Tutorial by Examples: io

Detailed instructions on getting tortoisesvn set up or installed.

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Every Heroku app runs in at least two environments: on Heroku (we’ll call that production) and on your local machine (development). If more than one person is working on the app, then you’ve got multiple development environments - one per machine, usually. Usually, each developer will also have a te...

Let's start using ExtJS to build a simple web application. We will create a simple web application which will have only one physical page (aspx/html). At a minimum, every ExtJS application will contain one HTML and one JavaScript file—usually index.html and app.js. The file index.html or your defa...

For a C-style function call, e.g. plus(a, b); // Parentheses surrounding only the arguments, comma separated Then the equivalent Haskell code will be (plus a b) -- Parentheses surrounding the function and the arguments, no commas In Haskell, parentheses are not explicitly required for functi...

In the previous example, we didn't end up needing the parentheses, because they did not affect the meaning of the statement. However, they are often necessary in more complex expression, like the one below. In C: plus(a, take(b, c)); In Haskell this becomes: (plus a (take b c)) -- or equivale...

In Haskell, functions can be partially applied; we can think of all functions as taking a single argument, and returning a modified function for which that argument is constant. To illustrate this, we can bracket functions as follows: (((plus) 1) 2) Here, the function (plus) is applied to 1 yiel...

As another example, we have the function map, which takes a function and a list of values, and applies the function to each value of the list: map :: (a -> b) -> [a] -> [b] Let's say we want to increment each value in a list. You may decide to define your own function, which adds one to...

Go to File -> Project Structure -> Modules. Add new Hibernate module. Right click on the desired module -> Add -> Hibernate. Select the newly created Hibernate configuration option, and click the (+) sign in the right pane to create hibernate.cfg.xml file. Go to File -> Project ...

Detailed instructions on getting tastypie set up or installed.

When declaring an annotation, meta-info can be included using the following meta-annotations: @Target: specifies the possible kinds of elements which can be annotated with the annotation (classes, functions, properties, expressions etc.) @Retention specifies whether the annotation is store...

You can use aspnetcore-spa generator for Yeoman to create brand-new single page application with asp.net core. This allows you to choose one of the popular front end frameworks and generates project with webpack, dev server, hot module replacement and server-side rendering features. Just run npm ...

In windows Platform Step 1: Installation of Ruby If you already have installed ruby in your pc then you can skip this step. Go to rubyinstaller.org's download page and download one of the stable version of ruby corresponding to architecture of your windows platform. Again download development ...

CF keeps you logged in. I sometimes have to switch between regions and don't always know where I am #Where am I? cf target #Login. This is logging in to the UK region of bluemix. Replace eu-gb with ng to go to the US. cf login -a https://api.eu-gb.bluemix.net #List spaces cf spaces #C...

It is common to use javax.sql.DataSource with JNDI in application server containers, where you register a data source under a name and look it up whenever you need a connection. This is code that demonstrates how data sources work: /** * Create a data source with connection pool for PostgreSQL c...

CDI is a Java EE specification. It specifies how things should be done, and which features must be provided, but it isn't actually a specific library or set of code. In order to use CDI, you will need to use a CDI implementation. The reference implementation of the CDI spec is a set of libraries kn...

You can install Solr in any system where a suitable Java Runtime Environment (JRE) is available, as detailed below. Currently this includes Linux, OS X, and Microsoft Windows. You will need the Java Runtime Environment (JRE) version 1.8 or higher. At a command line, check your Java version like thi...

Given the following class: public class FinalizableObject { public FinalizableObject() { Console.WriteLine("Instance initialized"); } ~FinalizableObject() { Console.WriteLine("Instance finalized"); } } A program that create...

As Dispose() and finalizers are aimed to different purposes, a class managing external memory-heavy resources should implement both of them. The consequence is writing the class so that it handles well two possible scenarios: When only the finalizer is invoked When Dispose() is invoked first and...

The common case for injecting dependencies into a class is with constructor injection. This involves annotating a constructor on the class with @Inject. The CDI manager will look for a constructor with the @Inject annotation when creating an instance of the class. When it finds an @Inject-annotated ...