大约有 30,000 项符合查询结果（耗时：0.0197秒） [XML]
Specifically, what's dangerous about casting the result of malloc?
...s both C and C++: #ifdef __cplusplus \nextern "C" { \n#endif static inline uint16_t swb(uint16_t a) {return ((a << 8) | ((a >> 8) & 0xFF); } \n#ifdef __cplusplus\n } \n#endif. Now, why you'd want to call malloc in a static inline function I really don't know, but headers which work i...
How to identify numpy types in python?
...ars.html#arrays-scalars-built-in
>>> x = np.array([1,], dtype=np.uint64)
>>> x[0].dtype
dtype('uint64')
>>> isinstance(x[0], np.uint64)
True
>>> isinstance(x[0], np.integer)
True # generic integer
>>> isinstance(x[0], int)
False # but not a python int ...
Opening a folder in explorer and selecting a file
...e)]
public static extern int SHOpenFolderAndSelectItems(IntPtr pidlFolder, uint cidl, [In, MarshalAs(UnmanagedType.LPArray)] IntPtr[] apidl, uint dwFlags);
[DllImport("shell32.dll", SetLastError = true)]
public static extern void SHParseDisplayName([MarshalAs(UnmanagedType.LPWStr)] string name, Int...
Check substring exists in a string in C
...
My own humble (case sensitive) solution:
uint8_t strContains(char* string, char* toFind)
{
uint8_t slen = strlen(string);
uint8_t tFlen = strlen(toFind);
uint8_t found = 0;
if( slen >= tFlen )
{
for(uint8_t s=0, t=0; s<slen; s++)
...
What do 'real', 'user' and 'sys' mean in the output of time(1)?
...clude <stdio.h>
#include <stdlib.h>
#include <unistd.h>
uint64_t niters;
void* my_thread(void *arg) {
uint64_t *argument, i, result;
argument = (uint64_t *)arg;
result = *argument;
for (i = 0; i < niters; ++i) {
result = (result * result) - (3 * result)...
C/C++ with GCC: Statically add resource files to executable/library
...erface looks something like
/** created from binary via objcopy */
extern uint8_t foo_data[] asm("_binary_foo_data_bin_start");
extern uint8_t foo_data_size[] asm("_binary_foo_data_bin_size");
extern uint8_t foo_data_end[] asm("_binary_foo_data_bin_end");
so you can do stuff like
for (uint...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...ate is:
This shows the result of benchmark runs on the following code:
uint64_t do_Ndec(int thread, int loop_count)
{
uint64_t start;
uint64_t end;
int __d0;
asm volatile ("rdtsc\n\tshl $32, %%rdx\n\tor %%rdx, %0" : "=a" (start) : : "%rdx");
mutex.lock();
mutex.unlock();
asm volat...
What is a rune?
..._compare.go
Output:
hello你好, type: string, len: 11
s[0]: 104, type: uint8
s[10]: 189, type: uint8
[104 101 108 108 111 20320 22909], type: []int32, len: 7
Explanation:
The string hello你好 has length 11, because first 5 chars each take 1 byte only, while the last 2 Chinese chars each t...
How to quickly check if folder is empty (.NET)?
...tial, CharSet = CharSet.Auto)]
private struct WIN32_FIND_DATA
{
public uint dwFileAttributes;
public System.Runtime.InteropServices.ComTypes.FILETIME ftCreationTime;
public System.Runtime.InteropServices.ComTypes.FILETIME ftLastAccessTime;
public System.Runtime.InteropServices.ComTyp...
Best way to test if a generic type is a string? (C#)
...of that class. IConvertible is implemented by Boolean, SByte, Byte, Int16, UInt16, Int32, UInt32, Int64, UInt64, Single, Double, Decimal, DateTime, Char, and String, so you can check for primitive types using this. More info on "Generic Type Checking".
...