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Check if SQL Connection is Open or Closed
...
Here is what I'm using:
if (mySQLConnection.State != ConnectionState.Open)
{
mySQLConnection.Close();
mySQLConnection.Open();
}
The reason I'm not simply using:
if (mySQLConnection.State == ConnectionState.Closed)
{
mySQLConnection.Open()...
微软VS苹果 桌面操作系统的终极一战 - 创意 - 清泛网 - 专注C/C++及内核技术
...套苹果产品（服务）的一部分。苹果所需要考虑的并不是如何靠OS X赚钱，而是如何靠OS X吸引更多的Mac用户，换言之，OS X从来没有真正意义的免费，它只是作为Mac的一部分进行销售，和消费者进行了一场朝三暮四的文字游戏。[pa...
What is the difference between a Docker image and a container?
...use boot2docker on Windows). Why do we create images for applications, say mysql? At this point, how is mysql even running? Don't I need to have a Linux image to run mysql on top of?
– Kenny Worden
Feb 17 '15 at 16:41
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How can I get column names from a table in SQL Server?
...ry to get column name and all details without using
INFORMATION_SCHEMA in MySql :
SHOW COLUMNS FROM database_Name.table_name;
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OnNotify函数 ON_NOTIFY消息总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...口就不知道哪个窗口发的(当然可以用参数进行约定)。
如何解决这个问题？
有几种思路：1.重写ON_MESSAGE宏，增加ID的限制；2.模拟按钮单击消息；3.自定义WM_NOTIFY消息。基于这些思路都不能修改MFC底层的代码。
用调试的方式查...
More elegant “ps aux | grep -v grep”
...)
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1902 0.0 0.1 82560 3580 ? Ss Oct20 0:00 /usr/sbin/sshd -D
$ ps up $(pgrep -f sshddd)
error: list of process IDs must follow p
[stderr output truncated]
$ ps up $(pgrep -f sshddd) 2>&-
[no out...
Using an image caption in Markdown Jekyll
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That is a great idea! However, site_root is not accepted as a valid variable. When rendered it ends up as src="{{ site.url_root }}....
– orschiro
Oct 14 '13 at 19:48
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How to get the filename without the extension from a path in Python?
...our own with:
>>> import os
>>> base=os.path.basename('/root/dir/sub/file.ext')
>>> base
'file.ext'
>>> os.path.splitext(base)
('file', '.ext')
>>> os.path.splitext(base)[0]
'file'
Important note: If there is more than one . in the filename, only the l...
Java: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification
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this hasn't worked for me. I have the root and the chain cert installed, but Tomcat-7 still reports validatorException caused by "unable to find valid certification path to requested target" any way to debug this?
– Cheruvim
...
How to check if a symlink exists
...else
echo "=> File doesn't exist"
fi
the result of above is like:
root@linux:~# ./sym.sh /etc/passwd
you entry is not symlink
root@linux:~# ./sym.sh /usr/mda
your entry is symlink
root@linux:~# ./sym.sh
=> File doesn't exist
...