Book Image

JavaScript and JSON Essentials - Second Edition

By : Bruno Joseph D'mello, Sai S Sriparasa
Book Image

JavaScript and JSON Essentials - Second Edition

By: Bruno Joseph D'mello, Sai S Sriparasa

Overview of this book

JSON is an established and standard format used to exchange data. This book shows how JSON plays different roles in full web development through examples. By the end of this book, you'll have a new perspective on providing solutions for your applications and handling their complexities. After establishing a strong basic foundation with JSON, you'll learn to build frontend apps by creating a carousel. Next, you'll learn to implement JSON with Angular 5, Node.js, template embedding, and composer.json in PHP. This book will also help you implement Hapi.js (known for its JSON-configurable architecture) for server-side scripting. You'll learn to implement JSON for real-time apps using Kafka, as well as how to implement JSON for a task runner, and for MongoDB BSON storage. The book ends with some case studies on JSON formats to help you sharpen your creativity by exploring futuristic JSON implementations. By the end of the book, you'll be up and running with all the essential features of JSON and JavaScript and able to build fast, scalable, and efficient web applications.
Table of Contents (20 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Index

Modifying JSON


JSON retrieved from a JSON feed is always going to be read-only; as such, data feeds do not provide functionality to modify their data from unverified sources. There are many cases where we would want to ingest the data from an external data feed, and then modify that content as per our requirements. An example is a company that is using a data feed that is being supplied by a data vendor, but the data that is being provided is a lot more than the company requires. In such cases, rather than using the whole feed, the company would only extract a part of it, perform certain operations to modify it as per their requirements, and reuse the new JSON object. Let us take our employeeJSON feed.

Assume that the name of the company was different during different periods. We want to group the employees by company name, which is based on when they joined. Employees who joined the company before 2006 belong toCompany1and those who joined the company in 2006 or after belong toCompany2....