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The BSP Layer

In this article by Alex González , author of the book  Embedded LinuxProjects Using Yocto Project Cookbook , we will see how the embedded Linux projects require both custom hardware and software. An early task in the development process is to test different hardware reference boards and the selection of one to base our design on. We have chosen the Wandboard, a Freescale i.MX6-based platform, as it is an affordable and open board, which makes it perfect for our needs. On an embedded project, it is usually a good idea to start working on the software as soon as possible, probably before the hardware prototypes are ready, so that it is possible to start working directly with the reference design. But at some point, the hardware prototypes will be ready and changes will need to be introduced into Yocto to support the new hardware. This article will explain how to create a BSP layer to contain those hardware-specific changes, as well as show how to work with the U-Boot bootloader and the Linux kernel, components which are likely to take most of the customization work.

Security in Microsoft Azure

In this article, we highlight some security points of interest, according to the ones explained in the book  Microsoft Azure Security , by Roberto Freato . Microsoft Azure is a comprehensive set of services, which enable Cloud computing solutions for enterprises and small businesses. It supports a variety of tools and languages, providing users with building blocks that can be composed as needed. Azure is actually one of the biggest players in the Cloud computing market, solving scalability issues, speeding up the entire management process, and integrating with the existing development tool ecosystem.

Zoom and Turn

In this article by Charlotte Olsson and Christina Hoyer , the authors of the book  Prezi Cookbook , we will cover the following recipes: Zoom in Zoom out Zooming with frames Zooming out with frames Zooming in with frames Turns Turning an element Turning a frame Anatomy of a turn Combining turns for elements and frames

Work Item Querying

In this article by Dipti Chhatrapati , author of Reporting in TFS , shows us that work items are the primary element project managers and team leaders focus on to track and identify the pending work to be completed. A team member uses work items to track their personal work queue. In order to achieve the current status of the project via work items, it's essential to query work items based on the requirements. This article will cover the following topics: Team project scenario Work item queries Search box queries Flat queries Direct link queries Tree queries

Appium Essentials

In this article by Manoj Hans , author of the book Appium Essentials , we will see how toautomate mobile apps on real devices. Appium provides the support for automating apps on real devices. We can test the apps in a physical device and experience the look and feel that an end user would.

Third Party Libraries

In this article by Nathan Rozentals , author of the book Mastering TypeScript , the author believes that our TypeScript development environment would not amount to much if we were not able to reuse the myriad of existing JavaScript libraries, frameworks and general goodness. However, in order to use a particular third party library with TypeScript, we will first need a matching definition file. Soon after TypeScript was released, Boris Yankov set up a github repository to house TypeScript definition files for third party JavaScript libraries. This repository, named DefinitelyTyped ( ) quickly became very popular, and is currently the place to go for high-quality definition files. DefinitelyTyped currently has over 700 definition files, built up over time from hundreds of contributors from all over the world. If we were to measure the success of TypeScript within the JavaScript community, then the DefinitelyTyped repository would be a good indication of how well TypeScript has been adopted. Before you go ahead and try to write your own definition files, check the DefinitelyTyped repository to see if there is one already available. In this article, we will have a closer look at using these definition files, and cover the following topics: Choosing a JavaScript Framework Using TypeScript with Backbone Using TypeScript with Angular

Designing Jasmine Tests with Spies

In this article by Munish Sethi , author of the book Jasmine Cookbook , we will see the implementation of Jasmine tests using spies.

Using Mock Objects to Test Interactions

In this article by Siddharta Govindaraj , author of the book Test-Driven Python Development , we will look at the Event class. The Event class is very simple: receivers can register with the event to be notified when the event occurs. When the event fires, all the receivers are notified of the event. A more detailed description is as follows: Event classes have a connect method, which takes a method or function to be called when the event fires When the fire method is called, all the registered callbacks are called with the same parameters that are passed to the fire method Writing tests for the connect method is fairly straightforward—we just need to check that the receivers are being stored properly. But, how do we write the tests for the fire method? This method does not change any state or store any value that we can assert on. The main responsibility of this method is to call other methods. How do we test that this is being done correctly? This is where mock objects come into the picture. Unlike ordinary unit tests that assert on object state , mock objects are used to test that the interactions between multiple objects occurs as it should.

Light Speed Unit Testing

In this article by Paulo Ragonha , author of the book Jasmine JavaScript Testing - Second Edition , we will learn Jasmine stubs and Jasmine Ajax plugin.

Solr Indexing Internals

In this article by Jayant Kumar , author of the book  Apache Solr Search Patterns , we will discuss use cases for Solr in e-commerce and job sites. We will look at the problems faced while providing search in an e-commerce or job site: The e-commerce problem statement The job site problem statement Challenges of large-scale indexing

Project Management

In this article by Patrick Li , author of the book JIRA Essentials - Third Edition , we will start with a high-level view of the overall hierarchy on how data is structured in JIRA. We will then take a look at the various user interfaces that JIRA has for working with projects, both as an administrator and an everyday user. We will also introduce permissions for the first time in the context of projects and will expand on this. In this article, you will learn the following: How JIRA structures content Different user interfaces for project management in JIRA How to create new projects in JIRA How to import data from other systems into JIRA How to manage and configure a project How to manage components and versions

Profiling an app

This article is written by Cecil Costa , the author of the book,  Swift Cookbook . We'll delve into what profiling is and how we can profile an app by following some simple steps. It's very common to hear about issues, but if an app doesn't have any important issue, it doesn't mean that it is working fine. Imagine that you have a program that has a memory leak, presumably you won't find any problem using it for 10 minutes. However, a user may find it after using it for a few days. Don't think that this sort of thing is impossible; remember that iOS apps don't terminate, so if you do have memory leaks, it will be kept until your app blows up. Performance is another important, common topic. What if your app looks okay, but it gets slower with the passing of time? We, therefore, have to be aware of this problem. This kind of test is called profiling and Xcode comes with a very good tool for realizing this operation, which is called Instruments . In this instance, we will profile our app to visualize the amount of energy wasted by our app and, of course, let's try to reduce it.

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