大约有 40,000 项符合查询结果（耗时：0.0455秒） [XML]
Why can I pass 1 as a short, but not the int variable i?
... (§7.18) of type int can be converted to type sbyte, byte, short, ushort, uint, or ulong, provided the value of the constant-expression is within the range of the destination type.
A constant-expression of type long can be converted to type ulong, provided the value of the constant-expression is no...
Difference between objectForKey and valueForKey?
...@(10), @"Y":@(20)} valueForKey:@"Z"]); // prints "Value for Z:(null)"
uint32_t testItemsCount = 1000000;
// create huge dictionary of numbers
NSMutableDictionary *d = [NSMutableDictionary dictionaryWithCapacity:testItemsCount];
for (long i=0; i<testItemsCount; ++i) {
// m...
Practical use of `stackalloc` keyword
...ublic static unsafe extern HResult CfGetPlaceholderInfo(IntPtr fileHandle, uint infoClass, void* infoBuffer, uint infoBufferLength, out uint returnedLength);
You can make use of stackalloc.
byte* buffer = stackalloc byte[1024];
CfGetPlaceholderInfo(fileHandle, 0, buffer, 1024, out var returnedLen...
Java equivalent of unsigned long long?
...access to a 64 bit unsigned integer, via unsigned long long int , or via uint64_t . Now, in Java longs are 64 bits, I know. However, they are signed.
...
Map Tiling Algorithm
...ottom Right: ' + southeastTile);
}
}
function pushTile(til:Object, tx:uint, ty:uint, degrees:uint):void
{
til.x = tx * tileDimension;
til.y = ty * tileDimension;
if (degrees != 0) tileRotate(til, degrees);
}
function tileRotate(tile:Object, degrees:uint):void
{
// http://www.fl...
Convert List into Comma-Separated String
...
Enjoy!
Console.WriteLine(String.Join(",", new List<uint> { 1, 2, 3, 4, 5 }));
First Parameter: ","
Second Parameter: new List<uint> { 1, 2, 3, 4, 5 })
String.Join will take a list as a the second parameter and join all of the elements using the string passed as th...
How to find the Number of CPU Cores via .NET/C#?
...EVINFO_DATA
{
public int cbSize;
public Guid ClassGuid;
public uint DevInst;
public IntPtr Reserved;
}
private enum DIGCF
{
DEFAULT = 0x1,
PRESENT = 0x2,
ALLCLASSES = 0x4,
PROFILE = 0x8,
DEVICEINTERFACE = 0x10,
}
...
C# binary literals
...Integer literals Integer literals are used to write values of
types int, uint, long, and ulong.
Integer literals have two possible
forms: decimal and hexadecimal.
To parse, you can use:
int i = Convert.ToInt32("01101101", 2);
...
ATL正则表达式库使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...cUrl))
{
// Unexpected error.
return 0;
}
for (UINT nGroupIndex = 0; nGroupIndex < mcUrl.m_uNumGroups;
++nGroupIndex)
{
const CAtlREMatchContext<>::RECHAR* szStart = 0;
const CAtlREMatchContext<>::RECHAR* szEnd = 0;
mcUrl.GetMatch(nGroupI...
Generating Random Passwords
...(int i = 0; i < length; i++)
{
ulong value = BitConverter.ToUInt64(bytes, i * 8);
result[i] = characterArray[value % (uint)characterArray.Length];
}
return new string(result);
}
(This is a copy of my answer to How can I generate random 8 character, alphanumeric strin...