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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.

Making Your Data Everything It Can Be

In this article by Robert Dempsey , author of the book, Python Business Intelligence Cookbook , we will cover the steps that you need to import a file and consequently retrieve, insert, update and delete, single and multiple records.

Introducing Bayesian Inference

In this article by Dr. Hari M. Kudovely , the author of Learning Bayesian Models with R , we will look at Bayesian inference in depth. The Bayes theorem is the basis for updating beliefs or model parameter values in Bayesian inference, given the observations. In this article, a more formal treatment of Bayesian inference will be given. To begin with, let us try to understand how uncertainties in a real-world problem are treated in Bayesian approach.

Angular.js in a Nutshell

In this article by Michael Heydt , author of the book  D3.js By Example , we take an overview of the importance of MVC in AngularJS, and the benefits of AngularJS for a D3 developer.

CSS3 – Selectors and nth Rules

In this article by Ben Frain , the author of Responsive Web Design with HTML5 and CSS3 Second Edition , we'll look in detail at pseudo classes, selectors such as the :last-child and nth-child, the nth rules and nth-based selection in responsive web design.

The strange relationship between objects, functions, generators and coroutines

The strange relationship between objects, functions, generators and coroutines by Dusty Phillips In this article, I’d like to investigate some relationships between functions, objects, generators and coroutines in Python. At a theoretical level, these are very different concepts, but because of Python’s dynamic nature, many of them can appear to be used interchangeably. I discuss useful applications of all of these in my book, Python 3 Object-oriented Programming - Second Edition . In this essay, we’ll examine their relationship in a more whimsical light; most of the code examples below are ridiculous and should not be attempted in a production setting!

Using the OpenStack Dashboard

In this article by Kevin Jackson , Cody Bunch , and Egle Sigler , the authors of the book OpenStack Cloud Computing Cookbook - Third Edition , we will cover the following topics: Using OpenStack Dashboard with LBaaS Using OpenStack Dashboard with OpenStack Orchestration

Command Line Tools for DevOps

In this article by Michael Duffy, author of DevOps Automation Cookbook , we discover some basic command line tools. From the very basics of navigating the filesystem to the ability to run diagnostic tools to examine potential issues, every Linux systems administrator should have a solid grasp of command-line tools. The command line offers unparalleled power and flexibility as well as the ability to easily chain together commands to form powerful one-line scripts. Although GUI tools can generally be quicker to pick up and use than the command-line equivalents, a few of them offer the combination of concision and power that a well used combination of command-line tools can bring.

Using the Flyweight Pattern

In this article by Julien Lange , author of Swift 2 Design Patterns , we will see how the flyweight pattern can be used when the system needs to deal with a large number of similar objects. Instead of creating each element one by one, this pattern permits you to reuse an object that shares the same data.

Do more with Jupyter Notebook

In this article by Cyrille Rossant, from his book Learning IPython for Interactive Computing and Data Visualization, Second Edition , we’ll learn how to use the IPython console and Jupyter Notebook.

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