Powerful Command-Line Applications in Go

Defining the To-Do API

To start your to-do tracking tool, you’ll implement some business logic and an API to deal with to-do items.

In this version of the API, you’ll implement two new custom types:

item:

This type represents a single to-do item. You’ll implement this type using a Go struct. A struct is a custom Go type composed of one or more named elements, or fields. Each field consists of a name and a type, each representing a property of the struct. You can find more information about Go structs in the official documentation.^[13] This type won’t be exported, so it can’t be used by API users directly.

List:

This type represents a list of to-do items. It’s implemented by a slice of instances of the type item. This type is exported and visible ...