(1:10, xaxt='n')
plot(1:10, yaxt='n')
If you want ...
How to get RGB values from UIColor?
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codelogiccodelogic
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Convert objective-c typedef to its string equivalent
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eldarerathis
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answered Jul 7 '09 at 21:41
Barry WarkBarry Wark
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bpftrace教程【官方】 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...ftrace。
9. 分析内核实时函数栈
# bpftrace -e 'profile:hz:99 { @[kstack] = count(); }'
Attaching 1 probe...
^C
[...]
@[
filemap_map_pages+181
__handle_mm_fault+2905
handle_mm_fault+250
__do_page_fault+599
async_page_fault+69
]: 12
[...]
@[
cpuidle_enter_state+164
do_...
How to work with complex numbers in C?
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@Calmarius complex is a standard c99 type (under the hood on GCC, it is actually an alias to the _Complex type).
– Snaipe
Apr 12 '15 at 8:50
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