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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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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
...
How to become an OpenCart guru? [closed]
... extra methods the $this->db object has
$this->db->escape() uses mysql_real_escape_string() on the value passed
$this->db->countAffected returns the number of rows affected by an UPDATE query and so on
$this->db->getLastId() returns the last auto increment id using mysql_inse...
How to disable Golang unused import error
...t:
import (
"log"
"database/sql"
_ "github.com/go-sql-driver/mysql"
)
To import a package solely for its side-effects (initialization), use
the blank identifier as explicit package name.
View more at https://golang.org/ref/spec#Import_declarations
...
Name node is in safe mode. Not able to leave
...space in your node, you can check your node disk usage using :
df -h
if root partition is full, delete files or add space in your root partition and retry first step.
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How to clear the cache of nginx?
...on ~* ^.+\.(css|js|jpg|gif|png|txt|ico|swf|xml)$ {
access_log off;
root /path/to/htdocs;
expires modified +90d;
}
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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
...
Wait for a process to finish
...
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.
...
How to search file text for a pattern and replace it with a given value
...you don't care about file system permissions (either you're not running as root, or you're running as root and the file is root owned):
#!/usr/bin/env ruby
require 'tempfile'
def file_edit(filename, regexp, replacement)
Tempfile.open(".#{File.basename(filename)}", File.dirname(filename)) do |tem...