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Dynamically Changing log4j log level
...he documentation of org.apache.log4j.xml.DOMConfigurator.configureAndWatch(String,long) for details. The default wait time between checks is 60 seconds. These changes would be persistent, since you directly change the configuration file on the filesystem. All you need to do is to invoke DOMConfigura...
Where is the php.ini file on a Linux/CentOS PC? [duplicate]
...s you need Putty)
ssh user@ip
php -i | grep "Loaded Configuration File"
And it will show you something like this Loaded Configuration File => /etc/php.ini.
ALTERNATIVE METHOD
You can make a php file on your website, which run: <?php phpinfo(); ?>, and you can see the php.ini location o...
Java: Why is the Date constructor deprecated, and what do I use instead?
...
What Date did was parse a String, so instead we now have to substring a String which contains the year, month and day? Seems like a lot of extra hassle for something which in most cases doesn't need such complex logic and methods added to it.
...
Check if a value is in an array (C#)
...y namespace
using System.Linq;
Then you can use linq Contains() method
string[] printer = {"jupiter", "neptune", "pangea", "mercury", "sonic"};
if(printer.Contains("jupiter"))
{
Process.Start("BLAH BLAH CODE TO ADD PRINTER VIA WINDOWS EXEC"");
}
...
浅谈HTML5 & CSS3的新交互特性 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...高安全性，高效率，更大空间等优点。
7.拖拽释放(Drag and drop) API
我们可以通过HTML5的Drag and drop API来完成网页中的拖拽释放效果，避免了以往的网页在拖拽释放过程中需要不停修改元素的位置，代码繁多的弊端。
CSS3新特性
...
How to modify a text file?
I'm using Python, and would like to insert a string into a text file without deleting or copying the file. How can I do that?
...
What port is a given program using? [closed]
...
netstat -b -a lists the ports in use and gives you the executable that's using each one. I believe you need to be in the administrator group to do this, and I don't know what security implications there are on Vista.
I usually add -n as well to make it a little...
What is the benefit of using $() instead of backticks in shell scripts?
..."x is `sed ... <<<\"$y\"`"
or writing something like:
IPs_inna_string=`awk "/\`cat /etc/myname\`/"'{print $1}' /etc/hosts`
because $() uses an entirely new context for quoting
which is not portable as Bourne and Korn shells would require these backslashes, while Bash and dash don't.
S...
How to choose the id generation strategy when using JPA and Hibernate
...quence.
uuid
uses a 128-bit UUID algorithm to generate identifiers of type string that are unique within a network (the IP address is used). The UUID is encoded as a string of 32 hexadecimal digits in length.
guid
uses a database-generated GUID string on MS SQL Server and MySQL.
native
selects ident...
What does asterisk * mean in Python? [duplicate]
...=%s" % (args,)
argdict = dict(a="testa", b="testb", c="testc", excessarg="string")
foo(**argdict)
Prints:
a=testa
b=testb
c=testc
args={'excessarg': 'string'}
And
def foo(a,b,c,*args):
print "a=%s" % (a,)
print "b=%s" % (b,)
print "c=%s" % (c,)
print "args=%s" % (args,)
argtu...