Have you ever come up against an application that felt like it was built on sandMaybe you've been tasked with creating an application that needs to last longer than a year before a complete re-writeIf so, JavaScript at Scale is your missing documentation for maintaining scalable architectures. There's no prerequisite framework knowledge required for this book, however, most concepts presented throughout are adaptations of components found in frameworks such as Backbone, AngularJS, or Ember. All code examples are presented using ECMAScript 6 syntax, to make sure your applications are ready for next generation browsers.

This book is intended for cloud engineers or administrators who wish to explore and gain hands-on experience of VMware vCloud Air. To make the most of this book, it would be beneficial to have a bit of familiarity with basic VMware vCloud concepts, but no prior experience is required.

Perhaps you already know a bit about machine learning but have never used R, or perhaps you know a little R but are new to machine learning. In either case, this book will get you up and running quickly. It would be helpful to have a bit of familiarity with basic programming concepts, but no prior experience is required.

This book is targeted at those who want to gain time in their administrative tasks and profit from it to also improve their environment by reaching a more autonomous infrastructure.

This book is intended for mobile software developers who are fed up with having three different code sets for the same application. If you want to put your code on all mobile platforms with minimum fuss, and just want to develop but haven't got the time to be digging too far into a particular platform, this is the book for you. Some basic knowledge of C# is assumed.

This book is intended for those who want to understand what YARN is and how to efficiently use it for the resource management of large clusters. For cluster administrators, this book gives a detailed explanation of provisioning and managing YARN clusters. If you are a Java developer or an open source contributor, this book will help you to drill down the YARN architecture, write your own YARN applications and understand the application execution phases. This book will also help big data engineers explore YARN integration with real-time analytics technologies such as Spark and Storm.

This book is intended for those who wish to learn the concepts of game development using LibGDX. An understanding of Java and other programming languages would definitely be helpful, although this is not a must.

Extract and analyze data from complex images with ImageJ, the world’s leading image processing tool About This Book Design automated image-processing solutions and speed up image-processing tasks with ImageJ Create quality and intuitive interfaces for image processing by developing a basic framework for ImageJ plugins. Tackle even the most sophisticated datasets and complex images Who This Book Is For The book has been created for engineers, scientists, and developers eager to tackle image processing with one of the leading tools available. No prior knowledge of ImageJ is needed. Familiarity with Java programming will be required for readers to code their own routines using ImageJ. What You Will Learn Install and set up ImageJ for image processing. Process images using ImageJ’s built-in tools Create macros to perform repetitive processing tasks Set up and use an integrated development environment for ImageJ plugins Create plugins with a user-friendly interface for processing Use established ImageJ plugins for processing and quantification Generate a simple interface based on a real world example and create other interfaces for other projects Speed up interface development by setting multiple parameters interactively In Detail Advances in image processing have been vital for the scientific and technological communities, making it possible to analyze images in greater detail than ever before. But as images become larger and more complex, advanced processing techniques are required. ImageJ is built for the modern challenges of image processing – it’s one of the key tools in its development, letting you automate basic tasks so you can focus on sophisticated, in depth analysis. This book demonstrates how to put ImageJ into practice. It outlines its key features and demonstrates how to create your own image processing applications using macros and ImageJ plugins. Once you’ve got to grips with the basics of ImageJ, you’ll then discover how to build a number of different image processing solutions. From simple tasks to advanced and automated image processing, you’ll gain confidence with this innovative and powerful tool – however and whatever you are using it for. Style and approach A step-by-step guide to image processing and developing macros and plugins in ImageJ. The book will progress from using the built-in tools to macros and finally plugins for image processing.

Design and implement a robust offline app experience using Sencha Touch and PouchDB About This Book Understand the design principles behind a well-designed offline experience Create the illusion of being online when you’re really offline Use common libraries to enhance the offline experience of mobile apps with this comprehensive guide Who This Book Is For Do you want to make your app experience more robust and delightfulAre you eager to write apps that cater to a wider audience, not just the Silicon Valley crowdDo you need to persuade your peers that offline-first is a worthwhile development paradigmIf your answer to all or any one of these questions is yes, then this is the book is for you. Some previous coding and command-line experience would be useful, but is not required. What You Will Learn Convince others that the offline-first paradigm is worth doing Design the behavior of the app, taking offline, online, and the transition between those two states into account Implement the offline/online experience that you’ve designed Show the user what’s happening under the hood with online/offline indicators and Good Mobile Messaging Employ various strategies to cope with unreliable network conditions Help the user resolve conflicts related to the “split-brain” problem Choose intelligent defaults based on usage of the app Use point-to-point networking to partially overcome a lack of Internet connectivity In Detail When building mobile apps, it’s easy to forget about the moments when your users lack a good Internet connection. Try this: put your phone in airplane mode and open a few popular apps to see how they handle being offline. From Twitter to Pinterest to Apple Maps, some apps handle being offline better than others, but very few do it well. A poor offline experience will result in frustrated users who may stop using your app, or worse, turn to your competitor’s apps. Expert or novice, this book will teach you everything you need to know about designing and building a rigorous offline app experience. By putting the offline experience first, you’ll have a solid foundation to build upon, avoiding the unnecessary stress and frustration of trying to retrofit offline capabilities into your finished app. This basic principle, designing for the worst case scenario, could save you countless hours of wasted effort. Style and approach This book adopts an iterative approach to designing and building a mobile app, where each chapter builds on the one before, resulting in a fully-functional app that demonstrates the concepts taught, each one of which is explained through the use of an example.

Design scalable and robust RESTful web services with JAX-RS and Jersey extension APIs About This Book Get to grips with the portable Java APIs used for JSON processing Design solutions to produce, consume, and visualize RESTful web services using WADL, RAML, and Swagger A step-by-step guide packed with many real-life use-cases to help you build efficient and secure RESTful web APIs in Java Who This Book Is For If you are a web developer with a basic understanding of the REST concepts but are new to the idea of designing and developing RESTful web services, this is the book for you. As all the code samples for the book are written in Java, proficiency in Java is a must. What You Will Learn Introduce yourself to the RESTful software architectural style and the REST API design principles Make use of the JSR 353 APIs and Jackson API for JSON processing Build portable RESTful web APIs, making use of the JAX-RS 2.0 API Simplify API development using the Jersey extension APIs Secure your RESTful web services with various authentication and authorization mechanisms Get to grips with the various metadata solutions to describe, produce, and consume RESTful web services Understand the design and coding guidelines to build well-performing RESTful APIs See how the role of RESTful web services changes with emerging technologies and trends In Detail REST (REpresentational State Transfer) is a simple yet powerful software architecture style to create scalable web services and allow them to be simple, lightweight, and fast. The REST API uses HTTP and JSON, so that it can be used with many programming languages such as Ruby, Java, Python, and Scala. Its use in Java seems to be the most popular though, because of the API's reusability. This book is a guide to developing RESTful web services in Java using the popular RESTful framework APIs available today. You will begin with gaining an in-depth knowledge of the RESTful software architectural style and its relevance in modern applications. Further, you will understand the APIs to parse, generate, transform, and query JSON effectively. Then, you will see how to build a simple RESTful service using the popular JAX-RS 2.0 API along with some real-world examples. This book will introduce you to the Jersey framework API, which is used to simplify your web services. You will also see how to secure your services with various authentication mechanisms. You will get to grips with various solutions to describe, produce, consume, and visualize RESTful web services. Finally, you will see how to design your web services to equip them for the future technological advances, be it Cloud or mobile computing. By the end of this book, you will be able to efficiently build robust, scalable, and secure RESTful web services, making use of the JAX-RS and Jersey framework extensions. Style and approach This book is written as a step-by-step guide to designing and developing robust RESTful web services. Each topic is explained in a simple and easy-to-understand manner with lots of real-life use-cases and their solutions.

Design, build, and test LED-based projects using the Raspberry Pi About This Book Implement real LED-based projects for Raspberry Pi Learn to interface various LED modules such as LEDs, 7-segment, 4-digits 7 segment, and dot matrix to Raspberry Pi Get hands-on experience by exploring real-time LEDs with this project-based book Who This Book Is For This book is for those who want to learn how to build Raspberry Pi projects utilising LEDs, 7 segment, 4-digits 7 segment, and dot matrix modules. You also will learn to implement those modules in real applications, including interfacing with wireless modules and the Android mobile app. However, you don't need to have any previous experience with the Raspberry Pi or Android platforms. What You Will Learn Control LEDs, 7 segments, and 4-digits 7 segment from a Raspberry Pi Expand Raspberry Pi’s GPIO Build a countdown timer Build a digital clock display Display numbers and characters on dot matrix displays Build a traffic light controller Build a remote home light control with a Bluetooth low energy module and Android Build mobile Internet-controlled lamps with a wireless module and Android In Detail Blinking LED is a popular application when getting started in embedded development. By customizing and utilising LED-based modules into the Raspberry Pi board, exciting projects can be obtained. A countdown timer, a digital clock, a traffic light controller, and a remote light controller are a list of LED-based inspired project samples for Raspberry Pi. An LED is a simple actuator device that displays lighting and can be controlled easily from a Raspberry Pi. This book will provide you with the ability to control LEDs from Raspberry Pi, starting from describing an idea through designing and implementing several projects based on LEDs, such as, 7-segments, 4-digits 7 segment, and dot matrix displays. Beginning with step-by-step instructions on installation and configuration, this book can either be read from cover to cover or treated as an essential reference companion to your Raspberry Pi. Samples for the project application are provided such as a countdown timer, a digital clock, a traffic light controller, a remote light controller, and an LED-based Internet of Things, so you get more practice in the art of Raspberry Pi development. Raspberry Pi LED Blueprints is an essential reference guide full of practical solutions to help you build LED-based applications. Style and approach This book follows a step-by-step approach to LED-based development for Raspberry Pi, explained in a conversational and easy-to-follow style. Each topic is explained sequentially in the process of building an application, and detailed explanations of the basic and advanced features are included.

This is a step-by-step manual, with explanation from installation and upgrading, to the development and management of Quickr, to what-to-do-next when you finally have everything set up. It discusses problems that you might face while upgrading to the latest version. The authors show you how to get the most out of the most important features including installing, configuring, maintaining, and troubleshooting a clustered environment with Lotus Quickr. This is a step-by-step manual for System Administrators and Business Analysts who need to facilitate the effective and efficient performance of diverse teams in an interconnected world. It can also be read by Management to gain a high-level understanding of the new features and capabilities offered by the product. You don't require any knowledge of IBM Lotus Quickr 8.5. This book will teach you everything you need to know.

This is a cookbook, with practical recipes providing tips and tricks to the most common problems and scenarios faced with OpenVPN. This book is ideal for system administrators and networking professionals who are interested in building secure VPNs using OpenVPN. It is preferable that the reader has a basic knowledge of OpenVPN, as well as general network administration skills.

This book provides a step-by-step approach to the Tcl/Tk language with the help of re-usable examples and images. It is a series of carefully organized, easy-to-follow, standalone recipes to solve your queries. Whether you go through the recipes chapter-wise or pick up any recipe randomly, you will find clear and complete explanation of the task covered in the recipe. If you are a beginner interested in adding Tcl/Tk 8.5 to your list of languages, or an experienced Tcl/Tk programmer looking to sharpen your knowledge, be assured, you will find your prefect guide in this book. Whether you are developing for your personal use or commercial applications, this book will provide you with a ready reference to the building blocks of Tcl/Tk 8.5

This book is a step-by-step, tutorial-driven guide to game or application development using Panda3D that follows the process used in professional development. You will learn through first-hand experience how a Panda3D developer goes from literally nothing to a finished product. Along the way there are illustrations to explain difficult topics and to display the results of progress, as well as a complete archive of thoroughly explained code for every tutorial. Every single code file the reader saves is mirrored in the example code, finished and explained. In addition, every art and audio asset required by the tutorials is provided, so the user need not provide any assets of their own. If you are an independent developer interested in creating your own video games or other 3D applications using Panda3D for personal or commercial distribution at minimal expense, this book is definitely for you. A basic understanding of general programming, such as familiarity with the concept of a variable, is necessary. Some familiarity with object-oriented programming and the Python language is expected, but not essential. This book does not cover the creation of three dimensional models or similar art assets, nor does it cover the creation of two dimensional art assets or audio assets.

Each chapter in the book follows a themed approach to creating materials using the new Blender 2.5 features. As you read through each chapter you will learn approaches to create materials and textures. These materials and textures will help you to create a flawless simulation of real-world objects. You need not read the chapters in any particular order to learn to use the Blender 3D suite for materials simulation appropriately. Every recipe in this book will enable you to create a usable material or texture effect as well as teaching you techniques that save your time. If you are a Graphics Designer looking to master the features for materials and textures to create realistic looking models in Blender, then this book is for you. It can be read by both beginners and experienced Blender users; however, prior understanding of object creation and manipulation in Blender would be an advantage. This is a must-read for Blender users who want to learn the concepts and at the same time experiment with the different Blender Material and texture functions.

Written in cookbook style, this book offers solutions to all common web development problems through recipes. Each recipe contains step-by-step instructions followed by the analysis of what was done in each task and other useful information. The book is designed so that you can read it chapter by chapter, or you can look at the list of recipes and refer to them in no particular order. This book is particularly written for web developers looking to transfer their knowledge from the ASP.NET Web Forms way of doing things to the ASP.NET MVC framework. As this book targets readers of various experience levels, you should be able to find recipes of a basic, intermediate, and advanced nature. Regardless of your experience level, each recipe will walk you through the solution in a step by step manner that anyone should be able to follow.

This book is a step by step guide packed with interesting examples and screenshots that cover lot of support options to help you achieve the superior quality documents. This books is divided into 11 chapters, each chapter dealing with a precise aspect of the software to help you have the best overview and make the best design choices for your document. This book is for people who want to create professional-looking documents with Scribus. If you want a great looking brochure, newsletter, or poster, this is the book for you. No experience of desktop publishing software is required – only creativity and enthusiasm for creating great documents!

The recipes in this book are in a straightforward and easy to follow format.The range of topics covered in this book will bring out the forward-thinking Java developer in you. If you want to build AJAX web applications with GWT then this book is for you. Developers with prior programming experience of Java development and object-oriented programming will find this book very useful.

A practical, focused tutorial, this book provides a step-by-step guide to planning and carrying out your Microsoft Dynamics GP 2010 implementation. Detailed de*ions and illustrations of setup screens and real-world examples are also included for the Dynamics GP system and core modules. This book focuses on Dynamics GP 2010, however, most of the concepts and explanations will apply to any Dynamics GP version. If you are a new or existing Microsoft Dynamics GP consultant or end user who wants to implement, install and set-up core modules of Dynamics GP 2010, then this book is for you. A basic understanding of business management systems and either Dynamics GP or a similar application is recommended.

Written in a practical style, this book uses the Linux shell in many chapters, demonstrating the execution of commands and their output. With liberal use of screenshots and plenty of code samples accompanied by careful explanation, it will make the task of installing and configuring Koha easy and straightforward. All chapters are written in a way that makes them applicable to various Linux distributions. This book is aimed at Linux system administrators who need to install and maintain Koha. If you are a system administrator who wants to set up an open source integrated library system, then this book is for you. It will also be useful for system administrators who require help with specific aspects of implementing Koha.