Tutorial by Examples: ti

There are following setups to install opencart on your webserver Download the latest version of opencart for the official website or github and extract the files. In extracted files you can see the upload folder, license.txt file and readme.txt file The upload folder contains all the files to...

Alternate ways to install SymPy from conda. conda is the recommended way, but these are some alternate ways. Including: git, pip, etc.

NSIS installer can be downloaded from http://nsis.sourceforge.net/Download. An exe of 1.6 MB will be downloaded. You can install it using the wizard. While installing there are options to install 1. Full: Installs all the components 2. Lite: Basic and only essential components from the UI 3. Mi...

This function will insert an element into an array at a given index: insert(){ h=' ################## insert ######################## # Usage: # insert arr_name index element # # Parameters: # arr_name : Name of the array variable # index : Index to insert at #...

foo() { while [[ "$#" -gt 0 ]] do case $1 in -f|--follow) local FOLLOW="following" ;; -t|--tail) local TAIL="tail=$2" ;; esac shift done echo "FOLLOW: $FOLLOW" echo "TAIL: $...

ps aux | grep <search-term> shows processes matching search-term Example: root@server7:~# ps aux | grep nginx root 315 0.0 0.3 144392 1020 ? Ss May28 0:00 nginx: master process /usr/sbin/nginx www-data 5647 0.0 1.1 145124 3048 ? S Jul18 2:53 nginx: worke...

core.async is about making processes that take values from and put values into channels. (require [clojure.core.async :as a]) Creating channels with chan You create a channel using the chan function: (def chan-0 (a/chan)) ;; unbuffered channel: acts as a rendez-vous point. (def chan-1 (a/chan...

/** * @var \Vendor\Module\Helper\Data */ protected $customHelper; /** * Constructor call * @param \Vendor\Module\Helper\Data $customHelper */ public function __construct( \Vendor\Module\Helper\Data $customHelper ) { $this->customHelper = $customHelper; parent::__co...

You can improve the security for data transit or storing by implementing encrypting techniques. Basically there are two approaches when using System.Security.Cryptography: symmetric and asymmetric. Symmetric Encryption This method uses a private key in order to perform the data transformation. ...

Many modern Prolog systems are in continuous development and have added new features to address classic shortcomings of the language. Unfortunately, many Prolog textbooks and even teaching courses still introduce only the outdated prolog. This topic is intended to illustrate how modern Prolog has ov...

Traditionally Prolog performed arithmetic using the is and =:= operators. However, several current Prologs offer CLP(FD) (Constraint Logic Programming over Finite Domains) as a cleaner alternative for integer arithmetic. CLP(FD) is based on storing the constraints that apply to an integer value and ...

Traditionally in Prolog, "functions" (with one output and bound inputs) were written as regular predicates: mangle(X,Y) :- Y is (X*5)+2. This can create the difficulty that if a function-style predicate is called multiple times, it is necessary to "daisy chain" temporary vari...

int width = 256; //in pixels int height = 256; //in pixels BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_4BYTE_ABGR); //BufferedImage.TYPE_4BYTE_ABGR - store RGB color and visibility (alpha), see javadoc for more info Graphics g = image.createGraphics(); //draw w...

BufferedImage cat = ImageIO.read(new File("cat.jpg")); //read existing file //modify it Graphics g = cat.createGraphics(); g.setColor(Color.RED); g.drawString("Cat", 10, 10); g.dispose(); //now create a new image BufferedImage cats = new BufferedImage(256, 256, Buffere...

BufferedImage image = new BufferedImage(256, 256, BufferedImage.TYPE_INT_ARGB); //you don't have to use the Graphics object, you can read and set pixel color individually for (int i = 0; i < 256; i++) { for (int j = 0; j < 256; j++) { int alpha = 255; //don't forget this, or ...

Let's say you want to test method which throws an exception class Car { /** * @throws \Exception */ public function drive() { throw new \Exception('Useful message', 1); } } You can do that by enclosing the method call into a try/catch block and making a...

Applets could easily be used to create a GUI. They act like a Container and have an add() method that takes any awt or swing component. public class MyGUIApplet extends JApplet{ private JPanel panel; private JButton button; private JComboBox<String> cmbBox; private JText...

A VIEW acts very much like a table. Although you can UPDATE a table, you may or may not be able to update a view into that table. In general, if the SELECT in the view is complex enough to require a temp table, then UPDATE is not allowed. Things like GROUP BY, UNION, HAVING, DISTINCT, and some su...

To install the software: After the download completes, run the installer. For Windows, the installer executable file has the .exe extension. Double-click the installer file to run it. For Linux platforms, the installer file has the .sh extension. For these platforms, you need to make ...

To install the software: After the download completes, run the installer. The installer file has the .dmg extension. On the panel that opens double-click the package icon. The package has the .pkg extension. The installation wizard starts. Click Continue when the "This package will run a p...