Enhance the performance of your applications by using React and adding the Progressive web app capability to it About This Book ? Bring the best of mobile sites and native apps to your users with progressive web applications ? Create fast, reliable, and engaging PWAs with React and Firebase ? Create high-performance applications even with low connection speeds by leveraging modern web technologies Who This Book Is For This book is for Java* Developers who want to develop high performance Web User Interfaces. This book requires basic knowledge of HTML, CSS and JavaScript. What You Will Learn ? Set up Webpack configuration, as well as get the development server running ? Learn basic Firebase configuration and deployment ? Create routes, manage multiple components, and learn how to use React Router v4 to manage the flow of data ? Use React life cycle methods to load data ? Add a service worker to the app and learn how it works ? Use a service worker to send Push Notifications ? Configure Webpack to split up the JavaScript bundle and lazy load component files ? Learn how to use the web Cache API to use your app offline ? Audit PWAs with Google's Lighthouse tool In Detail For years, the speed and power of web apps has lagged behind native applications. Progressive Web Apps (PWAs) aim to solve this by bridging the gap between the web apps and native apps, delivering a host of exciting features. Simultaneously, React is fast becoming the go-to solution for building modern web UIs, combining ease of development with performance and capability. Using React alongside PWA technology will make it easy for you to build a fast, beautiful, and functional web app. After an introduction and brief overview of the goals of PWAs, the book moves on to setting up the application structure. From there, it covers the Webpack build process and the process of creating React components. You'll learn how to set up the backend database and authentication solution to communicate with Firebase and how to work with React Router. Next, you will create and configure your web app manifest, making your PWA installable on mobile devices. Then you'll get introduced to service workers and see how they work as we configure the app to send push notifications using Firebase Cloud Messaging. We'll also explore the App Shell pattern, a key concept in PWAs and look at its advantages regarding efficient performance. Finally, you'll learn how to add offline capabilities to the app with caching and confirm your progress by auditing your PWA with Lighthouse. Also, you'll discover helper libraries and shortcuts that will help you save time and understand the future of PWA development. Style and approach This is a step-by-step book, wherein, you will use the React framework to create a complete progressive web app.

Share code and assets across domains in Web applications with CORS About This Book ? A step-by-step guide but at a high level/fast pace. Not all steps are covered as a basic knowledge is assumed ? Provides a basic overview of the concepts but the focus is on providing the practical skills required to develop applications ? Focuses on providing practical examples Who This Book Is For Web developers have been limited by the Same Origin Policy and often wish they could spread their application across different domains. You know JavaScript and AJAX, and have run up against the Same Domain Policy, which is limiting your applications. What You Will Learn ? Why you need CORS: Bending the Same Origin Policy and basic CORS implementation, headers and XMLHttpRequest ? Creating proxies for CORS: Sometimes the header is not enough ? Security: vulnerabilities and how to secure your CORS application ? CORS implementations in Content Management systems ? Learn about CORS in Windows applications ? Take CORS on the Cloud ? Apply CORS in Node.js ? Best practices for CORS In Detail This book explains how to use CORS, including specific implementations for platforms such as Drupal, WordPress, IIS Server, ASP.NET, JBoss, Windows Azure, and Salesforce, as well as how to use CORS in the Cloud on Amazon AWS, YouTube, Mulesoft, and others. It examines limitations, security risks, and alternatives to CORS. It explores the W3C Specification and major developer documentation sources about CORS. It attempts to predict what kinds of extension to the CORS specification, or completely new techniques, will come in the future to address the limitations of CORS Web developers will learn how to share code and assets across domains with CORS. They will learn a variety of techniques that are rather similar in their method and syntax. The book is organized by similar types of framework and application, so it can be used as a reference. Developers will learn about special cases, such as when a proxy is necessary. And they will learn about some alternative techniques that achieve similar goals, and when they may be preferable to using CORS Style and approach A step-by-step guide filled with real-world applications

Implement classic and functional data structures and algorithms using Python About This Book ? A step by step guide, which will provide you with a thorough discussion on the analysis and design of fundamental Python data structures. ? Get a better understanding of advanced Python concepts such as big-o notation, dynamic programming, and functional data structures. ? Explore illustrations to present data structures and algorithms, as well as their analysis, in a clear, visual manner. Who This Book Is For The book will appeal to Python developers. A basic knowledge of Python is expected. What You Will Learn ? Gain a solid understanding of Python data structures. ? Build sophisticated data applications. ? Understand the common programming patterns and algorithms used in Python data science. ? Write efficient robust code. In Detail Data structures allow you to organize data in a particular way efficiently. They are critical to any problem, provide a complete solution, and act like reusable code. In this book, you will learn the essential Python data structures and the most common algorithms. With this easy-to-read book, you will be able to understand the power of linked lists, double linked lists, and circular linked lists. You will be able to create complex data structures such as graphs, stacks and queues. We will explore the application of binary searches and binary search trees. You will learn the common techniques and structures used in tasks such as preprocessing, modeling, and transforming data. We will also discuss how to organize your code in a manageable, consistent, and extendable way. The book will explore in detail sorting algorithms such as bubble sort, selection sort, insertion sort, and merge sort. By the end of the book, you will learn how to build components that are easy to understand, debug, and use in different applications. Style and approach The easy-to-read book with its fast-paced nature will improve the productivity of Python programmers and improve the performance of Python applications.

Deep dive into the unified, distributed storage system in order to provide excellent performance About This Book ? Leverage Ceph's advanced features such as erasure coding, tiering, and Bluestore ? Solve large-scale problems with Ceph as a tool by understanding its strengths and weaknesses to develop the best solutions ? A practical guide that covers engaging use cases to help you use advanced features of Ceph effectively Who This Book Is For If you are a developer and an administrator who has deployed a Ceph cluster before and are curious about some of the most advanced features in order to improve performance then this book is for you What You Will Learn ?Know when and how to use some of Ceph's advanced new features ? Set up a test cluster with Ansible and some virtual machines using VirtualBox and Vagrant ?Develop novel solutions to massive problems with librados and shared object classes. ? Choose intelligent parameters for an erasure coded pool and set it up. ? Configure the Bluestore settings and see how they interact with different hardware configurations. ? Keep Ceph running through thick and thin with tuning, monitoring and disaster recovery advice. In Detail Mastering Ceph covers all that you need to know to use Ceph effectively. Starting with design goals and planning steps that should be undertaken to ensure successful deployments, you will be guided through to setting up and deploying the Ceph cluster, with the help of orchestration tools. Key areas of Ceph including Bluestore, Erasure coding and cache tiering will be covered with help of examples. Development of applications which use Librados and Distributed computations with shared object classes are also covered. A section on tuning will take you through the process of optimisizing both Ceph and its supporting infrastructure. Finally, you will learn to troubleshoot issues and handle various scenarios where Ceph is likely not to recover on its own. By the end of the book, you will be able to successfully deploy and operate a resilient high performance Ceph cluster. Style and approach A practical guide which has each chapter explaining the concept, sharing tips and tricks and a use case to implement the most powerful features of Ceph

Of course you love being a parent. But sometimes, it just sucks. I know. I'm Amber Dusick and I started my blog Parenting: Illustrated with Crappy Pictures because I needed a place to vent about the funny (and frustrating) day-to-day things that happened to me as a parent. Turns out, poo is hilarious! At least when you're not the one wiping it up. This book won't make your frustrating moments any less crappy. But these stories about my Crappy Baby, Crappy Boy and my husband, Crappy Papa, will hopefully make you laugh. Because you're not alone. And sometimes the crappiest moments make the best memories. Parenting is wonderful! And also, well, you know. ‘The drawings aren't very good, Mama.' -Crappy Boy, age 5

Success is all in how you define it With meticulous career planning and a couple of dirty martinis, there is very little that New York City investment banker Vina Chopra can’t do. And now that she’s decided to get serious about fi nding her mate, there is very little that Vina won’t try—even if it means letting her parents get involved. After all, what does she have to lose? Her longest-term relationship thus far has been with the ulcer she ultimately named Fred (unless you count the ex-boyfriend who won’t go away). Amid a series of dates with “the nice Indian doctor” and an offi ce scandal that could permanently end her career, Vina starts to question everything she’s been working for. Who has she been trying to please all these years? Is this the life that she really wants? Can she fi nally learn to put aside her family’s expectations long enough and become the girl most likely to find a happiness all her own?

Little girl lost Ruby Hudson finds new evidence that could shed light on her childhood friend's disappearance. But she'll have to fight for her life to keep it out of the wrong person's hands. Cooper Stokes' brother is still the prime suspect, and as the cold case heats up, so do Ruby's forgotten feelings for Cooper. Ruby wants justice for her friend. Cooper wants to prove his brother's innocence. Despite being on opposite sides, they find themselves drawn to one another. But the deeper they dig into decades-old secrets, the closer they come to having to make a choice between family and love. Wings of Danger: The path to love is treacherous

Enter the world of the internationally bestselling Iron Fey series. Dangerous faeries. Heartbreaking romance. Thrilling action and limitless adventure. The world of the fey has never been so powerful. This collection includes three novellas set in the world of The Iron Fey plus the expanded Guide to the Nevernever and exclusive information about Julie Kagawa’s unforgettable world of Faery. Winter’s Passage Never make a promise to a faery. They always come to collect. Now Meghan Chase must fulfill her promise to Prince Ash of the Winter Court and embark upon a dangerous journey into the heart of enemy territory—while being pursued by a relentless new foe and guarding her own foolish heart. Summer’s Crossing What can turn enemies into reluctant allies? A call from the Exile Queen, Leanansidhe, ties legendary prankster Puck to his archenemy Prince Ash on a journey that may end in betrayal and will set them both on an irreversible path.

Out of the ashes of the conflagration that savaged mankind two centuries ago, Deathlands was born–a tortured testament to a world long gone. Yet, in this kill-or-be-killed world where justice is the way of the past and blood is law, hope is the last refuge of the doomed. For Ryan Cawdor, driven by a warrior's instinct to survive, it's a world that exacts a devil's bargain: the struggle for daily existence in return for a chance to forge a better life. Emerging from a gateway into a redoubt filled with preDark technology, Ryan and his band hope to unlock some of the secrets of post nuclear America. But the fortified redoubt is under the control of a half-mad former sec man hell-bent on vengeance, who orders Ryan and the others to jump-start his private war against two local barons. Under the harsh and pitiless glare of the radblasted desert sun, the companions fight to see another day, whatever it brings…. In the Deathlands, the condemned shall inherit the earth…

THE CHRISTMAS CHILDREN Reserved widow Eileen Pierce never considered herself the kind of woman who was cut out to be a mother. She wouldn't know what to do with one child, much less ten. But when handyman Simon Tucker is stranded in town with a group of young orphans at Christmastime, she discovers she can't just turn them away. Simon knows there's more to Eileen than meets the eye. Though his easygoing demeanor immediately clashes with her buttoned-up propriety, Simon's kindness soon melts Eileen's stern facade. Simon and the children already upended Eileen's quiet, orderly life. Will they do the same to her guarded heart? Texas Grooms: In search of their brides…

WAS HE REALLY THE BEST MAN? Police chief Jake O'Connor hadn't seen tomboy Zoe Russell in ten years–ever since he eloped and broke his best friend's heart. Now they had to walk down the aisle together–as maid of honor and best man in her sister's wedding! But Jake wasn't prepared for Zoe's stunning transformation, or the passionate feelings stirring inside him…. Zoe had tried valiantly to forget Jake, but no man she'd met in the big city came close to sexy, stubborn, small-town Jake O'Connor. Her matchmaking sister was intent on getting them back together, but could Zoe convince the love of her life that they were meant to walk down the aisle…as bride and groom?

Why do my jeans fit only in the morning? Why am I always guzzling Pepto-Bismol before a big meeting? Could my PMS cramps mean something serious? Here, finally, are the answers to these questions, and hundreds more, about the nagging stomach problems that plague so many women. In this reassuring guide, Dr. Jacqueline Wolf, a leading expert in the field of GI health, explains the causes and cures for women’s most common digestive ailments (including bloating, constipation, diarrhea, acid reflux, IBS) and more serious, life-altering conditions like Crohn’s disease and endometriosis. This candid book deals with these sensitive issues in a down-to-earth way and eradicates the secrecy and shame surrounding these urgent problems once and for all. A Woman’s Guide to a Healthy Stomach includes: exercise and stress management tips the latest information on probiotics and prebiotics advice on knowing when to consult your doctor and what questions to ask and much more

Snowbound with a millionaire Faith Shaw can't wait for another hometown Thanksgiving with the good people of Jasper Gulch. Turkey, mashed potatoes, apple pie–and this year's centennial celebration. Yet there's one person who isn't happy to be there: Dale Massey, the Shaw family's reluctant houseguest. When a winter storm strands the big-city millionaire in Montana, he is far from pleased. But the mayor's daughter suspects Dale's all-business attitude is masking a deeper hurt. Faith can't help but feel he was sent to Jasper Gulch for a reason. Can an old-fashioned girl and some holiday tradition help bring his weary heart home? BIG SKY CENTENNIAL: A small town rich in history…and love Faith Shaw can't wait for another hometown Thanksgiving with the good people of Jasper Gulch. Turkey, mashed potatoes, apple pie–and this year's centennial celebration. Yet there's one person who isn't happy to be there: Dale Massey, the Shaw family's reluctant houseguest. When a winter storm strands the big-city millionaire in Montana, he is far from pleased. But the mayor's daughter suspects Dale's all-business attitude is masking a deeper hurt. Faith can't help but feel he was sent to Jasper Gulch for a reason. Can an old-fashioned girl and some holiday tradition help bring his weary heart home? BIG SKY CENTENNIAL: A small town rich in history…and love

Healing Their Hearts Nicki Latimer never expected to be back in her tiny Mississippi hometown–much less running a store with a baby on her hip. But when her father falls ill, Nicki will do anything to save the family business…even putting her dreams on hold. And she's found just the person to help her. Ethan Stone is strong and reliable, but also haunted by his past as a war photographer. He's convinced he could never be the man Nicki thinks he is. But with Ethan by her side, Nicki's dreams of love and family are closer than she thinks. Home to Dover: A small town with a big heart Nicki Latimer never expected to be back in her tiny Mississippi hometown–much less running a store with a baby on her hip. But when her father falls ill, Nicki will do anything to save the family business…even putting her dreams on hold. And she's found just the person to help her. Ethan Stone is strong and reliable, but also haunted by his past as a war photographer. He's convinced he could never be the man Nicki thinks he is. But with Ethan by her side, Nicki's dreams of love and family are closer than she thinks. Home to Dover: A small

THE LADY HAS A SECRET.… No one would ever imagine a fresh-faced young woman could be robbing stage bandits of their ill-gotten fortunes. But Jennie Jones is desperate to save her family’s ranch from foreclosure. And the risks seem worth it, until her upright new ranch hand offers a glimpse of how much is really at stake. Former bounty hunter Caleb Johnson is ready for a new, clean start. With a woman like Jennie, he could build that future here in Utah territory. But only if his gentle faith can guide her in a choice between the land she’s fought so hard to save, and a future by his side.

The Abbots: A Dynasty in the Making Love Is The Riskiest Business Of All If Sophie Foster counted her blessings, her children would top the list–except when their obsession with finding a father puts her on the spot. Like that day two of them decide to ensnare a member of the wealthy Abbott clan who they agree would be perfect for the part–if he wasn't so addicted to danger. Sophie knows that handsome Sawyer Abbott does stunts to raise money for good causes, but bitter experience has taught her that men who live on the edge end up hurting themselves and the people who love them. The daredevil's sun-kissed hair and chiseled bronze features, however, come with the heart of a hero, and now it's her turn to learn what women in the small town of Losthampton, Long Island, have been saying about Sawyer Abbott all along…. Resistance Is Futile!

A Buddhist monk sets himself ablaze in protest. A woman swan dives to her death in Manhattan's East River. Secrets on 1970s Cambodia emerge in Hell's Kitchen. Now Maggie Malone must trace the steps of a ghost-father in the CIA, to save her own life. Running her father's venerable Irish bar, Maggie and her criminally inclined brother are scarcely surprised when a man shows up on their doorstep, holding an urn full of ashes, with news that her father is not just missing. He's dead. Clutching a fistful of damning old photos, Maggie enlists her reluctant boyfriend, Detective Bobby Gonzalez, to help her unravel the mystery of her father's murder. But unearthing her father's murky secrets means tracing Maggie's and her brother's roots to the flames of Vietnam. Who was their father? What became of a tiny baby girl sent to America in Operation Babylift? And why will shadowy figures stop at nothing to prevent the secrets of the jungle and a family coming to light, even if that means destroying Maggie and her brother?

JAWS OF DEATH India is a country whose history is written in blood, and its legacy is cities teeming with human misery and vultures profiting from evil and corruption. Balahadra Naraka is a big game poacher turned murderer of anyone who stands in his way: cops, soldiers, game wardens and, now, U.S. diplomats. His savagery, coupled with his own government's failed attempts to stop him, translates to open season for a warrior more than ready to end Naraka's long, cruel career. The hunt will take Mack Bolan to one of the darkest, least hospitable places on earth: the swamps and jungles of India's Sundarbans, where the warlord has taken the number one spot on the Executioner's most endangered list.

BETRAYAL TORE THEM APART Amelia Greystone was deeply in love when the earl of St. Just abruptly ended his courtship and left Cornwall, ten years earlier. So she is stunned when Simon returns, recently widowed. Now she must forget the past they shared and his betrayal and console him as any neighbor would. Simon has changed—he is dark and haunted now–but he can still make her reel with a single look. When he offers her the position of housekeeper, Amelia knows she must refuse. But for the sake of his children, she throws all caution to the wind…. PASSION WILL REUNITE THEM A British spy, Simon Grenville is now playing both sides in a time of war, his goal to keep his sons safe. But when he is brought face to face with the woman he once loved, he realizes nothing about his feelings for Amelia has changed–if anything, they are even stronger. Still Simon knows he must stay away from Amelia; his life is too dangerous now. But sometimes, passion is too strong to be denied….

YOU ARE NOW ENTERING RIVERBEND, INDIANA Riverbend…home of the River Rats–a group of small-town sons and daughters who've been friends since high school. The River Rats are all grown up now. Living their lives and learning that some days are good and some days aren't–and that you can get through anything as long as you have your friends. Mitch Sterling has a lot on his plate. He owns a hardware store that's competing with a big national chain. He's taking care of his elderly grandfather–though Granddad might argue about that–and he's a single father to a young child. On top of that, he's just met a very pregnant, very stranded, very single woman who needs a friend. And if Mitch is honest with himself, he'll admit that he wants to be more than her friend.…

NEW YORK TIMES BESTSELLING TITLE THE ORPHAN'S TALE OUT NOW Paris, 1919 The nation’s leaders have gathered to rebuild the world from the ashes of The Great War. But for one woman, the City of Light harbours dark secrets and dangerous liaisons Brought to the peace conference by her German Diplomat father, Margot resents being trapped in Paris where she is still looked upon as the enemy. Yet returning to Berlin means a life with the wounded fiancé she barely knows. Torn between duty and the desire to be free, Margot strikes up unlikely alliances: with Krysia, a musician who protects a secret; and with Georg, the handsome, damaged naval officer who makes Margot question where her true loyalties should lie. Against the backdrop of one of the most significant events of the century, a delicate web of lies obscures the line between the casualties of war and of the heart, making trust a luxury that no one can afford. THE STUNNING PREQUEL TO THE BESTSELLING NOVEL, KOMMANDANT’S GIRL, HERALDED A ‘BREATHTAKING DEBUT’ BY PUBLISHERS WEEKLY ‘Wonderfully written and utterly compelling, this is a must-read’ – The Sun Praise for Pam Jenoff: ‘[A] heartbreakingly romantic story of forbidden love during WW2’ – Heat ‘Must read’ – Daily Express