Advanced Techniques in Go Programming/

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Updating the Phone Book Application I

Updating the Phone Book Application I

Let’s follow step-by-step instructions on using environment variables to enhance our phone book application.

We'll cover the following...

The functionality that is added to this new version of the phone book utility is the following:

  • The CSV file path can be optionally given as an environment variable named PHONEBOOK.

  • The list command sorts the output based on the surname field.

Although we could have given the path of the CSV file as a command-line argument instead of the value of an environment variable, it would have ...