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Content-based recommendation

In this article, by Saleem Ansari , the author of the book Building a Recommendation Engine with Scala , we will discuss content-based recommendation. The main idea in content-based recommendation system is to recommend items to a customer X similar to previous items rated highly by the same customer X. Notice in this definition that we find "similar" items, which means we need to have a measure of similarity between items. To measure similarity of two items, we decode item features and then apply a similarity function. What is a similarity function? A similarity function takes two items (or their feature representations) and returns a value that indicates degree of similarity of two items. Now, there are many different kinds of similarity functions because there are different ways we can represent an item.

Exploring Bukkit API

 In this article by Cody M. Sommer , the author of the book, Building Minecraft Server Modifications - Second Edition , we will be introduced to the Bukkit API and learn what it allows you to accomplish through programming plugins for a Spigot server. By the end of the article, you will most likely have numerous ideas for plugins that you will eventually be able to create yourself. This article will cover the following topics in detail: Understanding the purpose of an API Finding the documentation of the Bukkit API Navigating through JavaDocs to find specific information Reading and understanding the documentation Exploring and learning the aspects of the Bukkit API

Yum and Repositories

In this article by William Leemans , author of the book Red Hat Enterprise Linux Server Cookbook  he has covered the following recipes: Managing yum history Creating a copy (mirror) of any (RHN) repository Configuring additional repositories Setting up yum to automatically update Configuring logrotate for yum Recovering from a corrupted RPM database

Creating First Akka Application

In this article by Jason Goodwin , the author of the book Learning Akka , we have covered how to set up your environment and how to create a project, we can proceed with creating some actor code in Akka and then understand how to validate this code. We will be using simple build tool ( SBT ), which is the preferred build tool for Scala projects, Play Framework and Activator also use this build tool under the hood. It's not complex and we will use it only for managing dependencies and building, testing, and running the applications. So, it should not be an obstacle to learn Akka.

Maven and Jenkins Plugin

 In this article by Donald Simpson , the author of the book, Extending Jenkins , we will be "hands-on" as we try to become familiar with the tools and conventions that we need to know about when creating Jenkins plugins

Building a Navbar Custom Directive

In this article by Fernando Monteiro , author of the book AngularJS Directives Cookbook , will see explain how to build a navbar directive and adapt it to an AngularJS application. We will also explore some basic functionalities of AngularJS directives. We will use a Yeoman generator to facilitate our work and illustrate how to organize your directory structure following the AngularJS best practices from community. It is assumed that you have intermediate knowledge of developing applications using AngularJS and modern tools such as Yeoman, Bower, and Grunt. However, the following examples are exemplified didactically.

Exploring Project History

One of the most important parts of mastering a version control system is exploring project history, making use of the fact that with version control system, we have an archive of every version that has ever existed. Here, you will learn how to select, filter, and view a range of revisions, refer to revisions (revision selection), and also how to find revisions using different criteria. This article by Jakub Narebski , the author of Mastering Git , will introduce the concept of the Directed Acyclic Graph ( DAG ) of revisions and explain how it relates to the ideas of branches, tags, and current branches on Git.

Ionic JS Components

In this article by Chris Simmonds , author of the book, Getting Started with Ionic , we will cover the various Ionic JS components.

Logstash Input Plugins

In this article by Saurabh Chhajed , author of the book  Learning ELK Stack , he has covered Logstash input plugins. Logstash has a variety of plugins to help integrate it with a variety of input and output sources. Let's explore the various plugins available.

What you need to know about Servos and Motors

In this article written by Kassandra Perch , author of Learning JavaScript Robotics , we will be giving you a glimpse into robotics. We will be looking at different kinds of servos and motors, learning about some special concerns while using them, and discovering how to wire them up.

Docker in Production

In this article by Scott Gallagher , the author of Mastering Docker , we will be looking at Docker in production, pulling all the pieces together so you can start using Docker in your production environments and feel comfortable doing so. Let's take a peek at what we will be covering in this article: Setting up hosts and nodes Managing hosts and container Using Docker Compose Extending to external platforms Security

The Life and Times of an Android App

In this article by John Horton , author of the book  Android Programming for Beginners , we will look at the lifecycle of an Android app. At first it might sound a bit strange that a computer program has a lifecycle, but it will soon make sense. We will see the phases an app goes through from creation to destruction and how this helps us know where to put our Java code, depending on what we are trying to achieve. In brief we will look at: The life and times of an Android app What the method overriding @Override is The phases of the Android lifecycle What exactly we need to know and do to code our apps A lifecycle demonstration miniapp Let's start learning about the Android lifecycle.

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