Expert techniques for building fast servers and scalable, real-time network applications with minimal effort; rewritten for Node.js 8 and Node.js 9 About This Book ? Packed with practical examples and explanations, Mastering Node.js contains everything you need to take your applications to the next level. ? Unleash the full potential of Node.js 9 to build real-time and scalable applications. ? Gain in-depth knowledge of asynchronous programming, event loops, and parallel data processing. ? Explore Node's innovative event-non-blocking design, and build professional applications with the help of detailed examples. Who This Book Is For This book is targeted at JavaScript developers who want to take an in-depth look at the latest Node.js framework to create faster, scalable, real-time backend applications. Basic JavaScript programming knowledge—and also some previous Node.js development experience—are mandatory to get the best out of this book What You Will Learn ? Build an Electron desktop app using Node that manages a filesystem ? Explore Streams and understand how they apply to building networked services ? Develop and deploy an SMS-driven customer service application ? Use WebSockets for rapid bi-directional communication ? Construct serverless applications with Amazon Lambda ? Test and debug with headless browsers, CPU profiling, Mocha, Sinon, and more ? Scale applications vertically and horizontally across multiple cores and web services In Detail Node.js, a modern development environment that enables developers to write server- and client-side code with JavaScript, thus becoming a popular choice among developers. This book covers the features of Node that are especially helpful to developers creating highly concurrent real-time applications. It takes you on a tour of Node's innovative event non-blocking design, showing you how to build professional applications. This edition has been updated to cover the latest features of Node 9 and ES6. All code examples and demo applications have been completely rewritten using the latest techniques, introducing Promises, functional programming, async/await, and other cutting-edge patterns for writing JavaScript code. Learn how to use microservices to simplify the design and composition of distributed systems. From building serverless cloud functions to native C++ plugins, from chatbots to massively scalable SMS-driven applications, you'll be prepared for building the next generation of distributed software. By the end of this book, you'll be building better Node applications more quickly, with less code and more power, and know how to run them at scale in production environments. Style and approach Mastering Node.js contains all of the examples and explanations you'll need to build applications in a short amount of time and at a low cost, running rapidly and at scale.

Design and build land, air, and sea drones using Ardupilot with Pixhawk 2.1 About This Book ? Explore the best practices used by the top industry professionals that will not only help you build drones in time, but also build effective solutions to cater to. ? Navigate through the complexities of Ardupilot to put together a complete functional UAV and assemble your drone ? Learn through practical examples that help you build robust UAV flight and ground control components Who This Book Is For The primary audience for this book is anyone (enthusiasts and hobbyists) who dream of building their own drones. It will also help those who are trying to build UAVs for commercial purposes. Some prior experience with microcontrollers and electronics would be useful. What You Will Learn ? Kitbash "dumb" objects into smart ones ? Program Pixhawk for your drones ? Fabricate your own parts out of different materials ? Integrate Pixhawk into different types of drones ? Build and understand the significant difference between land, sea, and air drones ? Adapt old Pixhawk sensors to the new Pixhawk 2.1 plugs ? Become familiar with procedures for testing your new drones In Detail The Ardupilot platform is an application ecosystem that encompasses various OS projects for drone programming, flight control, and advanced functionalities.The Ardupilot platform supports many Comms and APIs, such as DroneKit, ROS, and MAVLink. It unites OS drone projects to provide a common codebase. With the help of this book, you will have the satisfaction of building a drone from scratch and exploring its many recreational uses (aerial photography, playing, aerial surveillance, and so on). This book helps individuals and communities build powerful UAVs for both personal and commercial purposes. You will learn to unleash the Ardupilot technology for building, monitoring, and controlling your drones.This is a step-by-step guide covering practical examples and instructions for assembling a drone, building ground control unit using microcontrollers, QgroundControl, and MissionPlanner. You can further build robotic applications on your drone utilizing critical software libraries and tools from the ROS framework. With the help of DroneKit and MAVLink (for reliable communication), you can customize applications via cloud and mobile to interact with your UAV. Style and approach Step-by-step instructions to help assemble your first drone with the Ardupilot platform.

Learn how to leverage the features of the new Entity Framework Core APIs and use them to build pure .NET Core applications. About This Book ? Learn how to effectively manage your database to make it more productive and maintainable. ? Write simplified queries using LINQ to acquire the desired data easily ? Raise the abstraction level from data to objects so teams can function independently, resulting in easily maintainable code Who This Book Is For This book is for .NET Core developers who would like to integrate EF Core in their application. Prior knowledge of .NET Core and C# is assumed. What You Will Learn ? Create databases and perform CRUD operations on them ? Understand and build relationships (related to entities, keys, and properties) ? Understand in-built, custom, and remote validation (both client and server side) ? You will learn to handle concurrency to build responsive applications ? You will handle transactions and multi-tenancy while also improving performance In Detail Being able to create and maintain data-oriented applications has become crucial in modern programming. This is why Microsoft came up with Entity Framework so architects can optimize storage requirements while also writing efficient and maintainable application code. This book is a comprehensive guide that will show how to utilize the power of the Entity Framework to build efficient .NET Core applications. It not only teaches all the fundamentals of Entity Framework Core but also demonstrates how to use it practically so you can implement it in your software development. The book is divided into three modules. The first module focuses on building entities and relationships. Here you will also learn about different mapping techniques, which will help you choose the one best suited to your application design. Once you have understood the fundamentals of the Entity Framework, you will move on to learn about validation and querying in the second module. It will also teach you how to execute raw SQL queries and extend the Entity Framework to leverage Query Objects using the Query Object Pattern. The final module of the book focuses on performance optimization and managing the security of your application. You will learn to implement failsafe mechanisms using concurrency tokens. The book also explores row-level security and multitenant databases in detail. By the end of the book, you will be proficient in implementing Entity Framework on your .NET Core applications. Style and approach This book is filled with various examples that will help you use Entity Framework Core 2.0 to write efficient software.

Use test-driven approach to develop highly-functional iOS apps with Swift 4 and Xcode 9 About This Book ? A practical guide to writing effective, organized, and clean code that works well ? Learn test-driven principles to help you build better-designed apps with fewer bugs ? A comprehensive overview of the techniques available for TDD in Swift Who This Book Is For To get the most out of this book, you will need some prior experience with Swift application development. You may have already heard about Test-Driven Development (TDD) but you don't need any prior experience of applying it to Swift applications. What You Will Learn ? Implement TDD in Swift application development ? Find bugs before you enter code using the TDD approach ? Use TDD to build models, view controllers, and views ? Test network code with asynchronous tests and stubs ? Write code that is a joy to read and maintain ? Develop functional tests to ensure the app works as planned In Detail Test-driven development (TDD) is a proven way to find software bugs early. Writing tests before you code improves the structure and maintainability of your apps. Using TDD, in combination with Swift 4's improved syntax, means there is no longer any excuse for writing bad code. This book will help you understand the process of TDD and how to apply it to your apps written in Swift. Through practical, real-world examples, you’ll learn how to implement TDD in context. You will begin with an overview of the TDD workflow and then delve into unit-testing concepts and code cycles. You will also plan and structure your test-driven iOS app, and write tests to drive the development of view controllers and helper classes. Next, you’ll learn how to write tests for network code and explore how the test-driven approach—in combination with stubs—helps you write network code even before the backend component is finished. Finally, the book will guide you through the next steps to becoming a testing expert by discussing integration tests, Behavior Driven Development (BDD), open source testing frameworks, and UI Tests (introduced in Xcode 9). Style and approach Using a step-by-step approach, you will develop an entire iOS app using TDD. During the course of the book, you will explore different strategies for writing tests for models, View Controllers, and networking code.

Get a problem-solution approach enriched with code examples for practical and easy comprehension About This Book ? Explore the use of more than 40 best-of-breed plug-ins for improving efficiency ? Secure and maintain Jenkins 2.x by integrating it with LDAP and CAS, which is a Single Sign-on solution ? Efficiently build advanced pipelines with pipeline as code, thus increasing your team's productivity Who This Book Is For If you are a Java developer, a software architect, a technical project manager, a build manager, or a development or QA engineer, then this book is ideal for you. A basic understanding of the software development life cycle and Java development is needed, as well as a rudimentary understanding of Jenkins. What You Will Learn ? Install and Configure Jenkins 2.x on AWS and Azure ? Explore effective ways to manage and monitor Jenkins 2.x ? Secure Jenkins 2.x using Matrix-based Security ? Deploying a WAR file from Jenkins 2.x to Azure App Services and AWS Beanstalk ? Automate deployment of application on AWS and Azure PaaS ? Continuous Testing – Unit Test Execution, Functional Testing and Load Testing In Detail Jenkins 2.x is one of the most popular Continuous Integration servers in the market today. It was designed to maintain, secure, communicate, test, build, and improve the software development process. This book will begin by guiding you through steps for installing and configuring Jenkins 2.x on AWS and Azure. This is followed by steps that enable you to manage and monitor Jenkins 2.x. You will also explore the ways to enhance the overall security of Jenkins 2.x. You will then explore the steps involved in improving the code quality using SonarQube. Then, you will learn the ways to improve quality, followed by how to run performance and functional tests against a web application and web services. Finally, you will see what the available plugins are, concluding with best practices to improve quality. Style and approach This book provides a problem-solution approach to some common tasks and some uncommon tasks using Jenkins 2.x and is well-illustrated with practical code examples.

Switching to Angular, Third Edition is the go-to book to align and get started with the Angular JavaScript framework. Angular contributor and international speaker Minko Gechev will help you square up and start building Angular apps and provide you an insight to the Google’s vision for the framework. About This Book ? Get up to date with Google’s vision for Angular ? Align with Angular version 5 and beyond from any direction with confidence ? Start using TypeScript to supercharge your Angular applications ? Understand the new framework from AngularJS perspective using your prior experience ? Use Angular to quickly build fast and scalable enterprise applications Who This Book Is For This book is for software developers who want to align with a modern version of Angular that’s aligned with Google’s vision of Angular version 5 and beyond, using stable APIs that they can depend on today and in the future. Also for anyone assessing changes to Angular and squaring up for a strategic migration to Angular v5, and for AngularJS developers who want to transfer their mindset to modern Angular version 5 and beyond. What You Will Learn ? Align with Google’s vision for Angular version 5 and beyond ? Confidently move forwards with a long-term understanding of Angular ? Use stable APIs in Angular to build future-proof, blazingly fast, enterprise applications ? Work with TypeScript to supercharge your Angular applications ? Understand the core concepts of Angular, aligned with the vision from Google ? Be ready with Angular from any direction - whether you’re building new new apps with the Angular and ASP.NET stack or upgrading from AngularJS with ngUpgrade In Detail Align your work to stable APIs of Angular, version 5 and beyond, with Angular expert Minko Gechev. Angular is the modern Google framework for you to build high-performing, SEO-friendly, and robust web applications. Switching to Angular, Third Edition shows you how you can align your current and future development with Google’s long term vision for Angular. Gechev shares his expert knowledge and community involvement to give you the clarity you need to confidently switch into Angular and stable APIs. Minko Gechev helps you square up to Angular with an overview of the framework, and understand the long term building blocks of Google’s web framework. Gechev then gives you the lowdown on TypeScript, with a crash-course so you can take advantage of Angular in its native, statically-typed environment. You’ll next move on to see how you can line up with Angular dependency injection, plus how Angular router and forms, and Angular pipes, are designed to work for your projects today and in the future. You'll be squared up and aligned with the vision and techniques of the one Angular, and be ready to start building quick and efficient Angular applications. You’ll know how to take advantage of the latest Angular features, and the core, stable APIs that you can depend on. You’ll be ready to confidently plan your future with the Angular framework. Style and approach In this book, Minko Gechev continues his direct style of sharing knowledge about Angular that he's developed across more than 40 international presentations to Angular developers. First, Minko explains Google's vision of Angular to you, and then you dive into a clear tutorial to work with Angular that's aligned with Google's vision of Angular.

Eliza has been a magnet for the broken hearts of others, who ultimately end up breaking her own. When handsome but emotionally wounded Dr. Jack Dancer enters her life, she won't allow herself to act on their growing attraction. But one night when Jack makes love to her, she knows she is lost, and is devastated by his coolness the next day. She knows that to stop her heart being broken again she must leave. It's only then that Jack finally realizes he's got to tell Eliza how much he loves her, and he recruits the entire village to help persuade her to become his bride! Fiona McArthur once again expertly combines the pace of the E.R. and the joy of the maternity ward, with all the warmth and intensity of a heart-stopping romance.

The Highland Air Was Heavy With Revenge And Mairi MacInnes wanted to breathe deeply of it. Until an arranged marriage with Robert MacBain, an enigmatic lowland lord, whisked her away to a life of adventure, passion–and unspoken love. Generous of spirit. Mighty in battle. Indeed, though he lived in a world of silence, Robert MacBain had gifts any would envy. Yet the Baron of Baincroft lacked true love in his life–until he met and championed Mairi MacInnes, his tempestuous chosen bride. But would she ever hear and heed the loving whispers of his heart?

"Why on earth did I agree to this crazy plan?! This multimillionaire Jack Bullen had a proposal for me–to pose as his girlfriend so he could avoid an unwanted marriage. I said yes–it was a whole lot better than going back to being a waitress. It sounded like fun–a free holiday in Monte Carlo–who'd say no? –But Jack is gorgeous! Like Pierce Brosnan. It's really hard doing all this kissing and flirting when it's all 'pretend.' I want it to be for real! And you know–I'm beginning to think he likes me, too…"

Victim of an abusive marriage, Iana vowed in her widowhood never again to put her fate in masculine hands. But one man, Henri Gillet, heir to the Trouville dynasty, had aroused her slumbering desires–and endangered her deepest resolve. Love, Henri Gillet pondered, was simple. Noble obligations were not. And now he faced a royal-size dilemma–for though the Lady Iana had saved him from certain death, her shadowed past, so full of the darkest secrets, stood between them and threatened a future together…!

SHE WAS A WOMAN WITH IDEAS…AND THAT WAS TROUBLE! All the same, James Garrow found himself wildly attracted to Lady Susanna Childers. True, their wedded union arose from mutual need–with no mention of love. Yet the longer he knew his firebrand bride–the greater grew his desire…! She was deep in the Highlands, a long way from London Society. Still, Susanna Childers vowed to make the best of the bargain she had struck with the enigmatic laird who was now her husband. Besides, he had saved her life once and would again, if need be. So love didn't matter–or did it?

Doctors Tom and Helen Brooke have a great marriage–when they can find the time to see each other amidst the pressures of work at the Belfield Infirmary and the demands of their adorable twins. Despite feeling overworked and underappreciated, Helen knows that she and Tom have something very special. So when Tom's handsome friend becomes their new colleague and makes a play for Helen, she might be flattered but she's not going to stray.Then a series of misunderstandings makes her think maybe Tom doesn't care. Except he does, passionately, and now he's faced with the fight of his life–the fight to save his marriage….

Amber Lawrence is an ordinary woman; she works hard, spends time with her family–and doesn't expect to be offered money to marry! Trouble is, Steve Rockwell's proposal has come at a time when Amber's family needs money. Amber would never normally even consider such an offer–but when she can save her family and get married to a man as sexy as Steve, even the most normal, cool-headed of women would be really, really tempted! Wouldn't she…?

A secret marriage Phoebe Longquist and Lewis Hardin got married on impulse, without a fancy wedding, without family, without fuss. Phoebe wants to keep things quiet and uncomplicated…for a while, anyway. A family secret Lewis would rather not deceive their families. But he'll do it if she really wants…for a while, anyway. He might be a Glory boy made good, but he's also an ex-con and hardly what Phoebe's parents have in mind for their daughter. A glory Christmas Then Lewis learns something shocking about his own family, about who he is. And it makes him take stock of what he has.

Melanie Briggs and her baby daughter create quite a stir when they suddenly arrive to stay at the Stone Ranch. She'd make the perfect wife in Jared Stone's opinion. Not that he has any intention to marry or become an instant dad. He fights every urge to take sweet Melanie to bed. But some things are meant to be…. En route to Montana for the holiday, Will Stone gets stuck in a blizzard with Melanie's wild cousin, Ms. Dylan Briggs. As far as Will is concerned, the snow can't stop soon enough. Then again, sharing a bed with sexy, sassy Dylan might be the perfect way to wait out a storm!

MISTLETOE MARRIAGE OF CONVENIENCE When Jake Bridges suddenly finds himself the guardian of his orphaned niece, he knows he needs a wife. What does a stock tender at a pony express station know about raising little girls? A marriage of convenience to the child's caretaker is the most practical solution. A mail-order marriage seems like Leah Hollister's last chance to know the simple joys of family life. But then she receives word that her would-be groom is dead. Now Jake proposes she marry him. She knows love isn't necessary. Yet the more she learns of sweet Molly's kindhearted uncle, the more she dreams of a true partnership with the man who has unexpectedly captured her heart.

A family in time for Christmas… When millionaire Zac hears of his sister's death, he knows it's time to abandon his party lifestyle and protect his baby niece. Traveling to snowy London, there's no one he'd rather have at his side than his PA, Chloe–beautiful, kind…and utterly off-limits. Chloe knows the pain love can bring, and she is daunted by the prospect of spending Christmas alone with her gorgeous boss…but watching Zac cradling baby Lucy melts her frozen heart. It seems this Christmas might just bring the most special gift of all: a family.

When it came to reinventing a client's image, Maddie Sinclair knew just what to do. But when it came to her own remake, she didn't have a clue. Until photographer Dan Willis took one look at her and knew the most photogenic models in the world couldn't compare to what he saw in Maddie. She was a rare and true beauty, from rher flashing eyes and easy smile to her genuine kindness. Now, no one could be more willing than Dan to play fairy godfather, but was he ready for other men to learn what he already knew: Maddie was gorgeous…inside and out!

she'd assumed her twin's identity, faked an engagement to a man she hardly knew. But only by becoming Alyssa could Brooke Snowden view life through her long-lost sister's eyes…to find the person who wanted Alyssa dead.The deception, she knew, was fraught with risk, but Brooke hadn't anticipated her dangerous attraction to the one man forbidden to her…. It was Jack Chessman's duty as a cop to protect Brooke, and his debt of honor to her twin. But while his regard for Alyssa had never gone beyond brotherly affection, his feelings for pretend fiancée Brooke were of the forever kind. But first, he had to keep her alive….

Celebrate the holidays in Amish Country Heart of Christmas by Marta Perry Amish teacher Susannah Miller suddenly has two new students: the children of her former love. Widowed father Toby Unger broke Susannah's heart ten years ago, but now the handsome Amish man desperately needs help with his troubled little ones. Can the joy of the season reunite two lonely hearts in time for Christmas? A Plain Holiday by Patricia Davids Outspoken nanny Sally Yoder left her Amish community for her rumspringa. Though her heart is back home, the Amish man she loves, Ben Lapp, will never love a bold woman like her. But when a snowstorm strands her, her young charges and Ben on a remote farm at Christmastime, they both might discover that love is the true holiday spirit. Amish teacher Susannah Miller suddenly has two new students: the children of her former love. Widowed father Toby Unger broke Susannah's heart ten years ago, but now the handsome Amish man desperately needs help with his troubled little ones. Can the joy of the season reunite two lonely hearts in time for Christmas? Outspoken nanny Sally Yoder left her Amish community for her rumspringa. Though her heart is back home, the Amish man she loves, Ben Lapp, will never love a bold woman like her. But when a snowstorm strands her, her young charges and Ben on a remote farm at Christmastime, they both might discover that love is the true holiday spirit.

ARMED INTERVENTION When a hotel in Barcelona comes under siege by religious fanatics, innocent guests are suddenly caught in a nightmare to be played out on the world stage. The situation is unraveling fast amid the mounting chaos of blood and fear–even as an American hostage waits for his chance to turn the tide of slaughter. Mack Bolan knows what his captors are capable of; he has stared many times into the rabid eyes of zealots and witnessed the fires of commitment to a warped cause. Judging by the seamless takedown of the premises, he realizes he's up against consummate professionals who are ready for anything and will stop at nothing. But the enemy has made a fatal mistake: They let the Executioner live.