Tutorial by Examples: io

Django is a full stack framework for web development. It powers some of the most popular websites on the Internet. To install the framework; use the pip tool: pip install django If you are installing this on OSX or Linux, the above command may result in a permission error; to avoid this error, ...

This example shows how to find circular blobs in an grayscale image. The evaluation of the circularity of a blob is done using the area and the perimeter (arc length) of the contour. The center point gets evaluated using the moments of the contour. #include "opencv/cv.h" #include &quot...

When the temp table is created by itself, it will remain while the connection is open. // Widget has WidgetId, Name, and Quantity properties public async Task PurchaseWidgets(IEnumerable<Widget> widgets) { using(var conn = new SqlConnection("{connection string}")) { ...

Pretext: These are detailed instructions on how to set up a Raspberry Pi with the Raspbian operating system. These instructions are somewhat Windows specific. Some installation steps may apply to other operating systems as well, but keep the former in mind. Contents Requirements Choosing an ...

Here is the corresponding Java configuration: Add this annotation to an @Configuration class to have the Spring Security configuration defined in any WebSecurityConfigurer or more likely by extending the WebSecurityConfigurerAdapter base class and overriding individual methods: @Configuration @En...

This example uses SqlConnection, but any IDbConnection is supported. Also any IDbTransaction is supported from the related IDbConnection. public void UpdateWidgetQuantity(int widgetId, int quantity) { using(var conn = new SqlConnection("{connection string}")) { conn.Open()...

The Java Language Specification describes Annotations as follows: An annotation is a marker which associates information with a program construct, but has no effect at run time. Annotations may appear before types or declarations. It is possible for them to appear in a place where they could a...

Declare: defmodule MyApp.ViaFunctions.Constants do def app_version, do: "0.0.1" def app_author, do: "Felix Orr" def app_info, do: [app_version, app_author] def bar, do: "barrific constant in function" end Consume with require: defmodule MyApp.ViaFuncti...

You can add a method to any class in Ruby, whether it's a builtin or not. The calling object is referenced using self. class Fixnum def plus_one self + 1 end def plus(num) self + num end def concat_one self.to_s + '1' end end 1.plus_one # => 2 3.plus(5) ...

{ "Records": [ { "eventVersion": "2.0", "eventTime": "1970-01-01T00:00:00.000Z", "requestParameters": { "sourceIPAddress": "127.0.0.1" }, "s3": { &qu...

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...

There are four predefined markup extensions in XAML: x:Type supplies the Type object for the named type. This facility is used most frequently in styles and templates. <object property="{x:Type prefix:typeNameValue}" .../> x:Static produces static values. The values come from va...

I am developing a mobile app using ionic 2 with Angular 2. I have an ion-list filled ion-items. I want those ion-item to have the ability to be deleted if needed as presented here on the ionic website. However, a lot have changed in ionic 2 since the first version and the above style of one button...

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(); } ...

You'll first send the user to the Twitch authorization endpoint. This URL is made up of a the base authorization URL (https://api.twitch.tv/kraken/oauth2/authorize) and query string parameters that define what you're requesting. The required parameters are response_type, client_id, redirect_uri, and...

When the user goes to the authorization endpoint, they will be asked to give your application permission to the scopes that you've requested. They can decline this, so you must make sure to take that into consideration in your code. After they've allowed your application access, the user will be red...

Download the Stripe API Library and place it in vendor Folder source : [https://github.com/stripe/stripe-php][1] include the library in your controller use Stripe\BalanceTransaction; use Stripe\Charge; use Stripe\Stripe; require_once('../vendor/stripe/init.php'); set the strip key \Stripe...

... "angularCompilerOptions": { "genDir": "./ngfactory" } ... This is the output folder of the compiler.

When user enters an URL, for example: http://example-website.com/Example/HelloWorld, MVC application will use the routing rules to parse this url and extract the subpath, that will determine the controller, action and possible parameters. For the above url, the result will be /Example/HelloWorld, wh...

If there would be another value in the URL like: /Example/ProcessInput/2, the routing rules will threat the last number as a parameter passed into the action ProcessInput of controller Example. public ActionResult ProcessInput(int number) { ViewData["OutputMessage"] = string.format(...