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Why do we need Abstract factory design pattern?
...e a large Qt or GTK+ or .NET/Mono program that you want to run on Windows, Linux, and OSX. But you have a feature that is implemented in a different way on each platform (perhaps via the kernel32 API or a POSIX feature).
public abstract class Feature
{
public abstract int PlatformSpecificValue...
Growing Amazon EBS Volume sizes [closed]
...ocks Id System
/dev/xvdf1 2048 41943039 20970496 83 Linux
Write down Start and Id values. (in this case 2048 and 83)
Using fdisk ,delete the partition xvdf1 and create a new one that starts exactly from the same block (2048). We will give it the same Id (83):
$ sudo fdisk ...
How to get everything after last slash in a URL?
How can I extract whatever follows the last slash in a URL in Python? For example, these URLs should return the following:
...
Can't find the 'libpq-fe.h header when trying to install pg gem
...OS:
For Ubuntu/Debian systems: sudo apt-get install libpq-dev
On Red Hat Linux (RHEL) systems: yum install postgresql-devel
For Mac Homebrew: brew install postgresql
For Mac MacPorts PostgreSQL: gem install pg -- --with-pg-config=/opt/local/lib/postgresql[version number]/bin/pg_config
For OpenSuse...
Size of Matrix OpenCV
...
If you are using the Python wrappers, then (assuming your matrix name is mat):
mat.shape gives you an array of the type- [height, width, channels]
mat.size gives you the size of the array
Sample Code:
import cv2
mat = cv2.imread('sample.png'...
How do you deploy your ASP.NET applications to live servers?
...
I deploy mostly ASP.NET apps to Linux servers and redeploy everything for even the smallest change. Here is my standard workflow:
I use a source code repository (like Subversion)
On the server, I have a bash script that does the following:
Checks out t...
What is the difference between .yaml and .yml extension? [duplicate]
...tead of appveyor.yml for building the windows wheels of my YAML parser for Python).
On the other hand:
The Yaml (sic!) component of Symfony2 implements a selected subset of features defined in the YAML 1.2 version specification.
So it seems fitting that they also use a subset of the recom...
How can you detect the version of a browser?
...k app on Android). The useragent string looks something like: Mozilla/5.0 (Linux; Android 5.0; Nexus 9 Build/LRX21R; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/45.0.2454.95 Safari/537.36 [FB_IAB/FB4A;FBAV/50.0.0.10.54;] This is a very prominent user agent unfortunately so can't re...
How to really read text file from classpath in Java
... SomeTextFile.txt
And then (using the Unix path separator as I'm on a Linux box):
java -classpath code:txt dummy.Test
Results:
true
true
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C fopen vs open
...se, this depends on the operating system. It's incorrect to do the loop on Linux, AIX and some other operating systems.
– strcat
Dec 30 '13 at 22:29
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