Tutorial by Examples: i

Using different Properties/Configuration for different environments like dev, qa, staging etc.

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...

Node.js • Environment

Builder Pattern

Separate the construction of a complex object from its representation so that the same construction process can create different representations and and provides a high level of control over the assembly of the objects. In this example demonstrates the Builder pattern in which different vehicles ar...

C# Language • Creational Design Patterns

Infinite Loop

while true; do echo ok done or while :; do echo ok done or until false; do echo ok done

Bash • true, false and : commands

Function Return

function positive() { return 0 } function negative() { return 1 }

Bash • true, false and : commands

Code that will always/never be executed

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

Bash • true, false and : commands

Plugins

Vim plugins are addons that can be used to change or enhance functionality of vim. There is a good list of plugins at vimawesome

vim • Configuring Vim

Basic commands

Search role in Ansible Galaxy ansible-galaxy search role_name Install role from Ansible Galaxy ansible-galaxy install role_name More help ansible-galaxy --help

ansible • Galaxy

Loading Images

#include <highgui.h> //... cv::Mat img = cv::imread("img.jpg"); ...

opencv • Loading and Saving Various Media Formats

Loading Videos

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...

opencv • Loading and Saving Various Media Formats

Live Capture

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" ...

opencv • Loading and Saving Various Media Formats

Saving Videos

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...

opencv • Loading and Saving Various Media Formats

Saving Images

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....

opencv • Loading and Saving Various Media Formats

contact_picker.cs

using System; using Xamarin.Forms; namespace contact_picker { public class App : Application { public App () { // The root page of your application MainPage = new MyPage(); } protected override void OnStart () ...

Xamarin.Forms • Contact Picker - Xamarin Forms (Android and iOS)

ChooseContactPicker.cs

using System; using Xamarin.Forms; namespace contact_picker { public class ChooseContactPage : ContentPage { public ChooseContactPage () { } } }

Xamarin.Forms • Contact Picker - Xamarin Forms (Android and iOS)

ChooseContactActivity.cs

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...

Xamarin.Forms • Contact Picker - Xamarin Forms (Android and iOS)

MainActivity.cs

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 = &...

Xamarin.Forms • Contact Picker - Xamarin Forms (Android and iOS)

Common HTML Operations

If the input HTML DOM is <html> <body> <a>link</a> <div class='container' id='divone'> <p class='common' id='enclosedone'>Element One</p> <p class='common' id='enclosedtwo'>Element Two</p> ...

xpath • Getting started with xpath

Firebase All In One

Firebase Console information in detail Android : Firebase Analytics Example Steps For Android : Download code from the link Check FirebaseAnalyticsActivity That's all you will understand how's the firebase analytics works for the different scenario.

firebase • Firebase Console

Bilateral Filtering

In image processing applications, the bilateral filters are a special type of non-linear filters. There is a trade off between loosing structure and noise removal, because the most popular method to remove noise is Gaussian blurring which is not aware of structure of image; therefore, it also remov...

opencv • Image Processing

Creating custom interceptors

Interceptors require the IInterceptor interface. Any public method within the intercepted class will be intercepted (including getters and setters) public class MyInterceptor : IInterceptor { public void Intercept(IInvocation invocation) { //Calls the next method in the chain - T...

castle-windsor • Interceptors

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