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cpuid汇编指令 - C/C++ - 清泛网 - 专注C/C++及内核技术
... spaces
cmp al, 0
jz done
disp_char:
mov dl, al
mov ah, 2
int 21h
lodsb
cmp al, 0
jnz disp_char
done:
mov ax, 4c...
C++ STL Vectors: Get iterator from index?
... legal to do this folowing, according to me:
int main()
{
void foo(const char *);
sdt::vector<char> vec;
vec.push_back('h');
vec.push_back('e');
vec.push_back('l');
vec.push_back('l');
vec.push_back('o');
vec.push_back('/0');
foo(&vec[0]);
}
Of course, either foo must not copy the ad...
Boost.Asio的简单使用(Timer,Thread,Io_service类) - C/C++ - 清泛网 - 专注C/C++及内核技术
...I标准发送数据。)
using boost::asio::ip::tcp;
int main(int argc, char* argv[])
{
try
{
if (argc != 2)
{
std::cerr << "Usage: client <host>" << std::endl;
return 1;
}
用asio进行网络连接至少需要一个boost::asi...
How to get next/previous record in MySQL?
...
next:
select * from foo where id = (select min(id) from foo where id > 4)
previous:
select * from foo where id = (select max(id) from foo where id < 4)
...
How to generate unique ID with node.js
...
The fastest possible way to create random 32-char string in Node is by using native crypto module:
const crypto = require("crypto");
const id = crypto.randomBytes(16).toString("hex");
console.log(id); // => f9b327e70bbcf42494ccb28b2d98e00e
...
Get an OutputStream into a String
...tring constructor, the codepage can be a String or an instance of java.nio.charset.Charset. A possible value is java.nio.charset.StandardCharsets.UTF_8.
The method toString() accepts only a String as a codepage parameter (stand Java 8).
...
How to prevent SIGPIPEs (or handle them properly)
...? Is there a way to check if the other side of the line is still reading? (select() doesn't seem to work here as it always says the socket is writable). Or should I just catch the SIGPIPE with a handler and ignore it?
...
How do I read an entire file into a std::string in C++?
...os_type fileSize = ifs.tellg();
ifs.seekg(0, ios::beg);
vector<char> bytes(fileSize);
ifs.read(bytes.data(), fileSize);
return string(bytes.data(), fileSize);
}
This solution resulted in about 20% faster execution times than the other answers presented here, when taking the...
How to TryParse for Enum value?
... = Enum.ToObject(type, ul);
return true;
}
private static char[] _enumSeperators = new char[] { ',', ';', '+', '|', ' ' };
private static object EnumToObject(Type underlyingType, string input)
{
if (underlyingType == typeof(int))
{
int s;
...
C default arguments
...Yes. :-) But not in a way you would expect.
int f1(int arg1, double arg2, char* name, char *opt);
int f2(int arg1, double arg2, char* name)
{
return f1(arg1, arg2, name, "Some option");
}
Unfortunately, C doesn't allow you to overload methods so you'd end up with two different functions. Still...