Tutorial by Examples: di

Loading this Helper

This helper is loaded using the following code: In Controller itself(* can repeat again and again*) $this->load->helper('captcha'); In config/autoload.php (Load only once) $autoload['helper'] = array('captcha');

codeigniter • CAPTCHA Helper

Display Image OpenCV Java

Basic reading image from java import org.opencv.core.Core; import org.opencv.core.Mat; import org.opencv.imgcodecs.Imgcodecs; //Load native library System.loadLibrary(Core.NATIVE_LIBRARY_NAME); //Mat object used to host the image Mat imageArray; //Read image file from vile system ima...

opencv • Display Image OpenCV

Efficiently building multiple serializers with derived types specified dynamically

Where we came from Sometimes we can't provide all of the required metadata needed for the XmlSerializer framework in attribute. Suppose we have a base class of serialized objects, and some of the derived classes are unknown to the base class. We can't place an attribute for all of the classes which...

.NET Framework • XmlSerializer

Aggregation binding using templates in xmlview

XmlView: <mvc:View controllerName="sap.m.sample.ListCounter.List" xmlns:mvc="sap.ui.core.mvc" xmlns="sap.m"> <List headerText="Products" items="{products>/Products}"> <!-- Template of ...

sapui5 • Aggregation binding

RStudio code snippets

This is just a small hack for those who use self-defined functions often. Type "fun" RStudio IDE and hit TAB. The result will be a skeleton of a new function. name <- function(variables) { } One can easily define their own snippet template, i.e. like the one below ...

R Language • Writing functions in R

Redis installtion on Windows, with Node.js example

Redis has a Windows port provided by 'Microsoft Open Technologies'. You can use the msi installer found on: https://github.com/MSOpenTech/redis/releases After installation completes you can see 'Redis' is a Windows service (and it's status should be "Started") To write an 'Hello world'...

redis • Getting started with redis

If conditional shorthand

If you want to use the shorthand you can make use of conditional logic with the following shorthand. Only the string 'false' will evaluate to true (2.0). #Done in Powershell 2.0 $boolean = $false; $string = "false"; $emptyString = ""; If($boolean){ # this does not ru...

PowerShell • Conditional logic

Aggregation binding with sorting and static filters

<mvc:View controllerName="sap.m.sample.ListCounter.List" xmlns:mvc="sap.ui.core.mvc" xmlns="sap.m"> <List headerText="Fruits" items="{path:'products>/Products', sorter:{path:'Name'}, filter:{path:'Type', o...

sapui5 • Aggregation binding

UIViewController scanning for QR and displaying video input

import AVFoundation class QRScannerViewController: UIViewController, AVCaptureMetadataOutputObjectsDelegate { func viewDidLoad() { self.initCaptureSession() } private func initCaptureSession() { let captureDevice = AVCaptureDevice .defa...

iOS • QR Code Scanner

See examples under Disposable objects

Basic concept of IDisposable

Visual Basic .NET Language • Using Statement

Explaining what is method overloading and overriding.

Method Overriding and Overloading are two forms of polymorphism supported by Java. Method Overloading Method overloading (also known as static Polymorphism) is a way you can have two (or more) methods (functions) with same name in a single class. Yes its as simple as that. public class Shape{ ...

Java Language • Classes and Objects

ConcurrentDictionary augmented with Lazy'1 reduces duplicated computation

Problem ConcurrentDictionary shines when it comes to instantly returning of existing keys from cache, mostly lock free, and contending on a granular level. But what if the object creation is really expensive, outweighing the cost of context switching, and some cache misses occur? If the same key ...

.NET Framework • Dictionaries

Understanding State in Dynamic Programming

Let's discuss with an example. From n items, in how many ways you can choose r items? You know it is denoted by . Now think of a single item. If you don't select the item, after that you have to take r items from remaining n-1 items, which is given by . If you select the item, after that you hav...

dynamic-programming • Getting started with dynamic-programming

Aggregation Binding with Factory Function

XmlView: <mvc:View controllerName="sap.ui.demo.wt.controller.App" xmlns="sap.m" xmlns:mvc="sap.ui.core.mvc" displayBlock="true"> <App> <pages> <Page content="{path:'Tiles>/Tiles',fact...

sapui5 • Aggregation binding

The Basics (Tables and Inline CSS)

Tables for Layout The structure of an HTML email file is similar to that of a web page: <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Hello!</title> </head> <body> &...

email • Getting started with email

Display EdgeHTML mode

The IE=Edge meta tag is for telling the destination rendering engine to use the latest (edge) version of IE rendering engine, which enables responsive behavior in Windows phones. <meta http-equiv="X-UA-Compatible" content="IE=edge"> Occasionally this breaks images in Li...

email • Meta Information

Disable auto-scale in iOS 10 Mail

Apple iOS 10 Mail doesn't always auto-scale non-responsive emails. The auto-scale meta tag can be used to disable auto-scale feature in iOS 10 Mail entirely. <meta name="x-apple-disable-message-reformatting">

email • Meta Information

Read subset of a global raster defined by a bounding box

Open a raster that covers the globe and extract a subset of the raster. import gdal # Path to a tiff file covering the globe # http://visibleearth.nasa.gov/view.php?id=57752 tif_name = "/path_name/land_shallow_topo_21600.tif" # Open raster in read only mode ds = gdal.Open(tif_n...

gdal • Reading rasters with gdal

Create a quartz scheduler to display some information

In order to create a scheduler,the entry needs to be created in liferay-portlet.xml provding scheduler class and trigger value for timing of scheduler triggering <portlet-name>GetSetGo</portlet-name> <icon>/icon.png</icon> <scheduler-entry> ...

liferay • Create a Quartz scheduler in liferay

viridis - print and colorblind friendly palettes

Viridis (named after the chromis viridis fish) is a recently developed color scheme for the Python library matplotlib (the video presentation by the link explains how the color scheme was developed and what are its main advantages). It is seamlessly ported to R. There are 4 variants of color scheme...

R Language • Color schemes for graphics