...

Updating the Phone Book Application

Let’s update the phone book application using the concepts we have learned so far.

We'll cover the following...

Using cobra
Storing and loading JSON data
Implementing the delete command
Implementing the insert command
Implementing the list command
Implementing the search command
Let’s try our code

In this lesson, we will change the format that the phone application uses for storing its data. This time, the phone book application uses JSON all over. Additionally, it uses the cobra package for implementing the supported commands. The path of the GitHub repository is here —we can git clone that directory if we want but try to create your own version if you have the time.

Note: When developing real applications, do not forget to git commit and git push the changes from time to time to ensure that we keep a history of the development phase in GitHub or GitLab. Among other things, this is a good way to keep backups!

Using `cobra`

First, we need to create an empty GitHub repository and clone it:

Course Introduction

Introduction to Go

Basic Go Data Types

Composite Data Types

Reflection and Interfaces

Go Packages and Functions

Telling a UNIX System What to Do

Go Concurrency

Building Web Services

Working with TCP/IP and WebSocket

Working with REST APIs

Code Testing and Profiling

Working with gRPC

Go Generics

Conclusion

Appendix A—Go Garbage Collector

Updating the Phone Book Application

Using `cobra`

Updating the Phone Book Application

Using cobra

Using `cobra`