Powerful Command-Line Applications in Go

Exercises

You can try the following exercises to expand your skills:

• Implement the flag -del to delete an item from the list. Use the Delete method from the API to perform the action.

• Add another flag to enable verbose output, showing information like date/time.

• Add another flag to prevent displaying completed items.

• Update the custom usage function to include additional instructions on how to provide new tasks to the tool.

• Include test cases for the remaining options, such as -complete.

• Update the tests to use the TODO_FILENAME environment variable instead of hard-coding the test file name so that it doesn’t cause conflicts with an existing file.

• Update the getTask function allowing it to handle multiline input from STDIN. Each line should be ...