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hash function for string
...ingly slow by hash table standards.
Second, you want to ensure that every bit of the input can/will affect the result. One easy way to do that is to rotate the current result by some number of bits, then XOR the current hash code with the current byte. Repeat until you reach the end of the string. ...
php 获取操作系统、浏览器版本信息（持续更新） - 更多技术 - 清泛网 - 专...
...()
{
$agent = $_SERVER['HTTP_USER_AGENT'];
$os = false;
if (eregi('win', $agent) && strpos($agent, '95')){
$os = 'Windows 95';
}
else if (eregi('win 9x', $agent) && strpos($agent, '4.90')){
$os = 'Windows ME';
}
else if (eregi('win', $agent) && ereg('98', $agent)){
$os = 'Wi...
Installing Java on OS X 10.9 (Mavericks)
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Why would you want to use 32 bit java on a 64bit OS? 64 bit java is actually faster than 32bit under Mavericks.
– MiB
Jan 23 '14 at 15:45
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How to access data/data folder in Android device?
...w do I tell the cp command to save them to my laptop (Mac)? If you give a Win example, I'd like to know too, and will just translate it. Thanks.
– Gerard
Sep 3 '14 at 4:20
10
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How to show all shared libraries used by executables in Linux?
...n of grep doesn't support it (man indicates this is a general issue). What bit of the regexp is perl-specific?
– Bobby Jack
Sep 8 '08 at 17:36
2
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How to clean node_modules folder of packages that are not in package.json?
...
I've seen NPM prune fail to delete things usually screwing up when my corporate repository has something borked in it. Then I have to rm-rf. It would be nice if there was a "blow everythin away then reget everything all in one go" command
– ggb667
...
Is there a performance gain in using single quotes vs double quotes in ruby?
...
$ ruby -v
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin11.0.0]
$ cat benchmark_quotes.rb
# As of Ruby 1.9 Benchmark must be required
require 'benchmark'
n = 1000000
Benchmark.bm(15) do |x|
x.report("assign single") { n.times do; c = 'a string'; end}
x.report("assign doub...
C/C++ check if one bit is set in, i.e. int variable
Is there such a way to check if bit 3 in temp is 1 or 0 without bit shifting and masking.
21 Answers
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Why is  appearing in my HTML? [duplicate]
...;
// Or this
// dirname(__FILE__)
$HOME = dirname(__FILE__);
// Is this a Windows host ? If it is, change this line to $WIN = 1;
$WIN = 0;
// That's all I need
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<...
What does `dword ptr` mean?
...orrect section.
Basically, it means "the size of the target operand is 32 bits", so this will bitwise-AND the 32-bit value at the address computed by taking the contents of the ebp register and subtracting four with 0.
shar...