大约有 40,000 项符合查询结果（耗时：0.0236秒） [XML]
Fastest way to determine if an integer is between two integers (inclusive) with known sets of values
...uce two branches into one.
If you care about type safe:
if ((int32_t)(((uint32_t)x - (uint32_t)minx) | ((uint32_t)maxx - (uint32_t)x)) > = 0) ...
You can combine more variable range checking together:
if (( (x - minx) | (maxx - x) | (y - miny) | (maxy - y) ) >= 0) ...
This will reduce ...
Is there a constraint that restricts my generic method to numeric types?
...ypes = new[] {
typeof(Int16), typeof(Int32), typeof(Int64),
typeof(UInt16), typeof(UInt32), typeof(UInt64)
};
#>
using System;
public static class MaxMath {
<# foreach (var type in types) {
#>
public static <#= type.Name #> Max (<#= type.Name #> val...
How do you format an unsigned long long int using printf?
...sing the inttypes.h library that gives you types such as
int32_t, int64_t, uint64_t etc.
You can then use its macros such as:
uint64_t x;
uint32_t y;
printf("x: %"PRId64", y: %"PRId32"\n", x, y);
This is "guaranteed" to not give you the same trouble as long, unsigned long long etc, since you don...
Is gcc std::unordered_map implementation slow? If so - why?
...he code will rehash.
#define SIZE 10000000
#define DEPTH 3
std::vector<uint64_t> vec(SIZE);
boost::mt19937 rng;
boost::uniform_int<uint64_t> dist(std::numeric_limits<uint64_t>::min(),
std::numeric_limits<uint64_t>::max());
std::unordered_map...
How does one make random number between range for arc4random_uniform()?
...only has 6 sides so I imported Foundation for access to arc4random_uniform(UInt32). I attempted using the range of (1..7) to avoid randomly getting 0 however that returned an error which I didn't enjoy too much. I tried to do this:
...
How to shut down the computer from C#
..."SeShutdownPrivilege";
const short SE_PRIVILEGE_ENABLED = 2;
const uint EWX_SHUTDOWN = 1;
const short TOKEN_ADJUST_PRIVILEGES = 32;
const short TOKEN_QUERY = 8;
IntPtr hToken;
TOKEN_PRIVILEGES tkp;
// Get shutdown privileges...
OpenProcessToken(Process.GetCurrentProc...
Concept of void pointer in C programming
...t be aligned at 4-byte boundary to be dereferenced).
For example, reading uint16_t from void*:
/* may receive wrong value if ptr is not 2-byte aligned */
uint16_t value = *(uint16_t*)ptr;
/* portable way of reading a little-endian value */
uint16_t value = *(uint8_t*)ptr
| ((*((uin...
Equivalent C++ to Python generator pattern
...outine2/all.hpp>
typedef boost::coroutines2::coroutine<std::pair<uint16_t, uint16_t>> coro_t;
void pair_sequence(coro_t::push_type& yield)
{
uint16_t i = 0;
uint16_t j = 0;
for (;;) {
for (;;) {
yield(std::make_pair(i, j));
if (++j == ...
Is gcc's __attribute__((packed)) / #pragma pack unsafe?
...for pointers; if a structure is declared "packed", taking the address of a uint32_t member will yield a uint32_t packed*; trying to read from such a pointer on e.g. a Cortex-M0 will IIRC call a subroutine which will take ~7x as long as a normal read if the pointer is unaligned or ~3x as long if it's...
What does a type followed by _t (underscore-t) represent?
...rs I've forgotten. The C99 standard defines a lot of extra types, such as uintptr_t, intmax_t, int8_t, uint_least16_t, uint_fast32_t, and so on. These new types are formally defined in <stdint.h> but most often you will use <inttypes.h> which (unusually for standard C headers) includes...