Updating the Phone Book Application

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:

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