Tutorial by Examples: ha

Both are used to define error handling for a website, but different software refers to different config elements. customErrors are a legacy (backwards compatable) element, used by Visual Studio Development Server (aka. VSDS or Cassini). httpErrors are the new element which is only used by IIS7. T...

If a file is changed, but you don't like to commit it, set the file as "Assume unchanged" Revert "Assume unchanged" Need some steps:

A-Frame 0.x0.3 A-Frame provides an implementation for supporting multiple types of 6DoF controllers (Vive, Oculus Touch) via the hand-controls component. The hand-controls component is primarily for 6DoF controllers since it’s geared towards room scale interactions such as grabbing objects. The han...

JavaScript: const MainPage = { template: '#mainpage-template' } const Page1 = { template: '#page1-template' } const Page2 = { template: '#page2-template' } const Page3 = { template: '#page3-template' } const router = new VueRouter({ mode: 'hash', routes: [{ path: ...

The function EventEmitter.eventNames() will return an array containing the names of the events currently subscribed to. const EventEmitter = require("events"); class MyEmitter extends EventEmitter{} var emitter = new MyEmitter(); emitter .on("message", function(){ //list...

If You have Role: +-----------------------------+ | roleId | name | discription | +-----------------------------+ Rights: +-----------------------------+ | rightId | name | discription| +-----------------------------+ rightrole +------------------+ | roleId | rightId | +----------...

scons describes running phases itself. Running it over an empty SConstruct yields this: $ scons scons: Reading SConscript files ... scons: done reading SConscript files. scons: Building targets ... scons: `.' is up to date. scons: done building targets. To suppress phase messages, add -Q op...

Doc is an interface and the Java Print Service API provide a simple implementation called SimpleDoc. Every Doc instance is basically made of two aspects: the print data content itself (an E-mail, an image, a document etc) the print data format, called DocFlavor (MIME type + Representation class...

When the active property gets toggled, the component will notify the camera system to change the current camera used by the renderer: var secondCameraEl = document.querySelector('#second-camera'); secondCameraEl.setAttribute('camera', 'active', true);

Because Node.js runs on a single process uncaught exceptions are an issue to be aware of when developing applications. Silently Handling Exceptions Most of the people let node.js server(s) silently swallow up the errors. Silently handling the exception process.on('uncaughtException', functio...

Seismic is an Android device shake detection library by Square. To use it just start listening to the shake events emitted by it. @Override protected void onCreate(Bundle savedInstanceState) { sm = (SensorManager) getSystemService(SENSOR_SERVICE); sd = new ShakeDetector(() -> { /* rea...

Node js code Sample to start this topic is Node.js server communicating with Arduino via serialport. npm install express --save npm install serialport --save Sample app.js: const express = require('express'); const app = express(); var SerialPort = require("serialport"); var po...

Most Singleton examples use MonoBehaviour as the base class. The main disadvantage is that this Singleton class only lives during run time. This has some drawbacks: There is no way of directly editing the singleton fields other than changing the code. No way to store a reference to other assets...

For the most printing clients, is extremely useful to know if a print job has finished or failed. The Java Print Service API provide some functionalities to get informed about these scenarios. All we have to do is: provide an implementation for PrintJobListener interface and register this impl...

import threading import time class StoppableThread(threading.Thread): """Thread class with a stop() method. The thread itself has to check regularly for the stopped() condition.""" def __init__(self): super(StoppableThread, self).__init__()...

The advantage of immutability comes with concurrency. It is difficult to maintain correctness in mutable objects, as multiple threads could be trying to change the state of the same object, leading to some threads seeing a different state of the same object, depending on the timing of the reads and ...

Since BackAndroid is deprecated. Use BackHandler instead of BackAndroid. import { BackHandler } from 'react-native'; {...} ComponentWillMount(){ BackHandler.addEventListener('hardwareBackPress',()=>{ if (!this.onMainScreen()) { this.goBack(); return true; ...

The "Host:" header is a normal way an HTTP client tells the HTTP server which server it speaks to. By passing custom modified "Host:" header you can have the server respond with the content of the site, even if you didn't actually connect to the host name. For example, if you ha...

You can also use tee command to store the output of a command in a file and redirect the same output to another command. The following command will write current crontab entries to a file crontab-backup.txt and pass the crontab entries to sed command, which will do the substituion. After the substi...

A HandlerThread can be used to start a thread with a Looper. This looper then can be used to create a Handler for communications with it. HandlerThread thread = new HandlerThread("thread-name"); thread.start(); Handler handler = new Handler(thread.getLooper());