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Running Bash commands in Python
...r((i=1;i<=$#;i++)); do
# Arrays are Bash-only
array[i]+=123
done''',
shell=True, check=True,
executable='/bin/bash')
A subprocess is separate from its parent, and cannot change it
A somewhat common mistake is doing something like
subprocess.run('foo=bar', shell=Tru...
Entity Attribute Value Database vs. strict Relational Model Ecommerce
... Joomla (regular relational structure):
https://forum.virtuemart.net/index.php?topic=58686.0
It seems, that Magento's EAV performance is a real showstopper.
That's why I'm leaning towards a normalized structure. To overcome the lack of flexibility I'm thinking about adding some separate data dicti...
Should I use Vagrant or Docker for creating an isolated environment? [closed]
... application in a wide variety of envionment configs (different databases, php versions, caching backends etc), then I can easily do that with docker containers. But I cant see if my application will run properly in a windows IIS env, or on BSD or OSX.
– Mixologic
...
What's the difference between equal?, eql?, ===, and ==?
...
You might be familiar with === as an equality operator in Javascript and PHP, but this just not an equality operator in Ruby and has fundamentally different semantics.
So what does === do?
=== is the pattern matching operator!
=== matches regular expressions
=== checks range membership
=== che...
Map Tiling Algorithm
...le:Object, degrees:uint):void
{
// http://www.flash-db.com/Board/index.php?topic=18625.0
var midPoint:int = tileDimension/2;
var point:Point=new Point(tile.x+midPoint, tile.y+midPoint);
var m:Matrix=tile.transform.matrix;
m.tx -= point.x;
m.ty -= point.y;
m.rotate (degree...
Aspect Oriented Programming vs. Object-Oriented Programming
...o start with Aspect Oriented Programming:
http://www.jaftalks.com/wp/index.php/introduction-to-aspect-oriented-programming/
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The Definitive C Book Guide and List
...an download the latest version as pdf here: icube-icps.unistra.fr/img_auth.php/d/db/ModernC.pdf (BTW, seems the author is updating & publish the book at above link as need)
– Eric Wang
Aug 10 '19 at 18:36
...
LINQPad [extension] methods [closed]
...mically build simple expression:
new Hyperlinq (QueryLanguage.Expression, "123 * 234").Dump();
// Dynamically build query:
new Hyperlinq (QueryLanguage.Expression, @"from c in Customers
where c.Name.Length > 3
select c.Name", "Click to run!").Dump();
You can also write your own extension metho...
Algorithm to compare two images
...).
http://en.wikipedia.org/wiki/RGB_color_space
http://upvector.com/index.php?section=tutorials&subsection=tutorials/colorspace
Another example involves something called the Hough Transform. This transform essentially decomposes an image into a set of lines. You can then take some of the '...
How do I properly clean up Excel interop objects?
...remeVBTalk .NET Office Automation forum, here: xtremevbtalk.com/showthread.php?t=303928.
– Mike Rosenblum
Jan 24 '09 at 15:15
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