Tutorial by Examples: int

Different ways for implementing a Generic Interface (or extending a Generic Class)

Suppose the following generic interface has been declared: public interface MyGenericInterface<T> { public void foo(T t); } Below are listed the possible ways to implement it. Non-generic class implementation with a specific type Choose a specific type to replace the formal type ...

Java Language • Generics

Thread Interruption / Stopping Threads

Each Java Thread has an interrupt flag, which is initially false. Interrupting a thread, is essentially nothing more than setting that flag to true. The code running on that thread can check the flag on occasion and act upon it. The code can also ignore it completely. But why would each Thread have...

Java Language • Concurrent Programming (Threads)

Adding a Gesture recognizer in the Interface Builder

Drag a gesture recognizer from the object library onto your view. Control drag from the gesture in the Document Outline to your View Controller code in order to make an Outlet and an Action. Notes This example comes from this fuller sample project demonstrating gesture recognizers.

iOS • UIGestureRecognizer

Spring Securitiy to protect REST API endpoints

Add below entries in pom.xml. <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-web</artifactId> <version>3.1.0.RELEASE</version> </dependency> <dependency> <groupId>org.springfr...

spring-security • Getting started with spring-security

Resource Hint: dns-prefetch, prefetch, prerender

Preconnect The preconnect relationship is similar to dns-prefetch in that it will resolve the DNS. However, it will also make the TCP handshake, and optional TLS negotiation. This is an experimental feature. <link rel="preconnect" href="URL"> DNS-Prefetch Informs bro...

HTML • Linking Resources

Writing a file using PrintStream

We can use PrintStream class to write a file. It has several methods that let you print any data type values. println() method appends a new line. Once we are done printing, we have to flush the PrintStream. import java.io.FileNotFoundException; import java.io.PrintStream; import java.time.Local...

Java Language • File I/O

Blueprint Routes

When you run sails lift with blueprints enabled, the framework inspects your controllers, models, and configuration in order to bind certain routes automatically. These implicit blueprint routes allow your app to respond to certain requests without you having to bind those routes manually in your ...

sails.js • Blueprint API

Blueprint Actions

Blueprint actions (not to be confused with blueprint action routes) are generic actions designed to work with any of your controllers that have a model of the same name (e.g. ParrotController would need a Parrot model). Think of them as the default behavior for your application. For instance, if...

sails.js • Blueprint API

Disabling Blueprint Routes

Global basis: Blueprint API configuration is defined in /config/blueprint.js file. You can enable or disable all three types of blueprint routes for all controllers from there. As example, if you want to disable blueprint shortcut routes for all of your controllers but want to keep both acti...

sails.js • Blueprint API

Printing the Value of a Pointer to an Object

To print the value of a pointer to an object (as opposed to a function pointer) use the p conversion specifier. It is defined to print void-pointers only, so to print out the value of a non void-pointer it needs to be explicitly converted ("casted*") to void*. #include <stdlib.h> /*...

C Language • Formatted Input/Output

Create a small SKView with other controls using Interface Builder

An SKView does not need to fill the whole screen and can share space with other UI controls. You can even have more than one SKView displayed at once if you wish. To create a smaller SKView amongst other controls with Interface Builder, first create a normal ViewController, then drag and drop a new...

sprite-kit • SKView

Printing the value of a variable

In order to print the value of a variable such as, set tempVar "This is a string." The argument in the puts statement is preceded by a $ sign, which tells Tcl to use the value of the variable. % set tempVar "This is a string." This is a string. % puts $tempVar This is a s...

tcl • Variables

Embedding into HTML

There are three possibilities to insert Elm code into a existing HTML page. Embed into the body tag Supposing you have compiled the Hello World example into elm.js file, you can let Elm take over the <body> tag like so: <!DOCTYPE html> <html> <body> <scri...

Elm Language • Getting started with Elm Language

Adding eslint to your Meteor project

We'll use the popular eslint-config-airbnb as a starter as well as Meteor specific rules using eslint-import-resolver-meteor. We also need to install babel-parser to lint Meteor enabled ES7 features such as async/await. cd my-project npm install --save-dev eslint-config-airbnb eslint-plugin-impor...

meteor • ESLint

Using an npm script to lint your code

Edit your package.json to add the following script : { "scripts": { "lint": "eslint .;exit 0" } } Then run it using npm run lint We use exit 0 as a trick to gracefully terminate the script when linting fails, otherwise npm will use eslint return code an...

meteor • ESLint

Printing the Difference of the Values of two Pointers to an Object

Subtracting the values of two pointers to an object results in a signed integer *1. So it would be printed using at least the d conversion specifier. To make sure there is a type being wide enough to hold such a "pointer-difference", since C99 <stddef.h> defines the type ptrdiff_t. ...

C Language • Formatted Input/Output

Introduction - basic fitting and plotting of parametric survival models with the survival package

survival is the most commonly used package for survival analysis in R. Using the built-in lung dataset we can get started with Survival Analysis by fitting a regression model with the survreg() function, creating a curve with survfit(), and plotting predicted survival curves by calling the predict m...

R Language • Survival analysis

CGPoint

One really good example of a struct is CGPoint; it's a simple value that represents a 2-dimensional point. It has 2 properties, x and y, and can be written as typedef struct { CGFloat x; CGFloat y; } CGPoint; If you used Objective-C for Mac or iOS app development before, you've almost...

Objective-C Language • Structs

Intervals and timeouts

import flash.utils.*; var intervalId:uint=setInterval(schroedingerCat,1000); // execute a function once per second and gather interval ID trace("Cat's been closed in the box."); function schroedingerCat():void { if (Math.random()<0.04) { clearInterval(intervalId); // ...

ActionScript 3 • Working with Timers

Overriding image entrypoint directive

docker run --name="test-app" --entrypoint="/bin/bash" example-app This command will override the ENTRYPOINT directive of the example-app image when the container test-app is created. The CMD directive of the image will remain unchanged unless otherwise specified: docker run -...

Docker • Running containers