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Updating the Phone Book Application I

Explore how to extend a Go phone book application by implementing environment variable handling for CSV file paths and enhancing sorting using interfaces and reflection. Learn to create and verify file existence in Go, improving data management without recompilation.

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 ...