Learn how easy it is to design and build responsive, cross-platform apps with the Enyo open source JavaScript framework. With this hands-on book, Enyo contributor Roy Sutton shows you how to get started with the framework’s core object-oriented features, including its modular design, reusable and extensible components, layout and widget libraries, easy-to-use deployment options, and support for HTML5 standards.

Before you know it, you’ll be writing native-quality apps that work equally well on smartphones, tablets, and desktops. Are you familiar with HTML, CSS, or JavaScript? Then you’re ready for Enyo.

• Start with a sample project to get the feel of Enyo right away
• Learn about Enyo’s “kinds” (component building blocks), encapsulation, inheritance, and other core features
• Design compelling and responsive apps with Enyo’s layout strategies and Layout library
• Use existing components to create new components
• Build unique user interfaces with the Onyx library and widget set
• Explore the community gallery to find and share reusable components
• Tackle debugging, performance tuning, and globalization
• Package your app for web, desktop, and mobile targets, using Bootplate, AppUp, and PhoneGap

If you’re an advanced beginner or intermediate JavaScript developer, JavaScript Enlightenment will solidify your understanding of the language—especially if you use a JavaScript library. In this concise book, JavaScript expert Cody Lindley (jQuery Cookbook) provides an accurate view of the language by examining its objects and supporting nuances.

Libraries and frameworks help you build web applications quickly and efficiently, but when things go wrong or performance becomes an issue, knowing how and why they work is critical. If you’re ready to go under the hood and get your hands dirty with JavaScript internals, this is your book.

• Get a short and digestible summary of ECMA-262, Edition 3, backed by real code you can run instantly
• Examine the creation of JavaScript objects
• Learn complex values, primitive values, scope, and inheritance
• Understand the importance of the head object
• Work with string, number, and Boolean objects and values
• Discover how to use the null value and the built-in math object
• Get into the details—beyond Mozilla’s reference guide for JavaScript 1.5

Go under the hood of an operating Voice over IP network, and build your knowledge of the protocols and architectures used by this Internet telephony technology. With this concise guide, you’ll learn about services involved in VoIP and get a first-hand view of network data packets from the time the phones boot through calls and subsequent connection teardown.

With packet captures available on the companion website, this book is ideal whether you’re an instructor, student, or professional looking to boost your skill set. Each chapter includes a set of review questions, as well as practical, hands-on lab exercises.

• Learn the requirements for deploying packetized voice and video
• Understand traditional telephony concepts, including local loop, tip and ring, and T carriers
• Explore the Session Initiation Protocol (SIP), VoIP’s primary signaling protocol
• Learn the operations and fields for VoIP’s standardized RTP and RTCP transport protocols
• Delve into voice and video codecs for converting analog data to digital format for transmission
• Get familiar with Communications Systems H.323, SIP’s widely used predecessor
• Examine the Skinny Client Control Protocol used in Cisco VoIP phones in networks around the world

Launch into Sencha Touch 2 with this hands-on book, and quickly learn how to develop robust mobile web apps that look and behave like native applications. Using numerous code samples, author Adrian Kosmaczewski guides you every step of the way through this touchscreen-enabled JavaScript framework—from creating your first basic app to debugging, testing, and deploying a finished product.

Learn how to craft user interfaces, build forms, and manage data, then deploy as either an HTML5 offline app or as a native app for Android, iOS, or Blackberry.

• Define classes and create instances with Sencha Touch’s object-oriented abstraction
• Build user interfaces with the framework’s extensive set of high-level components
• Develop apps that consume complex data, whether it’s stored locally or on remote servers
• Organize your application code in a consistent, predictable, and maintainable way
• Use Sass stylesheets to craft a personalized look and feel for your app
• Debug, test, and document your app with WebKit Web Inspector, Jasmine, Siesta, and JSDuck
• Use the Sencha Architect UI designer and IDE to simplify complex project development

Cloud services are just as susceptible to network outages as any other platform. This concise book shows you how to prepare for potentially devastating interruptions by building your own resilient and reliable applications in the public cloud. Guided by engineers from 9apps—an independent provider of Amazon Web Services and Eucalyptus cloud solutions—you’ll learn how to combine AWS with open source tools such as PostgreSQL, MongoDB, and Redis.

This isn’t a book on theory. With detailed examples, sample scripts, and solid advice, software engineers with operations experience will learn specific techniques that 9apps routinely uses in its cloud infrastructures.

• Build cloud applications with the “rip, mix, and burn” approach
• Get a crash course on Amazon Web Services
• Learn the top ten tips for surviving outages in the cloud
• Use elasticsearch to build a dependable NoSQL data store
• Combine AWS and PostgreSQL to build an RDBMS that scales well
• Create a highly available document database with MongoDB Replica Set and SimpleDB
• Augment Redis with AWS to provide backup/restore, failover, and monitoring capabilities
• Work with CloudFront and Route 53 to safeguard global content delivery

If you’re comfortable with jQuery but a bit shaky with JavaScript, this concise guide will help you expand your knowledge of the language—especially the code that jQuery covers up for you. Many jQuery devotees write as little code as possible, but with some JavaScript under your belt, you can prevent errors, reduce overhead, and make your application code more efficient.

This book explores event handling, prototypes, and working with the DOM and AJAX through examples and lots of code. You’ll learn common conventions and patterns in JavaScript and—if you’ve never coded with JavaScript before—a tutorial will take you through the basics.

• Enhance your jQuery code by using object constructors and prototypes
• Reduce overhead and gain more control by handling events with JavaScript
• Work with the DOM much faster with JavaScript than you can with jQuery
• Send a few AJAX requests without having to load the entire jQuery library
• Understand the importance of JavaScript code standards, comments, code reuse, and anti-patterns
• Enlist JavaScript resources, such as a good IDE, a syntax checker, and version control

If you’re new to Erlang, its functional style can seem difficult, but with help from this hands-on introduction, you’ll scale the learning curve and discover how enjoyable, powerful, and fun this language can be.

Author Simon St. Laurent shows you how to write simple Erlang programs by teaching you one basic skill at a time. You’ll learn about pattern matching, recursion, message passing, process-oriented programming, and establishing pathways for data rather than telling it where to go. By the end of your journey, you’ll understand why Erlang is ideal for concurrency and resilience.

• Get cozy with Erlang’s shell, its command line interface
• Become familiar with Erlang’s basic structures by working with numbers
• Discover atoms, pattern matching, and guards: the foundations of your program structure
• Delve into the heart of Erlang processing with recursion, strings, lists, and higher-order functions
• Create processes, send messages among them, and apply pattern matching to incoming messages
• Store and manipulate structured data with Erlang Term Storage and the Mnesia database
• Learn about Open Telecom Platform, Erlang’s open source libraries and tools

Connect your enterprise to a wide range of SaaS platforms, Open APIs, and social networks quickly and without difficulty. Through step-by-step instructions and numerous real-world examples, this concise guide shows you how to seamlessly integrate the external services you need with Mule ESB and its powerful Cloud Connect toolset.

You’ll learn how to use service-specific connectors for many popular APIs—including Salesforce, Twitter, LinkedIn, and Twilio—through easy-to-learn abstractions. If Mule doesn’t have a connector for the resource you need, you’ll learn how to build your own. You’ll discover how easy it is to reach beyond the enterprise firewall for a host of Internet resources.

• Discover the advantages of using Mule Cloud Connect over typical web service clients and protocols
• Learn how Cloud Connectors eliminate the need to understand the underlying API of each service
• Get started with the latest real-time technologies, including REST, WebHooks, and Streaming APIs
• Integrate OAuth secure APIs and understand their role in authorization and information sharing
• Delve into advanced topics such as multi-tenancy and connection management
• Build your own custom connectors with the Mule DevKit

Build your own distributed sensor network to collect, analyze, and visualize real-time data about our human environment—including noise level, temperature, and people flow. With this hands-on book, you’ll learn how to turn your project idea into working hardware, using the easy-to-learn Arduino microcontroller and off-the-shelf sensors.

Authors Alasdair Allan and Kipp Bradford walk you through the entire process, from prototyping a simple sensor node to performing real-time analysis on data captured by a deployed multi-sensor network. Demonstrated at recent O’Reilly Strata Conferences, the future of distributed data is already here. If you have programming experience, you can get started immediately.

• Wire up a circuit on a breadboard, and use the Arduino to read values from a sensor
• Add a microphone and infrared motion detector to your circuit
• Move from breadboard to prototype with Fritzing, a program that converts your circuit design into a graphical representation
• Simplify your design: learn use cases and limitations for using Arduino pins for power and grounding
• Build wireless networks with XBee radios and request data from multiple sensor platforms
• Visualize data from your sensor network with Processing or LabVIEW

How do you use Windows PowerShell to navigate the filesystem, manage files and folders, or retrieve a web page? This introduction to the PowerShell language and scripting environment provides more than 400 task-oriented recipes to help you solve all kinds of problems. Intermediate to advanced system administrators will find more than 100 tried-and-tested scripts they can copy and use immediately.

Updated for PowerShell 3.0, this comprehensive cookbook includes hands-on recipes for common tasks and administrative jobs that you can apply whether you’re on the client or server version of Windows. You also get quick references to technologies used in conjunction with PowerShell, including format specifiers and frequently referenced registry keys to selected .NET, COM, and WMI classes.