Tutorial by Examples: v

This functions takes parameter for how many recent posts you want to display. Ex : you want to display only five recent posts. Just passed the arguments with posts="5" (you can pass any number of recent posts that you want to display). Function fetch only five recent posts from database....

ggplot(iris[iris$Species == "setosa",],aes(Sepal.Width)) + geom_density() Here, we are subsetting the dataframe before passing it to ggplot. It is a very useful tool derived from the data frame data structure. To make the code more readable, one can also use dplyr's filter: libr...

In Scala you can define your own operators: class Team { def +(member: Person) = ... } With the above defines you can use it like: ITTeam + Jack or ITTeam.+(Jack) To define unary operators you can prefix it with unary_. E.g. unary_! class MyBigInt { def unary_! = ... } var ...

Assuming you have already set up an app in Android Studio, add a ListView to a layout (or skip if that's already done): <?xml version="1.0" encoding="utf-8"?> <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/...

Declare: defmodule MyApp.ViaMacros.Constants do @moduledoc """ Apply with `use MyApp.ViaMacros.Constants, :app` or `import MyApp.ViaMacros.Constants, :app`. Each constant is private to avoid ambiguity when importing multiple modules that each have their own copies of th...

Objective: Use SignalR for notification between Web API, and TypeScript/JavaScript based Web App, where Web API and the Web App is hosted in different domain. Enabling SignalR and CORS on Web API: Create a standard Web API project, and install the following NuGet packages: Microsoft.Owin.Cors ...

If you want to check the existence of one file or do a couple of actions for every file in a folder you can use the Foreach Loop Container. You give the path and the file mask and it will run it for every file it finds

One of the best uses for markup extensions is for easier usage of IValueConverter. In the sample below BoolToVisibilityConverter is a value converter but since it's instance independent it can be used without the normal hasles of a value converter with the help of markup extension. In XAML just use...

To easily link your Redux store to your React components you can use an additional library: react-redux. First, you need to wrap your app in a Provider, which is a component that passes your store to be used by child components: import { Provider } from 'react-redux'; /// ... store = createStor...

First step is create navigation interface which we will use on view model: public interface IViewNavigationService { void Initialize(INavigation navigation, SuperMapper navigationMapper); Task NavigateToAsync(object navigationSource, object parameter = null); Task GoBackAsync(); } ...

Server syntax: var io = require('socket.io')(80); io.on('connection', function (mysocket) { //emit to all but the one who started it mysocket.broadcast.emit('user connected'); //emit to all sockets io.emit('my event', { messg: 'for all'}); }); // a javascript client would listen ...

Excel -> Save as -> Save as type -> "Comma separated value (*.csv)" AND Tools (left to Save button) -> Web options -> Encoding -> Save this document as -> Unicode (UTF-8)

The pyplot interface to matplotlib might be the simplest way to close a figure. import matplotlib.pyplot as plt plt.plot([0, 1], [0, 1]) plt.close()

Using a small transparent image called empty.png public class MyPage : ContentPage { public Page() { if (Device.OS == TargetPlatform.Android) NavigationPage.SetTitleIcon(this, "empty.png"); } }

Html: <nav class="navbar navbar-defalt" data-offset-top="120" data-spy="affix" > ... </nav> Css: <style> .navbar { background-color: red; } .navbar.affix { background-color: green; } </style>

Server side Meteor.methods({ getData() { return 'Hello, world!'; } }); Client side <template name="someData"> {{#if someData}} <p>{{someData}}</p> {{else}} <p>Loading...</p> {{/if}} </template> Template.someData.on...

Server side Meteor.methods({ getData() { return 'Hello, world!'; } }); Client side <template name="someData"> {{#if someData}} <p>{{someData}}</p> {{else}} <p>Loading...</p> {{/if}} </template> Template.someData.on...

LaraDock is a Laravel Homestead like development environment but for Docker instead of Vagrant. https://github.com/LaraDock/laradock Installation *Requires Git and Docker Clone the LaraDock repository: A. If you already have a Laravel project, clone this repository on your Laravel root director...

This is an example of Serial Document Middleware In this example, We will write a middleware that will convert the plain text password into a hashed password before saving it in database. This middleware will automatically kick in when creating new user or updating existing user details. FILENA...

<stock> <add> <item> <name>Milk</name> <quantity>2</quantity> </item> </add> </stock> Putting this body to an resource like /stocks/123 violates the idea behind REST. While this bod...