Tutorial by Examples: v

The void generator class: public class VoidGenerator extends ChunkGenerator { @SuppressWarnings("deprecation") public byte[] generate(World w, Random rand, int x, int z) { byte[] result = new byte[32768]; //chunksized array filled with 0 - Air //Build a...

(ns so-doc.events (:require [goog.dom :as dom] [goog.events :as events])) (defn handle-click [event] ;an event object is passed to all events (js/alert "button pressed")) (events/listen (dom/getElement "button"); This is the dom element the event comes fro...

(ns so-doc.events) (enable-console-print!) (defn click-event [] (println "Button clicked")) (defn load-event [] (println "Page loaded!") (.addEventListener (.getElementById js/document "btn") "click" click-event false)) (.addEventListener ...

Large scale applications often need different properties when running on different environments. we can achieve this by passing arguments to NodeJs application and using same argument in node process to load specific environment property file. Suppose we have two property files for different enviro...

if true; then echo Always executed fi if false; then echo Never executed fi

Show how to use cv::VideoCapture. Here is the example of loading video from file: #include "opencv2/highgui/highgui.hpp" #include "opencv2/imgproc/imgproc.hpp" #include "opencv2/core/core.hpp" #include <iostream> using namespace cv; VideoCapture videoSourc...

Show how to use cv::VideoCapture with e.g. a webcam. Capturing frames from webcam and display it. Here is the example code: #include <iostream> #include "opencv2/highgui/highgui.hpp" #include "opencv2/imgproc/imgproc.hpp" #include "opencv2/core/core.hpp" ...

Show how to use cv::VideoWriter. #include "opencv2/highgui/highgui.hpp" #include <iostream> using namespace cv; using namespace std; int main(int argc, char* argv[]) { VideoCapture cap(0); // open the video camera no. 0 if (!cap.isOpened()) // if not success, e...

Actually, Live Capture example is good for capturing images, so I am using it to capture images and save them in a folder. #include <fstream> #include <string> #include <opencv2/highgui/highgui.hpp> #include <opencv2/core/core.hpp> #include <opencv2/imgproc/imgproc....

using Android.App; using Android.OS; using Android.Content; using Android.Database; using Xamarin.Forms; namespace contact_picker.Droid { [Activity (Label = "ChooseContactActivity")] public class ChooseContactActivity : Activity { public string type_num...

using System; using Android.App; using Android.Content; using Android.Content.PM; using Android.Runtime; using Android.Views; using Android.Widget; using Android.OS; using Xamarin.Forms; namespace contact_picker.Droid { [Activity (Label = "contact_picker.Droid", Icon = &...

To convert px to em or rem you can use the following function: @function rem-calc($size, $font-size : $font-size) { $font-size: $font-size + 0px; $remSize: $size / $font-size; @return #{$remSize}rem; } @function em-calc($size, $font-size : $font-size) { $font-size: $font-siz...

Installations Download and install: Java 8 - download the relevant installation from Oracle site. Activator - download zip from www.playframework.com/download and extract files to the target Play folder, for example to: c:\Play-2.4.2\activator-dist-1.3.5 sbt - download from www.sc...

Okay it took me about a day to figure it out so here I am posting the steps I followed to get my Database First working in a Class Project (.NET Core), with a .NET Core Web App. Step 1 - Install .NET Core Make Sure you are using .NET Core not DNX (Hint: You should be able to see the .NET Core opti...

You can make a URI parameter optional by adding a question mark to the route parameter. You can also specify a default value by using the form parameter=value. public class BooksController : Controller { // eg: /books // eg: /books/1430210079 [Route(“books/{isbn?}”)] public Act...

Another way of doing aggregations is by using the Mongo.Collection#rawCollection() This can only be run on the Server. Here is an example you can use in Meteor 1.3 and higher: Meteor.methods({ 'aggregateUsers'(someId) { const collection = MyCollection.rawCollection() const aggre...

Example: Customers who can create a post. Each customer can create multiple posts. As soon as customer creates the post, post will be under administrators review. Now we have to fetch the customers list who have all active posts by using sub-query. Note: If a customer has 5 post, among 5 posts if h...

Java Code import org.opencv.core.Mat; import org.opencv.core.MatOfRect; import org.opencv.core.Point; import org.opencv.core.Rect; import org.opencv.core.Scalar; import org.opencv.highgui.Highgui; import org.opencv.highgui.VideoCapture; import org.opencv.objdetect.CascadeClassifier; publ...

RefreshControl is used inside a ScrollView or ListView to add pull to refresh functionality. at this example we will use it with ListView 'use strict' import React, { Component } from 'react'; import { StyleSheet, View, ListView, RefreshControl, Text } from 'react-native' class RefreshContr...

Sometimes you need to replace a value matching a pattern with a new value that's based on that specific match, making it impossible to predict the new value. For these types of scenarios, a MatchEvaluator can be very useful. In PowerShell, a MatchEvaluator is as simple as a scriptblock with a singl...