#oop Archivi - Luigi Cardarella

An Introduction to Reactive Programming with RxJava – Part 2

2016-03-142019-01-18admin

Introducing RxJava To write reactive programs, we need a library or a specific programming language, because building something like that ourselves is quite a difficult task. Java is not really a reactive programming language (it provides some tools like the java.util.Observable class, but they are quite limited). It is a statically typed, object-oriented language, and […]

An Introduction to Reactive Programming with RxJava – Part 1

2016-02-182019-01-18admin

Nowadays, the term reactive programming is trending. Libraries and frameworks in various programming languages are emerging. Blog posts, articles and presentations about reactive programming are being created. Big companies, such as Facebook, SoundCloud, Microsoft, and Netflix, are supporting and using this concept. So we, as programmers, are starting to wonder about it. Why are people […]

What Is Apache Spark

2016-01-202019-01-14admin

Apache Spark is a cluster computing platform designed to be fast and general-purpose. On the speed side, Spark extends the popular MapReduce model to efficiently support more types of computations, including interactive queries and stream processing. Speed is important in processing large datasets, as it means the difference between exploring data interactively and waiting minutes […]

Why Scala – Part 1

2015-09-182019-01-14admin

Scala is a general-purpose programming language designed to express common programming patterns in a concise, elegant, and type-safe way. It smoothly integrates features of object-oriented and functional programming languages, enabling programmers to be more productive. Martin Odersky (the creator of Scala) and his team started development on Scala in 2001 in the programming methods laboratory […]

Introduction to Entity Framework – Part2

2015-06-122019-01-18admin

Entity Framework DB First – Managing Entity Relationships In this article, we will see how to model relationships between tables in our Entity Data Model and use Entity Framework to work with these related entities. We will look at the types of relationship between the tables, and then we will see how this can be […]

Introduction to Entity Framework – Part1

2015-05-092019-01-18admin

Entity Framework is an Object Relational Mapper (ORM) from Microsoft that lets the application’s developers work with relational data as business models. It eliminates the need for most of the plumbing code that developers write (while using ADO.NET) for data access. Entity Framework provides a comprehensive, model-based system that makes the creation of a data […]

Using Test Doubles with Unit Tests – PART 1

2015-03-262019-01-18admin

Test Double is a generic term for any case where you replace a production object for testing purposes. We now introduce a significant piece of the unit testing approach—test doubles. Using test doubles is a way of creating a class whose behavior can be changed at runtime. These classes can be used to unit test […]

Starting with ASP.NET MVC 4

2015-02-092019-01-18admin

ASP.NET MVC 4 is a framework for building scalable, standards-based web applicationsusing well-established design patterns and the power of ASP.NET and the .NET Framework. This article is meant for all kind of beginner users who wanted to get started with ASP.NET MVC 4. What is ASP.NET MVC? ASP.NET supports three different development models named Web […]

Two Wrongs Can Make a Right (and Are Difficult to Fix)

2014-12-012019-01-18admin

CODE NEVER LIES, BUT IT CAN CONTRADICT ITSELF. Some contradictions lead to those “How can that possibly work?” moments. In an interview, the principal designer of the Apollo 11 Lunar Module software, Allan Klumpp, disclosed that the software controlling the engines contained a bug that should have made the lander unstable. However, another bug compensated […]

The Golden Rule of API Design

2014-11-172019-01-18admin

API DESIGN IS TOUGH, PARTICULARLY IN THE ENTERPRISE. If you are designing an API that is going to have hundreds or thousands of users, you have to think about how you might change it in the future and whether your changes might break client code. Beyond that, you have to think how users of your […]

Pay Down Your Technical Debt

2014-10-21admin

ON ANY PROJECT THAT IS IN PRODUCTION (i.e., it has customers that are using it), there will come a time when a change must be made; either a bug needs fixing, or a new feature must be added. At that point there are two possible choices: you can take the time needed to “do it […]

Queue-Centric Workflow Pattern

2014-08-182014-08-18admin

This essential pattern for loose coupling focuses on asynchronous delivery of command requests sent from the user interface to a back-end service for processing. This pattern is a subset of the CQRS pattern. The pattern is used to allow interactive users to make updates through the web tier without slowing down the web server. It […]