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[解决]MySql提示:The server quit without updating PID file(…)失败 - 数...
...rekfan.com/?p=186
4.mysql在启动时没有指定配置文件时会使用/etc/my.cnf配置文件，请打开这个文件查看在[mysqld]节下有没有指定数据目录(datadir)。
解决方法：请在[mysqld]下设置这一行：datadir = /usr/local/mysql/data
5.skip-federated字段问题
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Static method in a generic class?
...oid doIt(T object) {
System.out.println("shake that booty '" + object.getClass().toString()
+ "' !!!");
}
private static class KC {
}
private static class SunshineBand {
}
public static void main(String args[]) {
KC kc = new KC();
SunshineBand sunshi...
SHA1 vs md5 vs SHA256: which to use for a PHP login?
...tnik SHA512 is a good alternative. Don't get me wrong; I'm not saying a stretched and salted SHA512 hash is insecure. It's secure. Even so, the fact remains that bcrypt is more secure, and so I see no reason not to use it.
– Johannes Gorset
Feb 15 '10 at 6:41
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Rebase array keys after unsetting elements
...
+1. I note that the manual does not explicitly state that ordering will be maintained, but I can't see why it wouldn't be.
– Lightness Races in Orbit
May 9 '11 at 22:20
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Break parallel.foreach?
...reason caused the break are processed. What about a Parallel.ForEach where order of the items does not necessarily have to be the order in which they are processed? Is it guaranteed as well that all items in an IEnumerable<...> before the one that invokes state.Break() are being processed and ...
Tags for Emacs: Relationship between etags, ebrowse, cscope, GNU Global and exuberant ctags
...rimary use for the tags files is looking up class/method/function/constant/etc declaration/definitions.
cscope is much more powerful beast (at least as far as C/C++ and Java are concerned). While it operates on more or less the same principle (generating a file of useful metadata) it allows you do ...
Finding the index of an item in a list
...omplexity in list length
An index call checks every element of the list in order, until it finds a match. If your list is long, and you don't know roughly where in the list it occurs, this search could become a bottleneck. In that case, you should consider a different data structure. Note that if yo...
Execute command on all files in a directory
...d executions is redirected to
results.out
However, if you care about the order in which the files are processed, you
might be better off writing a loop. I think find processes the files
in inode order (though I could be wrong about that), which may not be what
you want.
...
PHP “php://input” vs $_POST
...still there, you just can't access it through the wrapper. So you need to fetch it yourself in raw format with file_get_contents('php://input') (as long as it's not multipart/form-data-encoded).
This is also how you would access XML-data or any other non-standard content type.
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How to test which port MySQL is running on and whether it can be connected to?
...
grep port /etc/mysql/my.cnf ( at least in debian/ubuntu works )
or
netstat -tlpn | grep mysql
verify
bind-address 127.0.0.1
in /etc/mysql/my.cnf to see possible restrictions
...