Tutorial by Examples: r

Using XML Configuration to set up Hibernate

I create a file called database-servlet.xml somewhere on the classpath. Initially your config file will look like this: <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/...

hibernate • Getting started with hibernate

Build your own Linq operators for IEnumerable

One of the great things about Linq is that it is so easy to extend. You just need to create an extension method whose argument is IEnumerable<T>. public namespace MyNamespace { public static class LinqExtensions { public static IEnumerable<List<T>> Batch<T&...

C# Language • LINQ Queries

perror

To print a user-readable error message to stderr, call perror from <stdio.h>. int main(int argc, char *argv[]) { FILE *fout; if ((fout = fopen(argv[1], "w")) == NULL) { perror("fopen: Could not open file for writing"); return EXIT_FAILURE; } r...

C Language • Error handling

Active Patterns as .NET API wrappers

Active Patterns can be used to make calling some .NET API's feel more natural, particularly those that use an output parameter to return more than just the function return value. For example, you'd normally call the System.Int32.TryParse method as follows: let couldParse, parsedInt = System.Int32....

F# • Active Patterns

Share information between different pages

One of the easiest examples of using shared services is when we want to store some data from a given page of our application, and then get that data again but from another page. One option could be to send that data as a parameter (for instance, if one page calls the other one) but if we want to us...

ionic2 • Using Services

Import data from RDBMS to HBase table

The following sqoop command will be used to import the data from RDBMS table into HBase table, if the table does not exists in HBase it will create a new table and import the data into this table sqoop import \ --query 'select emp_id, emp_name, emp_sal from employee where $CONDITIONS' \ ...

sqoop • Connecting Sqoop to other databases/datastores

Remove extra paddings to fit to a precisely measured text.

UITextView has extra paddings by default. Sometimes it's annoying especially if you want to measure some text without view instance and place them at some area precisely. Do this to remove such paddings. messageTextView.textContainerInset = UIEdgeInsetsZero messageTextView.textContainer.lineFragm...

iOS • UITextView

For

For-loops iterate over an iterating collection. An iterating collection is any class which structurally unifies with Iterator<T> or Iterable<T> types from the Haxe standard library. A for-loop which logs numbers in range 0 to 10 (exclusive) can be written as follows: for (i in 0...10) ...

haxe • Loops

Flow control

The flow or execution of a loop can be controlled by use of break and continue expressions. Break break exits the current loop. In case the loop is nested inside another loop, the parent loop is unaffected. for (i in 0...10) { for (j in 0...10) { if (j == 5) break; trace(i,...

haxe • Loops

Setup for Specflow

Pre -Requsite: Download Visual Studio IDE Create a new project Install specflow visual studio integration, Nunit Adapter & Nunit framework Download specflow for visual studio as shown below

specflow • Getting started with specflow

Lambda - Listener Example

Anonymous class listener Before Java 8, it’s very common that an anonymous class is used to handle click event of a JButton, as shown in the following code. This example shows how to implement an anonymous listener within the scope of btn.addActionListener. JButton btn = new JButton("My Butto...

Java Language • Lambda Expressions

Hello Web (Basic "Hello World"-type setup)

<html> <head> <script src="https://code.jquery.com/jquery-3.1.0.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script> <script src="https:...

backbone.js • Getting started with backbone.js

Reading the response

response = requests.get("https://api.github.com/events") text_resp = response.text JSON response: for json-formatted responses the package provides a built-in decoder response = requests.get('https://api.github.com/events') json_resp = response.json() This method will raise a Valu...

python-requests • Getting started with python-requests

Reading status codes

The attribute status_code contains the status code of the response good_req = requests.get('https://api.github.com/events') code_200 = good_req.status_code notfound_req = requests.get('https://api.github.com/not_found') code_404 = notfound_req.status_code requests.codes.__dict__ will provid...

python-requests • Getting started with python-requests

Generating model from database

In Visual Studio go to your Solution Explorer then click on Project you will be adding model Right mouse. Choose ADO.NET Entity Data Model Then choose Generate from database and click Next in next window click New Connection... and point to the database you want to generate model from (Could be M...

Entity Framework • Database first model generation

Show month and year dropdown

jQuery datepicker has two options to allow displaying dropdowns for month and year selection. These options make navigation through large timeframes easier. <input type="text" id="datepicker"> <script> $("#datepicker").datepicker({ changeMont...

jQuery UI Library • Datepicker

Installation or Setup

We have 2 way, we can install Universal app in windows 10 devices (OS/Phone). One app works for both mobile and OS 1 Install using Power Shell command Step 1: Make sure app not have any error and developed, then right click on Universal app project in solution explorer. Step 2: Select Store and C...

win-universal-app • Getting started with win-universal-app

Deferring operations using $q.defer

We can use $q to defer operations to the future while having a pending promise object at the present, by using $q.defer we create a promise that will either resolve or reject in the future. This method is not equivalent of using the $q constructor, as we use $q.defer to promisify an existing routin...

AngularJS • Angular promises with $q service

CSS3 :in-range selector example

CSS • Selectors

Even more specific loop targeting

Let's say we want to change main loop, only for specific taxonomy, or post type. Targeting only main loop on book post type archive page. add_action( 'pre_get_posts', 'my_callback_function' ); function my_callback_function( $query ) { if( !$query->is_main_query() || is_admin() ) return;...

WordPress • Alternating main loop (pre_get_posts filter)