Book Image

Angular Services

Book Image

Angular Services

Overview of this book

A primary concern with modern day applications is that they need to be dynamic, and for that, data access from the server side, data authentication, and security are very important. Angular leverages its services to create such state-of-the-art dynamic applications. This book will help you create and design customized services, integrate them into your applications, import third-party plugins, and make your apps perform better and faster. This book starts with a basic rundown on how you can create your own Angular development environment compatible with v2 and v4. You will then use Bootstrap and Angular UI components to create pages. You will also understand how to use controllers to collect data and populate them into NG UIs. Later, you will then create a rating service to evaluate entries and assign a score to them. Next, you will create "cron jobs" in NG. We will then create a crawler service to find all relevant resources regarding a selected headline and generate reports on it. Finally, you will create a service to manage accuracy and provide feedback about troubled areas in the app created. This book is up to date for the 2.4 release and is compatible with the 4.0 release as well, and it does not have any code based on the beta or release candidates.
Table of Contents (15 chapters)
Angular Services
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Chapter 6.  The Evidence Tree Builder Service - Implementing the Business Logic

In the previous chapter, we managed to save the top-ranked news items, so now we can choose the item of our interest and build an evidence tree around it. An evidence tree is basically a collection of concepts which directly or indirectly relate to the subject we want to find more facts about. We can visualize it as a network of nodes which are connected to each other via edges and each node contains valuable information regarding the subject of our interest.

Sometimes we might have a question in our mind and want to find the answer related to that news. It shouldn't always be a question. Sometimes we just want to gather more information about the news itself. That question or intention forms the subject of our interest and whatever our intention might be, we need to create an evidence tree which supports the subject of our interest.

Note

The evidence board is not a new concept and detectives use a physical...