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C/C++获取Windows的CPU、内存、硬盘使用率 - C/C++ - 清泛网 - 专注C/C++及内核技术
...icalDriveStrings()函数获取所有驱动器字符串信息长度。
char* DStr = new char[DSLength];//用获取的长度在堆区创建一个c风格的字符串数组
GetLogicalDriveStrings(DSLength, (LPTSTR)DStr);
//通过GetLogicalDriveStrings将字符串信息复制到堆区数...
Socket send函数和recv函数详解以及利用select()函数来进行指定时间的阻塞 ...
Socket send函数和recv函数详解以及利用select()函数来进行指定时间的阻塞int send( SOCKET s, const char FAR *buf, int len, int flags ); 不论是客户还是服务器应用程序都用send函数来向TCP连接的...int send( SOCKET s, const char FAR *buf, int len, int flags );
...
C++ convert hex string to signed integer
...iostream>
using namespace std;
int main() {
string s = "abcd";
char * p;
long n = strtol( s.c_str(), & p, 16 );
if ( * p != 0 ) { //my bad edit was here
cout << "not a number" << endl;
}
else {
cout << n << endl;
}
}
...
Is there any pythonic way to combine two dicts (adding values for keys that appear in both)?
...':4, 'd':5}
>>> c = {x: A.get(x, 0) + B.get(x, 0) for x in set(A).union(B)}
>>> print(c)
{'a': 1, 'c': 7, 'b': 5, 'd': 5}
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fo...
Build a Basic Python Iterator
...n (defines __getitem__)
Examples:
# generator
def uc_gen(text):
for char in text.upper():
yield char
# generator expression
def uc_genexp(text):
return (char for char in text.upper())
# iterator protocol
class uc_iter():
def __init__(self, text):
self.text = text.upp...
Why is argc not a constant?
...at any C function can do. Also, getopt is declared as int getopt(int argc, char * const argv[], const char *optstring);. And here the const is not top level, but declares the pointers to be const, a promise to not modify them (although the strings that they point to might conceivably be modified).
...
How do I compare two hashes?
...> B.size doesn't necessarily mean A includes B. Still need to take the union of symmetric differences.
– Gene
Mar 5 '15 at 3:20
...
How to insert element into arrays at specific position?
...
array_slice() can be used to extract parts of the array, and the union array operator (+) can recombine the parts.
$res = array_slice($array, 0, 3, true) +
array("my_key" => "my_value") +
array_slice($array, 3, count($array)-3, true);
This example:
$array = array(
'zero' ...
Replace all non Alpha Numeric characters, New Lines, and multiple White Space with one Space
.../[\W_]+/g," ");
\W is the negation of shorthand \w for [A-Za-z0-9_] word characters (including the underscore)
Example at regex101.com
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Will strlen be calculated multiple times if used in a loop condition?
...g the string, a for loop is probably not the best way to iterate over each character. I'd think a while loop is more direct and easier to manage the index counter.
– mlibby
Jul 6 '12 at 15:40
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