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New Book - A Practical Guide for Java 8 Lambdas and Streams

This book is not the first book about Java 8 lambda expressions and streams, and it's definitely not the last book about lambda expressions and streams. Java 8 is a Java platform upgrade which the community looking forward to for a long time. Lambda expressions and streams quickly gain popularity in Java developers. There are already a lot of books and online tutorials about lambda expressions and streams. This book is trying to explain lambda expressions and streams from a different perspective.

  • For lambda expressions, this book explains in details based on JSR 335.
  • For streams, this book covers fundamental concepts of Java core library.
  • This book provides how-to examples for lambda expressions and streams.
  • This book also covers the important utility class Optional.

Lambda expressions and streams are easy to understand and use. This book tries to provide some insights about how to use them efficiently.

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New Book - Build Mobile Apps with Ionic and Firebase

With the prevalence of mobile apps, more and more developers want to learn how to build mobile apps. Developers can choose iOS or Android platforms to develop mobile apps. But learning Objective-C/Swift or Java is not an easy task. Web development programming languages, HTML, JavaScript and CSS, are easier to understand and learn. Building mobile apps is made possible by Apache Cordova, which creates a new type of mobile apps - Hybrid mobile apps. Hybrid mobile apps are actually running in an internal brower inside a wrapper created by Apache Cordova. With hybrid mobile apps, we can have one single code base for different platforms. Developers also can use their existing web development skills.

Ionic framework builds on top of Apache Cordova and provides out-of-box components which make developing hybrid mobile apps much easier. Ionic uses Angular as the JavaScript framework and has nice default UI style with similar look & feel as native apps. Firebase is a realtime database which can be accessed in web apps using JavaScript. With Ionic and Firebase, you just need to develop front-end code. You don't need to manage any back-end code or servers.

This book is an introductory guide to build hybrid mobile apps using Ionic and Firebase. This book is sample driven. In this book, we are going to build a Hacker News client app. This app can view top stories in Hacker News, view comments of a story, add stories to favorites, etc. This book covers various topics in mobile apps development:

  • Local development environment setup
  • Ionic quickstart
  • Work with Firebase
  • State transition
  • Common UI components: lists, cards, modals, popups
  • Forms & inputs
  • User authentication
  • Publish apps

Source code of the sample app is available on GitHub. View screen-shots of the sample at here.

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