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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

Need for Memory Model

int x, y; bool ready = false; void init() { x = 2; y = 3; ready = true; } void use() { if (ready) std::cout << x + y; } One thread calls the init() function while another thread (or signal handler) calls the use() function. One might expect that the use() function ...

C++ • C++11 Memory Model

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

colorspace - click&drag interface for colors

The package colorspace provides GUI for selecting a palette. On the call of choose_palette() function the following window pops-up: When the palette is chosen, just hit OK and do not forget to store the output in a variable, e.g. pal. pal <- choose_palette() The output is a function that t...

R Language • Color schemes for graphics

Listening for child updates

Take a use case, like a chat app or a collaborative grocery list app (that basically requires a list of objects to be synced across users). If you use firebase database and add a value event listener to the chat parent node or grocery list parent node, you will end with entire chat structure from th...

Android • Firebase Realtime DataBase

Sample illustration using ASP.Net Web Forms

GridView definition on ASPX page As shown below, first column of grid is defined as a checkbox column, which is conditionally cleared as shown in further examples below (the header checkbox is only for selecting/un-selecting all rows on current page, but same can be extended for all on grid easily)...

devexpress • Implementing conditional selection of Grid rows in DevExpress GridView

NgFor - Markup For Loop

The NgFor directive instantiates a template once per item from an iterable. The context for each instantiated template inherits from the outer context with the given loop variable set to the current item from the iterable. To customize the default tracking algorithm, NgFor supports trackBy option. ...

Angular 2 • Angular - ForLoop

"Spy" for partial mocking

@Spy annotation (or method) can be used to partially mock an object. This is useful when you want to partially mock behavior of a class. E.g. Assume that you have a class that uses two different services and and you want to mock only one of them and use the actual implementation of the other service...

mockito • Mock

Number formatting

//integer (not really needed unless you need to round numbers, Excel with use default cell properties) worksheet.Cells["A1:A25"].Style.Numberformat.Format = "0"; //integer without displaying the number 0 in the cell worksheet.Cells["A1:A25"].Style.Numberformat.Form...

epplus • Formatting values

Date formatting

//default DateTime patterns worksheet.Cells["A1:A25"].Style.Numberformat.Format = DateTimeFormatInfo.CurrentInfo.ShortDatePattern; //custom DateTime patters worksheet.Cells["A1:A25"].Style.Numberformat.Format = "dd-MM-yyyy HH:mm"; //or overwrite the patterns in ...

epplus • Formatting values

Recursive calculation for pi using OpenMP tasks

The code below calculates the value of PI using a recursive approach. Modify the MAX_PARALLEL_RECURSIVE_LEVEL value to determine at which recursion depth stop creating tasks. With this approach to create parallelism out of recursive applications: the more tasks you create, the more parallel tasks cr...

openmp • Irregular OpenMP parallelism

2.EJS file example(refer 1.setting up... before this)

the following is an ejs file. <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Hello, world!</title> </head> <body> <%= message %> </body> </html>

express • View engine setup

3.rendering view with express(refer 2.EJS file... before this)

app.get("/",function(req,res){ response.render("index",{ //render the index when root(/) is requested message:"rendered view with ejs" }); });

express • View engine setup

4.after rendering final HTML is created(refer 3.rendering... before this)

<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Hello, world!</title> </head> <body> message:"rendered view with ejs" </body> </html>

express • View engine setup

An evidence-based approach to Java performance tuning

Donald Knuth is often quoted as saying this: "Programmers waste enormous amounts of time thinking about, or worrying about, the speed of noncritical parts of their programs, and these attempts at efficiency actually have a strong negative impact when debugging and maintenance are considered....

Java Language • Java Performance Tuning

Send HTML Formatted Mail

You can use the same Example above Send Simple Mail with a little modification. Use msg.setContent() instead of msg.setText() and use content type html as text/html. check this msg.setContent(message, "text/html; charset=utf-8"); instead of msg.setText(message);

java-ee • The Javamail API

Salesforce ETL tools

Salesforce DataLoader Dataloader.io Jitterbit SFXOrgData DreamFactory Monarch Pentaho Kettle Talend

Salesforce • Tools for Development

Example for TVML app

For starting tvOS I assume must have knowledge of swift and iOS app. One can start reading article from apple reference document. There are 2 type of Tv app we can create one is traditional app, i.e created in xcode code would be similar as we do in iOS app. Here we take example of other type of t...

tvos • Getting started with tvos

Single Element Case Classes for Type Safety

In order to achieve type safety sometimes we want to avoid the use of primitive types on our domain. For instance, imagine a Person with a name. Typically, we would encode the name as a String. However, it would not be hard to mix a String representing a Person's name with a String representing an e...

Scala Language • Case Classes

Compound view for SVG/VectorDrawable as drawableRight

Main motive to develop this compound view is, below 5.0 devices does not support svg in drawable inside TextView/EditText. One more pros is, we can set height and width of drawableRight inside EditText. I have separated it from my project and created in separate module. Module Name : custom_edit_d...

Android • Creating Custom Views