Tutorial by Examples: l

Don't you hate it when interfaces pollute you class with too many members you don't even care about? Well I got a solution! Explicit Implementations public interface IMessageService { void OnMessageRecieve(); void SendMessage(); string Result { get; set; } int Encoding { get; se...

Dictionary<TKey, TValue> is a map. For a given key there can be one value in the dictionary. using System.Collections.Generic; var people = new Dictionary<string, int> { { "John", 30 }, {"Mary", 35}, {"Jack", 40} }; // Reading data Console.Wri...

Strict-Transport-Security: max-age=31536000; includeSubDomains; preload HSTS is activated only after a successful HTTPS request to the server with a valid certificate. There is still a risk of a first-time user accessing the site, at which point a Man-in-the-Middle attack is possible. To make th...

Note: Before upgrading your Rails app, always make sure to save your code on a version control system, such as Git. To upgrade from Rails 4.2 to Rails 5.0, you must be using Ruby 2.2.2 or newer. After upgrading your Ruby version if required, go to your Gemfile and change the line: gem 'rails', '...

export class MyViewModel { selectedFiles; } <template> <input type="file" files.bind="selectedFiles"> </template>

Strings Array When selecting a value in the select dropdown and providing an array of strings, the selected value will be bound to the select element's value property as a string that we can display using string interpolation. export class MyViewModel { animals = []; favouriteAnimal = nu...

Binding to the browser native style attribute using Aurelia. If using string interpolation, you should use the css alias so styling works in Internet Explorer. Style String export class MyViewModel { constructor() { this.styleString = 'color: #F2D3D6; background-color: #333'; } } &l...

When using show.bind the element remains in the page and is either hidden or visible through the use of display:none or display:block behind the scenes. export class MyViewModel { isVisible = false; } <template> <div show.bind="isVisible"><strong>I can be b...

Unlike show.bind when using if.bind the element will be removed from the page if the supplied binding value is false or added into the page if the value is true. export class MyViewModel { isVisible = false; } <template> <div if.bind="isVisible"><strong>If ...

Create a server.js file with the following contents: 'use strict'; const Hapi = require('hapi'); // Create a server instance const server = new Hapi.Server(); // Specify connections (server available on http://localhost:8000) server.connection({ port: 8000 }); // Add a route ...

Detailed instructions on getting django-cms set up or installed.

The following are the steps to start an Eclipse remote debugger. This is useful when the application is not started from a server instance within Eclipse. This feature is really powerful and can also help debugging code which resides in the test or production environment. Let's have a look at the se...

Detailed instructions on getting android-intent set up or installed.

LTRIM and RTRIM remove characters from the beginning or the end (respectively) of a string. A set of one or more characters may be supplied (default is a space) to remove. For example, select LTRIM('<===>HELLO<===>', '=<>') ,RTRIM('<===>HELLO<===>', '=<>'...

Create Oracle error log table ERR$_EXAMPLE for existing EXAMPLE table: EXECUTE DBMS_ERRLOG.CREATE_ERROR_LOG('EXAMPLE', NULL, NULL, NULL, TRUE); Make writing operation with SQL: insert into EXAMPLE (COL1) values ('example') LOG ERRORS INTO ERR$_EXAMPLE reject limit unlimited;

Query: WITH generator ( value ) AS ( SELECT 1 FROM DUAL UNION ALL SELECT value + 1 FROM generator WHERE value < 10 ) SELECT value FROM generator; Output: VALUE ----- 1 2 3 4 5 6 7 8 9 10

Sample Data: CREATE TABLE table_name ( value VARCHAR2(50) ); INSERT INTO table_name ( value ) VALUES ( 'A,B,C,D,E' ); Query: WITH items ( list, item, lvl ) AS ( SELECT value, REGEXP_SUBSTR( value, '[^,]+', 1, 1 ), 1 FROM table_name UNION ALL SELECT value, ...

For creating new user, We need to follow simple steps as below : Step 1: Login to MySQL as root $ mysql -u root -p Step 2 : We will see mysql command prompt mysql> CREATE USER 'my_new_user'@'localhost' IDENTIFIED BY 'test_password'; Here, We have successfully created new user, But this u...

we can create a new controller with rails g controller command. $ bin/rails generate controller controller_name The controller generator is expecting parameters in the form of generate controller ControllerName action1 action2. The following creates a Greetings controller with an action of hell...

public class App : Application { internal static NavigationPage NavPage; public App () { // The root page of your application MainPage = new RootPage(); } } public class RootPage : MasterDetailPage { public RootPage() { var menuPage = ne...