大约有 45,000 项符合查询结果（耗时：0.0299秒） [XML]
How do you calculate log base 2 in Java for integers?
...e function that I use for this calculation:
public static int binlog( int bits ) // returns 0 for bits=0
{
int log = 0;
if( ( bits & 0xffff0000 ) != 0 ) { bits >>>= 16; log = 16; }
if( bits >= 256 ) { bits >>>= 8; log += 8; }
if( bits >= 16 ) { bits >...
What is the best way to find the users home directory in Java?
The difficulty is that it should be cross platform. Windows 2000, XP, Vista, OSX, Linux, other unix variants. I am looking for a snippet of code that can accomplish this for all platforms, and a way to detect the platform.
...
What data type to use for hashed password field and what length?
...) function to reduce a string of hex digits by half.
MD5 generates a 128-bit hash value. You can use CHAR(32) or BINARY(16)
SHA-1 generates a 160-bit hash value. You can use CHAR(40) or BINARY(20)
SHA-224 generates a 224-bit hash value. You can use CHAR(56) or BINARY(28)
SHA-256 generates a 256...
When should I use the “strictfp” keyword in java?
...
Use it for reproducible scientific results and bit-exact unit tests.
– Aleksandr Dubinsky
Jul 3 '14 at 19:49
2
...
Programmatically get the version number of a DLL
...
This works if the dll is .net or Win32. Reflection methods only work if the dll is .net. Also, if you use reflection, you have the overhead of loading the whole dll into memory. The below method does not load the assembly into memory.
// Get the file versio...
How do I expire a PHP session after 30 minutes?
... session handler, your filesystem must keep track of access times (atime). Windows FAT does not so you will have to come up with another way to handle garbage collecting your session if you are stuck with a FAT filesystem or any other filesystem where atime tracking is not available. Since PHP 4.2.3...
How to convert byte array to string and vice versa?
...
CoasterChris
7111 silver badge1010 bronze badges
answered Oct 8 '09 at 7:21
omerkudatomerkudat
8,11944 gold ...
How to generate keyboard events in Python?
...rk with a US standard keyboard.
Some parts may also only work in python 32-bit.
"""
#--- Setup ---#
from ctypes import *
from time import sleep
user32 = windll.user32
kernel32 = windll.kernel32
delay = 0.01
####################################
###---KEYBOARD CONTROL SECTION---###
#################...
How to print (using cout) a number in binary form?
...
The easiest way is probably to create an std::bitset representing the value, then stream that to cout.
#include <bitset>
...
char a = -58;
std::bitset<8> x(a);
std::cout << x << '\n';
short c = -315;
std::bitset<16> y(c);
std::cout &l...
How do I print the full value of a long string in gdb?
...aracters of a string you can use x/300s your_string. The output might be a bit harder to read. For example printing a SQL query results in:
(gdb) x/300sb stmt.c_str()
0x9cd948: "SELECT article.r"...
0x9cd958: "owid FROM articl"...
..
...