Developing a basic phone book application

In this section, to utilize the skills you've picked up so far, we will develop a basic phone book application in Go. Despite its limitations, the presented application is a command-line utility that searches a slice of structures that is statically defined (hardcoded) in the Go code. The utility offers support for two commands named search and list that search for a given surname and return its full record if the surname is found, and lists all available records, respectively.

The implementation has many shortcomings, including the following:

• If you want to add or delete any data, you need to change the source code
• You cannot present the data in a sorted form, which might be OK when you have 3 entries but might not work with more than 40 entries
• You cannot export your data or load it from an external file
• You cannot distribute the phone book application as a binary file because it uses hardcoded data
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