In this chapter, we'll continue our discussion on some more node fundamentals. We'll explore yargs, and we'll see how to parse command-line arguments using process.argv and yargs. After that, we'll explore JSON. JSON is nothing more than a string that looks kind of like a JavaScript object, with the notable differences being that it uses double quotes instead of single quotes and all of your property names—like name and age, in this case—require quotes around them. We'll look into how to convert an object into a string, then define that string, use it, and convert it back to an object.
After we've done that, we'll fill out the addNote function. Finally, we'll look into refactor, moving the functionality into individual functions and testing the functionality.
More specifically, we'll go...