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Find all controls in WPF Window by type
...lection = control.Children.OfType<myType>();
where control is the root element of the window.
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从网购到火车票，对比淘宝12306网为何如此烂？ - 大数据 & AI - 清泛网 - ...
...15TB日志，访问1931亿次内存数据块，13亿个物理读，核心MySQL集群一天支持了20亿个事务。
淘宝的技术人员以实际行动让网民折服，虽然在淘宝双十一活动刚开始的10分钟内的访问高峰期内，购物车和支付宝都出现了打不开的情况...
How to debug a Flask app
...on-dotenv in your virtual environment.
Create a .flaskenv in your project root. By project root, I mean the folder which has your app.py file
Inside this file write the following:
FLASK_APP=myapp
FLASK_ENV=development
Now issue the following command:
flask run
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Alternate output format for psql
...
If you looking for equivalent to \G from Mysql, try append \x\g\x to the end of query or define shortcut in ~/.psqlrc adding \set G '\\set QUIET 1\\x\\g\\x\\set QUIET 0', then use on the end :G. (note lack of semicolons)
– Sławomir Lenart
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php $_POST array empty upon form submission
...e a custom CMS i've built that works perfectly on my dev box (Ubuntu/PHP5+/MySQL5+).
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How to clear the cache of nginx?
...on ~* ^.+\.(css|js|jpg|gif|png|txt|ico|swf|xml)$ {
access_log off;
root /path/to/htdocs;
expires modified +90d;
}
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Name node is in safe mode. Not able to leave
...space in your node, you can check your node disk usage using :
df -h
if root partition is full, delete files or add space in your root partition and retry first step.
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How to access the local Django webserver from outside world
...heck that your application is listening successfully by running lsof -i as root on the machine and look for a python entry with the corresponding port you've specified.
Non-root users generally cannot bind to ports < 1024.
You'll need to look at iptables -nvL to see if there's a rule that would...
Gulp command not found after install
... case, once I ran:
npm config set prefix /usr/local
I confirmed the npm root -g was pointing to /usr/local/lib/node_modules/npm, but in order to install gulp in /usr/local/lib/node_modules, I had to use sudo:
sudo npm install gulp -g
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Wait for a process to finish
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I found "kill -0" does not work if the process is owned by root (or other), so I used pgrep and came up with:
while pgrep -u root process_name > /dev/null; do sleep 1; done
This would have the disadvantage of probably matching zombie processes.
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